| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | //
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| 28 |
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| 29 | #include "globals.hh"
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| 30 | #include "G4ios.hh"
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| 31 |
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| 32 | //
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| 33 | // G4 Process: Gheisha High Energy Collision model.
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| 34 | // This includes the high energy cascading model, the two-body-resonance model
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| 35 | // and the low energy two-body model. Not included is the low energy stuff
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| 36 | // like nuclear reactions, nuclear fission without any cascading and all
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| 37 | // processes for particles at rest.
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| 38 | //
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| 39 | // H. Fesefeldt, RWTH-Aachen, 23-October-1996
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| 40 | // Last modified: 29-July-1998
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| 41 | // HPW, fixed bug in getting pdgencoding for nuclei
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| 42 | // Hisaya, fixed HighEnergyCascading
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| 43 | // Fesefeldt, fixed bug in TuningOfHighEnergyCascading, 23 June 2000
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| 44 | // Fesefeldt, fixed next bug in TuningOfHighEnergyCascading, 14 August 2000
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| 45 | //
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| 46 | #include "G4HEInelastic.hh"
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| 47 | #include "G4HEVector.hh"
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| 48 | #include "G4ParticleDefinition.hh"
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| 49 | #include "G4DynamicParticle.hh"
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| 50 | #include "G4ParticleTable.hh"
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| 51 | #include "G4KaonZero.hh"
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| 52 | #include "G4AntiKaonZero.hh"
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| 53 | #include "G4Deuteron.hh"
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| 54 | #include "G4Triton.hh"
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| 55 | #include "G4Alpha.hh"
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| 56 |
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| 57 | void G4HEInelastic::FillParticleChange(G4HEVector pv[], G4int aVecLength)
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| 58 | {
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| 59 | theParticleChange.Clear();
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| 60 | for (G4int i=0; i<aVecLength; i++)
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| 61 | {
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| 62 | G4int pdgCode = pv[i].getCode();
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| 63 | G4ParticleDefinition * aDefinition=NULL;
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| 64 | if(pdgCode == 0)
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| 65 | {
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| 66 | G4int bNumber = pv[i].getBaryonNumber();
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| 67 | if(bNumber==2) aDefinition = G4Deuteron::Deuteron();
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| 68 | if(bNumber==3) aDefinition = G4Triton::Triton();
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| 69 | if(bNumber==4) aDefinition = G4Alpha::Alpha();
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| 70 | }
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| 71 | else
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| 72 | {
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| 73 | aDefinition = G4ParticleTable::GetParticleTable()->FindParticle(pdgCode);
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| 74 | }
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| 75 | G4DynamicParticle * aParticle = new G4DynamicParticle();
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| 76 | aParticle->SetDefinition(aDefinition);
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| 77 | aParticle->SetMomentum(pv[i].getMomentum()*GeV);
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| 78 | theParticleChange.AddSecondary(aParticle);
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| 79 | G4ParticleDefinition * dummy = G4KaonZero::KaonZero();
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| 80 | dummy = G4AntiKaonZero::AntiKaonZero();
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| 81 | }
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| 82 | }
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| 83 |
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| 84 | void
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| 85 | G4HEInelastic::SetParticles()
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| 86 | {
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| 87 | PionPlus.setDefinition("PionPlus");
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| 88 | PionZero.setDefinition("PionZero");
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| 89 | PionMinus.setDefinition("PionMinus");
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| 90 | KaonPlus.setDefinition("KaonPlus");
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| 91 | KaonZero.setDefinition("KaonZero");
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| 92 | AntiKaonZero.setDefinition("AntiKaonZero");
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| 93 | KaonMinus.setDefinition("KaonMinus");
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| 94 | KaonZeroShort.setDefinition("KaonZeroShort");
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| 95 | KaonZeroLong.setDefinition("KaonZeroLong");
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| 96 | Proton.setDefinition("Proton");
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| 97 | AntiProton.setDefinition("AntiProton");
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| 98 | Neutron.setDefinition("Neutron");
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| 99 | AntiNeutron.setDefinition("AntiNeutron");
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| 100 | Lambda.setDefinition("Lambda");
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| 101 | AntiLambda.setDefinition("AntiLambda");
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| 102 | SigmaPlus.setDefinition("SigmaPlus");
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| 103 | SigmaZero.setDefinition("SigmaZero");
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| 104 | SigmaMinus.setDefinition("SigmaMinus");
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| 105 | AntiSigmaPlus.setDefinition("AntiSigmaPlus");
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| 106 | AntiSigmaZero.setDefinition("AntiSigmaZero");
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| 107 | AntiSigmaMinus.setDefinition("AntiSigmaMinus");
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| 108 | XiZero.setDefinition("XiZero");
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| 109 | XiMinus.setDefinition("XiMinus");
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| 110 | AntiXiZero.setDefinition("AntiXiZero");
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| 111 | AntiXiMinus.setDefinition("AntiXiMinus");
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| 112 | OmegaMinus.setDefinition("OmegaMinus");
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| 113 | AntiOmegaMinus.setDefinition("AntiOmegaMinus");
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| 114 | Deuteron.setDefinition("Deuteron");
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| 115 | Triton.setDefinition("Triton");
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| 116 | Alpha.setDefinition("Alpha");
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| 117 | Gamma.setDefinition("Gamma");
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| 118 | return;
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| 119 | }
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| 120 |
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| 121 | G4double
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| 122 | G4HEInelastic::Amin(G4double a, G4double b)
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| 123 | {
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| 124 | G4double c = a;
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| 125 | if(b < a) c = b;
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| 126 | return c;
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| 127 | }
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| 128 | G4double
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| 129 | G4HEInelastic::Amax(G4double a, G4double b)
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| 130 | {
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| 131 | G4double c = a;
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| 132 | if(b > a) c = b;
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| 133 | return c;
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| 134 | }
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| 135 | G4int
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| 136 | G4HEInelastic::Imin(G4int a, G4int b)
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| 137 | {
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| 138 | G4int c = a;
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| 139 | if(b < a) c = b;
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| 140 | return c;
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| 141 | }
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| 142 | G4int
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| 143 | G4HEInelastic::Imax(G4int a, G4int b)
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| 144 | {
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| 145 | G4int c = a;
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| 146 | if(b > a) c = b;
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| 147 | return c;
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| 148 | }
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| 149 |
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| 150 |
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| 151 | G4double
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| 152 | G4HEInelastic::NuclearInelasticity(G4double incidentKineticEnergy,
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| 153 | G4double atomicWeight,
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| 154 | G4double /* atomicNumber*/)
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| 155 | {
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| 156 | G4double expu = std::log(MAXFLOAT);
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| 157 | G4double expl = -expu;
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| 158 | G4double ala = std::log(atomicWeight);
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| 159 | G4double ale = std::log(incidentKineticEnergy);
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| 160 | G4double sig1 = 0.5;
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| 161 | G4double sig2 = 0.5;
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| 162 | G4double em = Amin(0.239 + 0.0408*ala*ala, 1.);
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| 163 | G4double cinem = Amin(0.0019*std::pow(ala,3.), 0.15);
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| 164 | G4double sig = (ale > em) ? sig2 : sig1;
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| 165 | G4double corr = Amin(Amax(-std::pow(ale-em,2.)/(2.*sig*sig),expl), expu);
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| 166 | G4double dum1 = -(incidentKineticEnergy)*cinem;
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| 167 | G4double dum2 = std::abs(dum1);
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| 168 | G4double dum3 = std::exp(corr);
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| 169 | G4double cinema = 0.;
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| 170 | if (dum2 >= 1.) cinema = dum1*dum3;
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| 171 | else if (dum3 > 1.e-10) cinema = dum1*dum3;
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| 172 | cinema = - Amax(-incidentKineticEnergy, cinema);
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| 173 | if(verboseLevel > 1) {
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| 174 | G4cout << " NuclearInelasticity: " << ala << " " << ale << " "
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| 175 | << em << " " << corr << " " << dum1 << " " << dum2 << " "
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| 176 | << dum3 << " " << cinema << G4endl;
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| 177 | }
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| 178 | return cinema;
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| 179 | }
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| 180 |
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| 181 | G4double
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| 182 | G4HEInelastic::NuclearExcitation(G4double incidentKineticEnergy,
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| 183 | G4double atomicWeight,
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| 184 | G4double atomicNumber,
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| 185 | G4double& excitationEnergyGPN,
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| 186 | G4double& excitationEnergyDTA)
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| 187 | {
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| 188 | G4double neutronMass = Neutron.getMass();
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| 189 | G4double electronMass = 0.000511;
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| 190 | G4double exnu = 0.;
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| 191 | excitationEnergyGPN = 0.;
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| 192 | excitationEnergyDTA = 0.;
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| 193 |
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| 194 | if (atomicWeight > (neutronMass + 2.*electronMass))
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| 195 | {
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| 196 | G4int magic = ((G4int)(atomicNumber+0.1) == 82) ? 1 : 0;
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| 197 | G4double ekin = Amin(Amax(incidentKineticEnergy, 0.1), 4.);
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| 198 | G4double cfa = Amax(0.35 +((0.35 - 0.05)/2.3)*std::log(ekin), 0.15);
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| 199 | exnu = 7.716*cfa*std::exp(-cfa);
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| 200 | G4double atno = Amin(atomicWeight, 120.);
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| 201 | cfa = ((atno - 1.)/120.) * std::exp(-(atno-1.)/120.);
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| 202 | exnu = exnu * cfa;
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| 203 | G4double fpdiv = Amax(1.-0.25*ekin*ekin, 0.5);
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| 204 | G4double gfa = 2.*((atomicWeight-1.)/70.)
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| 205 | * std::exp(-(atomicWeight-1.)/70.);
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| 206 |
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| 207 | excitationEnergyGPN = exnu * fpdiv;
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| 208 | excitationEnergyDTA = exnu - excitationEnergyGPN;
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| 209 |
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| 210 | G4double ran1 = 0., ran2 = 0.;
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| 211 | if (!magic)
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| 212 | { ran1 = normal();
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| 213 | ran2 = normal();
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| 214 | }
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| 215 | excitationEnergyGPN = Amax(excitationEnergyGPN*(1.+ran1*gfa),0.);
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| 216 | excitationEnergyDTA = Amax(excitationEnergyDTA*(1.+ran2*gfa),0.);
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| 217 | exnu = excitationEnergyGPN + excitationEnergyDTA;
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| 218 | if(verboseLevel > 1) {
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| 219 | G4cout << " NuclearExcitation: " << magic << " " << ekin
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| 220 | << " " << cfa << " " << atno << " " << fpdiv << " "
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| 221 | << gfa << " " << excitationEnergyGPN
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| 222 | << " " << excitationEnergyDTA << G4endl;
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| 223 | }
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| 224 |
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| 225 | while (exnu >= incidentKineticEnergy)
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| 226 | {
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| 227 | excitationEnergyGPN *= (1. - 0.5*normal());
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| 228 | excitationEnergyDTA *= (1. - 0.5*normal());
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| 229 | exnu = excitationEnergyGPN + excitationEnergyDTA;
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| 230 | }
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| 231 | }
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| 232 | return exnu;
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| 233 | }
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| 234 |
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| 235 | G4double
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| 236 | G4HEInelastic::pmltpc(G4int np, G4int nm, G4int nz, G4int n,
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| 237 | G4double b, G4double c)
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| 238 | {
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| 239 | G4double expxu = std::log(MAXFLOAT);
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| 240 | G4double expxl = -expxu;
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| 241 | G4int i;
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| 242 | G4double npf = 0.0, nmf = 0.0, nzf = 0.0;
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| 243 | for(i=2;i<=np;i++) npf += std::log((G4double)i);
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| 244 | for(i=2;i<=nm;i++) nmf += std::log((G4double)i);
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| 245 | for(i=2;i<=nz;i++) nzf += std::log((G4double)i);
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| 246 | G4double r = Amin(expxu,Amax(expxl,-(np-nm+nz+b)*(np-nm+nz+b)/(2*c*c*n*n)-npf-nmf-nzf));
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| 247 | return std::exp(r);
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| 248 | }
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| 249 |
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| 250 |
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| 251 | G4int G4HEInelastic::Factorial(G4int n)
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| 252 | {
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| 253 | G4int result = 1;
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| 254 | if (n < 0) G4Exception("G4HEInelastic::Factorial()", "601",
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| 255 | FatalException, "Negative factorial argument");
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| 256 | while (n > 1) result *= n--;
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| 257 | return result;
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| 258 | }
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| 259 |
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| 260 |
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| 261 | G4double G4HEInelastic::normal()
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| 262 | {
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| 263 | G4double ran = -6.0;
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| 264 | for(G4int i=0; i<12; i++) ran += G4UniformRand();
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| 265 | return ran;
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| 266 | }
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| 267 |
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| 268 | G4int G4HEInelastic::Poisson( G4double x )
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| 269 | {
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| 270 | G4int i, iran = 0;
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| 271 | G4double ran;
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| 272 | if ( x > 9.9 )
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| 273 | {
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| 274 | iran = G4int( Amax( 0.0, x + normal() * std::sqrt( x ) ) );
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| 275 | }
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| 276 | else
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| 277 | {
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| 278 | G4int mm = G4int( 5.0 * x );
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| 279 | if ( mm <= 0 )
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| 280 | {
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| 281 | G4double p1 = x * std::exp( -x );
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| 282 | G4double p2 = x * p1/2.;
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| 283 | G4double p3 = x * p2/3.;
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| 284 | ran = G4UniformRand();
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| 285 | if ( ran < p3 ) iran = 3;
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| 286 | else if ( ran < p2 ) iran = 2;
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| 287 | else if ( ran < p1 ) iran = 1;
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| 288 | }
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| 289 | else
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| 290 | { G4double r = std::exp( -x );
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| 291 | ran = G4UniformRand();
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| 292 | if (ran > r)
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| 293 | {
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| 294 | G4double rrr;
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| 295 | G4double rr = r;
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| 296 | for (i=1; i <= mm; i++)
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| 297 | {
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| 298 | iran++;
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| 299 | if ( i > 5 ) rrr = std::exp(i*std::log(x)-(i+0.5)*std::log((G4double)i)+i-0.9189385);
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| 300 | else rrr = std::pow(x,i)*Factorial(i);
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| 301 | rr += r * rrr;
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| 302 | if (ran <= rr) break;
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| 303 | }
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| 304 | }
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| 305 | }
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| 306 | }
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| 307 | return iran;
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| 308 | }
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| 309 | G4double
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| 310 | G4HEInelastic::GammaRand( G4double avalue )
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| 311 | {
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| 312 | G4double ga = avalue -1.;
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| 313 | G4double la = std::sqrt(2.*avalue - 1.);
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| 314 | G4double ep = 1.570796327 + std::atan(ga/la);
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| 315 | G4double ro = 1.570796327 - ep;
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| 316 | G4double y = 1.;
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| 317 | G4double xtrial;
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| 318 | repeat:
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| 319 | xtrial = ga + la * std::tan(ep*G4UniformRand() + ro);
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| 320 | if(xtrial == 0.) goto repeat;
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| 321 | y = std::log(1.+sqr((xtrial-ga)/la))+ga*std::log(xtrial/ga)-xtrial+ga;
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| 322 | if(std::log(G4UniformRand()) > y) goto repeat;
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| 323 | return xtrial;
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| 324 | }
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| 325 | G4double
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| 326 | G4HEInelastic::Erlang( G4int mvalue )
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| 327 | {
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| 328 | G4double ran = G4UniformRand();
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| 329 | G4double xtrial = 0.62666*std::log((1.+ran)/(1.-ran));
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| 330 | if(G4UniformRand()<0.5) xtrial = -xtrial;
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| 331 | return mvalue+xtrial*std::sqrt(G4double(mvalue));
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| 332 | }
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| 333 |
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| 334 | void
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| 335 | G4HEInelastic::StrangeParticlePairProduction(
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| 336 | const G4double availableEnergy,
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| 337 | const G4double centerOfMassEnergy,
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| 338 | G4HEVector pv[],
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| 339 | G4int &vecLen,
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| 340 | G4HEVector incidentParticle,
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| 341 | G4HEVector targetParticle )
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| 342 |
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| 343 | // Choose charge combinations K+ K-, K+ K0, K0 K0, K0 K-,
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| 344 | // K+ Y0, K0 Y+, K0 Y-
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| 345 | // For antibaryon induced reactions half of the cross sections KB YB
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| 346 | // pairs are produced. Charge is not conserved, no experimental data
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| 347 | // available for exclusive reactions, therefore some average behavior
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| 348 | // assumed. The ratio L/SIGMA is taken as 3:1 (from experimental low
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| 349 | // energy data)
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| 350 |
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| 351 | {
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| 352 | static G4double avrs[] = {3.,4.,5.,6.,7.,8.,9.,10.,20.,30.,40.,50.};
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| 353 | static G4double avkkb[] = {0.0015,0.0050,0.0120,0.0285,0.0525,0.0750,0.0975,
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| 354 | 0.1230,0.2800,0.3980,0.4950,0.5730};
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| 355 | static G4double kkb[] = {0.2500,0.3750,0.5000,0.5625,0.6250,0.6875,0.7500,
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| 356 | 0.8750,1.0000};
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| 357 | static G4double ky[] = {0.2000,0.3000,0.4000,0.5500,0.6250,0.7000,0.8000,
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| 358 | 0.8500,0.9000,0.9500,0.9750,1.0000};
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| 359 | static G4int ipakkb[] = {10,13,10,11,10,12,11,11,11,12,12,11,12,12,
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| 360 | 11,13,12,13};
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| 361 | static G4int ipaky[] = {18,10,18,11,18,12,20,10,20,11,20,12,21,10,
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| 362 | 21,11,21,12,22,10,22,11,22,12};
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| 363 | static G4int ipakyb[] = {19,13,19,12,19,11,23,13,23,12,23,11,24,13,
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| 364 | 24,12,24,11,25,13,25,12,25,11};
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| 365 | static G4double avky[] = {0.0050,0.0300,0.0640,0.0950,0.1150,0.1300,0.1450,
|
|---|
| 366 | 0.1550,0.2000,0.2050,0.2100,0.2120};
|
|---|
| 367 | static G4double avnnb[] ={0.00001,0.0001,0.0006,0.0025,0.0100,0.0200,0.0400,
|
|---|
| 368 | 0.0500,0.1200,0.1500,0.1800,0.2000};
|
|---|
| 369 |
|
|---|
| 370 | G4int i, ibin, i3, i4; // misc. local variables
|
|---|
| 371 | G4double avk, avy, avn, ran;
|
|---|
| 372 |
|
|---|
| 373 | G4double protonMass = Proton.getMass();
|
|---|
| 374 | G4double sigmaMinusMass = SigmaMinus.getMass();
|
|---|
| 375 | G4int antiprotonCode = AntiProton.getCode();
|
|---|
| 376 | G4int antineutronCode = AntiNeutron.getCode();
|
|---|
| 377 | G4int antilambdaCode = AntiLambda.getCode();
|
|---|
| 378 |
|
|---|
| 379 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 380 | G4int incidentCode = incidentParticle.getCode();
|
|---|
| 381 |
|
|---|
| 382 | G4double targetMass = targetParticle.getMass();
|
|---|
| 383 |
|
|---|
| 384 | // protection against annihilation processes like pbar p -> pi pi.
|
|---|
| 385 |
|
|---|
| 386 | if (vecLen <= 2) return;
|
|---|
| 387 |
|
|---|
| 388 | // determine the center of mass energy bin
|
|---|
| 389 |
|
|---|
| 390 | i = 1;
|
|---|
| 391 | while ( (i<12) && (centerOfMassEnergy > avrs[i]) )i++;
|
|---|
| 392 | if ( i == 12 ) ibin = 11;
|
|---|
| 393 | else ibin = i;
|
|---|
| 394 |
|
|---|
| 395 | // the fortran code chooses a random replacement of produced kaons
|
|---|
| 396 | // but does not take into account charge conservation
|
|---|
| 397 |
|
|---|
| 398 | if( vecLen == 3 ) { // we know that vecLen > 2
|
|---|
| 399 | i3 = 2;
|
|---|
| 400 | i4 = 3; // note that we will be adding a new
|
|---|
| 401 | } // secondary particle in this case only
|
|---|
| 402 | else
|
|---|
| 403 | { // otherwise 2 <= i3,i4 <= vecLen
|
|---|
| 404 | i4 = i3 = 2 + G4int( (vecLen-2)*G4UniformRand() );
|
|---|
| 405 | while ( i3 == i4 ) i4 = 2 + G4int( (vecLen-2)*G4UniformRand() );
|
|---|
| 406 | }
|
|---|
| 407 |
|
|---|
| 408 | // use linear interpolation or extrapolation by y=centerofmassEnergy*x+b
|
|---|
| 409 |
|
|---|
| 410 | avk = (std::log(avkkb[ibin])-std::log(avkkb[ibin-1]))*(centerOfMassEnergy-avrs[ibin-1])
|
|---|
| 411 | /(avrs[ibin]-avrs[ibin-1]) + std::log(avkkb[ibin-1]);
|
|---|
| 412 | avk = std::exp(avk);
|
|---|
| 413 |
|
|---|
| 414 | avy = (std::log(avky[ibin])-std::log(avky[ibin-1]))*(centerOfMassEnergy-avrs[ibin-1])
|
|---|
| 415 | /(avrs[ibin]-avrs[ibin-1]) + std::log(avky[ibin-1]);
|
|---|
| 416 | avy = std::exp(avy);
|
|---|
| 417 |
|
|---|
| 418 | avn = (std::log(avnnb[ibin])-std::log(avnnb[ibin-1]))*(centerOfMassEnergy-avrs[ibin-1])
|
|---|
| 419 | /(avrs[ibin]-avrs[ibin-1]) + std::log(avnnb[ibin-1]);
|
|---|
| 420 | avn = std::exp(avn);
|
|---|
| 421 |
|
|---|
| 422 | if ( avk+avy+avn <= 0.0 ) return;
|
|---|
| 423 |
|
|---|
| 424 | if ( incidentMass < protonMass ) avy /= 2.0;
|
|---|
| 425 | avy += avk+avn;
|
|---|
| 426 | avk += avn;
|
|---|
| 427 |
|
|---|
| 428 | ran = G4UniformRand();
|
|---|
| 429 | if ( ran < avn )
|
|---|
| 430 | { // p pbar && n nbar production
|
|---|
| 431 | if ( availableEnergy < 2.0) return;
|
|---|
| 432 | if ( vecLen == 3 )
|
|---|
| 433 | { // add a new secondary
|
|---|
| 434 | if ( G4UniformRand() < 0.5 )
|
|---|
| 435 | {
|
|---|
| 436 | pv[i3] = Neutron;;
|
|---|
| 437 | pv[vecLen++] = AntiNeutron;
|
|---|
| 438 | }
|
|---|
| 439 | else
|
|---|
| 440 | {
|
|---|
| 441 | pv[i3] = Proton;
|
|---|
| 442 | pv[vecLen++] = AntiProton;
|
|---|
| 443 | }
|
|---|
| 444 | }
|
|---|
| 445 | else
|
|---|
| 446 | { // replace two secondaries
|
|---|
| 447 | if ( G4UniformRand() < 0.5 )
|
|---|
| 448 | {
|
|---|
| 449 | pv[i3] = Neutron;
|
|---|
| 450 | pv[i4] = AntiNeutron;
|
|---|
| 451 | }
|
|---|
| 452 | else
|
|---|
| 453 | {
|
|---|
| 454 | pv[i3] = Proton;
|
|---|
| 455 | pv[i4] = AntiProton;
|
|---|
| 456 | }
|
|---|
| 457 | }
|
|---|
| 458 | }
|
|---|
| 459 | else if ( ran < avk )
|
|---|
| 460 | { // K Kbar production
|
|---|
| 461 | if ( availableEnergy < 1.0) return;
|
|---|
| 462 | G4double ran1 = G4UniformRand();
|
|---|
| 463 | i = 0;
|
|---|
| 464 | while( (i<9) && (ran1>kkb[i]) )i++;
|
|---|
| 465 | if ( i == 9 ) return;
|
|---|
| 466 |
|
|---|
| 467 | // ipakkb[] = { 10,13, 10,11, 10,12, 11, 11, 11,12, 12,11, 12,12, 11,13, 12,13 };
|
|---|
| 468 | // charge K+ K- K+ K0S K+ K0L K0S K0S K0S K0L K0LK0S K0LK0L K0S K- K0LK-
|
|---|
| 469 |
|
|---|
| 470 | switch( ipakkb[i*2] )
|
|---|
| 471 | {
|
|---|
| 472 | case 10: pv[i3] = KaonPlus; break;
|
|---|
| 473 | case 11: pv[i3] = KaonZeroShort;break;
|
|---|
| 474 | case 12: pv[i3] = KaonZeroLong; break;
|
|---|
| 475 | case 13: pv[i3] = KaonMinus; break;
|
|---|
| 476 | }
|
|---|
| 477 |
|
|---|
| 478 | if( vecLen == 2 )
|
|---|
| 479 | { // add a secondary
|
|---|
| 480 | switch( ipakkb[i*2+1] )
|
|---|
| 481 | {
|
|---|
| 482 | case 10: pv[vecLen++] = KaonPlus; break;
|
|---|
| 483 | case 11: pv[vecLen++] = KaonZeroShort;break;
|
|---|
| 484 | case 12: pv[vecLen++] = KaonZeroLong; break;
|
|---|
| 485 | case 13: pv[vecLen++] = KaonMinus; break;
|
|---|
| 486 | }
|
|---|
| 487 | }
|
|---|
| 488 | else
|
|---|
| 489 | { // replace
|
|---|
| 490 | switch( ipakkb[i*2+1] )
|
|---|
| 491 | {
|
|---|
| 492 | case 10: pv[i4] = KaonPlus; break;
|
|---|
| 493 | case 11: pv[i4] = KaonZeroShort;break;
|
|---|
| 494 | case 12: pv[i4] = KaonZeroLong; break;
|
|---|
| 495 | case 13: pv[i4] = KaonMinus; break;
|
|---|
| 496 | }
|
|---|
| 497 | }
|
|---|
| 498 | }
|
|---|
| 499 | else if ( ran < avy )
|
|---|
| 500 | { // Lambda K && Sigma K
|
|---|
| 501 | if( availableEnergy < 1.6) return;
|
|---|
| 502 | G4double ran1 = G4UniformRand();
|
|---|
| 503 | i = 0;
|
|---|
| 504 | while( (i<12) && (ran1>ky[i]) )i++;
|
|---|
| 505 | if ( i == 12 ) return;
|
|---|
| 506 | if ( (incidentMass<protonMass) || (G4UniformRand()<0.5) )
|
|---|
| 507 | {
|
|---|
| 508 |
|
|---|
| 509 | // ipaky[] = { 18,10, 18,11, 18,12, 20,10, 20,11, 20,12,
|
|---|
| 510 | // L0 K+ L0 K0S L0 K0L S+ K+ S+ K0S S+ K0L
|
|---|
| 511 | //
|
|---|
| 512 | // 21,10, 21,11, 21,12, 22,10, 22,11, 22,12 }
|
|---|
| 513 | // S0 K+ S0 K0S S0 K0L S- K+ S- K0S S- K0L
|
|---|
| 514 |
|
|---|
| 515 | switch( ipaky[i*2] )
|
|---|
| 516 | {
|
|---|
| 517 | case 18: pv[1] = Lambda; break;
|
|---|
| 518 | case 20: pv[1] = SigmaPlus; break;
|
|---|
| 519 | case 21: pv[1] = SigmaZero; break;
|
|---|
| 520 | case 22: pv[1] = SigmaMinus;break;
|
|---|
| 521 | }
|
|---|
| 522 | switch( ipaky[i*2+1] )
|
|---|
| 523 | {
|
|---|
| 524 | case 10: pv[i3] = KaonPlus; break;
|
|---|
| 525 | case 11: pv[i3] = KaonZeroShort;break;
|
|---|
| 526 | case 12: pv[i3] = KaonZeroLong; break;
|
|---|
| 527 | }
|
|---|
| 528 | }
|
|---|
| 529 | else
|
|---|
| 530 | { // Lbar K && Sigmabar K production
|
|---|
| 531 |
|
|---|
| 532 | // ipakyb[] = { 19,13, 19,12, 19,11, 23,13, 23,12, 23,11,
|
|---|
| 533 | // Lb K- Lb K0L Lb K0S S+b K- S+b K0L S+b K0S
|
|---|
| 534 | // 24,13, 24,12, 24,11, 25,13, 25,12, 25,11 };
|
|---|
| 535 | // S0b K- S0BK0L S0BK0S S-BK- S-B K0L S-BK0S
|
|---|
| 536 |
|
|---|
| 537 | if( (incidentCode==antiprotonCode) || (incidentCode==antineutronCode) ||
|
|---|
| 538 | (incidentCode==antilambdaCode) || (incidentMass>sigmaMinusMass) )
|
|---|
| 539 | {
|
|---|
| 540 | switch( ipakyb[i*2] )
|
|---|
| 541 | {
|
|---|
| 542 | case 19:pv[0] = AntiLambda; break;
|
|---|
| 543 | case 23:pv[0] = AntiSigmaPlus; break;
|
|---|
| 544 | case 24:pv[0] = AntiSigmaZero; break;
|
|---|
| 545 | case 25:pv[0] = AntiSigmaMinus;break;
|
|---|
| 546 | }
|
|---|
| 547 | switch( ipakyb[i*2+1] )
|
|---|
| 548 | {
|
|---|
| 549 | case 11:pv[i3] = KaonZeroShort;break;
|
|---|
| 550 | case 12:pv[i3] = KaonZeroLong; break;
|
|---|
| 551 | case 13:pv[i3] = KaonMinus; break;
|
|---|
| 552 | }
|
|---|
| 553 | }
|
|---|
| 554 | else
|
|---|
| 555 | {
|
|---|
| 556 | switch( ipaky[i*2] )
|
|---|
| 557 | {
|
|---|
| 558 | case 18:pv[0] = Lambda; break;
|
|---|
| 559 | case 20:pv[0] = SigmaPlus; break;
|
|---|
| 560 | case 21:pv[0] = SigmaZero; break;
|
|---|
| 561 | case 22:pv[0] = SigmaMinus;break;
|
|---|
| 562 | }
|
|---|
| 563 | switch( ipaky[i*2+1] )
|
|---|
| 564 | {
|
|---|
| 565 | case 10: pv[i3] = KaonPlus; break;
|
|---|
| 566 | case 11: pv[i3] = KaonZeroShort;break;
|
|---|
| 567 | case 12: pv[i3] = KaonZeroLong; break;
|
|---|
| 568 | }
|
|---|
| 569 | }
|
|---|
| 570 | }
|
|---|
| 571 | }
|
|---|
| 572 | else
|
|---|
| 573 | return;
|
|---|
| 574 |
|
|---|
| 575 | // check the available energy
|
|---|
| 576 | // if there is not enough energy for kkb/ky pair production
|
|---|
| 577 | // then reduce the number of secondary particles
|
|---|
| 578 | // NOTE:
|
|---|
| 579 | // the number of secondaries may have been changed
|
|---|
| 580 | // the incident and/or target particles may have changed
|
|---|
| 581 | // charge conservation is ignored (as well as strangness conservation)
|
|---|
| 582 |
|
|---|
| 583 | incidentMass = incidentParticle.getMass();
|
|---|
| 584 | targetMass = targetParticle.getMass();
|
|---|
| 585 |
|
|---|
| 586 | G4double energyCheck = centerOfMassEnergy-(incidentMass+targetMass);
|
|---|
| 587 | if (verboseLevel > 1) G4cout << "Particles produced: " ;
|
|---|
| 588 |
|
|---|
| 589 | for ( i=0; i < vecLen; i++ )
|
|---|
| 590 | {
|
|---|
| 591 | energyCheck -= pv[i].getMass();
|
|---|
| 592 | if (verboseLevel > 1) G4cout << pv[i].getCode() << " " ;
|
|---|
| 593 | if( energyCheck < 0.0 )
|
|---|
| 594 | {
|
|---|
| 595 | if( i > 0 ) vecLen = --i; // chop off the secondary list
|
|---|
| 596 | return;
|
|---|
| 597 | }
|
|---|
| 598 | }
|
|---|
| 599 | if (verboseLevel > 1) G4cout << G4endl;
|
|---|
| 600 | return;
|
|---|
| 601 | }
|
|---|
| 602 |
|
|---|
| 603 | void
|
|---|
| 604 | G4HEInelastic::HighEnergyCascading(G4bool &successful,
|
|---|
| 605 | G4HEVector pv[],
|
|---|
| 606 | G4int &vecLen,
|
|---|
| 607 | G4double &excitationEnergyGNP,
|
|---|
| 608 | G4double &excitationEnergyDTA,
|
|---|
| 609 | G4HEVector incidentParticle,
|
|---|
| 610 | G4HEVector targetParticle,
|
|---|
| 611 | G4double atomicWeight,
|
|---|
| 612 | G4double atomicNumber)
|
|---|
| 613 | {
|
|---|
| 614 | //
|
|---|
| 615 | // The multiplicity of particles produced in the first interaction has been
|
|---|
| 616 | // calculated in one of the FirstIntInNuc.... routines. The nuclear
|
|---|
| 617 | // cascading particles are parameterized from experimental data.
|
|---|
| 618 | // A simple single variable description E D3S/DP3= F(Q) with
|
|---|
| 619 | // Q^2 = (M*X)^2 + PT^2 is used. Final state kinematics are produced
|
|---|
| 620 | // by an FF-type iterative cascade method.
|
|---|
| 621 | // Nuclear evaporation particles are added at the end of the routine.
|
|---|
| 622 |
|
|---|
| 623 | // All quantities in the G4HEVector Array pv are in GeV- units.
|
|---|
| 624 | // The method is a copy of MediumEnergyCascading with some special tuning
|
|---|
| 625 | // for high energy interactions.
|
|---|
| 626 |
|
|---|
| 627 |
|
|---|
| 628 | G4int protonCode = Proton.getCode();
|
|---|
| 629 | G4double protonMass = Proton.getMass();
|
|---|
| 630 | G4int neutronCode = Neutron.getCode();
|
|---|
| 631 | G4double neutronMass = Neutron.getMass();
|
|---|
| 632 | G4double kaonPlusMass = KaonPlus.getMass();
|
|---|
| 633 | G4int kaonPlusCode = KaonPlus.getCode();
|
|---|
| 634 | G4int kaonMinusCode = KaonMinus.getCode();
|
|---|
| 635 | G4int kaonZeroSCode = KaonZeroShort.getCode();
|
|---|
| 636 | G4int kaonZeroLCode = KaonZeroLong.getCode();
|
|---|
| 637 | G4int kaonZeroCode = KaonZero.getCode();
|
|---|
| 638 | G4int antiKaonZeroCode = AntiKaonZero.getCode();
|
|---|
| 639 | G4int pionPlusCode = PionPlus.getCode();
|
|---|
| 640 | G4int pionZeroCode = PionZero.getCode();
|
|---|
| 641 | G4int pionMinusCode = PionMinus.getCode();
|
|---|
| 642 | G4String mesonType = PionPlus.getType();
|
|---|
| 643 | G4String baryonType = Proton.getType();
|
|---|
| 644 | G4String antiBaryonType= AntiProton.getType();
|
|---|
| 645 |
|
|---|
| 646 | G4double targetMass = targetParticle.getMass();
|
|---|
| 647 |
|
|---|
| 648 | G4int incidentCode = incidentParticle.getCode();
|
|---|
| 649 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 650 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 651 | G4double incidentEnergy = incidentParticle.getEnergy();
|
|---|
| 652 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 653 | G4String incidentType = incidentParticle.getType();
|
|---|
| 654 | // G4double incidentTOF = incidentParticle.getTOF();
|
|---|
| 655 | G4double incidentTOF = 0.;
|
|---|
| 656 |
|
|---|
| 657 | // some local variables
|
|---|
| 658 |
|
|---|
| 659 | G4int i, j, l;
|
|---|
| 660 |
|
|---|
| 661 | if (verboseLevel > 1)
|
|---|
| 662 | G4cout << " G4HEInelastic::HighEnergyCascading " << G4endl;
|
|---|
| 663 | successful = false;
|
|---|
| 664 | if(incidentTotalMomentum < 25. + G4UniformRand()*25.) return;
|
|---|
| 665 |
|
|---|
| 666 | // define annihilation channels.
|
|---|
| 667 |
|
|---|
| 668 | G4bool annihilation = false;
|
|---|
| 669 | if (incidentCode < 0 && incidentType == antiBaryonType &&
|
|---|
| 670 | pv[0].getType() != antiBaryonType &&
|
|---|
| 671 | pv[1].getType() != antiBaryonType )
|
|---|
| 672 | {
|
|---|
| 673 | annihilation = true;
|
|---|
| 674 | }
|
|---|
| 675 |
|
|---|
| 676 |
|
|---|
| 677 |
|
|---|
| 678 | G4double twsup[] = { 1., 1., 0.7, 0.5, 0.3, 0.2, 0.1, 0.0 };
|
|---|
| 679 |
|
|---|
| 680 | if( annihilation ) goto start;
|
|---|
| 681 | if( vecLen >= 8) goto start;
|
|---|
| 682 | if( incidentKineticEnergy < 1.) return;
|
|---|
| 683 | if( ( incidentCode == kaonPlusCode || incidentCode == kaonMinusCode
|
|---|
| 684 | || incidentCode == kaonZeroCode || incidentCode == antiKaonZeroCode
|
|---|
| 685 | || incidentCode == kaonZeroSCode || incidentCode == kaonZeroLCode )
|
|---|
| 686 | && ( G4UniformRand() < 0.5) ) goto start;
|
|---|
| 687 | if( G4UniformRand() > twsup[vecLen-1]) goto start;
|
|---|
| 688 | if( incidentKineticEnergy > (G4UniformRand()*200 + 50.) ) goto start;
|
|---|
| 689 | return;
|
|---|
| 690 |
|
|---|
| 691 | start:
|
|---|
| 692 |
|
|---|
| 693 | if (annihilation)
|
|---|
| 694 | { // do some corrections of incident particle kinematic
|
|---|
| 695 | G4double ekcor = Amax( 1., 1./incidentKineticEnergy);
|
|---|
| 696 | incidentKineticEnergy = 2*targetMass + incidentKineticEnergy*(1.+ekcor/atomicWeight);
|
|---|
| 697 | G4double excitation = NuclearExcitation(incidentKineticEnergy,
|
|---|
| 698 | atomicWeight,
|
|---|
| 699 | atomicNumber,
|
|---|
| 700 | excitationEnergyGNP,
|
|---|
| 701 | excitationEnergyDTA);
|
|---|
| 702 | incidentKineticEnergy -= excitation;
|
|---|
| 703 | if (incidentKineticEnergy < excitationEnergyDTA) incidentKineticEnergy = 0.;
|
|---|
| 704 | incidentEnergy = incidentKineticEnergy + incidentMass;
|
|---|
| 705 | incidentTotalMomentum =
|
|---|
| 706 | std::sqrt( Amax(0., incidentEnergy*incidentEnergy - incidentMass*incidentMass));
|
|---|
| 707 | }
|
|---|
| 708 |
|
|---|
| 709 | G4HEVector pTemp;
|
|---|
| 710 | for (i = 2; i<vecLen; i++)
|
|---|
| 711 | {
|
|---|
| 712 | j = Imin( vecLen-1, (G4int)(2. + G4UniformRand()*(vecLen - 2)));
|
|---|
| 713 | pTemp = pv[j];
|
|---|
| 714 | pv[j] = pv[i];
|
|---|
| 715 | pv[i] = pTemp;
|
|---|
| 716 | }
|
|---|
| 717 | // randomize the first two leading particles
|
|---|
| 718 | // for kaon induced reactions only
|
|---|
| 719 | // (need from experimental data)
|
|---|
| 720 |
|
|---|
| 721 | if( (incidentCode==kaonPlusCode || incidentCode==kaonMinusCode ||
|
|---|
| 722 | incidentCode==kaonZeroCode || incidentCode==antiKaonZeroCode ||
|
|---|
| 723 | incidentCode==kaonZeroSCode || incidentCode==kaonZeroLCode)
|
|---|
| 724 | && (G4UniformRand() > 0.9) )
|
|---|
| 725 | {
|
|---|
| 726 | pTemp = pv[1];
|
|---|
| 727 | pv[1] = pv[0];
|
|---|
| 728 | pv[0] = pTemp;
|
|---|
| 729 | }
|
|---|
| 730 | // mark leading particles for incident strange particles
|
|---|
| 731 | // and antibaryons, for all other we assume that the first
|
|---|
| 732 | // and second particle are the leading particles.
|
|---|
| 733 | // We need this later for kinematic aspects of strangeness
|
|---|
| 734 | // conservation.
|
|---|
| 735 |
|
|---|
| 736 | G4int lead = 0;
|
|---|
| 737 | G4HEVector leadParticle;
|
|---|
| 738 | if( (incidentMass >= kaonPlusMass-0.05) && (incidentCode != protonCode)
|
|---|
| 739 | && (incidentCode != neutronCode) )
|
|---|
| 740 | {
|
|---|
| 741 | G4double pMass = pv[0].getMass();
|
|---|
| 742 | G4int pCode = pv[0].getCode();
|
|---|
| 743 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 744 | && (pCode != neutronCode) )
|
|---|
| 745 | {
|
|---|
| 746 | lead = pCode;
|
|---|
| 747 | leadParticle = pv[0];
|
|---|
| 748 | }
|
|---|
| 749 | else
|
|---|
| 750 | {
|
|---|
| 751 | pMass = pv[1].getMass();
|
|---|
| 752 | pCode = pv[1].getCode();
|
|---|
| 753 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 754 | && (pCode != neutronCode) )
|
|---|
| 755 | {
|
|---|
| 756 | lead = pCode;
|
|---|
| 757 | leadParticle = pv[1];
|
|---|
| 758 | }
|
|---|
| 759 | }
|
|---|
| 760 | }
|
|---|
| 761 |
|
|---|
| 762 | // Distribute particles in forward and backward hemispheres in center
|
|---|
| 763 | // of mass system. Incident particle goes in forward hemisphere.
|
|---|
| 764 |
|
|---|
| 765 | G4HEVector pvI = incidentParticle; // for the incident particle
|
|---|
| 766 | pvI.setSide( 1 );
|
|---|
| 767 |
|
|---|
| 768 | G4HEVector pvT = targetParticle; // for the target particle
|
|---|
| 769 | pvT.setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 770 | pvT.setSide( -1 );
|
|---|
| 771 | pvT.setTOF( -1.);
|
|---|
| 772 |
|
|---|
| 773 |
|
|---|
| 774 | G4double centerOfMassEnergy = std::sqrt( sqr(incidentMass)+sqr(targetMass)
|
|---|
| 775 | +2.0*targetMass*incidentEnergy );
|
|---|
| 776 | // G4double availableEnergy = centerOfMassEnergy - ( targetMass + incidentMass );
|
|---|
| 777 |
|
|---|
| 778 | G4double tavai1 = centerOfMassEnergy/2.0 - incidentMass;
|
|---|
| 779 | G4double tavai2 = centerOfMassEnergy/2.0 - targetMass;
|
|---|
| 780 |
|
|---|
| 781 | // define G4HEVector- array for kinematic manipulations,
|
|---|
| 782 | // with a one by one correspondence to the pv-Array.
|
|---|
| 783 |
|
|---|
| 784 | G4int ntb = 1;
|
|---|
| 785 | for( i=0; i < vecLen; i++ )
|
|---|
| 786 | {
|
|---|
| 787 | if (i == 0) pv[i].setSide( 1 );
|
|---|
| 788 | else if (i == 1) pv[i].setSide( -1 );
|
|---|
| 789 | else
|
|---|
| 790 | { if( G4UniformRand() < 0.5 )
|
|---|
| 791 | {
|
|---|
| 792 | pv[i].setSide( -1 );
|
|---|
| 793 | ntb++;
|
|---|
| 794 | }
|
|---|
| 795 | else
|
|---|
| 796 | pv[i].setSide( 1 );
|
|---|
| 797 | }
|
|---|
| 798 | pv[i].setTOF( incidentTOF);
|
|---|
| 799 | }
|
|---|
| 800 | G4double tb = 2. * ntb;
|
|---|
| 801 | if (centerOfMassEnergy < (2. + G4UniformRand()))
|
|---|
| 802 | tb = (2. * ntb + vecLen)/2.;
|
|---|
| 803 |
|
|---|
| 804 | if (verboseLevel > 1)
|
|---|
| 805 | { G4cout << " pv Vector after Randomization " << vecLen << G4endl;
|
|---|
| 806 | pvI.Print(-1);
|
|---|
| 807 | pvT.Print(-1);
|
|---|
| 808 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 809 | }
|
|---|
| 810 |
|
|---|
| 811 | // Add particles from intranuclear cascade
|
|---|
| 812 | // nuclearCascadeCount = number of new secondaries produced by nuclear
|
|---|
| 813 | // cascading.
|
|---|
| 814 | // extraCount = number of nucleons within these new secondaries
|
|---|
| 815 |
|
|---|
| 816 | G4double s, xtarg, ran;
|
|---|
| 817 | s = centerOfMassEnergy*centerOfMassEnergy;
|
|---|
| 818 | G4double afc;
|
|---|
| 819 | afc = Amin(0.5, 0.312 + 0.200 * std::log(std::log(s))+ std::pow(s,1.5)/6000.0);
|
|---|
| 820 | xtarg = Amax(0.01, afc * (std::pow(atomicWeight, 0.33) - 1.0) * tb);
|
|---|
| 821 | G4int nstran = Poisson( 0.03*xtarg);
|
|---|
| 822 | G4int momentumBin = 0;
|
|---|
| 823 | G4double nucsup[] = { 1.00, 0.7, 0.5, 0.4, 0.5, 0.5 };
|
|---|
| 824 | G4double psup[] = { 3., 6., 20., 50., 100., 1000. };
|
|---|
| 825 | while( (momentumBin < 6) && (incidentTotalMomentum > psup[momentumBin])) momentumBin++;
|
|---|
| 826 | momentumBin = Imin(5, momentumBin);
|
|---|
| 827 | G4double xpnhmf = Amax(0.01,xtarg*nucsup[momentumBin]);
|
|---|
| 828 | G4double xshhmf = Amax(0.01,xtarg - xpnhmf);
|
|---|
| 829 | G4double rshhmf = 0.25*xshhmf;
|
|---|
| 830 | G4double rpnhmf = 0.81*xpnhmf;
|
|---|
| 831 | G4double xhmf=0;
|
|---|
| 832 | if(verboseLevel > 1)
|
|---|
| 833 | G4cout << "xtarg= " << xtarg << " xpnhmf = " << xpnhmf << G4endl;
|
|---|
| 834 |
|
|---|
| 835 | G4int nshhmf, npnhmf;
|
|---|
| 836 | if (rshhmf > 1.1)
|
|---|
| 837 | {
|
|---|
| 838 | rshhmf = xshhmf/(rshhmf-1.);
|
|---|
| 839 | if (rshhmf <= 20.)
|
|---|
| 840 | xhmf = GammaRand( rshhmf );
|
|---|
| 841 | else
|
|---|
| 842 | xhmf = Erlang( G4int(rshhmf+0.5) );
|
|---|
| 843 | xshhmf *= xhmf/rshhmf;
|
|---|
| 844 | }
|
|---|
| 845 | nshhmf = Poisson( xshhmf );
|
|---|
| 846 | if(verboseLevel > 1)
|
|---|
| 847 | G4cout << "xshhmf = " << xshhmf << " xhmf = " << xhmf
|
|---|
| 848 | << " rshhmf = " << rshhmf << G4endl;
|
|---|
| 849 |
|
|---|
| 850 | if (rpnhmf > 1.1)
|
|---|
| 851 | {
|
|---|
| 852 | rpnhmf = xpnhmf/(rpnhmf -1.);
|
|---|
| 853 | if (rpnhmf <= 20.)
|
|---|
| 854 | xhmf = GammaRand( rpnhmf );
|
|---|
| 855 | else
|
|---|
| 856 | xhmf = Erlang( G4int(rpnhmf+0.5) );
|
|---|
| 857 | xpnhmf *= xhmf/rpnhmf;
|
|---|
| 858 | }
|
|---|
| 859 | npnhmf = Poisson( xpnhmf );
|
|---|
| 860 | if(verboseLevel > 1)
|
|---|
| 861 | G4cout << "nshhmf = " << nshhmf << " npnhmf = " << npnhmf
|
|---|
| 862 | << " nstran = " << nstran << G4endl;
|
|---|
| 863 |
|
|---|
| 864 | G4int ntarg = nshhmf + npnhmf + nstran;
|
|---|
| 865 |
|
|---|
| 866 | G4int targ = 0;
|
|---|
| 867 |
|
|---|
| 868 | while (npnhmf > 0)
|
|---|
| 869 | {
|
|---|
| 870 | if ( G4UniformRand() > (1. - atomicNumber/atomicWeight))
|
|---|
| 871 | pv[vecLen] = Proton;
|
|---|
| 872 | else
|
|---|
| 873 | pv[vecLen] = Neutron;
|
|---|
| 874 | targ++;
|
|---|
| 875 | pv[vecLen].setSide( -2 );
|
|---|
| 876 | pv[vecLen].setFlag( true );
|
|---|
| 877 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 878 | vecLen++;
|
|---|
| 879 | npnhmf--;
|
|---|
| 880 | }
|
|---|
| 881 | while (nstran > 0)
|
|---|
| 882 | {
|
|---|
| 883 | ran = G4UniformRand();
|
|---|
| 884 | if (ran < 0.14) pv[vecLen] = Lambda;
|
|---|
| 885 | else if (ran < 0.20) pv[vecLen] = SigmaZero;
|
|---|
| 886 | else if (ran < 0.43) pv[vecLen] = KaonPlus;
|
|---|
| 887 | else if (ran < 0.66) pv[vecLen] = KaonZero;
|
|---|
| 888 | else if (ran < 0.89) pv[vecLen] = AntiKaonZero;
|
|---|
| 889 | else pv[vecLen] = KaonMinus;
|
|---|
| 890 | if (G4UniformRand() > 0.2)
|
|---|
| 891 | {
|
|---|
| 892 | pv[vecLen].setSide( -2 );
|
|---|
| 893 | pv[vecLen].setFlag( true );
|
|---|
| 894 | }
|
|---|
| 895 | else
|
|---|
| 896 | {
|
|---|
| 897 | pv[vecLen].setSide( 1 );
|
|---|
| 898 | pv[vecLen].setFlag( false );
|
|---|
| 899 | ntarg--;
|
|---|
| 900 | }
|
|---|
| 901 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 902 | vecLen++;
|
|---|
| 903 | nstran--;
|
|---|
| 904 | }
|
|---|
| 905 | while (nshhmf > 0)
|
|---|
| 906 | {
|
|---|
| 907 | ran = G4UniformRand();
|
|---|
| 908 | if( ran < 0.33333 )
|
|---|
| 909 | pv[vecLen] = PionPlus;
|
|---|
| 910 | else if( ran < 0.66667 )
|
|---|
| 911 | pv[vecLen] = PionZero;
|
|---|
| 912 | else
|
|---|
| 913 | pv[vecLen] = PionMinus;
|
|---|
| 914 | if (G4UniformRand() > 0.2)
|
|---|
| 915 | {
|
|---|
| 916 | pv[vecLen].setSide( -2 ); // backward cascade particles
|
|---|
| 917 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 918 | }
|
|---|
| 919 | else
|
|---|
| 920 | {
|
|---|
| 921 | pv[vecLen].setSide( 1 );
|
|---|
| 922 | pv[vecLen].setFlag( false );
|
|---|
| 923 | ntarg--;
|
|---|
| 924 | }
|
|---|
| 925 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 926 | vecLen++;
|
|---|
| 927 | nshhmf--;
|
|---|
| 928 | }
|
|---|
| 929 |
|
|---|
| 930 | // assume conservation of kinetic energy
|
|---|
| 931 | // in forward & backward hemispheres
|
|---|
| 932 |
|
|---|
| 933 | G4int is, iskip, iavai1;
|
|---|
| 934 | if(vecLen <= 1) return;
|
|---|
| 935 |
|
|---|
| 936 | tavai1 = centerOfMassEnergy/2.;
|
|---|
| 937 | iavai1 = 0;
|
|---|
| 938 |
|
|---|
| 939 | for (i = 0; i < vecLen; i++)
|
|---|
| 940 | {
|
|---|
| 941 | if (pv[i].getSide() > 0)
|
|---|
| 942 | {
|
|---|
| 943 | tavai1 -= pv[i].getMass();
|
|---|
| 944 | iavai1++;
|
|---|
| 945 | }
|
|---|
| 946 | }
|
|---|
| 947 | if ( iavai1 == 0) return;
|
|---|
| 948 |
|
|---|
| 949 | while( tavai1 <= 0.0 )
|
|---|
| 950 | { // must eliminate a particle from the forward side
|
|---|
| 951 | iskip = G4int(G4UniformRand()*iavai1) + 1;
|
|---|
| 952 | is = 0;
|
|---|
| 953 | for( i=vecLen-1; i>=0; i-- )
|
|---|
| 954 | {
|
|---|
| 955 | if( pv[i].getSide() > 0 )
|
|---|
| 956 | {
|
|---|
| 957 | if (++is == iskip)
|
|---|
| 958 | {
|
|---|
| 959 | tavai1 += pv[i].getMass();
|
|---|
| 960 | iavai1--;
|
|---|
| 961 | if ( i != vecLen-1)
|
|---|
| 962 | {
|
|---|
| 963 | for( j=i; j<vecLen; j++ )
|
|---|
| 964 | {
|
|---|
| 965 | pv[j] = pv[j+1];
|
|---|
| 966 | }
|
|---|
| 967 | }
|
|---|
| 968 | if( --vecLen == 0 ) return; // all the secondaries except of the
|
|---|
| 969 | break; // --+
|
|---|
| 970 | } // |
|
|---|
| 971 | } // v
|
|---|
| 972 | } // break goes down to here
|
|---|
| 973 | } // to the end of the for- loop.
|
|---|
| 974 |
|
|---|
| 975 |
|
|---|
| 976 | tavai2 = (targ+1)*centerOfMassEnergy/2.;
|
|---|
| 977 | G4int iavai2 = 0;
|
|---|
| 978 |
|
|---|
| 979 | for (i = 0; i < vecLen; i++)
|
|---|
| 980 | {
|
|---|
| 981 | if (pv[i].getSide() < 0)
|
|---|
| 982 | {
|
|---|
| 983 | tavai2 -= pv[i].getMass();
|
|---|
| 984 | iavai2++;
|
|---|
| 985 | }
|
|---|
| 986 | }
|
|---|
| 987 | if (iavai2 == 0) return;
|
|---|
| 988 |
|
|---|
| 989 | while( tavai2 <= 0.0 )
|
|---|
| 990 | { // must eliminate a particle from the backward side
|
|---|
| 991 | iskip = G4int(G4UniformRand()*iavai2) + 1;
|
|---|
| 992 | is = 0;
|
|---|
| 993 | for( i = vecLen-1; i >= 0; i-- )
|
|---|
| 994 | {
|
|---|
| 995 | if( pv[i].getSide() < 0 )
|
|---|
| 996 | {
|
|---|
| 997 | if( ++is == iskip )
|
|---|
| 998 | {
|
|---|
| 999 | tavai2 += pv[i].getMass();
|
|---|
| 1000 | iavai2--;
|
|---|
| 1001 | if (pv[i].getSide() == -2) ntarg--;
|
|---|
| 1002 | if (i != vecLen-1)
|
|---|
| 1003 | {
|
|---|
| 1004 | for( j=i; j<vecLen; j++)
|
|---|
| 1005 | {
|
|---|
| 1006 | pv[j] = pv[j+1];
|
|---|
| 1007 | }
|
|---|
| 1008 | }
|
|---|
| 1009 | if (--vecLen == 0) return;
|
|---|
| 1010 | break;
|
|---|
| 1011 | }
|
|---|
| 1012 | }
|
|---|
| 1013 | }
|
|---|
| 1014 | }
|
|---|
| 1015 |
|
|---|
| 1016 | if (verboseLevel > 1)
|
|---|
| 1017 | { G4cout << " pv Vector after Energy checks "
|
|---|
| 1018 | << vecLen << " " << tavai1 << " " << iavai1 << " " << tavai2
|
|---|
| 1019 | << " " << iavai2 << " " << ntarg << G4endl;
|
|---|
| 1020 | pvI.Print(-1);
|
|---|
| 1021 | pvT.Print(-1);
|
|---|
| 1022 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 1023 | }
|
|---|
| 1024 |
|
|---|
| 1025 | // define some vectors for Lorentz transformations
|
|---|
| 1026 |
|
|---|
| 1027 | G4HEVector* pvmx = new G4HEVector [10];
|
|---|
| 1028 |
|
|---|
| 1029 | pvmx[0].setMass( incidentMass );
|
|---|
| 1030 | pvmx[0].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 1031 | pvmx[1].setMass( protonMass);
|
|---|
| 1032 | pvmx[1].setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 1033 | pvmx[3].setMass( protonMass*(1+targ));
|
|---|
| 1034 | pvmx[3].setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 1035 | pvmx[4].setZero();
|
|---|
| 1036 | pvmx[5].setZero();
|
|---|
| 1037 | pvmx[7].setZero();
|
|---|
| 1038 | pvmx[8].setZero();
|
|---|
| 1039 | pvmx[8].setMomentum( 1.0, 0.0 );
|
|---|
| 1040 | pvmx[2].Add( pvmx[0], pvmx[1] );
|
|---|
| 1041 | pvmx[3].Add( pvmx[3], pvmx[0] );
|
|---|
| 1042 | pvmx[0].Lor( pvmx[0], pvmx[2] );
|
|---|
| 1043 | pvmx[1].Lor( pvmx[1], pvmx[2] );
|
|---|
| 1044 |
|
|---|
| 1045 | if (verboseLevel > 1)
|
|---|
| 1046 | { G4cout << " General Vectors after Definition " << G4endl;
|
|---|
| 1047 | for (i=0; i<10; i++) pvmx[i].Print(i);
|
|---|
| 1048 | }
|
|---|
| 1049 |
|
|---|
| 1050 | // Main loop for 4-momentum generation - see Pitha-report (Aachen)
|
|---|
| 1051 | // for a detailed description of the method.
|
|---|
| 1052 | // Process the secondary particles in reverse order.
|
|---|
| 1053 |
|
|---|
| 1054 | G4double dndl[20];
|
|---|
| 1055 | G4double binl[20];
|
|---|
| 1056 | G4double pvMass(0), pvEnergy(0);
|
|---|
| 1057 | G4int pvCode;
|
|---|
| 1058 | G4double aspar, pt, phi, et, xval;
|
|---|
| 1059 | G4double ekin = 0.;
|
|---|
| 1060 | G4double ekin1 = 0.;
|
|---|
| 1061 | G4double ekin2 = 0.;
|
|---|
| 1062 | G4int npg = 0;
|
|---|
| 1063 | G4double rmg0 = 0.;
|
|---|
| 1064 | G4int targ1 = 0; // No fragmentation model for nucleons from
|
|---|
| 1065 | phi = G4UniformRand()*twopi;
|
|---|
| 1066 | for( i=vecLen-1; i>=0; i-- ) // the intranuclear cascade. Mark them with
|
|---|
| 1067 | { // -3 and leave the loop
|
|---|
| 1068 | if( i == 1)
|
|---|
| 1069 | {
|
|---|
| 1070 | if ( (pv[i].getMass() > neutronMass + 0.05) && (G4UniformRand() < 0.2))
|
|---|
| 1071 | {
|
|---|
| 1072 | if(++npg < 19)
|
|---|
| 1073 | {
|
|---|
| 1074 | pv[i].setSide(-3);
|
|---|
| 1075 | rmg0 += pv[i].getMass();
|
|---|
| 1076 | targ++;
|
|---|
| 1077 | continue;
|
|---|
| 1078 | }
|
|---|
| 1079 | }
|
|---|
| 1080 | else if ( pv[i].getMass() > protonMass - 0.05)
|
|---|
| 1081 | {
|
|---|
| 1082 | if(++npg < 19)
|
|---|
| 1083 | {
|
|---|
| 1084 | pv[i].setSide(-3);
|
|---|
| 1085 | rmg0 += pv[i].getMass();
|
|---|
| 1086 | targ++;
|
|---|
| 1087 | continue;
|
|---|
| 1088 | }
|
|---|
| 1089 | }
|
|---|
| 1090 | }
|
|---|
| 1091 | if( pv[i].getSide() == -2)
|
|---|
| 1092 | {
|
|---|
| 1093 | if ( pv[i].getName() == "Proton" || pv[i].getName() == "Neutron")
|
|---|
| 1094 | {
|
|---|
| 1095 | if( ++npg < 19 )
|
|---|
| 1096 | {
|
|---|
| 1097 | pv[i].setSide( -3 );
|
|---|
| 1098 | rmg0 += pv[i].getMass();
|
|---|
| 1099 | targ1++;
|
|---|
| 1100 | continue; // leave the for loop !!
|
|---|
| 1101 | }
|
|---|
| 1102 | }
|
|---|
| 1103 | }
|
|---|
| 1104 | // Set pt and phi values - they are changed somewhat in the
|
|---|
| 1105 | // iteration loop.
|
|---|
| 1106 | // Set mass parameter for lambda fragmentation model
|
|---|
| 1107 |
|
|---|
| 1108 | G4double maspar[] = { 0.75, 0.70, 0.65, 0.60, 0.50, 0.40, 0.20, 0.10};
|
|---|
| 1109 | G4double bp[] = { 4.00, 2.50, 2.20, 3.00, 3.00, 1.70, 3.50, 3.50};
|
|---|
| 1110 | G4double ptex[] = { 1.70, 1.70, 1.50, 1.70, 1.40, 1.20, 1.70, 1.20};
|
|---|
| 1111 |
|
|---|
| 1112 | // Set parameters for lambda simulation
|
|---|
| 1113 | // pt is the average transverse momentum
|
|---|
| 1114 | // aspar is average transverse mass
|
|---|
| 1115 |
|
|---|
| 1116 | pvMass = pv[i].getMass();
|
|---|
| 1117 | j = 2;
|
|---|
| 1118 | if (pv[i].getType() == mesonType ) j = 1;
|
|---|
| 1119 | if ( pv[i].getMass() < 0.4 ) j = 0;
|
|---|
| 1120 | if ( i <= 1 ) j += 3;
|
|---|
| 1121 | if (pv[i].getSide() <= -2) j = 6;
|
|---|
| 1122 | if (j == 6 && (pv[i].getType() == baryonType || pv[i].getType() == antiBaryonType)) j = 7;
|
|---|
| 1123 | pt = std::sqrt(std::pow(-std::log(1.-G4UniformRand())/bp[j],ptex[j]));
|
|---|
| 1124 | if(pt<0.05) pt = Amax(0.001, 0.3*G4UniformRand());
|
|---|
| 1125 | aspar = maspar[j];
|
|---|
| 1126 | phi = G4UniformRand()*twopi;
|
|---|
| 1127 | pv[i].setMomentum( pt*std::cos(phi), pt*std::sin(phi) ); // set x- and y-momentum
|
|---|
| 1128 |
|
|---|
| 1129 | for( j=0; j<20; j++ ) binl[j] = j/(19.*pt); // set the lambda - bins.
|
|---|
| 1130 |
|
|---|
| 1131 | if( pv[i].getSide() > 0 )
|
|---|
| 1132 | et = pvmx[0].getEnergy();
|
|---|
| 1133 | else
|
|---|
| 1134 | et = pvmx[1].getEnergy();
|
|---|
| 1135 |
|
|---|
| 1136 | dndl[0] = 0.0;
|
|---|
| 1137 |
|
|---|
| 1138 | // Start of outer iteration loop
|
|---|
| 1139 |
|
|---|
| 1140 | G4int outerCounter = 0, innerCounter = 0; // three times.
|
|---|
| 1141 | G4bool eliminateThisParticle = true;
|
|---|
| 1142 | G4bool resetEnergies = true;
|
|---|
| 1143 | while( ++outerCounter < 3 )
|
|---|
| 1144 | {
|
|---|
| 1145 | for( l=1; l<20; l++ )
|
|---|
| 1146 | {
|
|---|
| 1147 | xval = (binl[l]+binl[l-1])/2.; // x = lambda /GeV
|
|---|
| 1148 | if( xval > 1./pt )
|
|---|
| 1149 | dndl[l] = dndl[l-1];
|
|---|
| 1150 | else
|
|---|
| 1151 | dndl[l] = dndl[l-1] +
|
|---|
| 1152 | aspar/std::sqrt( std::pow((1.+aspar*xval*aspar*xval),3) ) *
|
|---|
| 1153 | (binl[l]-binl[l-1]) * et /
|
|---|
| 1154 | std::sqrt( pt*xval*et*pt*xval*et + pt*pt + pvMass*pvMass );
|
|---|
| 1155 | }
|
|---|
| 1156 |
|
|---|
| 1157 | // Start of inner iteration loop
|
|---|
| 1158 |
|
|---|
| 1159 | innerCounter = 0; // try this not more than 7 times.
|
|---|
| 1160 | while( ++innerCounter < 7 )
|
|---|
| 1161 | {
|
|---|
| 1162 | l = 1;
|
|---|
| 1163 | ran = G4UniformRand()*dndl[19];
|
|---|
| 1164 | while( ( ran >= dndl[l] ) && ( l < 20 ) )l++;
|
|---|
| 1165 | l = Imin( 19, l );
|
|---|
| 1166 | xval = Amin( 1.0, pt*(binl[l-1] + G4UniformRand()*(binl[l]-binl[l-1]) ) );
|
|---|
| 1167 | if( pv[i].getSide() < 0 ) xval *= -1.;
|
|---|
| 1168 | pv[i].setMomentumAndUpdate( xval*et ); // Set the z-momentum
|
|---|
| 1169 | pvEnergy = pv[i].getEnergy();
|
|---|
| 1170 | if( pv[i].getSide() > 0 ) // Forward side
|
|---|
| 1171 | {
|
|---|
| 1172 | if ( i < 2 )
|
|---|
| 1173 | {
|
|---|
| 1174 | ekin = tavai1 - ekin1;
|
|---|
| 1175 | if (ekin < 0.) ekin = 0.04*std::fabs(normal());
|
|---|
| 1176 | G4double pp1 = pv[i].Length();
|
|---|
| 1177 | if (pp1 >= 1.e-6)
|
|---|
| 1178 | {
|
|---|
| 1179 | G4double pp = std::sqrt(ekin*(ekin+2*pvMass));
|
|---|
| 1180 | pp = Amax(0., pp*pp - pt*pt);
|
|---|
| 1181 | pp = std::sqrt(pp)*pv[i].getSide()/std::fabs(G4double(pv[i].getSide())); // cast for aCC
|
|---|
| 1182 | pv[i].setMomentumAndUpdate( pp );
|
|---|
| 1183 | }
|
|---|
| 1184 | else
|
|---|
| 1185 | {
|
|---|
| 1186 | pv[i].setMomentum(0.,0.,0.);
|
|---|
| 1187 | pv[i].setKineticEnergyAndUpdate( ekin);
|
|---|
| 1188 | }
|
|---|
| 1189 | pvmx[4].Add( pvmx[4], pv[i]);
|
|---|
| 1190 | outerCounter = 2;
|
|---|
| 1191 | resetEnergies = false;
|
|---|
| 1192 | eliminateThisParticle = false;
|
|---|
| 1193 | break;
|
|---|
| 1194 | }
|
|---|
| 1195 | else if( (ekin1+pvEnergy-pvMass) < 0.95*tavai1 )
|
|---|
| 1196 | {
|
|---|
| 1197 | pvmx[4].Add( pvmx[4], pv[i] );
|
|---|
| 1198 | ekin1 += pvEnergy - pvMass;
|
|---|
| 1199 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 1200 | pvmx[6].setMomentum( 0.0 );
|
|---|
| 1201 | outerCounter = 2; // leave outer loop
|
|---|
| 1202 | eliminateThisParticle = false; // don't eliminate this particle
|
|---|
| 1203 | resetEnergies = false;
|
|---|
| 1204 | break; // next particle
|
|---|
| 1205 | }
|
|---|
| 1206 | if( innerCounter > 5 ) break; // leave inner loop
|
|---|
| 1207 |
|
|---|
| 1208 | if( tavai2 >= pvMass )
|
|---|
| 1209 | { // switch sides
|
|---|
| 1210 | pv[i].setSide( -1 );
|
|---|
| 1211 | tavai1 += pvMass;
|
|---|
| 1212 | tavai2 -= pvMass;
|
|---|
| 1213 | iavai2++;
|
|---|
| 1214 | }
|
|---|
| 1215 | }
|
|---|
| 1216 | else
|
|---|
| 1217 | { // backward side
|
|---|
| 1218 | xval = Amin(0.999,0.95+0.05*targ/20.0);
|
|---|
| 1219 | if( (ekin2+pvEnergy-pvMass) < xval*tavai2 )
|
|---|
| 1220 | {
|
|---|
| 1221 | pvmx[5].Add( pvmx[5], pv[i] );
|
|---|
| 1222 | ekin2 += pvEnergy - pvMass;
|
|---|
| 1223 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 1224 | pvmx[6].setMomentum( 0.0 ); // set z-momentum
|
|---|
| 1225 | outerCounter = 2; // leave outer iteration
|
|---|
| 1226 | eliminateThisParticle = false; // don't eliminate this particle
|
|---|
| 1227 | resetEnergies = false;
|
|---|
| 1228 | break; // leave inner iteration
|
|---|
| 1229 | }
|
|---|
| 1230 | if( innerCounter > 5 )break; // leave inner iteration
|
|---|
| 1231 |
|
|---|
| 1232 | if( tavai1 >= pvMass )
|
|---|
| 1233 | { // switch sides
|
|---|
| 1234 | pv[i].setSide( 1 );
|
|---|
| 1235 | tavai1 -= pvMass;
|
|---|
| 1236 | tavai2 += pvMass;
|
|---|
| 1237 | iavai2--;
|
|---|
| 1238 | }
|
|---|
| 1239 | }
|
|---|
| 1240 | pv[i].setMomentum( pv[i].getMomentum().x() * 0.9,
|
|---|
| 1241 | pv[i].getMomentum().y() * 0.9);
|
|---|
| 1242 | pt *= 0.9;
|
|---|
| 1243 | dndl[19] *= 0.9;
|
|---|
| 1244 | } // closes inner loop
|
|---|
| 1245 |
|
|---|
| 1246 | if (resetEnergies)
|
|---|
| 1247 | {
|
|---|
| 1248 | if (verboseLevel > 1) {
|
|---|
| 1249 | G4cout << " Reset energies for index " << i << " "
|
|---|
| 1250 | << ekin1 << " " << tavai1 << G4endl;
|
|---|
| 1251 | pv[i].Print(i);
|
|---|
| 1252 | }
|
|---|
| 1253 | ekin1 = 0.0;
|
|---|
| 1254 | ekin2 = 0.0;
|
|---|
| 1255 | pvmx[4].setZero();
|
|---|
| 1256 | pvmx[5].setZero();
|
|---|
| 1257 |
|
|---|
| 1258 | for( l=i+1; l < vecLen; l++ )
|
|---|
| 1259 | {
|
|---|
| 1260 | if( (pv[l].getMass() < protonMass) || (pv[l].getSide() > 0) )
|
|---|
| 1261 | {
|
|---|
| 1262 | pvEnergy = pv[l].getMass() + 0.95*pv[l].getKineticEnergy();
|
|---|
| 1263 | pv[l].setEnergyAndUpdate( pvEnergy );
|
|---|
| 1264 | if( pv[l].getSide() > 0)
|
|---|
| 1265 | {
|
|---|
| 1266 | ekin1 += pv[l].getKineticEnergy();
|
|---|
| 1267 | pvmx[4].Add( pvmx[4], pv[l] );
|
|---|
| 1268 | }
|
|---|
| 1269 | else
|
|---|
| 1270 | {
|
|---|
| 1271 | ekin2 += pv[l].getKineticEnergy();
|
|---|
| 1272 | pvmx[5].Add( pvmx[5], pv[l] );
|
|---|
| 1273 | }
|
|---|
| 1274 | }
|
|---|
| 1275 | }
|
|---|
| 1276 | }
|
|---|
| 1277 | } // closes outer iteration
|
|---|
| 1278 |
|
|---|
| 1279 | if( eliminateThisParticle ) // not enough energy,
|
|---|
| 1280 | { // eliminate this particle
|
|---|
| 1281 | if (verboseLevel > 1) {
|
|---|
| 1282 | G4cout << " Eliminate particle index " << i << G4endl;
|
|---|
| 1283 | pv[i].Print(i);
|
|---|
| 1284 | }
|
|---|
| 1285 | if(i != vecLen-1)
|
|---|
| 1286 | {
|
|---|
| 1287 | for( j=i; j < vecLen-1; j++ )
|
|---|
| 1288 | { // shift down
|
|---|
| 1289 | pv[j] = pv[j+1];
|
|---|
| 1290 | }
|
|---|
| 1291 | }
|
|---|
| 1292 | vecLen--;
|
|---|
| 1293 | if(vecLen < 2) return;
|
|---|
| 1294 | i++;
|
|---|
| 1295 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 1296 | pvmx[6].setMomentum( 0.0 ); // set z-momentum
|
|---|
| 1297 | }
|
|---|
| 1298 | } // closes main for loop
|
|---|
| 1299 | if (verboseLevel > 1)
|
|---|
| 1300 | { G4cout << " pv Vector after lambda fragmentation " << vecLen << G4endl;
|
|---|
| 1301 | pvI.Print(-1);
|
|---|
| 1302 | pvT.Print(-1);
|
|---|
| 1303 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 1304 | for (i=0; i < 10; i++) pvmx[i].Print(i);
|
|---|
| 1305 | }
|
|---|
| 1306 |
|
|---|
| 1307 |
|
|---|
| 1308 | // Backward nucleons produced with a cluster model
|
|---|
| 1309 |
|
|---|
| 1310 | G4double gpar[] = {2.6, 2.6, 1.80, 1.30, 1.20};
|
|---|
| 1311 | G4double cpar[] = {0.6, 0.6, 0.35, 0.15, 0.10};
|
|---|
| 1312 |
|
|---|
| 1313 | if (npg > 0)
|
|---|
| 1314 | {
|
|---|
| 1315 | G4double rmg = rmg0;
|
|---|
| 1316 | if (npg > 1)
|
|---|
| 1317 | {
|
|---|
| 1318 | G4int npg1 = npg-1;
|
|---|
| 1319 | if (npg1 >4) npg1 = 4;
|
|---|
| 1320 | rmg += std::pow( -std::log(1.-G4UniformRand()), cpar[npg1])/gpar[npg1];
|
|---|
| 1321 | }
|
|---|
| 1322 | G4double ga = 1.2;
|
|---|
| 1323 | G4double ekit1 = 0.04, ekit2 = 0.6;
|
|---|
| 1324 | if(incidentKineticEnergy < 5.)
|
|---|
| 1325 | {
|
|---|
| 1326 | ekit1 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 1327 | ekit2 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 1328 | }
|
|---|
| 1329 | G4double avalue = (1.-ga)/(std::pow(ekit2,1.-ga)-std::pow(ekit1,1.-ga));
|
|---|
| 1330 | for (i = 0; i < vecLen; i++)
|
|---|
| 1331 | {
|
|---|
| 1332 | if (pv[i].getSide() == -3)
|
|---|
| 1333 | {
|
|---|
| 1334 | G4double ekit = std::pow(G4UniformRand()*(1.-ga)/avalue + std::pow(ekit1,1.-ga), 1./(1.-ga) );
|
|---|
| 1335 | G4double cost = Amax(-1., Amin(1., std::log(2.23*G4UniformRand()+0.383)/0.96));
|
|---|
| 1336 | G4double sint = std::sqrt(1. - cost*cost);
|
|---|
| 1337 | G4double phi = twopi*G4UniformRand();
|
|---|
| 1338 | G4double pp = std::sqrt(ekit*(ekit+2*pv[i].getMass()));
|
|---|
| 1339 | pv[i].setMomentum( pp*sint*std::sin(phi),
|
|---|
| 1340 | pp*sint*std::cos(phi),
|
|---|
| 1341 | pp*cost );
|
|---|
| 1342 | pv[i].Lor( pv[i], pvmx[2] );
|
|---|
| 1343 | pvmx[5].Add( pvmx[5], pv[i] );
|
|---|
| 1344 | }
|
|---|
| 1345 | }
|
|---|
| 1346 | }
|
|---|
| 1347 |
|
|---|
| 1348 | if (vecLen <= 2) {
|
|---|
| 1349 | successful = false;
|
|---|
| 1350 | return;
|
|---|
| 1351 | }
|
|---|
| 1352 |
|
|---|
| 1353 | // Lorentz transformation in lab system
|
|---|
| 1354 |
|
|---|
| 1355 | targ = 0;
|
|---|
| 1356 | for( i=0; i < vecLen; i++ )
|
|---|
| 1357 | {
|
|---|
| 1358 | if( pv[i].getType() == baryonType )targ++;
|
|---|
| 1359 | if( pv[i].getType() == antiBaryonType )targ--;
|
|---|
| 1360 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 1361 | pv[i].Lor( pv[i], pvmx[1] );
|
|---|
| 1362 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 1363 | }
|
|---|
| 1364 | if ( targ <1) targ = 1;
|
|---|
| 1365 |
|
|---|
| 1366 | G4bool dum=0;
|
|---|
| 1367 | if( lead )
|
|---|
| 1368 | {
|
|---|
| 1369 | for( i=0; i<vecLen; i++ )
|
|---|
| 1370 | {
|
|---|
| 1371 | if( pv[i].getCode() == lead )
|
|---|
| 1372 | {
|
|---|
| 1373 | dum = false;
|
|---|
| 1374 | break;
|
|---|
| 1375 | }
|
|---|
| 1376 | }
|
|---|
| 1377 | if( dum )
|
|---|
| 1378 | {
|
|---|
| 1379 | i = 0;
|
|---|
| 1380 |
|
|---|
| 1381 | if( ( (leadParticle.getType() == baryonType ||
|
|---|
| 1382 | leadParticle.getType() == antiBaryonType)
|
|---|
| 1383 | && (pv[1].getType() == baryonType ||
|
|---|
| 1384 | pv[1].getType() == antiBaryonType))
|
|---|
| 1385 | || ( (leadParticle.getType() == mesonType)
|
|---|
| 1386 | && (pv[1].getType() == mesonType)))
|
|---|
| 1387 | {
|
|---|
| 1388 | i = 1;
|
|---|
| 1389 | }
|
|---|
| 1390 | ekin = pv[i].getKineticEnergy();
|
|---|
| 1391 | pv[i] = leadParticle;
|
|---|
| 1392 | if( pv[i].getFlag() )
|
|---|
| 1393 | pv[i].setTOF( -1.0 );
|
|---|
| 1394 | else
|
|---|
| 1395 | pv[i].setTOF( 1.0 );
|
|---|
| 1396 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 1397 | }
|
|---|
| 1398 | }
|
|---|
| 1399 |
|
|---|
| 1400 | pvmx[3].setMass( incidentMass);
|
|---|
| 1401 | pvmx[3].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 1402 |
|
|---|
| 1403 | G4double ekin0 = pvmx[3].getKineticEnergy();
|
|---|
| 1404 |
|
|---|
| 1405 | pvmx[4].setMass( protonMass * targ);
|
|---|
| 1406 | pvmx[4].setEnergy( protonMass * targ);
|
|---|
| 1407 | pvmx[4].setKineticEnergy(0.);
|
|---|
| 1408 | pvmx[4].setMomentum(0., 0., 0.);
|
|---|
| 1409 | ekin = pvmx[3].getEnergy() + pvmx[4].getEnergy();
|
|---|
| 1410 |
|
|---|
| 1411 | pvmx[5].Add( pvmx[3], pvmx[4] );
|
|---|
| 1412 | pvmx[3].Lor( pvmx[3], pvmx[5] );
|
|---|
| 1413 | pvmx[4].Lor( pvmx[4], pvmx[5] );
|
|---|
| 1414 |
|
|---|
| 1415 | G4double tecm = pvmx[3].getEnergy() + pvmx[4].getEnergy();
|
|---|
| 1416 |
|
|---|
| 1417 | pvmx[7].setZero();
|
|---|
| 1418 |
|
|---|
| 1419 | ekin1 = 0.0;
|
|---|
| 1420 | G4double teta, wgt;
|
|---|
| 1421 |
|
|---|
| 1422 | for( i=0; i < vecLen; i++ )
|
|---|
| 1423 | {
|
|---|
| 1424 | pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 1425 | ekin1 += pv[i].getKineticEnergy();
|
|---|
| 1426 | ekin -= pv[i].getMass();
|
|---|
| 1427 | }
|
|---|
| 1428 |
|
|---|
| 1429 | if( vecLen > 1 && vecLen < 19 )
|
|---|
| 1430 | {
|
|---|
| 1431 | G4bool constantCrossSection = true;
|
|---|
| 1432 | G4HEVector pw[19];
|
|---|
| 1433 | for(i=0; i<vecLen; i++) pw[i] = pv[i];
|
|---|
| 1434 | wgt = NBodyPhaseSpace( tecm, constantCrossSection, pw, vecLen );
|
|---|
| 1435 | ekin = 0.0;
|
|---|
| 1436 | for( i=0; i < vecLen; i++ )
|
|---|
| 1437 | {
|
|---|
| 1438 | pvmx[6].setMass( pw[i].getMass());
|
|---|
| 1439 | pvmx[6].setMomentum( pw[i].getMomentum() );
|
|---|
| 1440 | pvmx[6].SmulAndUpdate( pvmx[6], 1. );
|
|---|
| 1441 | pvmx[6].Lor( pvmx[6], pvmx[4] );
|
|---|
| 1442 | ekin += pvmx[6].getKineticEnergy();
|
|---|
| 1443 | }
|
|---|
| 1444 | teta = pvmx[7].Ang( pvmx[3] );
|
|---|
| 1445 | if (verboseLevel > 1)
|
|---|
| 1446 | G4cout << " vecLen > 1 && vecLen < 19 " << teta << " " << ekin0
|
|---|
| 1447 | << " " << ekin1 << " " << ekin << G4endl;
|
|---|
| 1448 | }
|
|---|
| 1449 |
|
|---|
| 1450 | if( ekin1 != 0.0 )
|
|---|
| 1451 | {
|
|---|
| 1452 | pvmx[6].setZero();
|
|---|
| 1453 | wgt = ekin/ekin1;
|
|---|
| 1454 | ekin1 = 0.;
|
|---|
| 1455 | for( i=0; i < vecLen; i++ )
|
|---|
| 1456 | {
|
|---|
| 1457 | pvMass = pv[i].getMass();
|
|---|
| 1458 | ekin = pv[i].getKineticEnergy() * wgt;
|
|---|
| 1459 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 1460 | ekin1 += ekin;
|
|---|
| 1461 | pvmx[6].Add( pvmx[6], pv[i] );
|
|---|
| 1462 | }
|
|---|
| 1463 | teta = pvmx[6].Ang( pvmx[3] );
|
|---|
| 1464 | if (verboseLevel > 1) {
|
|---|
| 1465 | G4cout << " ekin1 != 0 " << teta << " " << ekin0 << " "
|
|---|
| 1466 | << ekin1 << G4endl;
|
|---|
| 1467 | incidentParticle.Print(0);
|
|---|
| 1468 | targetParticle.Print(1);
|
|---|
| 1469 | for(i=0;i<vecLen;i++) pv[i].Print(i);
|
|---|
| 1470 | }
|
|---|
| 1471 | }
|
|---|
| 1472 |
|
|---|
| 1473 | // Do some smearing in the transverse direction due to Fermi motion
|
|---|
| 1474 |
|
|---|
| 1475 | G4double ry = G4UniformRand();
|
|---|
| 1476 | G4double rz = G4UniformRand();
|
|---|
| 1477 | G4double rx = twopi*rz;
|
|---|
| 1478 | G4double a1 = std::sqrt(-2.0*std::log(ry));
|
|---|
| 1479 | G4double rantarg1 = a1*std::cos(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 1480 | G4double rantarg2 = a1*std::sin(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 1481 |
|
|---|
| 1482 | for (i = 0; i < vecLen; i++)
|
|---|
| 1483 | pv[i].setMomentum( pv[i].getMomentum().x()+rantarg1,
|
|---|
| 1484 | pv[i].getMomentum().y()+rantarg2 );
|
|---|
| 1485 |
|
|---|
| 1486 | if (verboseLevel > 1) {
|
|---|
| 1487 | pvmx[6].setZero();
|
|---|
| 1488 | for (i = 0; i < vecLen; i++) pvmx[6].Add( pvmx[6], pv[i] );
|
|---|
| 1489 | teta = pvmx[6].Ang( pvmx[3] );
|
|---|
| 1490 | G4cout << " After smearing " << teta << G4endl;
|
|---|
| 1491 | }
|
|---|
| 1492 |
|
|---|
| 1493 | // Rotate in the direction of the primary particle momentum (z-axis).
|
|---|
| 1494 | // This does disturb our inclusive distributions somewhat, but it is
|
|---|
| 1495 | // necessary for momentum conservation
|
|---|
| 1496 |
|
|---|
| 1497 | // Also subtract binding energies and make some further corrections
|
|---|
| 1498 | // if required
|
|---|
| 1499 |
|
|---|
| 1500 | G4double dekin = 0.0;
|
|---|
| 1501 | G4int npions = 0;
|
|---|
| 1502 | G4double ek1 = 0.0;
|
|---|
| 1503 | G4double alekw, xxh;
|
|---|
| 1504 | G4double cfa = 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.);
|
|---|
| 1505 | G4double alem[] = {1.40, 2.30, 2.70, 3.00, 3.40, 4.60, 7.00, 10.00};
|
|---|
| 1506 | G4double val0[] = {0.00, 0.40, 0.48, 0.51, 0.54, 0.60, 0.65, 0.70};
|
|---|
| 1507 |
|
|---|
| 1508 | if (verboseLevel > 1)
|
|---|
| 1509 | G4cout << " Rotation in Direction of primary particle (Defs1)" << G4endl;
|
|---|
| 1510 |
|
|---|
| 1511 | for (i = 0; i < vecLen; i++)
|
|---|
| 1512 | {
|
|---|
| 1513 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 1514 | pv[i].Defs1( pv[i], pvI );
|
|---|
| 1515 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 1516 | if (atomicWeight > 1.5)
|
|---|
| 1517 | {
|
|---|
| 1518 | ekin = Amax( 1.e-6,pv[i].getKineticEnergy() - cfa*( 1. + 0.5*normal()));
|
|---|
| 1519 | alekw = std::log( incidentKineticEnergy );
|
|---|
| 1520 | xxh = 1.;
|
|---|
| 1521 | if(incidentCode == pionPlusCode || incidentCode == pionMinusCode)
|
|---|
| 1522 | {
|
|---|
| 1523 | if(pv[i].getCode() == pionZeroCode)
|
|---|
| 1524 | {
|
|---|
| 1525 | if(G4UniformRand() < std::log(atomicWeight))
|
|---|
| 1526 | {
|
|---|
| 1527 | if (alekw > alem[0])
|
|---|
| 1528 | {
|
|---|
| 1529 | for (j = 1; j < 8; j++)
|
|---|
| 1530 | {
|
|---|
| 1531 | if(alekw < alem[j]) break;
|
|---|
| 1532 | }
|
|---|
| 1533 | xxh = (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alekw
|
|---|
| 1534 | + val0[j-1] - (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alem[j-1];
|
|---|
| 1535 | xxh = 1. - xxh;
|
|---|
| 1536 | }
|
|---|
| 1537 | }
|
|---|
| 1538 | }
|
|---|
| 1539 | }
|
|---|
| 1540 | dekin += ekin*(1.-xxh);
|
|---|
| 1541 | ekin *= xxh;
|
|---|
| 1542 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 1543 | pvCode = pv[i].getCode();
|
|---|
| 1544 | if ((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 1545 | {
|
|---|
| 1546 | npions += 1;
|
|---|
| 1547 | ek1 += ekin;
|
|---|
| 1548 | }
|
|---|
| 1549 | }
|
|---|
| 1550 | }
|
|---|
| 1551 | if( (ek1 > 0.0) && (npions > 0) )
|
|---|
| 1552 | {
|
|---|
| 1553 | dekin = 1.+dekin/ek1;
|
|---|
| 1554 | for (i = 0; i < vecLen; i++)
|
|---|
| 1555 | {
|
|---|
| 1556 | pvCode = pv[i].getCode();
|
|---|
| 1557 | if((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 1558 | {
|
|---|
| 1559 | ekin = Amax( 1.0e-6, pv[i].getKineticEnergy() * dekin );
|
|---|
| 1560 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 1561 | }
|
|---|
| 1562 | }
|
|---|
| 1563 | }
|
|---|
| 1564 | if (verboseLevel > 1)
|
|---|
| 1565 | { G4cout << " Lab-System " << ek1 << " " << npions << G4endl;
|
|---|
| 1566 | incidentParticle.Print(0);
|
|---|
| 1567 | targetParticle.Print(1);
|
|---|
| 1568 | for (i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 1569 | }
|
|---|
| 1570 |
|
|---|
| 1571 | // Add black track particles
|
|---|
| 1572 | // the total number of particles produced is restricted to 198
|
|---|
| 1573 | // this may have influence on very high energies
|
|---|
| 1574 |
|
|---|
| 1575 | if (verboseLevel > 1)
|
|---|
| 1576 | G4cout << " Evaporation : " << atomicWeight << " "
|
|---|
| 1577 | << excitationEnergyGNP << " " << excitationEnergyDTA << G4endl;
|
|---|
| 1578 |
|
|---|
| 1579 | G4double sprob = 0.;
|
|---|
| 1580 | if (incidentKineticEnergy > 5.)
|
|---|
| 1581 | // sprob = Amin(1., (0.394-0.063*std::log(atomicWeight))*std::log(incidentKineticEnergy-4.) );
|
|---|
| 1582 | sprob = Amin(1., 0.000314*atomicWeight*std::log(incidentKineticEnergy-4.));
|
|---|
| 1583 | if( atomicWeight > 1.5 && G4UniformRand() > sprob )
|
|---|
| 1584 | {
|
|---|
| 1585 |
|
|---|
| 1586 | G4double cost, sint, pp, eka;
|
|---|
| 1587 | G4int spall(0), nbl(0);
|
|---|
| 1588 |
|
|---|
| 1589 | // first add protons and neutrons
|
|---|
| 1590 |
|
|---|
| 1591 | if( excitationEnergyGNP >= 0.001 )
|
|---|
| 1592 | {
|
|---|
| 1593 | // nbl = number of proton/neutron black track particles
|
|---|
| 1594 | // tex is their total kinetic energy (GeV)
|
|---|
| 1595 |
|
|---|
| 1596 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyGNP/
|
|---|
| 1597 | (excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 1598 | if( targ+nbl > atomicWeight ) nbl = (int)(atomicWeight - targ);
|
|---|
| 1599 | if (verboseLevel > 1)
|
|---|
| 1600 | G4cout << " evaporation " << targ << " " << nbl << " "
|
|---|
| 1601 | << sprob << G4endl;
|
|---|
| 1602 | spall = targ;
|
|---|
| 1603 | if( nbl > 0)
|
|---|
| 1604 | {
|
|---|
| 1605 | ekin = (excitationEnergyGNP)/nbl;
|
|---|
| 1606 | ekin2 = 0.0;
|
|---|
| 1607 | for( i=0; i<nbl; i++ )
|
|---|
| 1608 | {
|
|---|
| 1609 | if( G4UniformRand() < sprob )
|
|---|
| 1610 | {
|
|---|
| 1611 | if(verboseLevel > 1) G4cout << " Particle skipped " << G4endl;
|
|---|
| 1612 | continue;
|
|---|
| 1613 | }
|
|---|
| 1614 | if( ekin2 > excitationEnergyGNP) break;
|
|---|
| 1615 | ran = G4UniformRand();
|
|---|
| 1616 | ekin1 = -ekin*std::log(ran) - cfa*(1.0+0.5*normal());
|
|---|
| 1617 | if (ekin1 < 0) ekin1 = -0.010*std::log(ran);
|
|---|
| 1618 | ekin2 += ekin1;
|
|---|
| 1619 | if( ekin2 > excitationEnergyGNP)
|
|---|
| 1620 | ekin1 = Amax( 1.0e-6, excitationEnergyGNP-(ekin2-ekin1) );
|
|---|
| 1621 | if( G4UniformRand() > (1.0-atomicNumber/(atomicWeight)))
|
|---|
| 1622 | pv[vecLen] = Proton;
|
|---|
| 1623 | else
|
|---|
| 1624 | pv[vecLen] = Neutron;
|
|---|
| 1625 | spall++;
|
|---|
| 1626 | cost = G4UniformRand() * 2.0 - 1.0;
|
|---|
| 1627 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 1628 | phi = twopi * G4UniformRand();
|
|---|
| 1629 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 1630 | pv[vecLen].setSide( -4 );
|
|---|
| 1631 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 1632 | pvMass = pv[vecLen].getMass();
|
|---|
| 1633 | pvEnergy = ekin1 + pvMass;
|
|---|
| 1634 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 1635 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 1636 | pp*sint*std::cos(phi),
|
|---|
| 1637 | pp*cost );
|
|---|
| 1638 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 1639 | vecLen++;
|
|---|
| 1640 | }
|
|---|
| 1641 | if( (atomicWeight >= 10.0 ) && (incidentKineticEnergy <= 2.0) )
|
|---|
| 1642 | {
|
|---|
| 1643 | G4int ika, kk = 0;
|
|---|
| 1644 | eka = incidentKineticEnergy;
|
|---|
| 1645 | if( eka > 1.0 )eka *= eka;
|
|---|
| 1646 | eka = Amax( 0.1, eka );
|
|---|
| 1647 | ika = G4int(3.6*std::exp((atomicNumber*atomicNumber
|
|---|
| 1648 | /atomicWeight-35.56)/6.45)/eka);
|
|---|
| 1649 | if( ika > 0 )
|
|---|
| 1650 | {
|
|---|
| 1651 | for( i=(vecLen-1); i>=0; i-- )
|
|---|
| 1652 | {
|
|---|
| 1653 | if( (pv[i].getCode() == protonCode) && pv[i].getFlag() )
|
|---|
| 1654 | {
|
|---|
| 1655 | pTemp = pv[i];
|
|---|
| 1656 | pv[i].setDefinition("Neutron");
|
|---|
| 1657 | pv[i].setMomentumAndUpdate(pTemp.getMomentum());
|
|---|
| 1658 | if (verboseLevel > 1) pv[i].Print(i);
|
|---|
| 1659 | if( ++kk > ika ) break;
|
|---|
| 1660 | }
|
|---|
| 1661 | }
|
|---|
| 1662 | }
|
|---|
| 1663 | }
|
|---|
| 1664 | }
|
|---|
| 1665 | }
|
|---|
| 1666 |
|
|---|
| 1667 | // finished adding proton/neutron black track particles
|
|---|
| 1668 | // now, try to add deuterons, tritons and alphas
|
|---|
| 1669 |
|
|---|
| 1670 | if( excitationEnergyDTA >= 0.001 )
|
|---|
| 1671 | {
|
|---|
| 1672 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyDTA
|
|---|
| 1673 | /(excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 1674 |
|
|---|
| 1675 | // nbl is the number of deutrons, tritons, and alphas produced
|
|---|
| 1676 |
|
|---|
| 1677 | if (verboseLevel > 1)
|
|---|
| 1678 | G4cout << " evaporation " << targ << " " << nbl << " "
|
|---|
| 1679 | << sprob << G4endl;
|
|---|
| 1680 | if( nbl > 0 )
|
|---|
| 1681 | {
|
|---|
| 1682 | ekin = excitationEnergyDTA/nbl;
|
|---|
| 1683 | ekin2 = 0.0;
|
|---|
| 1684 | for( i=0; i<nbl; i++ )
|
|---|
| 1685 | {
|
|---|
| 1686 | if( G4UniformRand() < sprob )
|
|---|
| 1687 | {
|
|---|
| 1688 | if(verboseLevel > 1) G4cout << " Particle skipped " << G4endl;
|
|---|
| 1689 | continue;
|
|---|
| 1690 | }
|
|---|
| 1691 | if( ekin2 > excitationEnergyDTA) break;
|
|---|
| 1692 | ran = G4UniformRand();
|
|---|
| 1693 | ekin1 = -ekin*std::log(ran)-cfa*(1.+0.5*normal());
|
|---|
| 1694 | if( ekin1 < 0.0 ) ekin1 = -0.010*std::log(ran);
|
|---|
| 1695 | ekin2 += ekin1;
|
|---|
| 1696 | if( ekin2 > excitationEnergyDTA)
|
|---|
| 1697 | ekin1 = Amax( 1.0e-6, excitationEnergyDTA-(ekin2-ekin1));
|
|---|
| 1698 | cost = G4UniformRand()*2.0 - 1.0;
|
|---|
| 1699 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 1700 | phi = twopi*G4UniformRand();
|
|---|
| 1701 | ran = G4UniformRand();
|
|---|
| 1702 | if( ran <= 0.60 )
|
|---|
| 1703 | pv[vecLen] = Deuteron;
|
|---|
| 1704 | else if (ran <= 0.90)
|
|---|
| 1705 | pv[vecLen] = Triton;
|
|---|
| 1706 | else
|
|---|
| 1707 | pv[vecLen] = Alpha;
|
|---|
| 1708 | spall += (int)(pv[vecLen].getMass() * 1.066);
|
|---|
| 1709 | if( spall > atomicWeight ) break;
|
|---|
| 1710 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 1711 | pv[vecLen].setSide( -4 );
|
|---|
| 1712 | pvMass = pv[vecLen].getMass();
|
|---|
| 1713 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 1714 | pvEnergy = pvMass + ekin1;
|
|---|
| 1715 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 1716 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 1717 | pp*sint*std::cos(phi),
|
|---|
| 1718 | pp*cost );
|
|---|
| 1719 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 1720 | vecLen++;
|
|---|
| 1721 | }
|
|---|
| 1722 | }
|
|---|
| 1723 | }
|
|---|
| 1724 | }
|
|---|
| 1725 | if( centerOfMassEnergy <= (4.0+G4UniformRand()) )
|
|---|
| 1726 | {
|
|---|
| 1727 | for( i=0; i<vecLen; i++ )
|
|---|
| 1728 | {
|
|---|
| 1729 | G4double etb = pv[i].getKineticEnergy();
|
|---|
| 1730 | if( etb >= incidentKineticEnergy )
|
|---|
| 1731 | pv[i].setKineticEnergyAndUpdate( incidentKineticEnergy );
|
|---|
| 1732 | }
|
|---|
| 1733 | }
|
|---|
| 1734 |
|
|---|
| 1735 | if(verboseLevel > 1)
|
|---|
| 1736 | { G4cout << "Call TuningOfHighEnergyCacsading vecLen = " << vecLen << G4endl;
|
|---|
| 1737 | incidentParticle.Print(0);
|
|---|
| 1738 | targetParticle.Print(1);
|
|---|
| 1739 | for (i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 1740 | }
|
|---|
| 1741 |
|
|---|
| 1742 | TuningOfHighEnergyCascading( pv, vecLen,
|
|---|
| 1743 | incidentParticle, targetParticle,
|
|---|
| 1744 | atomicWeight, atomicNumber);
|
|---|
| 1745 |
|
|---|
| 1746 | if(verboseLevel > 1)
|
|---|
| 1747 | { G4cout << " After Tuning: " << G4endl;
|
|---|
| 1748 | for(i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 1749 | }
|
|---|
| 1750 |
|
|---|
| 1751 | // Calculate time delay for nuclear reactions
|
|---|
| 1752 |
|
|---|
| 1753 | G4double tof = incidentTOF;
|
|---|
| 1754 | if( (atomicWeight >= 1.5) && (atomicWeight <= 230.0)
|
|---|
| 1755 | && (incidentKineticEnergy <= 0.2) )
|
|---|
| 1756 | tof -= 500.0 * std::exp(-incidentKineticEnergy /0.04) * std::log( G4UniformRand() );
|
|---|
| 1757 |
|
|---|
| 1758 | for(i=0; i<vecLen; i++)
|
|---|
| 1759 | {
|
|---|
| 1760 | if(pv[i].getName() == "KaonZero" || pv[i].getName() == "AntiKaonZero")
|
|---|
| 1761 | {
|
|---|
| 1762 | pvmx[0] = pv[i];
|
|---|
| 1763 | if(G4UniformRand() < 0.5) pv[i].setDefinition("KaonZeroShort");
|
|---|
| 1764 | else pv[i].setDefinition("KaonZeroLong");
|
|---|
| 1765 | pv[i].setMomentumAndUpdate(pvmx[0].getMomentum());
|
|---|
| 1766 | }
|
|---|
| 1767 | }
|
|---|
| 1768 |
|
|---|
| 1769 | successful = true;
|
|---|
| 1770 | delete [] pvmx;
|
|---|
| 1771 | G4int testCurr=0;
|
|---|
| 1772 | G4double totKin=0;
|
|---|
| 1773 | for(testCurr=0; testCurr<vecLen; testCurr++)
|
|---|
| 1774 | {
|
|---|
| 1775 | totKin+=pv[testCurr].getKineticEnergy();
|
|---|
| 1776 | if(totKin>incidentKineticEnergy*1.05)
|
|---|
| 1777 | {
|
|---|
| 1778 | vecLen = testCurr;
|
|---|
| 1779 | break;
|
|---|
| 1780 | }
|
|---|
| 1781 | }
|
|---|
| 1782 |
|
|---|
| 1783 | return;
|
|---|
| 1784 | }
|
|---|
| 1785 |
|
|---|
| 1786 | void
|
|---|
| 1787 | G4HEInelastic::TuningOfHighEnergyCascading(G4HEVector pv[],
|
|---|
| 1788 | G4int &vecLen,
|
|---|
| 1789 | G4HEVector incidentParticle,
|
|---|
| 1790 | G4HEVector targetParticle,
|
|---|
| 1791 | G4double atomicWeight,
|
|---|
| 1792 | G4double atomicNumber)
|
|---|
| 1793 | {
|
|---|
| 1794 | G4int i,j;
|
|---|
| 1795 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 1796 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 1797 | G4double incidentCharge = incidentParticle.getCharge();
|
|---|
| 1798 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 1799 | G4double targetMass = targetParticle.getMass();
|
|---|
| 1800 | G4int pionPlusCode = PionPlus.getCode();
|
|---|
| 1801 | G4int pionMinusCode = PionMinus.getCode();
|
|---|
| 1802 | G4int pionZeroCode = PionZero.getCode();
|
|---|
| 1803 | G4int protonCode = Proton.getCode();
|
|---|
| 1804 | G4int neutronCode = Neutron.getCode();
|
|---|
| 1805 | G4HEVector *pvmx = new G4HEVector [10];
|
|---|
| 1806 | G4double *reddec = new G4double [7];
|
|---|
| 1807 |
|
|---|
| 1808 | if (incidentKineticEnergy > (25.+G4UniformRand()*75.) ) {
|
|---|
| 1809 | G4double reden = -0.7 + 0.29*std::log10(incidentKineticEnergy);
|
|---|
| 1810 | // G4double redat = 1.0 - 0.40*std::log10(atomicWeight);
|
|---|
| 1811 | // G4double redat = 0.5 - 0.18*std::log10(atomicWeight);
|
|---|
| 1812 | G4double redat = 0.722 - 0.278*std::log10(atomicWeight);
|
|---|
| 1813 | G4double pmax = -200.;
|
|---|
| 1814 | G4double pmapim = -200.;
|
|---|
| 1815 | G4double pmapi0 = -200.;
|
|---|
| 1816 | G4double pmapip = -200.;
|
|---|
| 1817 | G4int ipmax = 0;
|
|---|
| 1818 | G4int maxpim = 0;
|
|---|
| 1819 | G4int maxpi0 = 0;
|
|---|
| 1820 | G4int maxpip = 0;
|
|---|
| 1821 | G4int iphmf;
|
|---|
| 1822 | if ( (G4UniformRand() > (atomicWeight/100.-0.28))
|
|---|
| 1823 | && (std::fabs(incidentCharge) > 0.) )
|
|---|
| 1824 | {
|
|---|
| 1825 | for (i=0; i < vecLen; i++)
|
|---|
| 1826 | {
|
|---|
| 1827 | iphmf = pv[i].getCode();
|
|---|
| 1828 | G4double ppp = pv[i].Length();
|
|---|
| 1829 | if ( ppp > pmax)
|
|---|
| 1830 | {
|
|---|
| 1831 | pmax = ppp; ipmax = i;
|
|---|
| 1832 | }
|
|---|
| 1833 | if (iphmf == pionPlusCode && ppp > pmapip )
|
|---|
| 1834 | {
|
|---|
| 1835 | pmapip = ppp; maxpip = i;
|
|---|
| 1836 | }
|
|---|
| 1837 | else if (iphmf == pionZeroCode && ppp > pmapi0)
|
|---|
| 1838 | {
|
|---|
| 1839 | pmapi0 = ppp; maxpi0 = i;
|
|---|
| 1840 | }
|
|---|
| 1841 | else if (iphmf == pionMinusCode && ppp > pmapim)
|
|---|
| 1842 | {
|
|---|
| 1843 | pmapim = ppp; maxpim = i;
|
|---|
| 1844 | }
|
|---|
| 1845 | }
|
|---|
| 1846 | }
|
|---|
| 1847 | if(verboseLevel > 1)
|
|---|
| 1848 | {
|
|---|
| 1849 | G4cout << "ipmax, pmax " << ipmax << " " << pmax << G4endl;
|
|---|
| 1850 | G4cout << "maxpip,pmapip " << maxpip << " " << pmapip << G4endl;
|
|---|
| 1851 | G4cout << "maxpi0,pmapi0 " << maxpi0 << " " << pmapi0 << G4endl;
|
|---|
| 1852 | G4cout << "maxpim,pmapim " << maxpim << " " << pmapim << G4endl;
|
|---|
| 1853 | }
|
|---|
| 1854 |
|
|---|
| 1855 | if ( vecLen > 2)
|
|---|
| 1856 | {
|
|---|
| 1857 | for (i=2; i<vecLen; i++)
|
|---|
| 1858 | {
|
|---|
| 1859 | iphmf = pv[i].getCode();
|
|---|
| 1860 | if ( ((iphmf==protonCode)||(iphmf==neutronCode)||(pv[i].getType()=="Nucleus"))
|
|---|
| 1861 | && (pv[i].Length()<1.5)
|
|---|
| 1862 | && ((G4UniformRand()<reden)||(G4UniformRand()<redat)))
|
|---|
| 1863 | {
|
|---|
| 1864 | pv[i].setMomentumAndUpdate( 0., 0., 0.);
|
|---|
| 1865 | if(verboseLevel > 1)
|
|---|
| 1866 | {
|
|---|
| 1867 | G4cout << "zero Momentum for particle " << G4endl;
|
|---|
| 1868 | pv[i].Print(i);
|
|---|
| 1869 | }
|
|---|
| 1870 | }
|
|---|
| 1871 | }
|
|---|
| 1872 | }
|
|---|
| 1873 | if (maxpi0 == ipmax)
|
|---|
| 1874 | {
|
|---|
| 1875 | if (G4UniformRand() < pmapi0/incidentTotalMomentum)
|
|---|
| 1876 | {
|
|---|
| 1877 | if ((incidentCharge > 0.5) && (maxpip != 0))
|
|---|
| 1878 | {
|
|---|
| 1879 | G4ParticleMomentum mompi0 = pv[maxpi0].getMomentum();
|
|---|
| 1880 | pv[maxpi0].setMomentumAndUpdate( pv[maxpip].getMomentum() );
|
|---|
| 1881 | pv[maxpip].setMomentumAndUpdate( mompi0);
|
|---|
| 1882 | if(verboseLevel > 1)
|
|---|
| 1883 | {
|
|---|
| 1884 | G4cout << " exchange Momentum for " << maxpi0 << " and " << maxpip << G4endl;
|
|---|
| 1885 | }
|
|---|
| 1886 | }
|
|---|
| 1887 | else if ((incidentCharge < -0.5) && (maxpim != 0))
|
|---|
| 1888 | {
|
|---|
| 1889 | G4ParticleMomentum mompi0 = pv[maxpi0].getMomentum();
|
|---|
| 1890 | pv[maxpi0].setMomentumAndUpdate( pv[maxpim].getMomentum() );
|
|---|
| 1891 | pv[maxpim].setMomentumAndUpdate( mompi0);
|
|---|
| 1892 | if(verboseLevel > 1)
|
|---|
| 1893 | {
|
|---|
| 1894 | G4cout << " exchange Momentum for " << maxpi0 << " and " << maxpip << G4endl;
|
|---|
| 1895 | }
|
|---|
| 1896 | }
|
|---|
| 1897 | }
|
|---|
| 1898 | }
|
|---|
| 1899 | G4double bntot = - incidentParticle.getBaryonNumber() - atomicWeight;
|
|---|
| 1900 | for (i=0; i<vecLen; i++) bntot += pv[i].getBaryonNumber();
|
|---|
| 1901 | if(atomicWeight < 1.5) { bntot = 0.; }
|
|---|
| 1902 | else { bntot = 1. + bntot/atomicWeight; }
|
|---|
| 1903 | if(atomicWeight > (75.+G4UniformRand()*50.)) bntot = 0.;
|
|---|
| 1904 | if(verboseLevel > 1)
|
|---|
| 1905 | {
|
|---|
| 1906 | G4cout << " Calculated Baryon- Number " << bntot << G4endl;
|
|---|
| 1907 | }
|
|---|
| 1908 |
|
|---|
| 1909 | j = 0;
|
|---|
| 1910 | for (i=0; i<vecLen; i++)
|
|---|
| 1911 | {
|
|---|
| 1912 | G4double ppp = pv[i].Length();
|
|---|
| 1913 | if ( ppp > 1.e-6)
|
|---|
| 1914 | {
|
|---|
| 1915 | iphmf = pv[i].getCode();
|
|---|
| 1916 | if( (bntot > 0.3)
|
|---|
| 1917 | && ((iphmf == protonCode) || (iphmf == neutronCode)
|
|---|
| 1918 | || (pv[i].getType() == "Nucleus") )
|
|---|
| 1919 | && (G4UniformRand() < 0.25)
|
|---|
| 1920 | && (ppp < 1.2) )
|
|---|
| 1921 | {
|
|---|
| 1922 | if(verboseLevel > 1)
|
|---|
| 1923 | {
|
|---|
| 1924 | G4cout << " skip Baryon: " << G4endl;
|
|---|
| 1925 | pv[i].Print(i);
|
|---|
| 1926 | }
|
|---|
| 1927 | continue;
|
|---|
| 1928 |
|
|---|
| 1929 | }
|
|---|
| 1930 | if (j != i)
|
|---|
| 1931 | {
|
|---|
| 1932 | pv[j] = pv[i];
|
|---|
| 1933 | }
|
|---|
| 1934 | j++;
|
|---|
| 1935 | }
|
|---|
| 1936 | }
|
|---|
| 1937 | vecLen = j;
|
|---|
| 1938 | }
|
|---|
| 1939 |
|
|---|
| 1940 | pvmx[0] = incidentParticle;
|
|---|
| 1941 | pvmx[1] = targetParticle;
|
|---|
| 1942 | pvmx[8].setZero();
|
|---|
| 1943 | pvmx[2].Add(pvmx[0], pvmx[1]);
|
|---|
| 1944 | pvmx[3].Lor(pvmx[0], pvmx[2]);
|
|---|
| 1945 | pvmx[4].Lor(pvmx[1], pvmx[2]);
|
|---|
| 1946 |
|
|---|
| 1947 | if (verboseLevel > 1) {
|
|---|
| 1948 | pvmx[0].Print(0);
|
|---|
| 1949 | incidentParticle.Print(0);
|
|---|
| 1950 | pvmx[1].Print(1);
|
|---|
| 1951 | targetParticle.Print(1);
|
|---|
| 1952 | pvmx[2].Print(2);
|
|---|
| 1953 | pvmx[3].Print(3);
|
|---|
| 1954 | pvmx[4].Print(4);
|
|---|
| 1955 | }
|
|---|
| 1956 |
|
|---|
| 1957 | // Calculate leading particle effect in which a single final state
|
|---|
| 1958 | // particle carries away nearly the maximum allowed momentum, while
|
|---|
| 1959 | // all other secondaries have reduced momentum. A secondary is
|
|---|
| 1960 | // proportionately less likely to be a leading particle as the
|
|---|
| 1961 | // difference of its quantum numbers with the primary increases.
|
|---|
| 1962 |
|
|---|
| 1963 | G4int ledpar = -1;
|
|---|
| 1964 | G4double redpar = 0.;
|
|---|
| 1965 | G4int incidentS = incidentParticle.getStrangenessNumber();
|
|---|
| 1966 | if (incidentParticle.getName() == "KaonZeroShort" ||
|
|---|
| 1967 | incidentParticle.getName() == "KaonZeroLong") {
|
|---|
| 1968 | if(G4UniformRand() < 0.5) {
|
|---|
| 1969 | incidentS = 1;
|
|---|
| 1970 | } else {
|
|---|
| 1971 | incidentS = -1;
|
|---|
| 1972 | }
|
|---|
| 1973 | }
|
|---|
| 1974 |
|
|---|
| 1975 | G4int incidentB = incidentParticle.getBaryonNumber();
|
|---|
| 1976 |
|
|---|
| 1977 | for (i=0; i<vecLen; i++) {
|
|---|
| 1978 | G4int iphmf = pv[i].getCode();
|
|---|
| 1979 | G4double ppp = pv[i].Length();
|
|---|
| 1980 |
|
|---|
| 1981 | if (ppp > 1.e-3) {
|
|---|
| 1982 | pvmx[5].Lor( pv[i], pvmx[2] ); // secondary in CM frame
|
|---|
| 1983 | G4double cost = pvmx[3].CosAng( pvmx[5] );
|
|---|
| 1984 |
|
|---|
| 1985 | // For each secondary, find the sum of the differences of its
|
|---|
| 1986 | // quantum numbers with that of the incident particle
|
|---|
| 1987 | // (dM + dQ + dS + dB)
|
|---|
| 1988 |
|
|---|
| 1989 | G4int particleS = pv[i].getStrangenessNumber();
|
|---|
| 1990 |
|
|---|
| 1991 | if (pv[i].getName() == "KaonZeroShort" ||
|
|---|
| 1992 | pv[i].getName() == "KaonZeroLong") {
|
|---|
| 1993 | if (G4UniformRand() < 0.5) {
|
|---|
| 1994 | particleS = 1;
|
|---|
| 1995 | } else {
|
|---|
| 1996 | particleS = -1;
|
|---|
| 1997 | }
|
|---|
| 1998 | }
|
|---|
| 1999 | G4int particleB = pv[i].getBaryonNumber();
|
|---|
| 2000 | G4double hfmass;
|
|---|
| 2001 | if (cost > 0.) {
|
|---|
| 2002 | reddec[0] = std::fabs( incidentMass - pv[i].getMass() );
|
|---|
| 2003 | reddec[1] = std::fabs( incidentCharge - pv[i].getCharge());
|
|---|
| 2004 | reddec[2] = std::fabs( G4double(incidentS - particleS) ); // cast for aCC
|
|---|
| 2005 | reddec[3] = std::fabs( G4double(incidentB - particleB) ); // cast for aCC
|
|---|
| 2006 | hfmass = incidentMass;
|
|---|
| 2007 |
|
|---|
| 2008 | } else {
|
|---|
| 2009 | reddec[0] = std::fabs( targetMass - pv[i].getMass() );
|
|---|
| 2010 | reddec[1] = std::fabs( atomicNumber/atomicWeight - pv[i].getCharge());
|
|---|
| 2011 | reddec[2] = std::fabs( G4double(particleS) ); // cast for aCC
|
|---|
| 2012 | reddec[3] = std::fabs( 1. - particleB );
|
|---|
| 2013 | hfmass = targetMass;
|
|---|
| 2014 | }
|
|---|
| 2015 |
|
|---|
| 2016 | reddec[5] = reddec[0]+reddec[1]+reddec[2]+reddec[3];
|
|---|
| 2017 | G4double sbqwgt = reddec[5];
|
|---|
| 2018 | if (hfmass < 0.2) {
|
|---|
| 2019 | sbqwgt = (sbqwgt-2.5)*0.10;
|
|---|
| 2020 | if(pv[i].getCode() == pionZeroCode) sbqwgt = 0.15;
|
|---|
| 2021 | } else if (hfmass < 0.6) {
|
|---|
| 2022 | sbqwgt = (sbqwgt-3.0)*0.10;
|
|---|
| 2023 | } else {
|
|---|
| 2024 | sbqwgt = (sbqwgt-2.0)*0.10;
|
|---|
| 2025 | if(pv[i].getCode() == pionZeroCode) sbqwgt = 0.15;
|
|---|
| 2026 | }
|
|---|
| 2027 |
|
|---|
| 2028 | ppp = pvmx[5].Length();
|
|---|
| 2029 |
|
|---|
| 2030 | // Reduce the longitudinal momentum of the secondary by a factor
|
|---|
| 2031 | // which is a function of the sum of the differences
|
|---|
| 2032 |
|
|---|
| 2033 | if (sbqwgt > 0. && ppp > 1.e-6) {
|
|---|
| 2034 | G4double pthmf = ppp*std::sqrt(1.-cost*cost);
|
|---|
| 2035 | G4double plhmf = ppp*cost*(1.-sbqwgt);
|
|---|
| 2036 | pvmx[7].Cross( pvmx[3], pvmx[5] );
|
|---|
| 2037 | pvmx[7].Cross( pvmx[7], pvmx[3] );
|
|---|
| 2038 |
|
|---|
| 2039 | if (pvmx[3].Length() > 0.)
|
|---|
| 2040 | pvmx[6].SmulAndUpdate( pvmx[3], plhmf/pvmx[3].Length() );
|
|---|
| 2041 | else if(verboseLevel > 1)
|
|---|
| 2042 | G4cout << "NaNQ in Tuning of High Energy Hadronic Interactions" << G4endl;
|
|---|
| 2043 |
|
|---|
| 2044 | if (pvmx[7].Length() > 0.)
|
|---|
| 2045 | pvmx[7].SmulAndUpdate( pvmx[7], pthmf/pvmx[7].Length() );
|
|---|
| 2046 | else if(verboseLevel > 1)
|
|---|
| 2047 | G4cout << "NaNQ in Tuning of High Energy Hadronic Interactions" << G4endl;
|
|---|
| 2048 |
|
|---|
| 2049 | pvmx[5].Add3(pvmx[6], pvmx[7] );
|
|---|
| 2050 | pvmx[5].setEnergy( std::sqrt(sqr(pvmx[5].Length()) + sqr(pv[i].getMass())));
|
|---|
| 2051 | pv[i].Lor( pvmx[5], pvmx[4] );
|
|---|
| 2052 | if (verboseLevel > 1) {
|
|---|
| 2053 | G4cout << " Particle Momentum changed to: " << G4endl;
|
|---|
| 2054 | pv[i].Print(i);
|
|---|
| 2055 | }
|
|---|
| 2056 | }
|
|---|
| 2057 |
|
|---|
| 2058 | // Choose leading particle
|
|---|
| 2059 | // Neither pi0s, backward nucleons from intra-nuclear cascade,
|
|---|
| 2060 | // nor evaporation fragments can be leading particles
|
|---|
| 2061 |
|
|---|
| 2062 | G4int ss = -3;
|
|---|
| 2063 | if (incidentS != 0) ss = 0;
|
|---|
| 2064 | if (iphmf != pionZeroCode && pv[i].getSide() > ss) {
|
|---|
| 2065 | pvmx[7].Sub3( incidentParticle, pv[i] );
|
|---|
| 2066 | reddec[4] = pvmx[7].Length()/incidentTotalMomentum;
|
|---|
| 2067 | reddec[6] = reddec[4]*2./3. + reddec[5]/12.;
|
|---|
| 2068 | reddec[6] = Amax(0., 1. - reddec[6]);
|
|---|
| 2069 | if ( (reddec[5] <= 3.75) && (reddec[6] > redpar) ) {
|
|---|
| 2070 | ledpar = i;
|
|---|
| 2071 | redpar = reddec[6];
|
|---|
| 2072 | }
|
|---|
| 2073 | }
|
|---|
| 2074 | }
|
|---|
| 2075 | pvmx[8].Add3(pvmx[8], pv[i] );
|
|---|
| 2076 | }
|
|---|
| 2077 |
|
|---|
| 2078 | if(false) if (ledpar >= 0)
|
|---|
| 2079 | {
|
|---|
| 2080 | if(verboseLevel > 1)
|
|---|
| 2081 | {
|
|---|
| 2082 | G4cout << " Leading Particle found : " << ledpar << G4endl;
|
|---|
| 2083 | pv[ledpar].Print(ledpar);
|
|---|
| 2084 | pvmx[8].Print(-2);
|
|---|
| 2085 | incidentParticle.Print(-1);
|
|---|
| 2086 | }
|
|---|
| 2087 | pvmx[4].Sub3(incidentParticle,pvmx[8]);
|
|---|
| 2088 | pvmx[5].Smul(incidentParticle, incidentParticle.CosAng(pvmx[4])
|
|---|
| 2089 | *pvmx[4].Length()/incidentParticle.Length());
|
|---|
| 2090 | pv[ledpar].Add3(pv[ledpar],pvmx[5]);
|
|---|
| 2091 |
|
|---|
| 2092 | pv[ledpar].SmulAndUpdate( pv[ledpar], 1.);
|
|---|
| 2093 | if(verboseLevel > 1)
|
|---|
| 2094 | {
|
|---|
| 2095 | pv[ledpar].Print(ledpar);
|
|---|
| 2096 | }
|
|---|
| 2097 | }
|
|---|
| 2098 |
|
|---|
| 2099 | if (conserveEnergy) {
|
|---|
| 2100 | G4double ekinhf = 0.;
|
|---|
| 2101 | for (i=0; i<vecLen; i++) {
|
|---|
| 2102 | ekinhf += pv[i].getKineticEnergy();
|
|---|
| 2103 | if(pv[i].getMass() < 0.7) ekinhf += pv[i].getMass();
|
|---|
| 2104 | }
|
|---|
| 2105 | if(incidentParticle.getMass() < 0.7) ekinhf -= incidentParticle.getMass();
|
|---|
| 2106 |
|
|---|
| 2107 | if(ledpar < 0) { // no leading particle chosen
|
|---|
| 2108 | ekinhf = incidentParticle.getKineticEnergy()/ekinhf;
|
|---|
| 2109 | for (i=0; i<vecLen; i++)
|
|---|
| 2110 | pv[i].setKineticEnergyAndUpdate(ekinhf*pv[i].getKineticEnergy());
|
|---|
| 2111 |
|
|---|
| 2112 | } else {
|
|---|
| 2113 | // take the energy removed from non-leading particles and
|
|---|
| 2114 | // give it to the leading particle
|
|---|
| 2115 | ekinhf = incidentParticle.getKineticEnergy() - ekinhf;
|
|---|
| 2116 | ekinhf += pv[ledpar].getKineticEnergy();
|
|---|
| 2117 | if(ekinhf < 0.) ekinhf = 0.;
|
|---|
| 2118 | pv[ledpar].setKineticEnergyAndUpdate(ekinhf);
|
|---|
| 2119 | }
|
|---|
| 2120 | }
|
|---|
| 2121 |
|
|---|
| 2122 | delete [] reddec;
|
|---|
| 2123 | delete [] pvmx;
|
|---|
| 2124 |
|
|---|
| 2125 | return;
|
|---|
| 2126 | }
|
|---|
| 2127 |
|
|---|
| 2128 | void
|
|---|
| 2129 | G4HEInelastic::HighEnergyClusterProduction(G4bool &successful,
|
|---|
| 2130 | G4HEVector pv[],
|
|---|
| 2131 | G4int &vecLen,
|
|---|
| 2132 | G4double &excitationEnergyGNP,
|
|---|
| 2133 | G4double &excitationEnergyDTA,
|
|---|
| 2134 | G4HEVector incidentParticle,
|
|---|
| 2135 | G4HEVector targetParticle,
|
|---|
| 2136 | G4double atomicWeight,
|
|---|
| 2137 | G4double atomicNumber)
|
|---|
| 2138 | {
|
|---|
| 2139 | // For low multiplicity in the first intranuclear interaction the cascading process
|
|---|
| 2140 | // as described in G4HEInelastic::MediumEnergyCascading does not work
|
|---|
| 2141 | // satisfactorily. From experimental data it is strongly suggested to use
|
|---|
| 2142 | // a two- body resonance model.
|
|---|
| 2143 | //
|
|---|
| 2144 | // All quantities on the G4HEVector Array pv are in GeV- units.
|
|---|
| 2145 |
|
|---|
| 2146 | G4int protonCode = Proton.getCode();
|
|---|
| 2147 | G4double protonMass = Proton.getMass();
|
|---|
| 2148 | G4int neutronCode = Neutron.getCode();
|
|---|
| 2149 | G4double kaonPlusMass = KaonPlus.getMass();
|
|---|
| 2150 | G4int pionPlusCode = PionPlus.getCode();
|
|---|
| 2151 | G4int pionZeroCode = PionZero.getCode();
|
|---|
| 2152 | G4int pionMinusCode = PionMinus.getCode();
|
|---|
| 2153 | G4String mesonType = PionPlus.getType();
|
|---|
| 2154 | G4String baryonType = Proton.getType();
|
|---|
| 2155 | G4String antiBaryonType= AntiProton.getType();
|
|---|
| 2156 |
|
|---|
| 2157 | G4double targetMass = targetParticle.getMass();
|
|---|
| 2158 |
|
|---|
| 2159 | G4int incidentCode = incidentParticle.getCode();
|
|---|
| 2160 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 2161 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 2162 | G4double incidentEnergy = incidentParticle.getEnergy();
|
|---|
| 2163 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 2164 | G4String incidentType = incidentParticle.getType();
|
|---|
| 2165 | // G4double incidentTOF = incidentParticle.getTOF();
|
|---|
| 2166 | G4double incidentTOF = 0.;
|
|---|
| 2167 |
|
|---|
| 2168 | // some local variables
|
|---|
| 2169 |
|
|---|
| 2170 | G4int i, j;
|
|---|
| 2171 |
|
|---|
| 2172 | if(verboseLevel > 1) G4cout << " G4HEInelastic::HighEnergyClusterProduction " << G4endl;
|
|---|
| 2173 |
|
|---|
| 2174 | successful = false;
|
|---|
| 2175 | if(incidentTotalMomentum < 25. + G4UniformRand()*25.) return;
|
|---|
| 2176 |
|
|---|
| 2177 | G4double centerOfMassEnergy = std::sqrt( sqr(incidentMass) + sqr(targetMass)
|
|---|
| 2178 | +2.*targetMass*incidentEnergy);
|
|---|
| 2179 |
|
|---|
| 2180 | G4HEVector pvI = incidentParticle; // for the incident particle
|
|---|
| 2181 | pvI.setSide( 1 );
|
|---|
| 2182 |
|
|---|
| 2183 | G4HEVector pvT = targetParticle; // for the target particle
|
|---|
| 2184 | pvT.setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 2185 | pvT.setSide( -1 );
|
|---|
| 2186 | pvT.setTOF( -1.);
|
|---|
| 2187 | // distribute particles in forward and backward
|
|---|
| 2188 | // hemispheres. Note that only low multiplicity
|
|---|
| 2189 | // events from FirstIntInNuc.... should go into
|
|---|
| 2190 | // this routine.
|
|---|
| 2191 | G4int targ = 0;
|
|---|
| 2192 | G4int ifor = 0;
|
|---|
| 2193 | G4int iback = 0;
|
|---|
| 2194 | G4int pvCode;
|
|---|
| 2195 | G4double pvMass, pvEnergy;
|
|---|
| 2196 |
|
|---|
| 2197 | pv[0].setSide( 1 );
|
|---|
| 2198 | pv[1].setSide( -1 );
|
|---|
| 2199 | for(i = 0; i < vecLen; i++)
|
|---|
| 2200 | {
|
|---|
| 2201 | if (i > 1)
|
|---|
| 2202 | {
|
|---|
| 2203 | if( G4UniformRand() < 0.5)
|
|---|
| 2204 | {
|
|---|
| 2205 | pv[i].setSide( 1 );
|
|---|
| 2206 | if (++ifor > 18)
|
|---|
| 2207 | {
|
|---|
| 2208 | pv[i].setSide( -1 );
|
|---|
| 2209 | ifor--;
|
|---|
| 2210 | iback++;
|
|---|
| 2211 | }
|
|---|
| 2212 | }
|
|---|
| 2213 | else
|
|---|
| 2214 | {
|
|---|
| 2215 | pv[i].setSide( -1 );
|
|---|
| 2216 | if (++iback > 18)
|
|---|
| 2217 | {
|
|---|
| 2218 | pv[i].setSide( 1 );
|
|---|
| 2219 | ifor++;
|
|---|
| 2220 | iback--;
|
|---|
| 2221 | }
|
|---|
| 2222 | }
|
|---|
| 2223 | }
|
|---|
| 2224 |
|
|---|
| 2225 | pvCode = pv[i].getCode();
|
|---|
| 2226 |
|
|---|
| 2227 | if ( ( (incidentCode == protonCode) || (incidentCode == neutronCode)
|
|---|
| 2228 | || (incidentType == mesonType) )
|
|---|
| 2229 | && ( (pvCode == pionPlusCode) || (pvCode == pionMinusCode) )
|
|---|
| 2230 | && ( (G4UniformRand() < (10.-incidentTotalMomentum)/6.) )
|
|---|
| 2231 | && ( (G4UniformRand() < atomicWeight/300.) ) )
|
|---|
| 2232 | {
|
|---|
| 2233 | if (G4UniformRand() > atomicNumber/atomicWeight)
|
|---|
| 2234 | pv[i].setDefinition( "Neutron" );
|
|---|
| 2235 | else
|
|---|
| 2236 | pv[i].setDefinition( "Proton" );
|
|---|
| 2237 | targ++;
|
|---|
| 2238 | }
|
|---|
| 2239 | pv[i].setTOF( incidentTOF );
|
|---|
| 2240 | }
|
|---|
| 2241 | G4double tb = 2. * iback;
|
|---|
| 2242 | if (centerOfMassEnergy < (2+G4UniformRand())) tb = (2.*iback + vecLen)/2.;
|
|---|
| 2243 |
|
|---|
| 2244 | G4double nucsup[] = { 1.0, 0.7, 0.5, 0.4, 0.35, 0.3};
|
|---|
| 2245 | G4double psup[] = { 3. , 6. , 20., 50., 100.,1000.};
|
|---|
| 2246 | G4double s = centerOfMassEnergy*centerOfMassEnergy;
|
|---|
| 2247 |
|
|---|
| 2248 | G4double xtarg = Amax(0.01, Amin(0.50, 0.312+0.2*std::log(std::log(s))+std::pow(s,1.5)/6000.)
|
|---|
| 2249 | * (std::pow(atomicWeight,0.33)-1.) * tb);
|
|---|
| 2250 | G4int momentumBin = 0;
|
|---|
| 2251 | while( (momentumBin < 6) && (incidentTotalMomentum > psup[momentumBin])) momentumBin++;
|
|---|
| 2252 | momentumBin = Imin(5, momentumBin);
|
|---|
| 2253 | G4double xpnhmf = Amax(0.01,xtarg*nucsup[momentumBin]);
|
|---|
| 2254 | G4double xshhmf = Amax(0.01,xtarg-xpnhmf);
|
|---|
| 2255 | G4double rshhmf = 0.25*xshhmf;
|
|---|
| 2256 | G4double rpnhmf = 0.81*xpnhmf;
|
|---|
| 2257 | G4double xhmf;
|
|---|
| 2258 | G4int nshhmf, npnhmf;
|
|---|
| 2259 | if (rshhmf > 1.1)
|
|---|
| 2260 | {
|
|---|
| 2261 | rshhmf = xshhmf/(rshhmf-1.);
|
|---|
| 2262 | if (rshhmf <= 20.)
|
|---|
| 2263 | xhmf = GammaRand( rshhmf );
|
|---|
| 2264 | else
|
|---|
| 2265 | xhmf = Erlang( G4int(rshhmf+0.5) );
|
|---|
| 2266 | xshhmf *= xhmf/rshhmf;
|
|---|
| 2267 | }
|
|---|
| 2268 | nshhmf = Poisson( xshhmf );
|
|---|
| 2269 | if (rpnhmf > 1.1)
|
|---|
| 2270 | {
|
|---|
| 2271 | rpnhmf = xpnhmf/(rpnhmf -1.);
|
|---|
| 2272 | if (rpnhmf <= 20.)
|
|---|
| 2273 | xhmf = GammaRand( rpnhmf );
|
|---|
| 2274 | else
|
|---|
| 2275 | xhmf = Erlang( G4int(rpnhmf+0.5) );
|
|---|
| 2276 | xpnhmf *= xhmf/rpnhmf;
|
|---|
| 2277 | }
|
|---|
| 2278 | npnhmf = Poisson( xpnhmf );
|
|---|
| 2279 |
|
|---|
| 2280 | while (npnhmf > 0)
|
|---|
| 2281 | {
|
|---|
| 2282 | if ( G4UniformRand() > (1. - atomicNumber/atomicWeight))
|
|---|
| 2283 | pv[vecLen].setDefinition( "Proton" );
|
|---|
| 2284 | else
|
|---|
| 2285 | pv[vecLen].setDefinition( "Neutron" );
|
|---|
| 2286 | targ++;
|
|---|
| 2287 | pv[vecLen].setSide( -2 );
|
|---|
| 2288 | pv[vecLen].setFlag( true );
|
|---|
| 2289 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 2290 | vecLen++;
|
|---|
| 2291 | npnhmf--;
|
|---|
| 2292 | }
|
|---|
| 2293 | while (nshhmf > 0)
|
|---|
| 2294 | {
|
|---|
| 2295 | G4double ran = G4UniformRand();
|
|---|
| 2296 | if (ran < 0.333333 )
|
|---|
| 2297 | pv[vecLen].setDefinition( "PionPlus" );
|
|---|
| 2298 | else if (ran < 0.6667)
|
|---|
| 2299 | pv[vecLen].setDefinition( "PionZero" );
|
|---|
| 2300 | else
|
|---|
| 2301 | pv[vecLen].setDefinition( "PionMinus" );
|
|---|
| 2302 | pv[vecLen].setSide( -2 );
|
|---|
| 2303 | pv[vecLen].setFlag( true );
|
|---|
| 2304 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 2305 | vecLen++;
|
|---|
| 2306 | nshhmf--;
|
|---|
| 2307 | }
|
|---|
| 2308 |
|
|---|
| 2309 | // Mark leading particles for incident strange particles
|
|---|
| 2310 | // and antibaryons, for all other we assume that the first
|
|---|
| 2311 | // and second particle are the leading particles.
|
|---|
| 2312 | // We need this later for kinematic aspects of strangeness conservation.
|
|---|
| 2313 |
|
|---|
| 2314 | G4int lead = 0;
|
|---|
| 2315 | G4HEVector leadParticle;
|
|---|
| 2316 | if( (incidentMass >= kaonPlusMass-0.05) && (incidentCode != protonCode)
|
|---|
| 2317 | && (incidentCode != neutronCode) )
|
|---|
| 2318 | {
|
|---|
| 2319 | G4double pMass = pv[0].getMass();
|
|---|
| 2320 | G4int pCode = pv[0].getCode();
|
|---|
| 2321 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 2322 | && (pCode != neutronCode) )
|
|---|
| 2323 | {
|
|---|
| 2324 | lead = pCode;
|
|---|
| 2325 | leadParticle = pv[0];
|
|---|
| 2326 | }
|
|---|
| 2327 | else
|
|---|
| 2328 | {
|
|---|
| 2329 | pMass = pv[1].getMass();
|
|---|
| 2330 | pCode = pv[1].getCode();
|
|---|
| 2331 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 2332 | && (pCode != neutronCode) )
|
|---|
| 2333 | {
|
|---|
| 2334 | lead = pCode;
|
|---|
| 2335 | leadParticle = pv[1];
|
|---|
| 2336 | }
|
|---|
| 2337 | }
|
|---|
| 2338 | }
|
|---|
| 2339 |
|
|---|
| 2340 | if (verboseLevel > 1)
|
|---|
| 2341 | { G4cout << " pv Vector after initialization " << vecLen << G4endl;
|
|---|
| 2342 | pvI.Print(-1);
|
|---|
| 2343 | pvT.Print(-1);
|
|---|
| 2344 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 2345 | }
|
|---|
| 2346 |
|
|---|
| 2347 | G4double tavai = 0.;
|
|---|
| 2348 | for(i=0;i<vecLen;i++) if(pv[i].getSide() != -2) tavai += pv[i].getMass();
|
|---|
| 2349 |
|
|---|
| 2350 | while (tavai > centerOfMassEnergy)
|
|---|
| 2351 | {
|
|---|
| 2352 | for (i=vecLen-1; i >= 0; i--)
|
|---|
| 2353 | {
|
|---|
| 2354 | if (pv[i].getSide() != -2)
|
|---|
| 2355 | {
|
|---|
| 2356 | tavai -= pv[i].getMass();
|
|---|
| 2357 | if( i != vecLen-1)
|
|---|
| 2358 | {
|
|---|
| 2359 | for (j=i; j < vecLen; j++)
|
|---|
| 2360 | {
|
|---|
| 2361 | pv[j] = pv[j+1];
|
|---|
| 2362 | }
|
|---|
| 2363 | }
|
|---|
| 2364 | if ( --vecLen < 2)
|
|---|
| 2365 | {
|
|---|
| 2366 | successful = false;
|
|---|
| 2367 | return;
|
|---|
| 2368 | }
|
|---|
| 2369 | break;
|
|---|
| 2370 | }
|
|---|
| 2371 | }
|
|---|
| 2372 | }
|
|---|
| 2373 |
|
|---|
| 2374 | // Now produce 3 Clusters:
|
|---|
| 2375 | // 1. forward cluster
|
|---|
| 2376 | // 2. backward meson cluster
|
|---|
| 2377 | // 3. backward nucleon cluster
|
|---|
| 2378 |
|
|---|
| 2379 | G4double rmc0 = 0., rmd0 = 0., rme0 = 0.;
|
|---|
| 2380 | G4int ntc = 0, ntd = 0, nte = 0;
|
|---|
| 2381 |
|
|---|
| 2382 | for (i=0; i < vecLen; i++)
|
|---|
| 2383 | {
|
|---|
| 2384 | if(pv[i].getSide() > 0)
|
|---|
| 2385 | {
|
|---|
| 2386 | if(ntc < 17)
|
|---|
| 2387 | {
|
|---|
| 2388 | rmc0 += pv[i].getMass();
|
|---|
| 2389 | ntc++;
|
|---|
| 2390 | }
|
|---|
| 2391 | else
|
|---|
| 2392 | {
|
|---|
| 2393 | if(ntd < 17)
|
|---|
| 2394 | {
|
|---|
| 2395 | pv[i].setSide(-1);
|
|---|
| 2396 | rmd0 += pv[i].getMass();
|
|---|
| 2397 | ntd++;
|
|---|
| 2398 | }
|
|---|
| 2399 | else
|
|---|
| 2400 | {
|
|---|
| 2401 | pv[i].setSide(-2);
|
|---|
| 2402 | rme0 += pv[i].getMass();
|
|---|
| 2403 | nte++;
|
|---|
| 2404 | }
|
|---|
| 2405 | }
|
|---|
| 2406 | }
|
|---|
| 2407 | else if (pv[i].getSide() == -1)
|
|---|
| 2408 | {
|
|---|
| 2409 | if(ntd < 17)
|
|---|
| 2410 | {
|
|---|
| 2411 | rmd0 += pv[i].getMass();
|
|---|
| 2412 | ntd++;
|
|---|
| 2413 | }
|
|---|
| 2414 | else
|
|---|
| 2415 | {
|
|---|
| 2416 | pv[i].setSide(-2);
|
|---|
| 2417 | rme0 += pv[i].getMass();
|
|---|
| 2418 | nte++;
|
|---|
| 2419 | }
|
|---|
| 2420 | }
|
|---|
| 2421 | else
|
|---|
| 2422 | {
|
|---|
| 2423 | rme0 += pv[i].getMass();
|
|---|
| 2424 | nte++;
|
|---|
| 2425 | }
|
|---|
| 2426 | }
|
|---|
| 2427 |
|
|---|
| 2428 | G4double cpar[] = {0.6, 0.6, 0.35, 0.15, 0.10};
|
|---|
| 2429 | G4double gpar[] = {2.6, 2.6, 1.80, 1.30, 1.20};
|
|---|
| 2430 |
|
|---|
| 2431 | G4double rmc = rmc0, rmd = rmd0, rme = rme0;
|
|---|
| 2432 | G4int ntc1 = Imin(4,ntc-1);
|
|---|
| 2433 | G4int ntd1 = Imin(4,ntd-1);
|
|---|
| 2434 | G4int nte1 = Imin(4,nte-1);
|
|---|
| 2435 | if (ntc > 1) rmc = rmc0 + std::pow(-std::log(1.-G4UniformRand()),cpar[ntc1])/gpar[ntc1];
|
|---|
| 2436 | if (ntd > 1) rmd = rmd0 + std::pow(-std::log(1.-G4UniformRand()),cpar[ntd1])/gpar[ntd1];
|
|---|
| 2437 | if (nte > 1) rme = rme0 + std::pow(-std::log(1.-G4UniformRand()),cpar[nte1])/gpar[nte1];
|
|---|
| 2438 | while( (rmc+rmd) > centerOfMassEnergy)
|
|---|
| 2439 | {
|
|---|
| 2440 | if ((rmc == rmc0) && (rmd == rmd0))
|
|---|
| 2441 | {
|
|---|
| 2442 | rmd *= 0.999*centerOfMassEnergy/(rmc+rmd);
|
|---|
| 2443 | rmc *= 0.999*centerOfMassEnergy/(rmc+rmd);
|
|---|
| 2444 | }
|
|---|
| 2445 | else
|
|---|
| 2446 | {
|
|---|
| 2447 | rmc = 0.1*rmc0 + 0.9*rmc;
|
|---|
| 2448 | rmd = 0.1*rmd0 + 0.9*rmd;
|
|---|
| 2449 | }
|
|---|
| 2450 | }
|
|---|
| 2451 | if(verboseLevel > 1)
|
|---|
| 2452 | G4cout << " Cluster Masses: " << ntc << " " << rmc << " " << ntd
|
|---|
| 2453 | << " " << rmd << " " << nte << " " << rme << G4endl;
|
|---|
| 2454 |
|
|---|
| 2455 | G4HEVector* pvmx = new G4HEVector[11];
|
|---|
| 2456 |
|
|---|
| 2457 | pvmx[1].setMass( incidentMass);
|
|---|
| 2458 | pvmx[1].setMomentumAndUpdate( 0., 0., incidentTotalMomentum);
|
|---|
| 2459 | pvmx[2].setMass( targetMass);
|
|---|
| 2460 | pvmx[2].setMomentumAndUpdate( 0., 0., 0.);
|
|---|
| 2461 | pvmx[0].Add( pvmx[1], pvmx[2] );
|
|---|
| 2462 | pvmx[1].Lor( pvmx[1], pvmx[0] );
|
|---|
| 2463 | pvmx[2].Lor( pvmx[2], pvmx[0] );
|
|---|
| 2464 |
|
|---|
| 2465 | G4double pf = std::sqrt(Amax(0.0001, sqr(sqr(centerOfMassEnergy) + rmd*rmd -rmc*rmc)
|
|---|
| 2466 | - 4*sqr(centerOfMassEnergy)*rmd*rmd))/(2.*centerOfMassEnergy);
|
|---|
| 2467 | pvmx[3].setMass( rmc );
|
|---|
| 2468 | pvmx[4].setMass( rmd );
|
|---|
| 2469 | pvmx[3].setEnergy( std::sqrt(pf*pf + rmc*rmc) );
|
|---|
| 2470 | pvmx[4].setEnergy( std::sqrt(pf*pf + rmd*rmd) );
|
|---|
| 2471 |
|
|---|
| 2472 | G4double tvalue = -MAXFLOAT;
|
|---|
| 2473 | G4double bvalue = Amax(0.01, 4.0 + 1.6*std::log(incidentTotalMomentum));
|
|---|
| 2474 | if (bvalue != 0.0) tvalue = std::log(G4UniformRand())/bvalue;
|
|---|
| 2475 | G4double pin = pvmx[1].Length();
|
|---|
| 2476 | G4double tacmin = sqr( pvmx[1].getEnergy() - pvmx[3].getEnergy()) - sqr( pin - pf);
|
|---|
| 2477 | G4double ctet = Amax(-1., Amin(1., 1.+2.*(tvalue-tacmin)/Amax(1.e-10, 4.*pin*pf)));
|
|---|
| 2478 | G4double stet = std::sqrt(Amax(0., 1.0 - ctet*ctet));
|
|---|
| 2479 | G4double phi = twopi * G4UniformRand();
|
|---|
| 2480 | pvmx[3].setMomentum( pf * stet * std::sin(phi),
|
|---|
| 2481 | pf * stet * std::cos(phi),
|
|---|
| 2482 | pf * ctet );
|
|---|
| 2483 | pvmx[4].Smul( pvmx[3], -1.);
|
|---|
| 2484 |
|
|---|
| 2485 | if (nte > 0)
|
|---|
| 2486 | {
|
|---|
| 2487 | G4double ekit1 = 0.04;
|
|---|
| 2488 | G4double ekit2 = 0.6;
|
|---|
| 2489 | G4double gaval = 1.2;
|
|---|
| 2490 | if (incidentKineticEnergy <= 5.)
|
|---|
| 2491 | {
|
|---|
| 2492 | ekit1 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 2493 | ekit2 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 2494 | }
|
|---|
| 2495 | G4double avalue = (1.-gaval)/(std::pow(ekit2, 1.-gaval)-std::pow(ekit1, 1.-gaval));
|
|---|
| 2496 | for (i=0; i < vecLen; i++)
|
|---|
| 2497 | {
|
|---|
| 2498 | if (pv[i].getSide() == -2)
|
|---|
| 2499 | {
|
|---|
| 2500 | G4double ekit = std::pow(G4UniformRand()*(1.-gaval)/avalue +std::pow(ekit1, 1.-gaval),
|
|---|
| 2501 | 1./(1.-gaval));
|
|---|
| 2502 | pv[i].setKineticEnergyAndUpdate( ekit );
|
|---|
| 2503 | ctet = Amax(-1., Amin(1., std::log(2.23*G4UniformRand()+0.383)/0.96));
|
|---|
| 2504 | stet = std::sqrt( Amax( 0.0, 1. - ctet*ctet ));
|
|---|
| 2505 | phi = G4UniformRand()*twopi;
|
|---|
| 2506 | G4double pp = pv[i].Length();
|
|---|
| 2507 | pv[i].setMomentum( pp * stet * std::sin(phi),
|
|---|
| 2508 | pp * stet * std::cos(phi),
|
|---|
| 2509 | pp * ctet );
|
|---|
| 2510 | pv[i].Lor( pv[i], pvmx[0] );
|
|---|
| 2511 | }
|
|---|
| 2512 | }
|
|---|
| 2513 | }
|
|---|
| 2514 | // pvmx[1] = pvmx[3];
|
|---|
| 2515 | // pvmx[2] = pvmx[4];
|
|---|
| 2516 | pvmx[5].SmulAndUpdate( pvmx[3], -1.);
|
|---|
| 2517 | pvmx[6].SmulAndUpdate( pvmx[4], -1.);
|
|---|
| 2518 |
|
|---|
| 2519 | if (verboseLevel > 1) {
|
|---|
| 2520 | G4cout << " General vectors before Phase space Generation " << G4endl;
|
|---|
| 2521 | for (i=0; i<7; i++) pvmx[i].Print(i);
|
|---|
| 2522 | }
|
|---|
| 2523 |
|
|---|
| 2524 | G4HEVector* tempV = new G4HEVector[18];
|
|---|
| 2525 | G4bool constantCrossSection = true;
|
|---|
| 2526 | G4double wgt;
|
|---|
| 2527 | G4int npg;
|
|---|
| 2528 |
|
|---|
| 2529 | if (ntc > 1)
|
|---|
| 2530 | {
|
|---|
| 2531 | npg = 0;
|
|---|
| 2532 | for (i=0; i < vecLen; i++)
|
|---|
| 2533 | {
|
|---|
| 2534 | if (pv[i].getSide() > 0)
|
|---|
| 2535 | {
|
|---|
| 2536 | tempV[npg++] = pv[i];
|
|---|
| 2537 | }
|
|---|
| 2538 | }
|
|---|
| 2539 | wgt = NBodyPhaseSpace( pvmx[3].getMass(), constantCrossSection, tempV, npg);
|
|---|
| 2540 |
|
|---|
| 2541 | npg = 0;
|
|---|
| 2542 | for (i=0; i < vecLen; i++)
|
|---|
| 2543 | {
|
|---|
| 2544 | if (pv[i].getSide() > 0)
|
|---|
| 2545 | {
|
|---|
| 2546 | pv[i].setMomentum( tempV[npg++].getMomentum());
|
|---|
| 2547 | pv[i].SmulAndUpdate( pv[i], 1. );
|
|---|
| 2548 | pv[i].Lor( pv[i], pvmx[5] );
|
|---|
| 2549 | }
|
|---|
| 2550 | }
|
|---|
| 2551 | }
|
|---|
| 2552 | else if(ntc == 1)
|
|---|
| 2553 | {
|
|---|
| 2554 | for(i=0; i<vecLen; i++)
|
|---|
| 2555 | {
|
|---|
| 2556 | if(pv[i].getSide() > 0) pv[i].setMomentumAndUpdate(pvmx[3].getMomentum());
|
|---|
| 2557 | }
|
|---|
| 2558 | }
|
|---|
| 2559 | else
|
|---|
| 2560 | {
|
|---|
| 2561 | }
|
|---|
| 2562 |
|
|---|
| 2563 | if (ntd > 1)
|
|---|
| 2564 | {
|
|---|
| 2565 | npg = 0;
|
|---|
| 2566 | for (i=0; i < vecLen; i++)
|
|---|
| 2567 | {
|
|---|
| 2568 | if (pv[i].getSide() == -1)
|
|---|
| 2569 | {
|
|---|
| 2570 | tempV[npg++] = pv[i];
|
|---|
| 2571 | }
|
|---|
| 2572 | }
|
|---|
| 2573 | wgt = NBodyPhaseSpace( pvmx[4].getMass(), constantCrossSection, tempV, npg);
|
|---|
| 2574 |
|
|---|
| 2575 | npg = 0;
|
|---|
| 2576 | for (i=0; i < vecLen; i++)
|
|---|
| 2577 | {
|
|---|
| 2578 | if (pv[i].getSide() == -1)
|
|---|
| 2579 | {
|
|---|
| 2580 | pv[i].setMomentum( tempV[npg++].getMomentum());
|
|---|
| 2581 | pv[i].SmulAndUpdate( pv[i], 1.);
|
|---|
| 2582 | pv[i].Lor( pv[i], pvmx[6] );
|
|---|
| 2583 | }
|
|---|
| 2584 | }
|
|---|
| 2585 | }
|
|---|
| 2586 | else if(ntd == 1)
|
|---|
| 2587 | {
|
|---|
| 2588 | for(i=0; i<vecLen; i++)
|
|---|
| 2589 | {
|
|---|
| 2590 | if(pv[i].getSide() == -1) pv[i].setMomentumAndUpdate(pvmx[4].getMomentum());
|
|---|
| 2591 | }
|
|---|
| 2592 | }
|
|---|
| 2593 | else
|
|---|
| 2594 | {
|
|---|
| 2595 | }
|
|---|
| 2596 |
|
|---|
| 2597 | if(verboseLevel > 1)
|
|---|
| 2598 | {
|
|---|
| 2599 | G4cout << " Vectors after PhaseSpace generation " << G4endl;
|
|---|
| 2600 | for(i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 2601 | }
|
|---|
| 2602 |
|
|---|
| 2603 | // Lorentz transformation in lab system
|
|---|
| 2604 |
|
|---|
| 2605 | targ = 0;
|
|---|
| 2606 | for( i=0; i < vecLen; i++ )
|
|---|
| 2607 | {
|
|---|
| 2608 | if( pv[i].getType() == baryonType )targ++;
|
|---|
| 2609 | if( pv[i].getType() == antiBaryonType )targ--;
|
|---|
| 2610 | pv[i].Lor( pv[i], pvmx[2] );
|
|---|
| 2611 | }
|
|---|
| 2612 | if (targ<1) targ = 1;
|
|---|
| 2613 |
|
|---|
| 2614 | if(verboseLevel > 1) {
|
|---|
| 2615 | G4cout << " Transformation in Lab- System " << G4endl;
|
|---|
| 2616 | for(i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 2617 | }
|
|---|
| 2618 |
|
|---|
| 2619 | G4bool dum(0);
|
|---|
| 2620 | G4double ekin, teta;
|
|---|
| 2621 |
|
|---|
| 2622 | if( lead )
|
|---|
| 2623 | {
|
|---|
| 2624 | for( i=0; i<vecLen; i++ )
|
|---|
| 2625 | {
|
|---|
| 2626 | if( pv[i].getCode() == lead )
|
|---|
| 2627 | {
|
|---|
| 2628 | dum = false;
|
|---|
| 2629 | break;
|
|---|
| 2630 | }
|
|---|
| 2631 | }
|
|---|
| 2632 | if( dum )
|
|---|
| 2633 | {
|
|---|
| 2634 | i = 0;
|
|---|
| 2635 |
|
|---|
| 2636 | if( ( (leadParticle.getType() == baryonType ||
|
|---|
| 2637 | leadParticle.getType() == antiBaryonType)
|
|---|
| 2638 | && (pv[1].getType() == baryonType ||
|
|---|
| 2639 | pv[1].getType() == antiBaryonType))
|
|---|
| 2640 | || ( (leadParticle.getType() == mesonType)
|
|---|
| 2641 | && (pv[1].getType() == mesonType)))
|
|---|
| 2642 | {
|
|---|
| 2643 | i = 1;
|
|---|
| 2644 | }
|
|---|
| 2645 |
|
|---|
| 2646 | ekin = pv[i].getKineticEnergy();
|
|---|
| 2647 | pv[i] = leadParticle;
|
|---|
| 2648 | if( pv[i].getFlag() )
|
|---|
| 2649 | pv[i].setTOF( -1.0 );
|
|---|
| 2650 | else
|
|---|
| 2651 | pv[i].setTOF( 1.0 );
|
|---|
| 2652 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 2653 | }
|
|---|
| 2654 | }
|
|---|
| 2655 |
|
|---|
| 2656 | pvmx[4].setMass( incidentMass);
|
|---|
| 2657 | pvmx[4].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 2658 |
|
|---|
| 2659 | G4double ekin0 = pvmx[4].getKineticEnergy();
|
|---|
| 2660 |
|
|---|
| 2661 | pvmx[5].setMass ( protonMass * targ);
|
|---|
| 2662 | pvmx[5].setEnergy( protonMass * targ);
|
|---|
| 2663 | pvmx[5].setKineticEnergy(0.);
|
|---|
| 2664 | pvmx[5].setMomentum( 0.0, 0.0, 0.0 );
|
|---|
| 2665 |
|
|---|
| 2666 | ekin = pvmx[4].getEnergy() + pvmx[5].getEnergy();
|
|---|
| 2667 |
|
|---|
| 2668 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 2669 | pvmx[4].Lor( pvmx[4], pvmx[6] );
|
|---|
| 2670 | pvmx[5].Lor( pvmx[5], pvmx[6] );
|
|---|
| 2671 |
|
|---|
| 2672 | G4double tecm = pvmx[4].getEnergy() + pvmx[5].getEnergy();
|
|---|
| 2673 |
|
|---|
| 2674 | pvmx[8].setZero();
|
|---|
| 2675 |
|
|---|
| 2676 | G4double ekin1 = 0.0;
|
|---|
| 2677 |
|
|---|
| 2678 | for( i=0; i < vecLen; i++ )
|
|---|
| 2679 | {
|
|---|
| 2680 | pvmx[8].Add( pvmx[8], pv[i] );
|
|---|
| 2681 | ekin1 += pv[i].getKineticEnergy();
|
|---|
| 2682 | ekin -= pv[i].getMass();
|
|---|
| 2683 | }
|
|---|
| 2684 |
|
|---|
| 2685 | if( vecLen > 1 && vecLen < 19 )
|
|---|
| 2686 | {
|
|---|
| 2687 | constantCrossSection = true;
|
|---|
| 2688 | G4HEVector pw[18];
|
|---|
| 2689 | for(i=0;i<vecLen;i++) pw[i] = pv[i];
|
|---|
| 2690 | wgt = NBodyPhaseSpace( tecm, constantCrossSection, pw, vecLen );
|
|---|
| 2691 | ekin = 0.0;
|
|---|
| 2692 | for( i=0; i < vecLen; i++ )
|
|---|
| 2693 | {
|
|---|
| 2694 | pvmx[7].setMass( pw[i].getMass());
|
|---|
| 2695 | pvmx[7].setMomentum( pw[i].getMomentum() );
|
|---|
| 2696 | pvmx[7].SmulAndUpdate( pvmx[7], 1.);
|
|---|
| 2697 | pvmx[7].Lor( pvmx[7], pvmx[5] );
|
|---|
| 2698 | ekin += pvmx[7].getKineticEnergy();
|
|---|
| 2699 | }
|
|---|
| 2700 | teta = pvmx[8].Ang( pvmx[4] );
|
|---|
| 2701 | if (verboseLevel > 1)
|
|---|
| 2702 | G4cout << " vecLen > 1 && vecLen < 19 " << teta << " "
|
|---|
| 2703 | << ekin0 << " " << ekin1 << " " << ekin << G4endl;
|
|---|
| 2704 | }
|
|---|
| 2705 |
|
|---|
| 2706 | if( ekin1 != 0.0 )
|
|---|
| 2707 | {
|
|---|
| 2708 | pvmx[7].setZero();
|
|---|
| 2709 | wgt = ekin/ekin1;
|
|---|
| 2710 | ekin1 = 0.;
|
|---|
| 2711 | for( i=0; i < vecLen; i++ )
|
|---|
| 2712 | {
|
|---|
| 2713 | pvMass = pv[i].getMass();
|
|---|
| 2714 | ekin = pv[i].getKineticEnergy() * wgt;
|
|---|
| 2715 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 2716 | ekin1 += ekin;
|
|---|
| 2717 | pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 2718 | }
|
|---|
| 2719 | teta = pvmx[7].Ang( pvmx[4] );
|
|---|
| 2720 | if (verboseLevel > 1)
|
|---|
| 2721 | G4cout << " ekin1 != 0 " << teta << " " << ekin0 << " "
|
|---|
| 2722 | << ekin1 << G4endl;
|
|---|
| 2723 | }
|
|---|
| 2724 |
|
|---|
| 2725 | if(verboseLevel > 1)
|
|---|
| 2726 | {
|
|---|
| 2727 | G4cout << " After energy- correction " << G4endl;
|
|---|
| 2728 | for(i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 2729 | }
|
|---|
| 2730 |
|
|---|
| 2731 | // Do some smearing in the transverse direction due to Fermi motion
|
|---|
| 2732 |
|
|---|
| 2733 | G4double ry = G4UniformRand();
|
|---|
| 2734 | G4double rz = G4UniformRand();
|
|---|
| 2735 | G4double rx = twopi*rz;
|
|---|
| 2736 | G4double a1 = std::sqrt(-2.0*std::log(ry));
|
|---|
| 2737 | G4double rantarg1 = a1*std::cos(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 2738 | G4double rantarg2 = a1*std::sin(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 2739 |
|
|---|
| 2740 | for (i = 0; i < vecLen; i++)
|
|---|
| 2741 | pv[i].setMomentum( pv[i].getMomentum().x()+rantarg1,
|
|---|
| 2742 | pv[i].getMomentum().y()+rantarg2 );
|
|---|
| 2743 |
|
|---|
| 2744 | if (verboseLevel > 1) {
|
|---|
| 2745 | pvmx[7].setZero();
|
|---|
| 2746 | for (i = 0; i < vecLen; i++) pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 2747 | teta = pvmx[7].Ang( pvmx[4] );
|
|---|
| 2748 | G4cout << " After smearing " << teta << G4endl;
|
|---|
| 2749 | }
|
|---|
| 2750 |
|
|---|
| 2751 | // Rotate in the direction of the primary particle momentum (z-axis).
|
|---|
| 2752 | // This does disturb our inclusive distributions somewhat, but it is
|
|---|
| 2753 | // necessary for momentum conservation
|
|---|
| 2754 |
|
|---|
| 2755 | // Also subtract binding energies and make some further corrections
|
|---|
| 2756 | // if required
|
|---|
| 2757 |
|
|---|
| 2758 | G4double dekin = 0.0;
|
|---|
| 2759 | G4int npions = 0;
|
|---|
| 2760 | G4double ek1 = 0.0;
|
|---|
| 2761 | G4double alekw, xxh;
|
|---|
| 2762 | G4double cfa = 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.);
|
|---|
| 2763 | G4double alem[] = {1.40, 2.30, 2.70, 3.00, 3.40, 4.60, 7.00, 10.0};
|
|---|
| 2764 | G4double val0[] = {0.00, 0.40, 0.48, 0.51, 0.54, 0.60, 0.65, 0.70};
|
|---|
| 2765 |
|
|---|
| 2766 |
|
|---|
| 2767 | for (i = 0; i < vecLen; i++)
|
|---|
| 2768 | {
|
|---|
| 2769 | pv[i].Defs1( pv[i], pvI );
|
|---|
| 2770 | if (atomicWeight > 1.5)
|
|---|
| 2771 | {
|
|---|
| 2772 | ekin = Amax( 1.e-6,pv[i].getKineticEnergy() - cfa*( 1. + 0.5*normal()));
|
|---|
| 2773 | alekw = std::log( incidentKineticEnergy );
|
|---|
| 2774 | xxh = 1.;
|
|---|
| 2775 | xxh = 1.;
|
|---|
| 2776 | if(incidentCode == pionPlusCode || incidentCode == pionMinusCode)
|
|---|
| 2777 | {
|
|---|
| 2778 | if(pv[i].getCode() == pionZeroCode)
|
|---|
| 2779 | {
|
|---|
| 2780 | if(G4UniformRand() < std::log(atomicWeight))
|
|---|
| 2781 | {
|
|---|
| 2782 | if (alekw > alem[0])
|
|---|
| 2783 | {
|
|---|
| 2784 | for (j = 1; j < 8; j++)
|
|---|
| 2785 | {
|
|---|
| 2786 | if(alekw < alem[j]) break;
|
|---|
| 2787 | }
|
|---|
| 2788 | xxh = (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alekw
|
|---|
| 2789 | + val0[j-1] - (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alem[j-1];
|
|---|
| 2790 | xxh = 1. - xxh;
|
|---|
| 2791 | }
|
|---|
| 2792 | }
|
|---|
| 2793 | }
|
|---|
| 2794 | }
|
|---|
| 2795 | dekin += ekin*(1.-xxh);
|
|---|
| 2796 | ekin *= xxh;
|
|---|
| 2797 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 2798 | pvCode = pv[i].getCode();
|
|---|
| 2799 | if ((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 2800 | {
|
|---|
| 2801 | npions += 1;
|
|---|
| 2802 | ek1 += ekin;
|
|---|
| 2803 | }
|
|---|
| 2804 | }
|
|---|
| 2805 | }
|
|---|
| 2806 | if( (ek1 > 0.0) && (npions > 0) )
|
|---|
| 2807 | {
|
|---|
| 2808 | dekin = 1.+dekin/ek1;
|
|---|
| 2809 | for (i = 0; i < vecLen; i++)
|
|---|
| 2810 | {
|
|---|
| 2811 | pvCode = pv[i].getCode();
|
|---|
| 2812 | if((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 2813 | {
|
|---|
| 2814 | ekin = Amax( 1.0e-6, pv[i].getKineticEnergy() * dekin );
|
|---|
| 2815 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 2816 | }
|
|---|
| 2817 | }
|
|---|
| 2818 | }
|
|---|
| 2819 | if (verboseLevel > 1)
|
|---|
| 2820 | { G4cout << " Lab-System " << ek1 << " " << npions << G4endl;
|
|---|
| 2821 | for (i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 2822 | }
|
|---|
| 2823 |
|
|---|
| 2824 | // Add black track particles
|
|---|
| 2825 | // The total number of particles produced is restricted to 198
|
|---|
| 2826 | // - this may have influence on very high energies
|
|---|
| 2827 |
|
|---|
| 2828 | if (verboseLevel > 1)
|
|---|
| 2829 | G4cout << " Evaporation " << atomicWeight << " " << excitationEnergyGNP
|
|---|
| 2830 | << " " << excitationEnergyDTA << G4endl;
|
|---|
| 2831 |
|
|---|
| 2832 | G4double sprob = 0.;
|
|---|
| 2833 | if (incidentKineticEnergy > 5. )
|
|---|
| 2834 | // sprob = Amin( 1., (0.394-0.063*std::log(atomicWeight))*std::log(incidentKineticEnergy-4.) );
|
|---|
| 2835 | sprob = Amin(1., 0.000314*atomicWeight*std::log(incidentKineticEnergy-4.));
|
|---|
| 2836 | if( atomicWeight > 1.5 && G4UniformRand() > sprob)
|
|---|
| 2837 | {
|
|---|
| 2838 |
|
|---|
| 2839 | G4double cost, sint, ekin2, ran, pp, eka;
|
|---|
| 2840 | G4int spall(0), nbl(0);
|
|---|
| 2841 |
|
|---|
| 2842 | // first add protons and neutrons
|
|---|
| 2843 |
|
|---|
| 2844 | if( excitationEnergyGNP >= 0.001 )
|
|---|
| 2845 | {
|
|---|
| 2846 | // nbl = number of proton/neutron black track particles
|
|---|
| 2847 | // tex is their total kinetic energy (GeV)
|
|---|
| 2848 |
|
|---|
| 2849 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyGNP/
|
|---|
| 2850 | (excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 2851 | if( targ+nbl > atomicWeight ) nbl = (int)(atomicWeight - targ);
|
|---|
| 2852 | if (verboseLevel > 1)
|
|---|
| 2853 | G4cout << " evaporation " << targ << " " << nbl << " "
|
|---|
| 2854 | << sprob << G4endl;
|
|---|
| 2855 | spall = targ;
|
|---|
| 2856 | if( nbl > 0)
|
|---|
| 2857 | {
|
|---|
| 2858 | ekin = excitationEnergyGNP/nbl;
|
|---|
| 2859 | ekin2 = 0.0;
|
|---|
| 2860 | for( i=0; i<nbl; i++ )
|
|---|
| 2861 | {
|
|---|
| 2862 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 2863 | if( ekin2 > excitationEnergyGNP) break;
|
|---|
| 2864 | ran = G4UniformRand();
|
|---|
| 2865 | ekin1 = -ekin*std::log(ran) - cfa*(1.0+0.5*normal());
|
|---|
| 2866 | if (ekin1 < 0) ekin1 = -0.010*std::log(ran);
|
|---|
| 2867 | ekin2 += ekin1;
|
|---|
| 2868 | if( ekin2 > excitationEnergyGNP)
|
|---|
| 2869 | ekin1 = Amax( 1.0e-6, excitationEnergyGNP-(ekin2-ekin1) );
|
|---|
| 2870 | if( G4UniformRand() > (1.0-atomicNumber/(atomicWeight)))
|
|---|
| 2871 | pv[vecLen].setDefinition( "Proton");
|
|---|
| 2872 | else
|
|---|
| 2873 | pv[vecLen].setDefinition( "Neutron" );
|
|---|
| 2874 | spall++;
|
|---|
| 2875 | cost = G4UniformRand() * 2.0 - 1.0;
|
|---|
| 2876 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 2877 | phi = twopi * G4UniformRand();
|
|---|
| 2878 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 2879 | pv[vecLen].setSide( -4 );
|
|---|
| 2880 | pvMass = pv[vecLen].getMass();
|
|---|
| 2881 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 2882 | pvEnergy = ekin1 + pvMass;
|
|---|
| 2883 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 2884 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 2885 | pp*sint*std::cos(phi),
|
|---|
| 2886 | pp*cost );
|
|---|
| 2887 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 2888 | vecLen++;
|
|---|
| 2889 | }
|
|---|
| 2890 | if( (atomicWeight >= 10.0 ) && (incidentKineticEnergy <= 2.0) )
|
|---|
| 2891 | {
|
|---|
| 2892 | G4int ika, kk = 0;
|
|---|
| 2893 | eka = incidentKineticEnergy;
|
|---|
| 2894 | if( eka > 1.0 )eka *= eka;
|
|---|
| 2895 | eka = Amax( 0.1, eka );
|
|---|
| 2896 | ika = G4int(3.6*std::exp((atomicNumber*atomicNumber
|
|---|
| 2897 | /atomicWeight-35.56)/6.45)/eka);
|
|---|
| 2898 | if( ika > 0 )
|
|---|
| 2899 | {
|
|---|
| 2900 | for( i=(vecLen-1); i>=0; i-- )
|
|---|
| 2901 | {
|
|---|
| 2902 | if( (pv[i].getCode() == protonCode) && pv[i].getFlag() )
|
|---|
| 2903 | {
|
|---|
| 2904 | G4HEVector pTemp = pv[i];
|
|---|
| 2905 | pv[i].setDefinition( "Neutron" );
|
|---|
| 2906 | pv[i].setMomentumAndUpdate(pTemp.getMomentum());
|
|---|
| 2907 | if (verboseLevel > 1) pv[i].Print(i);
|
|---|
| 2908 | if( ++kk > ika ) break;
|
|---|
| 2909 | }
|
|---|
| 2910 | }
|
|---|
| 2911 | }
|
|---|
| 2912 | }
|
|---|
| 2913 | }
|
|---|
| 2914 | }
|
|---|
| 2915 |
|
|---|
| 2916 | // Finished adding proton/neutron black track particles
|
|---|
| 2917 | // now, try to add deuterons, tritons and alphas
|
|---|
| 2918 |
|
|---|
| 2919 | if( excitationEnergyDTA >= 0.001 )
|
|---|
| 2920 | {
|
|---|
| 2921 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyDTA
|
|---|
| 2922 | /(excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 2923 |
|
|---|
| 2924 | // nbl is the number of deutrons, tritons, and alphas produced
|
|---|
| 2925 |
|
|---|
| 2926 | if( nbl > 0 )
|
|---|
| 2927 | {
|
|---|
| 2928 | ekin = excitationEnergyDTA/nbl;
|
|---|
| 2929 | ekin2 = 0.0;
|
|---|
| 2930 | for( i=0; i<nbl; i++ )
|
|---|
| 2931 | {
|
|---|
| 2932 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 2933 | if( ekin2 > excitationEnergyDTA) break;
|
|---|
| 2934 | ran = G4UniformRand();
|
|---|
| 2935 | ekin1 = -ekin*std::log(ran)-cfa*(1.+0.5*normal());
|
|---|
| 2936 | if( ekin1 < 0.0 ) ekin1 = -0.010*std::log(ran);
|
|---|
| 2937 | ekin2 += ekin1;
|
|---|
| 2938 | if( ekin2 > excitationEnergyDTA )
|
|---|
| 2939 | ekin1 = Amax( 1.0e-6, excitationEnergyDTA-(ekin2-ekin1));
|
|---|
| 2940 | cost = G4UniformRand()*2.0 - 1.0;
|
|---|
| 2941 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 2942 | phi = twopi*G4UniformRand();
|
|---|
| 2943 | ran = G4UniformRand();
|
|---|
| 2944 | if( ran <= 0.60 )
|
|---|
| 2945 | pv[vecLen].setDefinition( "Deuteron");
|
|---|
| 2946 | else if (ran <= 0.90)
|
|---|
| 2947 | pv[vecLen].setDefinition( "Triton" );
|
|---|
| 2948 | else
|
|---|
| 2949 | pv[vecLen].setDefinition( "Alpha" );
|
|---|
| 2950 | spall += (int)(pv[vecLen].getMass() * 1.066);
|
|---|
| 2951 | if( spall > atomicWeight ) break;
|
|---|
| 2952 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 2953 | pv[vecLen].setSide( -4 );
|
|---|
| 2954 | pvMass = pv[vecLen].getMass();
|
|---|
| 2955 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 2956 | pvEnergy = pvMass + ekin1;
|
|---|
| 2957 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 2958 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 2959 | pp*sint*std::cos(phi),
|
|---|
| 2960 | pp*cost );
|
|---|
| 2961 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 2962 | vecLen++;
|
|---|
| 2963 | }
|
|---|
| 2964 | }
|
|---|
| 2965 | }
|
|---|
| 2966 | }
|
|---|
| 2967 | if( centerOfMassEnergy <= (4.0+G4UniformRand()) )
|
|---|
| 2968 | {
|
|---|
| 2969 | for( i=0; i<vecLen; i++ )
|
|---|
| 2970 | {
|
|---|
| 2971 | G4double etb = pv[i].getKineticEnergy();
|
|---|
| 2972 | if( etb >= incidentKineticEnergy )
|
|---|
| 2973 | pv[i].setKineticEnergyAndUpdate( incidentKineticEnergy );
|
|---|
| 2974 | }
|
|---|
| 2975 | }
|
|---|
| 2976 |
|
|---|
| 2977 | TuningOfHighEnergyCascading( pv, vecLen,
|
|---|
| 2978 | incidentParticle, targetParticle,
|
|---|
| 2979 | atomicWeight, atomicNumber);
|
|---|
| 2980 |
|
|---|
| 2981 | // Calculate time delay for nuclear reactions
|
|---|
| 2982 |
|
|---|
| 2983 | G4double tof = incidentTOF;
|
|---|
| 2984 | if( (atomicWeight >= 1.5) && (atomicWeight <= 230.0)
|
|---|
| 2985 | && (incidentKineticEnergy <= 0.2) )
|
|---|
| 2986 | tof -= 500.0 * std::exp(-incidentKineticEnergy /0.04) * std::log( G4UniformRand() );
|
|---|
| 2987 | for ( i=0; i < vecLen; i++)
|
|---|
| 2988 | {
|
|---|
| 2989 |
|
|---|
| 2990 | pv[i].setTOF ( tof );
|
|---|
| 2991 | // vec[i].SetTOF ( tof );
|
|---|
| 2992 | }
|
|---|
| 2993 |
|
|---|
| 2994 | for(i=0; i<vecLen; i++)
|
|---|
| 2995 | {
|
|---|
| 2996 | if(pv[i].getName() == "KaonZero" || pv[i].getName() == "AntiKaonZero")
|
|---|
| 2997 | {
|
|---|
| 2998 | pvmx[0] = pv[i];
|
|---|
| 2999 | if(G4UniformRand() < 0.5) pv[i].setDefinition("KaonZeroShort");
|
|---|
| 3000 | else pv[i].setDefinition("KaonZeroLong");
|
|---|
| 3001 | pv[i].setMomentumAndUpdate(pvmx[0].getMomentum());
|
|---|
| 3002 | }
|
|---|
| 3003 | }
|
|---|
| 3004 |
|
|---|
| 3005 | successful = true;
|
|---|
| 3006 | delete [] pvmx;
|
|---|
| 3007 | delete [] tempV;
|
|---|
| 3008 | return;
|
|---|
| 3009 | }
|
|---|
| 3010 |
|
|---|
| 3011 | void
|
|---|
| 3012 | G4HEInelastic::MediumEnergyCascading(G4bool &successful,
|
|---|
| 3013 | G4HEVector pv[],
|
|---|
| 3014 | G4int &vecLen,
|
|---|
| 3015 | G4double &excitationEnergyGNP,
|
|---|
| 3016 | G4double &excitationEnergyDTA,
|
|---|
| 3017 | G4HEVector incidentParticle,
|
|---|
| 3018 | G4HEVector targetParticle,
|
|---|
| 3019 | G4double atomicWeight,
|
|---|
| 3020 | G4double atomicNumber)
|
|---|
| 3021 | {
|
|---|
| 3022 | //
|
|---|
| 3023 | // The multiplicity of particles produced in the first interaction has been
|
|---|
| 3024 | // calculated in one of the FirstIntInNuc.... routines. The nuclear
|
|---|
| 3025 | // cascading particles are parametrized from experimental data.
|
|---|
| 3026 | // A simple single variable description E D3S/DP3= F(Q) with
|
|---|
| 3027 | // Q^2 = (M*X)^2 + PT^2 is used. Final state kinematic is produced
|
|---|
| 3028 | // by an FF-type iterative cascade method.
|
|---|
| 3029 | // Nuclear evaporation particles are added at the end of the routine.
|
|---|
| 3030 |
|
|---|
| 3031 | // All quantities on the G4HEVector Array pv are in GeV- units.
|
|---|
| 3032 |
|
|---|
| 3033 | G4int protonCode = Proton.getCode();
|
|---|
| 3034 | G4double protonMass = Proton.getMass();
|
|---|
| 3035 | G4int neutronCode = Neutron.getCode();
|
|---|
| 3036 | G4double kaonPlusMass = KaonPlus.getMass();
|
|---|
| 3037 | G4int kaonPlusCode = KaonPlus.getCode();
|
|---|
| 3038 | G4int kaonMinusCode = KaonMinus.getCode();
|
|---|
| 3039 | G4int kaonZeroSCode = KaonZeroShort.getCode();
|
|---|
| 3040 | G4int kaonZeroLCode = KaonZeroLong.getCode();
|
|---|
| 3041 | G4int kaonZeroCode = KaonZero.getCode();
|
|---|
| 3042 | G4int antiKaonZeroCode = AntiKaonZero.getCode();
|
|---|
| 3043 | G4int pionPlusCode = PionPlus.getCode();
|
|---|
| 3044 | G4int pionZeroCode = PionZero.getCode();
|
|---|
| 3045 | G4int pionMinusCode = PionMinus.getCode();
|
|---|
| 3046 | G4String mesonType = PionPlus.getType();
|
|---|
| 3047 | G4String baryonType = Proton.getType();
|
|---|
| 3048 | G4String antiBaryonType= AntiProton.getType();
|
|---|
| 3049 |
|
|---|
| 3050 | G4double targetMass = targetParticle.getMass();
|
|---|
| 3051 |
|
|---|
| 3052 | G4int incidentCode = incidentParticle.getCode();
|
|---|
| 3053 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 3054 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 3055 | G4double incidentEnergy = incidentParticle.getEnergy();
|
|---|
| 3056 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 3057 | G4String incidentType = incidentParticle.getType();
|
|---|
| 3058 | // G4double incidentTOF = incidentParticle.getTOF();
|
|---|
| 3059 | G4double incidentTOF = 0.;
|
|---|
| 3060 |
|
|---|
| 3061 | // some local variables
|
|---|
| 3062 |
|
|---|
| 3063 | G4int i, j, l;
|
|---|
| 3064 |
|
|---|
| 3065 | if(verboseLevel > 1)
|
|---|
| 3066 | G4cout << " G4HEInelastic::MediumEnergyCascading " << G4endl;
|
|---|
| 3067 |
|
|---|
| 3068 | // define annihilation channels.
|
|---|
| 3069 |
|
|---|
| 3070 | G4bool annihilation = false;
|
|---|
| 3071 | if (incidentCode < 0 && incidentType == antiBaryonType &&
|
|---|
| 3072 | pv[0].getType() != antiBaryonType &&
|
|---|
| 3073 | pv[1].getType() != antiBaryonType )
|
|---|
| 3074 | {
|
|---|
| 3075 | annihilation = true;
|
|---|
| 3076 | }
|
|---|
| 3077 |
|
|---|
| 3078 | successful = false;
|
|---|
| 3079 |
|
|---|
| 3080 | G4double twsup[] = { 1., 1., 0.7, 0.5, 0.3, 0.2, 0.1, 0.0 };
|
|---|
| 3081 |
|
|---|
| 3082 | if(annihilation) goto start;
|
|---|
| 3083 | if(vecLen >= 8) goto start;
|
|---|
| 3084 | if(incidentKineticEnergy < 1.) return;
|
|---|
| 3085 | if( ( incidentCode == kaonPlusCode || incidentCode == kaonMinusCode
|
|---|
| 3086 | || incidentCode == kaonZeroCode || incidentCode == antiKaonZeroCode
|
|---|
| 3087 | || incidentCode == kaonZeroSCode || incidentCode == kaonZeroLCode )
|
|---|
| 3088 | && ( G4UniformRand() < 0.5)) goto start;
|
|---|
| 3089 | if(G4UniformRand() > twsup[vecLen-1]) goto start;
|
|---|
| 3090 | return;
|
|---|
| 3091 |
|
|---|
| 3092 | start:
|
|---|
| 3093 |
|
|---|
| 3094 | if (annihilation)
|
|---|
| 3095 | { // do some corrections of incident particle kinematic
|
|---|
| 3096 | G4double ekcor = Amax( 1., 1./incidentKineticEnergy);
|
|---|
| 3097 | incidentKineticEnergy = 2*targetMass + incidentKineticEnergy*(1.+ekcor/atomicWeight);
|
|---|
| 3098 | G4double excitation = NuclearExcitation(incidentKineticEnergy,
|
|---|
| 3099 | atomicWeight,
|
|---|
| 3100 | atomicNumber,
|
|---|
| 3101 | excitationEnergyGNP,
|
|---|
| 3102 | excitationEnergyDTA);
|
|---|
| 3103 | incidentKineticEnergy -= excitation;
|
|---|
| 3104 | if (incidentKineticEnergy < excitationEnergyDTA) incidentKineticEnergy = 0.;
|
|---|
| 3105 | incidentEnergy = incidentKineticEnergy + incidentMass;
|
|---|
| 3106 | incidentTotalMomentum =
|
|---|
| 3107 | std::sqrt( Amax(0., incidentEnergy*incidentEnergy - incidentMass*incidentMass));
|
|---|
| 3108 | }
|
|---|
| 3109 |
|
|---|
| 3110 | G4HEVector pTemp;
|
|---|
| 3111 | for(i = 2; i<vecLen; i++)
|
|---|
| 3112 | {
|
|---|
| 3113 | j = Imin(vecLen-1, (G4int)(2. + G4UniformRand()*(vecLen-2)));
|
|---|
| 3114 | pTemp = pv[j];
|
|---|
| 3115 | pv[j] = pv[i];
|
|---|
| 3116 | pv[i] = pTemp;
|
|---|
| 3117 | }
|
|---|
| 3118 |
|
|---|
| 3119 | // randomize the first two leading particles
|
|---|
| 3120 | // for kaon induced reactions only
|
|---|
| 3121 | // (need from experimental data)
|
|---|
| 3122 |
|
|---|
| 3123 | if( (incidentCode==kaonPlusCode || incidentCode==kaonMinusCode ||
|
|---|
| 3124 | incidentCode==kaonZeroCode || incidentCode==antiKaonZeroCode ||
|
|---|
| 3125 | incidentCode==kaonZeroSCode || incidentCode==kaonZeroLCode)
|
|---|
| 3126 | && (G4UniformRand()>0.7) )
|
|---|
| 3127 | {
|
|---|
| 3128 | pTemp = pv[1];
|
|---|
| 3129 | pv[1] = pv[0];
|
|---|
| 3130 | pv[0] = pTemp;
|
|---|
| 3131 | }
|
|---|
| 3132 |
|
|---|
| 3133 | // mark leading particles for incident strange particles
|
|---|
| 3134 | // and antibaryons, for all other we assume that the first
|
|---|
| 3135 | // and second particle are the leading particles.
|
|---|
| 3136 | // We need this later for kinematic aspects of strangeness
|
|---|
| 3137 | // conservation.
|
|---|
| 3138 |
|
|---|
| 3139 | G4int lead = 0;
|
|---|
| 3140 | G4HEVector leadParticle;
|
|---|
| 3141 | if( (incidentMass >= kaonPlusMass-0.05) && (incidentCode != protonCode)
|
|---|
| 3142 | && (incidentCode != neutronCode) )
|
|---|
| 3143 | {
|
|---|
| 3144 | G4double pMass = pv[0].getMass();
|
|---|
| 3145 | G4int pCode = pv[0].getCode();
|
|---|
| 3146 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 3147 | && (pCode != neutronCode) )
|
|---|
| 3148 | {
|
|---|
| 3149 | lead = pCode;
|
|---|
| 3150 | leadParticle = pv[0];
|
|---|
| 3151 | }
|
|---|
| 3152 | else
|
|---|
| 3153 | {
|
|---|
| 3154 | pMass = pv[1].getMass();
|
|---|
| 3155 | pCode = pv[1].getCode();
|
|---|
| 3156 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 3157 | && (pCode != neutronCode) )
|
|---|
| 3158 | {
|
|---|
| 3159 | lead = pCode;
|
|---|
| 3160 | leadParticle = pv[1];
|
|---|
| 3161 | }
|
|---|
| 3162 | }
|
|---|
| 3163 | }
|
|---|
| 3164 |
|
|---|
| 3165 | // Distribute particles in forward and backward hemispheres in center of
|
|---|
| 3166 | // mass system. Incident particle goes in forward hemisphere.
|
|---|
| 3167 |
|
|---|
| 3168 | G4HEVector pvI = incidentParticle; // for the incident particle
|
|---|
| 3169 | pvI.setSide( 1 );
|
|---|
| 3170 |
|
|---|
| 3171 | G4HEVector pvT = targetParticle; // for the target particle
|
|---|
| 3172 | pvT.setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 3173 | pvT.setSide( -1 );
|
|---|
| 3174 | pvT.setTOF( -1.);
|
|---|
| 3175 |
|
|---|
| 3176 |
|
|---|
| 3177 | G4double centerOfMassEnergy = std::sqrt( sqr(incidentMass)+sqr(targetMass)
|
|---|
| 3178 | +2.0*targetMass*incidentEnergy );
|
|---|
| 3179 | // G4double availableEnergy = centerOfMassEnergy - ( targetMass + incidentMass );
|
|---|
| 3180 |
|
|---|
| 3181 | G4double tavai1 = centerOfMassEnergy/2.0 - incidentMass;
|
|---|
| 3182 | G4double tavai2 = centerOfMassEnergy/2.0 - targetMass;
|
|---|
| 3183 |
|
|---|
| 3184 | G4int ntb = 1;
|
|---|
| 3185 | for( i=0; i < vecLen; i++ )
|
|---|
| 3186 | {
|
|---|
| 3187 | if (i == 0) pv[i].setSide( 1 );
|
|---|
| 3188 | else if (i == 1) pv[i].setSide( -1 );
|
|---|
| 3189 | else
|
|---|
| 3190 | { if( G4UniformRand() < 0.5 )
|
|---|
| 3191 | {
|
|---|
| 3192 | pv[i].setSide( -1 );
|
|---|
| 3193 | ntb++;
|
|---|
| 3194 | }
|
|---|
| 3195 | else
|
|---|
| 3196 | pv[i].setSide( 1 );
|
|---|
| 3197 | }
|
|---|
| 3198 | pv[i].setTOF( incidentTOF);
|
|---|
| 3199 | }
|
|---|
| 3200 | G4double tb = 2. * ntb;
|
|---|
| 3201 | if (centerOfMassEnergy < (2. + G4UniformRand()))
|
|---|
| 3202 | tb = (2. * ntb + vecLen)/2.;
|
|---|
| 3203 |
|
|---|
| 3204 | if (verboseLevel > 1)
|
|---|
| 3205 | { G4cout << " pv Vector after Randomization " << vecLen << G4endl;
|
|---|
| 3206 | pvI.Print(-1);
|
|---|
| 3207 | pvT.Print(-1);
|
|---|
| 3208 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 3209 | }
|
|---|
| 3210 |
|
|---|
| 3211 | // Add particles from intranuclear cascade
|
|---|
| 3212 | // nuclearCascadeCount = number of new secondaries
|
|---|
| 3213 | // produced by nuclear cascading.
|
|---|
| 3214 | // extraCount = number of nucleons within these new secondaries
|
|---|
| 3215 |
|
|---|
| 3216 | G4double s, xtarg, ran;
|
|---|
| 3217 | s = centerOfMassEnergy*centerOfMassEnergy;
|
|---|
| 3218 | xtarg = Amax( 0.01, Amin( 0.75, 0.312 + 0.200 * std::log(std::log(s))
|
|---|
| 3219 | + std::pow(s,1.5)/6000.0 )
|
|---|
| 3220 | *(std::pow(atomicWeight, 0.33) - 1.0) * tb);
|
|---|
| 3221 |
|
|---|
| 3222 | G4int ntarg = Poisson( xtarg );
|
|---|
| 3223 | G4int targ = 0;
|
|---|
| 3224 |
|
|---|
| 3225 | if( ntarg > 0 )
|
|---|
| 3226 | {
|
|---|
| 3227 | G4double nucsup[] = { 1.00, 0.7, 0.5, 0.4, 0.35, 0.3 };
|
|---|
| 3228 | G4double psup[] = { 3., 6., 20., 50., 100., 1000. };
|
|---|
| 3229 | G4int momentumBin = 0;
|
|---|
| 3230 | while( (momentumBin < 6) && (incidentTotalMomentum > psup[momentumBin]) )
|
|---|
| 3231 | momentumBin++;
|
|---|
| 3232 | momentumBin = Imin( 5, momentumBin );
|
|---|
| 3233 |
|
|---|
| 3234 | // NOTE: in GENXPT, these new particles were given negative codes
|
|---|
| 3235 | // here I use flag = true instead
|
|---|
| 3236 |
|
|---|
| 3237 | for( i=0; i<ntarg; i++ )
|
|---|
| 3238 | {
|
|---|
| 3239 | if( G4UniformRand() < nucsup[momentumBin] )
|
|---|
| 3240 | {
|
|---|
| 3241 | if( G4UniformRand() > 1.0-atomicNumber/atomicWeight )
|
|---|
| 3242 | pv[vecLen].setDefinition( "Proton" );
|
|---|
| 3243 | else
|
|---|
| 3244 | pv[vecLen].setDefinition( "Neutron" );
|
|---|
| 3245 | targ++;
|
|---|
| 3246 | }
|
|---|
| 3247 | else
|
|---|
| 3248 | {
|
|---|
| 3249 | ran = G4UniformRand();
|
|---|
| 3250 | if( ran < 0.33333 )
|
|---|
| 3251 | pv[vecLen].setDefinition( "PionPlus");
|
|---|
| 3252 | else if( ran < 0.66667 )
|
|---|
| 3253 | pv[vecLen].setDefinition( "PionZero");
|
|---|
| 3254 | else
|
|---|
| 3255 | pv[vecLen].setDefinition( "PionMinus" );
|
|---|
| 3256 | }
|
|---|
| 3257 | pv[vecLen].setSide( -2 ); // backward cascade particles
|
|---|
| 3258 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 3259 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 3260 | vecLen++;
|
|---|
| 3261 | }
|
|---|
| 3262 | }
|
|---|
| 3263 |
|
|---|
| 3264 | // assume conservation of kinetic energy
|
|---|
| 3265 | // in forward & backward hemispheres
|
|---|
| 3266 |
|
|---|
| 3267 | G4int is, iskip;
|
|---|
| 3268 | tavai1 = centerOfMassEnergy/2.;
|
|---|
| 3269 | G4int iavai1 = 0;
|
|---|
| 3270 |
|
|---|
| 3271 | for (i = 0; i < vecLen; i++)
|
|---|
| 3272 | {
|
|---|
| 3273 | if (pv[i].getSide() > 0)
|
|---|
| 3274 | {
|
|---|
| 3275 | tavai1 -= pv[i].getMass();
|
|---|
| 3276 | iavai1++;
|
|---|
| 3277 | }
|
|---|
| 3278 | }
|
|---|
| 3279 | if ( iavai1 == 0) return;
|
|---|
| 3280 |
|
|---|
| 3281 | while( tavai1 <= 0.0 )
|
|---|
| 3282 | { // must eliminate a particle from the forward side
|
|---|
| 3283 | iskip = G4int(G4UniformRand()*iavai1) + 1;
|
|---|
| 3284 | is = 0;
|
|---|
| 3285 | for( i=vecLen-1; i>=0; i-- )
|
|---|
| 3286 | {
|
|---|
| 3287 | if( pv[i].getSide() > 0 )
|
|---|
| 3288 | {
|
|---|
| 3289 | if (++is == iskip)
|
|---|
| 3290 | {
|
|---|
| 3291 | tavai1 += pv[i].getMass();
|
|---|
| 3292 | iavai1--;
|
|---|
| 3293 | if ( i != vecLen-1)
|
|---|
| 3294 | {
|
|---|
| 3295 | for( j=i; j<vecLen; j++ )
|
|---|
| 3296 | {
|
|---|
| 3297 | pv[j] = pv[j+1];
|
|---|
| 3298 | }
|
|---|
| 3299 | }
|
|---|
| 3300 | if( --vecLen == 0 ) return; // all the secondaries except of the
|
|---|
| 3301 | break; // --+
|
|---|
| 3302 | } // |
|
|---|
| 3303 | } // v
|
|---|
| 3304 | } // break goes down to here
|
|---|
| 3305 | } // to the end of the for- loop.
|
|---|
| 3306 |
|
|---|
| 3307 |
|
|---|
| 3308 | tavai2 = (targ+1)*centerOfMassEnergy/2.;
|
|---|
| 3309 | G4int iavai2 = 0;
|
|---|
| 3310 |
|
|---|
| 3311 | for (i = 0; i < vecLen; i++)
|
|---|
| 3312 | {
|
|---|
| 3313 | if (pv[i].getSide() < 0)
|
|---|
| 3314 | {
|
|---|
| 3315 | tavai2 -= pv[i].getMass();
|
|---|
| 3316 | iavai2++;
|
|---|
| 3317 | }
|
|---|
| 3318 | }
|
|---|
| 3319 | if (iavai2 == 0) return;
|
|---|
| 3320 |
|
|---|
| 3321 | while( tavai2 <= 0.0 )
|
|---|
| 3322 | { // must eliminate a particle from the backward side
|
|---|
| 3323 | iskip = G4int(G4UniformRand()*iavai2) + 1;
|
|---|
| 3324 | is = 0;
|
|---|
| 3325 | for( i = vecLen-1; i >= 0; i-- )
|
|---|
| 3326 | {
|
|---|
| 3327 | if( pv[i].getSide() < 0 )
|
|---|
| 3328 | {
|
|---|
| 3329 | if( ++is == iskip )
|
|---|
| 3330 | {
|
|---|
| 3331 | tavai2 += pv[i].getMass();
|
|---|
| 3332 | iavai2--;
|
|---|
| 3333 | if (pv[i].getSide() == -2) ntarg--;
|
|---|
| 3334 | if (i != vecLen-1)
|
|---|
| 3335 | {
|
|---|
| 3336 | for( j=i; j<vecLen; j++)
|
|---|
| 3337 | {
|
|---|
| 3338 | pv[j] = pv[j+1];
|
|---|
| 3339 | }
|
|---|
| 3340 | }
|
|---|
| 3341 | if (--vecLen == 0) return;
|
|---|
| 3342 | break;
|
|---|
| 3343 | }
|
|---|
| 3344 | }
|
|---|
| 3345 | }
|
|---|
| 3346 | }
|
|---|
| 3347 |
|
|---|
| 3348 | if (verboseLevel > 1) {
|
|---|
| 3349 | G4cout << " pv Vector after Energy checks " << vecLen << " "
|
|---|
| 3350 | << tavai1 << " " << iavai1 << " " << tavai2 << " "
|
|---|
| 3351 | << iavai2 << " " << ntarg << G4endl;
|
|---|
| 3352 | pvI.Print(-1);
|
|---|
| 3353 | pvT.Print(-1);
|
|---|
| 3354 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 3355 | }
|
|---|
| 3356 |
|
|---|
| 3357 | // Define some vectors for Lorentz transformations
|
|---|
| 3358 |
|
|---|
| 3359 | G4HEVector* pvmx = new G4HEVector [10];
|
|---|
| 3360 |
|
|---|
| 3361 | pvmx[0].setMass( incidentMass );
|
|---|
| 3362 | pvmx[0].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 3363 | pvmx[1].setMass( protonMass);
|
|---|
| 3364 | pvmx[1].setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 3365 | pvmx[3].setMass( protonMass*(1+targ));
|
|---|
| 3366 | pvmx[3].setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 3367 | pvmx[4].setZero();
|
|---|
| 3368 | pvmx[5].setZero();
|
|---|
| 3369 | pvmx[7].setZero();
|
|---|
| 3370 | pvmx[8].setZero();
|
|---|
| 3371 | pvmx[8].setMomentum( 1.0, 0.0 );
|
|---|
| 3372 | pvmx[2].Add( pvmx[0], pvmx[1] );
|
|---|
| 3373 | pvmx[3].Add( pvmx[3], pvmx[0] );
|
|---|
| 3374 | pvmx[0].Lor( pvmx[0], pvmx[2] );
|
|---|
| 3375 | pvmx[1].Lor( pvmx[1], pvmx[2] );
|
|---|
| 3376 |
|
|---|
| 3377 | if (verboseLevel > 1) {
|
|---|
| 3378 | G4cout << " General Vectors after Definition " << G4endl;
|
|---|
| 3379 | for (i=0; i<10; i++) pvmx[i].Print(i);
|
|---|
| 3380 | }
|
|---|
| 3381 |
|
|---|
| 3382 | // Main loop for 4-momentum generation - see Pitha-report (Aachen)
|
|---|
| 3383 | // for a detailed description of the method.
|
|---|
| 3384 | // Process the secondary particles in reverse order
|
|---|
| 3385 |
|
|---|
| 3386 | G4double dndl[20];
|
|---|
| 3387 | G4double binl[20];
|
|---|
| 3388 | G4double pvMass, pvEnergy;
|
|---|
| 3389 | G4int pvCode;
|
|---|
| 3390 | G4double aspar, pt, phi, et, xval;
|
|---|
| 3391 | G4double ekin = 0.;
|
|---|
| 3392 | G4double ekin1 = 0.;
|
|---|
| 3393 | G4double ekin2 = 0.;
|
|---|
| 3394 | phi = G4UniformRand()*twopi;
|
|---|
| 3395 | G4int npg = 0;
|
|---|
| 3396 | G4int targ1 = 0; // No fragmentation model for nucleons
|
|---|
| 3397 | for( i=vecLen-1; i>=0; i-- ) // from the intranuclear cascade. Mark
|
|---|
| 3398 | { // them with -3 and leave the loop.
|
|---|
| 3399 | if( (pv[i].getSide() == -2) || (i == 1) )
|
|---|
| 3400 | {
|
|---|
| 3401 | if ( pv[i].getType() == baryonType ||
|
|---|
| 3402 | pv[i].getType() == antiBaryonType)
|
|---|
| 3403 | {
|
|---|
| 3404 | if( ++npg < 19 )
|
|---|
| 3405 | {
|
|---|
| 3406 | pv[i].setSide( -3 );
|
|---|
| 3407 | targ1++;
|
|---|
| 3408 | continue; // leave the for loop !!
|
|---|
| 3409 | }
|
|---|
| 3410 | }
|
|---|
| 3411 | }
|
|---|
| 3412 |
|
|---|
| 3413 | // Set pt and phi values - they are changed somewhat in the
|
|---|
| 3414 | // iteration loop.
|
|---|
| 3415 | // Set mass parameter for lambda fragmentation model
|
|---|
| 3416 |
|
|---|
| 3417 | G4double maspar[] = { 0.75, 0.70, 0.65, 0.60, 0.50, 0.40, 0.75, 0.20};
|
|---|
| 3418 | G4double bp[] = { 3.50, 3.50, 3.50, 6.00, 5.00, 4.00, 3.50, 3.50};
|
|---|
| 3419 | G4double ptex[] = { 1.70, 1.70, 1.50, 1.70, 1.40, 1.20, 1.70, 1.20};
|
|---|
| 3420 | // Set parameters for lambda simulation:
|
|---|
| 3421 | // pt is the average transverse momentum
|
|---|
| 3422 | // aspar the is average transverse mass
|
|---|
| 3423 |
|
|---|
| 3424 | pvMass = pv[i].getMass();
|
|---|
| 3425 | j = 2;
|
|---|
| 3426 | if ( pv[i].getType() == mesonType ) j = 1;
|
|---|
| 3427 | if ( pv[i].getMass() < 0.4 ) j = 0;
|
|---|
| 3428 | if ( i <= 1 ) j += 3;
|
|---|
| 3429 | if (pv[i].getSide() <= -2) j = 6;
|
|---|
| 3430 | if (j == 6 && (pv[i].getType() == baryonType || pv[i].getType()==antiBaryonType) ) j = 7;
|
|---|
| 3431 | pt = Amax(0.001, std::sqrt(std::pow(-std::log(1.-G4UniformRand())/bp[j],ptex[j])));
|
|---|
| 3432 | aspar = maspar[j];
|
|---|
| 3433 | phi = G4UniformRand()*twopi;
|
|---|
| 3434 | pv[i].setMomentum( pt*std::cos(phi), pt*std::sin(phi) ); // set x- and y-momentum
|
|---|
| 3435 |
|
|---|
| 3436 | for( j=0; j<20; j++ ) binl[j] = j/(19.*pt); // set the lambda - bins.
|
|---|
| 3437 |
|
|---|
| 3438 | if( pv[i].getSide() > 0 )
|
|---|
| 3439 | et = pvmx[0].getEnergy();
|
|---|
| 3440 | else
|
|---|
| 3441 | et = pvmx[1].getEnergy();
|
|---|
| 3442 |
|
|---|
| 3443 | dndl[0] = 0.0;
|
|---|
| 3444 |
|
|---|
| 3445 | // Start of outer iteration loop
|
|---|
| 3446 |
|
|---|
| 3447 | G4int outerCounter = 0, innerCounter = 0; // three times.
|
|---|
| 3448 | G4bool eliminateThisParticle = true;
|
|---|
| 3449 | G4bool resetEnergies = true;
|
|---|
| 3450 | while( ++outerCounter < 3 )
|
|---|
| 3451 | {
|
|---|
| 3452 | for( l=1; l<20; l++ )
|
|---|
| 3453 | {
|
|---|
| 3454 | xval = (binl[l]+binl[l-1])/2.; // x = lambda /GeV
|
|---|
| 3455 | if( xval > 1./pt )
|
|---|
| 3456 | dndl[l] = dndl[l-1];
|
|---|
| 3457 | else
|
|---|
| 3458 | dndl[l] = dndl[l-1] +
|
|---|
| 3459 | aspar/std::sqrt( std::pow((1.+aspar*xval*aspar*xval),3) ) *
|
|---|
| 3460 | (binl[l]-binl[l-1]) * et /
|
|---|
| 3461 | std::sqrt( pt*xval*et*pt*xval*et + pt*pt + pvMass*pvMass );
|
|---|
| 3462 | }
|
|---|
| 3463 |
|
|---|
| 3464 | // Start of inner iteration loop
|
|---|
| 3465 |
|
|---|
| 3466 | innerCounter = 0; // try this not more than 7 times.
|
|---|
| 3467 | while( ++innerCounter < 7 )
|
|---|
| 3468 | {
|
|---|
| 3469 | l = 1;
|
|---|
| 3470 | ran = G4UniformRand()*dndl[19];
|
|---|
| 3471 | while( ( ran >= dndl[l] ) && ( l < 20 ) )l++;
|
|---|
| 3472 | l = Imin( 19, l );
|
|---|
| 3473 | xval = Amin( 1.0, pt*(binl[l-1] + G4UniformRand()*(binl[l]-binl[l-1]) ) );
|
|---|
| 3474 | if( pv[i].getSide() < 0 ) xval *= -1.;
|
|---|
| 3475 | pv[i].setMomentumAndUpdate( xval*et ); // set the z-momentum
|
|---|
| 3476 | pvEnergy = pv[i].getEnergy();
|
|---|
| 3477 | if( pv[i].getSide() > 0 ) // forward side
|
|---|
| 3478 | {
|
|---|
| 3479 | if ( i < 2 )
|
|---|
| 3480 | {
|
|---|
| 3481 | ekin = tavai1 - ekin1;
|
|---|
| 3482 | if (ekin < 0.) ekin = 0.04*std::fabs(normal());
|
|---|
| 3483 | G4double pp1 = pv[i].Length();
|
|---|
| 3484 | if (pp1 >= 1.e-6)
|
|---|
| 3485 | {
|
|---|
| 3486 | G4double pp = std::sqrt(ekin*(ekin+2*pvMass));
|
|---|
| 3487 | pp = Amax(0.,pp*pp-pt*pt);
|
|---|
| 3488 | pp = std::sqrt(pp)*pv[i].getSide()/std::fabs(G4double(pv[i].getSide()));
|
|---|
| 3489 | pv[i].setMomentumAndUpdate( pp );
|
|---|
| 3490 | }
|
|---|
| 3491 | else
|
|---|
| 3492 | {
|
|---|
| 3493 | pv[i].setMomentum(0.,0.,0.);
|
|---|
| 3494 | pv[i].setKineticEnergyAndUpdate( ekin);
|
|---|
| 3495 | }
|
|---|
| 3496 | pvmx[4].Add( pvmx[4], pv[i]);
|
|---|
| 3497 | outerCounter = 2;
|
|---|
| 3498 | resetEnergies = false;
|
|---|
| 3499 | eliminateThisParticle = false;
|
|---|
| 3500 | break;
|
|---|
| 3501 | }
|
|---|
| 3502 | else if( (ekin1+pvEnergy-pvMass) < 0.95*tavai1 )
|
|---|
| 3503 | {
|
|---|
| 3504 | pvmx[4].Add( pvmx[4], pv[i] );
|
|---|
| 3505 | ekin1 += pvEnergy - pvMass;
|
|---|
| 3506 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 3507 | pvmx[6].setMomentum( 0.0 );
|
|---|
| 3508 | outerCounter = 2; // leave outer loop
|
|---|
| 3509 | eliminateThisParticle = false; // don't eliminate this particle
|
|---|
| 3510 | resetEnergies = false;
|
|---|
| 3511 | break; // next particle
|
|---|
| 3512 | }
|
|---|
| 3513 | if( innerCounter > 5 ) break; // leave inner loop
|
|---|
| 3514 |
|
|---|
| 3515 | if( tavai2 >= pvMass )
|
|---|
| 3516 | { // switch sides
|
|---|
| 3517 | pv[i].setSide( -1 );
|
|---|
| 3518 | tavai1 += pvMass;
|
|---|
| 3519 | tavai2 -= pvMass;
|
|---|
| 3520 | iavai2++;
|
|---|
| 3521 | }
|
|---|
| 3522 | }
|
|---|
| 3523 | else
|
|---|
| 3524 | { // backward side
|
|---|
| 3525 | xval = Amin(0.999,0.95+0.05*targ/20.0);
|
|---|
| 3526 | if( (ekin2+pvEnergy-pvMass) < xval*tavai2 )
|
|---|
| 3527 | {
|
|---|
| 3528 | pvmx[5].Add( pvmx[5], pv[i] );
|
|---|
| 3529 | ekin2 += pvEnergy - pvMass;
|
|---|
| 3530 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 3531 | pvmx[6].setMomentum( 0.0 ); // set z-momentum
|
|---|
| 3532 | outerCounter = 2; // leave outer iteration
|
|---|
| 3533 | eliminateThisParticle = false; // don't eliminate this particle
|
|---|
| 3534 | resetEnergies = false;
|
|---|
| 3535 | break; // leave inner iteration
|
|---|
| 3536 | }
|
|---|
| 3537 | if( innerCounter > 5 )break; // leave inner iteration
|
|---|
| 3538 |
|
|---|
| 3539 | if( tavai1 >= pvMass )
|
|---|
| 3540 | { // switch sides
|
|---|
| 3541 | pv[i].setSide( 1 );
|
|---|
| 3542 | tavai1 -= pvMass;
|
|---|
| 3543 | tavai2 += pvMass;
|
|---|
| 3544 | iavai2--;
|
|---|
| 3545 | }
|
|---|
| 3546 | }
|
|---|
| 3547 | pv[i].setMomentum( pv[i].getMomentum().x() * 0.9,
|
|---|
| 3548 | pv[i].getMomentum().y() * 0.9);
|
|---|
| 3549 | pt *= 0.9;
|
|---|
| 3550 | dndl[19] *= 0.9;
|
|---|
| 3551 | } // closes inner loop
|
|---|
| 3552 |
|
|---|
| 3553 | if (resetEnergies)
|
|---|
| 3554 | {
|
|---|
| 3555 | ekin1 = 0.0;
|
|---|
| 3556 | ekin2 = 0.0;
|
|---|
| 3557 | pvmx[4].setZero();
|
|---|
| 3558 | pvmx[5].setZero();
|
|---|
| 3559 | if (verboseLevel > 1)
|
|---|
| 3560 | G4cout << " Reset energies for index " << i << G4endl;
|
|---|
| 3561 | for( l=i+1; l < vecLen; l++ )
|
|---|
| 3562 | {
|
|---|
| 3563 | if( (pv[l].getMass() < protonMass) || (pv[l].getSide() > 0) )
|
|---|
| 3564 | {
|
|---|
| 3565 | pvEnergy = Amax( pv[l].getMass(), 0.95*pv[l].getEnergy()
|
|---|
| 3566 | + 0.05*pv[l].getMass() );
|
|---|
| 3567 | pv[l].setEnergyAndUpdate( pvEnergy );
|
|---|
| 3568 | if( pv[l].getSide() > 0)
|
|---|
| 3569 | {
|
|---|
| 3570 | ekin1 += pv[l].getKineticEnergy();
|
|---|
| 3571 | pvmx[4].Add( pvmx[4], pv[l] );
|
|---|
| 3572 | }
|
|---|
| 3573 | else
|
|---|
| 3574 | {
|
|---|
| 3575 | ekin2 += pv[l].getKineticEnergy();
|
|---|
| 3576 | pvmx[5].Add( pvmx[5], pv[l] );
|
|---|
| 3577 | }
|
|---|
| 3578 | }
|
|---|
| 3579 | }
|
|---|
| 3580 | }
|
|---|
| 3581 | } // closes outer iteration
|
|---|
| 3582 |
|
|---|
| 3583 | if( eliminateThisParticle ) // not enough energy,
|
|---|
| 3584 | { // eliminate this particle
|
|---|
| 3585 | if (verboseLevel > 1)
|
|---|
| 3586 | {
|
|---|
| 3587 | G4cout << " Eliminate particle with index " << i << G4endl;
|
|---|
| 3588 | pv[i].Print(i);
|
|---|
| 3589 | }
|
|---|
| 3590 | for( j=i; j < vecLen; j++ )
|
|---|
| 3591 | { // shift down
|
|---|
| 3592 | pv[j] = pv[j+1];
|
|---|
| 3593 | }
|
|---|
| 3594 | vecLen--;
|
|---|
| 3595 | if(vecLen < 2) return;
|
|---|
| 3596 | i++;
|
|---|
| 3597 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 3598 | pvmx[6].setMomentum( 0.0 ); // set z-momentum
|
|---|
| 3599 | }
|
|---|
| 3600 | } // closes main for loop
|
|---|
| 3601 | if (verboseLevel > 1)
|
|---|
| 3602 | { G4cout << " pv Vector after lambda fragmentation " << vecLen << G4endl;
|
|---|
| 3603 | pvI.Print(-1);
|
|---|
| 3604 | pvT.Print(-1);
|
|---|
| 3605 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 3606 | for (i=0; i < 10; i++) pvmx[i].Print(i);
|
|---|
| 3607 | }
|
|---|
| 3608 |
|
|---|
| 3609 | // Backward nucleons produced with a cluster model
|
|---|
| 3610 |
|
|---|
| 3611 | pvmx[6].Lor( pvmx[3], pvmx[2] );
|
|---|
| 3612 | pvmx[6].Sub( pvmx[6], pvmx[4] );
|
|---|
| 3613 | pvmx[6].Sub( pvmx[6], pvmx[5] );
|
|---|
| 3614 | if (verboseLevel > 1) pvmx[6].Print(6);
|
|---|
| 3615 |
|
|---|
| 3616 | npg = 0;
|
|---|
| 3617 | G4double rmb0 = 0.;
|
|---|
| 3618 | G4double rmb;
|
|---|
| 3619 | G4double wgt;
|
|---|
| 3620 | G4bool constantCrossSection = true;
|
|---|
| 3621 | for (i = 0; i < vecLen; i++)
|
|---|
| 3622 | {
|
|---|
| 3623 | if(pv[i].getSide() == -3)
|
|---|
| 3624 | {
|
|---|
| 3625 | npg++;
|
|---|
| 3626 | rmb0 += pv[i].getMass();
|
|---|
| 3627 | }
|
|---|
| 3628 | }
|
|---|
| 3629 | if( targ1 == 1 || npg < 2)
|
|---|
| 3630 | { // target particle is the only backward nucleon
|
|---|
| 3631 | ekin = Amin( tavai2-ekin2, centerOfMassEnergy/2.0-protonMass );
|
|---|
| 3632 | if( ekin < 0.04 ) ekin = 0.04 * std::fabs( normal() );
|
|---|
| 3633 | G4double pp = std::sqrt(ekin*(ekin+2*pv[1].getMass()));
|
|---|
| 3634 | G4double pp1 = pvmx[6].Length();
|
|---|
| 3635 | if(pp1 < 1.e-6)
|
|---|
| 3636 | {
|
|---|
| 3637 | pv[1].setKineticEnergyAndUpdate(ekin);
|
|---|
| 3638 | }
|
|---|
| 3639 | else
|
|---|
| 3640 | {
|
|---|
| 3641 | pv[1].setMomentum(pvmx[6].getMomentum());
|
|---|
| 3642 | pv[1].SmulAndUpdate(pv[1],pp/pp1);
|
|---|
| 3643 | }
|
|---|
| 3644 | pvmx[5].Add( pvmx[5], pv[1] );
|
|---|
| 3645 | }
|
|---|
| 3646 | else
|
|---|
| 3647 | {
|
|---|
| 3648 | G4double cpar[] = { 0.6, 0.6, 0.35, 0.15, 0.10 };
|
|---|
| 3649 | G4double gpar[] = { 2.6, 2.6, 1.80, 1.30, 1.20 };
|
|---|
| 3650 |
|
|---|
| 3651 | G4int tempCount = Imin( 5, targ1 ) - 1;
|
|---|
| 3652 |
|
|---|
| 3653 | rmb = rmb0 + std::pow(-std::log(1.0-G4UniformRand()), cpar[tempCount])/gpar[tempCount];
|
|---|
| 3654 | pvEnergy = pvmx[6].getEnergy();
|
|---|
| 3655 | if ( rmb > pvEnergy ) rmb = pvEnergy;
|
|---|
| 3656 | pvmx[6].setMass( rmb );
|
|---|
| 3657 | pvmx[6].setEnergyAndUpdate( pvEnergy );
|
|---|
| 3658 | pvmx[6].Smul( pvmx[6], -1. );
|
|---|
| 3659 | if (verboseLevel > 1) {
|
|---|
| 3660 | G4cout << " General Vectors before input to NBodyPhaseSpace "
|
|---|
| 3661 | << targ1 << " " << tempCount << " " << rmb0 << " "
|
|---|
| 3662 | << rmb << " " << pvEnergy << G4endl;
|
|---|
| 3663 | for (i=0; i<10; i++) pvmx[i].Print(i);
|
|---|
| 3664 | }
|
|---|
| 3665 |
|
|---|
| 3666 | // tempV contains the backward nucleons
|
|---|
| 3667 |
|
|---|
| 3668 | G4HEVector* tempV = new G4HEVector[18];
|
|---|
| 3669 | npg = 0;
|
|---|
| 3670 | for( i=0; i < vecLen; i++ )
|
|---|
| 3671 | {
|
|---|
| 3672 | if( pv[i].getSide() == -3 ) tempV[npg++] = pv[i];
|
|---|
| 3673 | }
|
|---|
| 3674 |
|
|---|
| 3675 | wgt = NBodyPhaseSpace( pvmx[6].getMass(), constantCrossSection, tempV, npg );
|
|---|
| 3676 |
|
|---|
| 3677 | npg = 0;
|
|---|
| 3678 | for( i=0; i < vecLen; i++ )
|
|---|
| 3679 | {
|
|---|
| 3680 | if( pv[i].getSide() == -3 )
|
|---|
| 3681 | {
|
|---|
| 3682 | pv[i].setMomentum( tempV[npg++].getMomentum());
|
|---|
| 3683 | pv[i].SmulAndUpdate( pv[i], 1.);
|
|---|
| 3684 | pv[i].Lor( pv[i], pvmx[6] );
|
|---|
| 3685 | pvmx[5].Add( pvmx[5], pv[i] );
|
|---|
| 3686 | }
|
|---|
| 3687 | }
|
|---|
| 3688 | delete [] tempV;
|
|---|
| 3689 | }
|
|---|
| 3690 | if( vecLen <= 2 )
|
|---|
| 3691 | {
|
|---|
| 3692 | successful = false;
|
|---|
| 3693 | return;
|
|---|
| 3694 | }
|
|---|
| 3695 |
|
|---|
| 3696 | // Lorentz transformation in lab system
|
|---|
| 3697 |
|
|---|
| 3698 | targ = 0;
|
|---|
| 3699 | for( i=0; i < vecLen; i++ )
|
|---|
| 3700 | {
|
|---|
| 3701 | if( pv[i].getType() == baryonType )targ++;
|
|---|
| 3702 | if( pv[i].getType() == antiBaryonType )targ++;
|
|---|
| 3703 | pv[i].Lor( pv[i], pvmx[1] );
|
|---|
| 3704 | }
|
|---|
| 3705 | targ = Imax( 1, targ );
|
|---|
| 3706 |
|
|---|
| 3707 | G4bool dum(0);
|
|---|
| 3708 | if( lead )
|
|---|
| 3709 | {
|
|---|
| 3710 | for( i=0; i<vecLen; i++ )
|
|---|
| 3711 | {
|
|---|
| 3712 | if( pv[i].getCode() == lead )
|
|---|
| 3713 | {
|
|---|
| 3714 | dum = false;
|
|---|
| 3715 | break;
|
|---|
| 3716 | }
|
|---|
| 3717 | }
|
|---|
| 3718 | if( dum )
|
|---|
| 3719 | {
|
|---|
| 3720 | i = 0;
|
|---|
| 3721 |
|
|---|
| 3722 | if( ( (leadParticle.getType() == baryonType ||
|
|---|
| 3723 | leadParticle.getType() == antiBaryonType)
|
|---|
| 3724 | && (pv[1].getType() == baryonType ||
|
|---|
| 3725 | pv[1].getType() == antiBaryonType))
|
|---|
| 3726 | || ( (leadParticle.getType() == mesonType)
|
|---|
| 3727 | && (pv[1].getType() == mesonType)))
|
|---|
| 3728 | {
|
|---|
| 3729 | i = 1;
|
|---|
| 3730 | }
|
|---|
| 3731 | ekin = pv[i].getKineticEnergy();
|
|---|
| 3732 | pv[i] = leadParticle;
|
|---|
| 3733 | if( pv[i].getFlag() )
|
|---|
| 3734 | pv[i].setTOF( -1.0 );
|
|---|
| 3735 | else
|
|---|
| 3736 | pv[i].setTOF( 1.0 );
|
|---|
| 3737 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 3738 | }
|
|---|
| 3739 | }
|
|---|
| 3740 |
|
|---|
| 3741 | pvmx[3].setMass( incidentMass);
|
|---|
| 3742 | pvmx[3].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 3743 |
|
|---|
| 3744 | G4double ekin0 = pvmx[3].getKineticEnergy();
|
|---|
| 3745 |
|
|---|
| 3746 | pvmx[4].setMass ( protonMass * targ);
|
|---|
| 3747 | pvmx[4].setEnergy( protonMass * targ);
|
|---|
| 3748 | pvmx[4].setMomentum(0.,0.,0.);
|
|---|
| 3749 | pvmx[4].setKineticEnergy(0.);
|
|---|
| 3750 |
|
|---|
| 3751 | ekin = pvmx[3].getEnergy() + pvmx[4].getEnergy();
|
|---|
| 3752 |
|
|---|
| 3753 | pvmx[5].Add( pvmx[3], pvmx[4] );
|
|---|
| 3754 | pvmx[3].Lor( pvmx[3], pvmx[5] );
|
|---|
| 3755 | pvmx[4].Lor( pvmx[4], pvmx[5] );
|
|---|
| 3756 |
|
|---|
| 3757 | G4double tecm = pvmx[3].getEnergy() + pvmx[4].getEnergy();
|
|---|
| 3758 |
|
|---|
| 3759 | pvmx[7].setZero();
|
|---|
| 3760 |
|
|---|
| 3761 | ekin1 = 0.0;
|
|---|
| 3762 | G4double teta;
|
|---|
| 3763 |
|
|---|
| 3764 | for( i=0; i < vecLen; i++ )
|
|---|
| 3765 | {
|
|---|
| 3766 | pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 3767 | ekin1 += pv[i].getKineticEnergy();
|
|---|
| 3768 | ekin -= pv[i].getMass();
|
|---|
| 3769 | }
|
|---|
| 3770 |
|
|---|
| 3771 | if( vecLen > 1 && vecLen < 19 )
|
|---|
| 3772 | {
|
|---|
| 3773 | constantCrossSection = true;
|
|---|
| 3774 | G4HEVector pw[18];
|
|---|
| 3775 | for(i=0;i<vecLen;i++) pw[i] = pv[i];
|
|---|
| 3776 | wgt = NBodyPhaseSpace( tecm, constantCrossSection, pw, vecLen );
|
|---|
| 3777 | ekin = 0.0;
|
|---|
| 3778 | for( i=0; i < vecLen; i++ )
|
|---|
| 3779 | {
|
|---|
| 3780 | pvmx[6].setMass( pw[i].getMass());
|
|---|
| 3781 | pvmx[6].setMomentum( pw[i].getMomentum() );
|
|---|
| 3782 | pvmx[6].SmulAndUpdate( pvmx[6], 1.);
|
|---|
| 3783 | pvmx[6].Lor( pvmx[6], pvmx[4] );
|
|---|
| 3784 | ekin += pvmx[6].getKineticEnergy();
|
|---|
| 3785 | }
|
|---|
| 3786 | teta = pvmx[7].Ang( pvmx[3] );
|
|---|
| 3787 | if (verboseLevel > 1)
|
|---|
| 3788 | G4cout << " vecLen > 1 && vecLen < 19 " << teta << " " << ekin0
|
|---|
| 3789 | << " " << ekin1 << " " << ekin << G4endl;
|
|---|
| 3790 | }
|
|---|
| 3791 |
|
|---|
| 3792 | if( ekin1 != 0.0 )
|
|---|
| 3793 | {
|
|---|
| 3794 | pvmx[6].setZero();
|
|---|
| 3795 | wgt = ekin/ekin1;
|
|---|
| 3796 | ekin1 = 0.;
|
|---|
| 3797 | for( i=0; i < vecLen; i++ )
|
|---|
| 3798 | {
|
|---|
| 3799 | pvMass = pv[i].getMass();
|
|---|
| 3800 | ekin = pv[i].getKineticEnergy() * wgt;
|
|---|
| 3801 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 3802 | ekin1 += ekin;
|
|---|
| 3803 | pvmx[6].Add( pvmx[6], pv[i] );
|
|---|
| 3804 | }
|
|---|
| 3805 | teta = pvmx[6].Ang( pvmx[3] );
|
|---|
| 3806 | if (verboseLevel > 1)
|
|---|
| 3807 | G4cout << " ekin1 != 0 " << teta << " " << ekin0 << " "
|
|---|
| 3808 | << ekin1 << G4endl;
|
|---|
| 3809 | }
|
|---|
| 3810 |
|
|---|
| 3811 | // Do some smearing in the transverse direction due to Fermi motion.
|
|---|
| 3812 |
|
|---|
| 3813 | G4double ry = G4UniformRand();
|
|---|
| 3814 | G4double rz = G4UniformRand();
|
|---|
| 3815 | G4double rx = twopi*rz;
|
|---|
| 3816 | G4double a1 = std::sqrt(-2.0*std::log(ry));
|
|---|
| 3817 | G4double rantarg1 = a1*std::cos(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 3818 | G4double rantarg2 = a1*std::sin(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 3819 |
|
|---|
| 3820 | for (i = 0; i < vecLen; i++)
|
|---|
| 3821 | pv[i].setMomentum( pv[i].getMomentum().x()+rantarg1,
|
|---|
| 3822 | pv[i].getMomentum().y()+rantarg2 );
|
|---|
| 3823 |
|
|---|
| 3824 | if (verboseLevel > 1) {
|
|---|
| 3825 | pvmx[6].setZero();
|
|---|
| 3826 | for (i = 0; i < vecLen; i++) pvmx[6].Add( pvmx[6], pv[i] );
|
|---|
| 3827 | teta = pvmx[6].Ang( pvmx[3] );
|
|---|
| 3828 | G4cout << " After smearing " << teta << G4endl;
|
|---|
| 3829 | }
|
|---|
| 3830 |
|
|---|
| 3831 | // Rotate in the direction of the primary particle momentum (z-axis).
|
|---|
| 3832 | // This does disturb our inclusive distributions somewhat, but it is
|
|---|
| 3833 | // necessary for momentum conservation.
|
|---|
| 3834 |
|
|---|
| 3835 | // Also subtract binding energies and make some further corrections
|
|---|
| 3836 | // if required.
|
|---|
| 3837 |
|
|---|
| 3838 | G4double dekin = 0.0;
|
|---|
| 3839 | G4int npions = 0;
|
|---|
| 3840 | G4double ek1 = 0.0;
|
|---|
| 3841 | G4double alekw, xxh;
|
|---|
| 3842 | G4double cfa = 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.);
|
|---|
| 3843 | G4double alem[] = {1.40, 2.30, 2.70, 3.00, 3.40, 4.60, 7.00, 10.00};
|
|---|
| 3844 | G4double val0[] = {0.00, 0.40, 0.48, 0.51, 0.54, 0.60, 0.65, 0.70};
|
|---|
| 3845 |
|
|---|
| 3846 |
|
|---|
| 3847 | for (i = 0; i < vecLen; i++)
|
|---|
| 3848 | {
|
|---|
| 3849 | pv[i].Defs1( pv[i], pvI );
|
|---|
| 3850 | if (atomicWeight > 1.5)
|
|---|
| 3851 | {
|
|---|
| 3852 | ekin = Amax( 1.e-6,pv[i].getKineticEnergy() - cfa*( 1. + 0.5*normal()));
|
|---|
| 3853 | alekw = std::log( incidentKineticEnergy );
|
|---|
| 3854 | xxh = 1.;
|
|---|
| 3855 | if(incidentCode == pionPlusCode || incidentCode == pionMinusCode)
|
|---|
| 3856 | {
|
|---|
| 3857 | if(pv[i].getCode() == pionZeroCode)
|
|---|
| 3858 | {
|
|---|
| 3859 | if(G4UniformRand() < std::log(atomicWeight))
|
|---|
| 3860 | {
|
|---|
| 3861 | if (alekw > alem[0])
|
|---|
| 3862 | {
|
|---|
| 3863 | for (j = 1; j < 8; j++)
|
|---|
| 3864 | {
|
|---|
| 3865 | if(alekw < alem[j]) break;
|
|---|
| 3866 | }
|
|---|
| 3867 | xxh = (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alekw
|
|---|
| 3868 | + val0[j-1] - (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alem[j-1];
|
|---|
| 3869 | xxh = 1. - xxh;
|
|---|
| 3870 | }
|
|---|
| 3871 | }
|
|---|
| 3872 | }
|
|---|
| 3873 | }
|
|---|
| 3874 | dekin += ekin*(1.-xxh);
|
|---|
| 3875 | ekin *= xxh;
|
|---|
| 3876 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 3877 | pvCode = pv[i].getCode();
|
|---|
| 3878 | if ((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 3879 | {
|
|---|
| 3880 | npions += 1;
|
|---|
| 3881 | ek1 += ekin;
|
|---|
| 3882 | }
|
|---|
| 3883 | }
|
|---|
| 3884 | }
|
|---|
| 3885 | if( (ek1 > 0.0) && (npions > 0) )
|
|---|
| 3886 | {
|
|---|
| 3887 | dekin = 1.+dekin/ek1;
|
|---|
| 3888 | for (i = 0; i < vecLen; i++)
|
|---|
| 3889 | {
|
|---|
| 3890 | pvCode = pv[i].getCode();
|
|---|
| 3891 | if((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 3892 | {
|
|---|
| 3893 | ekin = Amax( 1.0e-6, pv[i].getKineticEnergy() * dekin );
|
|---|
| 3894 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 3895 | }
|
|---|
| 3896 | }
|
|---|
| 3897 | }
|
|---|
| 3898 | if (verboseLevel > 1)
|
|---|
| 3899 | { G4cout << " Lab-System " << ek1 << " " << npions << G4endl;
|
|---|
| 3900 | for (i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 3901 | }
|
|---|
| 3902 |
|
|---|
| 3903 | // Add black track particles
|
|---|
| 3904 | // The total number of particles produced is restricted to 198
|
|---|
| 3905 | // this may have influence on very high energies
|
|---|
| 3906 |
|
|---|
| 3907 | if (verboseLevel > 1) G4cout << " Evaporation " << atomicWeight << " " <<
|
|---|
| 3908 | excitationEnergyGNP << " " << excitationEnergyDTA << G4endl;
|
|---|
| 3909 |
|
|---|
| 3910 | if( atomicWeight > 1.5 )
|
|---|
| 3911 | {
|
|---|
| 3912 |
|
|---|
| 3913 | G4double sprob, cost, sint, pp, eka;
|
|---|
| 3914 | G4int spall(0), nbl(0);
|
|---|
| 3915 | // sprob is the probability of self-absorption in heavy molecules
|
|---|
| 3916 |
|
|---|
| 3917 | if( incidentKineticEnergy < 5.0 )
|
|---|
| 3918 | sprob = 0.0;
|
|---|
| 3919 | else
|
|---|
| 3920 | // sprob = Amin( 1.0, 0.6*std::log(incidentKineticEnergy-4.0) );
|
|---|
| 3921 | sprob = Amin(1., 0.000314*atomicWeight*std::log(incidentKineticEnergy-4.));
|
|---|
| 3922 |
|
|---|
| 3923 | // First add protons and neutrons
|
|---|
| 3924 |
|
|---|
| 3925 | if( excitationEnergyGNP >= 0.001 )
|
|---|
| 3926 | {
|
|---|
| 3927 | // nbl = number of proton/neutron black track particles
|
|---|
| 3928 | // tex is their total kinetic energy (GeV)
|
|---|
| 3929 |
|
|---|
| 3930 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyGNP/
|
|---|
| 3931 | (excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 3932 | if( targ+nbl > atomicWeight ) nbl = (int)(atomicWeight - targ);
|
|---|
| 3933 | if (verboseLevel > 1)
|
|---|
| 3934 | G4cout << " evaporation " << targ << " " << nbl << " "
|
|---|
| 3935 | << sprob << G4endl;
|
|---|
| 3936 | spall = targ;
|
|---|
| 3937 | if( nbl > 0)
|
|---|
| 3938 | {
|
|---|
| 3939 | ekin = excitationEnergyGNP/nbl;
|
|---|
| 3940 | ekin2 = 0.0;
|
|---|
| 3941 | for( i=0; i<nbl; i++ )
|
|---|
| 3942 | {
|
|---|
| 3943 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 3944 | if( ekin2 > excitationEnergyGNP) break;
|
|---|
| 3945 | ran = G4UniformRand();
|
|---|
| 3946 | ekin1 = -ekin*std::log(ran) - cfa*(1.0+0.5*normal());
|
|---|
| 3947 | if (ekin1 < 0) ekin1 = -0.010*std::log(ran);
|
|---|
| 3948 | ekin2 += ekin1;
|
|---|
| 3949 | if( ekin2 > excitationEnergyGNP)
|
|---|
| 3950 | ekin1 = Amax( 1.0e-6, excitationEnergyGNP-(ekin2-ekin1) );
|
|---|
| 3951 | if( G4UniformRand() > (1.0-atomicNumber/(atomicWeight)))
|
|---|
| 3952 | pv[vecLen].setDefinition( "Proton");
|
|---|
| 3953 | else
|
|---|
| 3954 | pv[vecLen].setDefinition( "Neutron");
|
|---|
| 3955 | spall++;
|
|---|
| 3956 | cost = G4UniformRand() * 2.0 - 1.0;
|
|---|
| 3957 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 3958 | phi = twopi * G4UniformRand();
|
|---|
| 3959 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 3960 | pv[vecLen].setSide( -4 );
|
|---|
| 3961 | pvMass = pv[vecLen].getMass();
|
|---|
| 3962 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 3963 | pvEnergy = ekin1 + pvMass;
|
|---|
| 3964 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 3965 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 3966 | pp*sint*std::cos(phi),
|
|---|
| 3967 | pp*cost );
|
|---|
| 3968 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 3969 | vecLen++;
|
|---|
| 3970 | }
|
|---|
| 3971 | if( (atomicWeight >= 10.0 ) && (incidentKineticEnergy <= 2.0) )
|
|---|
| 3972 | {
|
|---|
| 3973 | G4int ika, kk = 0;
|
|---|
| 3974 | eka = incidentKineticEnergy;
|
|---|
| 3975 | if( eka > 1.0 )eka *= eka;
|
|---|
| 3976 | eka = Amax( 0.1, eka );
|
|---|
| 3977 | ika = G4int(3.6*std::exp((atomicNumber*atomicNumber
|
|---|
| 3978 | /atomicWeight-35.56)/6.45)/eka);
|
|---|
| 3979 | if( ika > 0 )
|
|---|
| 3980 | {
|
|---|
| 3981 | for( i=(vecLen-1); i>=0; i-- )
|
|---|
| 3982 | {
|
|---|
| 3983 | if( (pv[i].getCode() == protonCode) && pv[i].getFlag() )
|
|---|
| 3984 | {
|
|---|
| 3985 | pTemp = pv[i];
|
|---|
| 3986 | pv[i].setDefinition( "Neutron");
|
|---|
| 3987 | pv[i].setMomentumAndUpdate(pTemp.getMomentum());
|
|---|
| 3988 | if (verboseLevel > 1) pv[i].Print(i);
|
|---|
| 3989 | if( ++kk > ika ) break;
|
|---|
| 3990 | }
|
|---|
| 3991 | }
|
|---|
| 3992 | }
|
|---|
| 3993 | }
|
|---|
| 3994 | }
|
|---|
| 3995 | }
|
|---|
| 3996 |
|
|---|
| 3997 | // Finished adding proton/neutron black track particles
|
|---|
| 3998 | // now, try to add deuterons, tritons and alphas
|
|---|
| 3999 |
|
|---|
| 4000 | if( excitationEnergyDTA >= 0.001 )
|
|---|
| 4001 | {
|
|---|
| 4002 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyDTA
|
|---|
| 4003 | /(excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 4004 |
|
|---|
| 4005 | // nbl is the number of deutrons, tritons, and alphas produced
|
|---|
| 4006 |
|
|---|
| 4007 | if( nbl > 0 )
|
|---|
| 4008 | {
|
|---|
| 4009 | ekin = excitationEnergyDTA/nbl;
|
|---|
| 4010 | ekin2 = 0.0;
|
|---|
| 4011 | for( i=0; i<nbl; i++ )
|
|---|
| 4012 | {
|
|---|
| 4013 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 4014 | if( ekin2 > excitationEnergyDTA) break;
|
|---|
| 4015 | ran = G4UniformRand();
|
|---|
| 4016 | ekin1 = -ekin*std::log(ran)-cfa*(1.+0.5*normal());
|
|---|
| 4017 | if( ekin1 < 0.0 ) ekin1 = -0.010*std::log(ran);
|
|---|
| 4018 | ekin2 += ekin1;
|
|---|
| 4019 | if( ekin2 > excitationEnergyDTA)
|
|---|
| 4020 | ekin1 = Amax( 1.0e-6, excitationEnergyDTA-(ekin2-ekin1));
|
|---|
| 4021 | cost = G4UniformRand()*2.0 - 1.0;
|
|---|
| 4022 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 4023 | phi = twopi*G4UniformRand();
|
|---|
| 4024 | ran = G4UniformRand();
|
|---|
| 4025 | if( ran <= 0.60 )
|
|---|
| 4026 | pv[vecLen].setDefinition( "Deuteron");
|
|---|
| 4027 | else if (ran <= 0.90)
|
|---|
| 4028 | pv[vecLen].setDefinition( "Triton");
|
|---|
| 4029 | else
|
|---|
| 4030 | pv[vecLen].setDefinition( "Alpha");
|
|---|
| 4031 | spall += (int)(pv[vecLen].getMass() * 1.066);
|
|---|
| 4032 | if( spall > atomicWeight ) break;
|
|---|
| 4033 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 4034 | pv[vecLen].setSide( -4 );
|
|---|
| 4035 | pvMass = pv[vecLen].getMass();
|
|---|
| 4036 | pv[vecLen].setSide( pv[vecLen].getCode());
|
|---|
| 4037 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 4038 | pvEnergy = pvMass + ekin1;
|
|---|
| 4039 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 4040 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 4041 | pp*sint*std::cos(phi),
|
|---|
| 4042 | pp*cost );
|
|---|
| 4043 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 4044 | vecLen++;
|
|---|
| 4045 | }
|
|---|
| 4046 | }
|
|---|
| 4047 | }
|
|---|
| 4048 | }
|
|---|
| 4049 | if( centerOfMassEnergy <= (4.0+G4UniformRand()) )
|
|---|
| 4050 | {
|
|---|
| 4051 | for( i=0; i<vecLen; i++ )
|
|---|
| 4052 | {
|
|---|
| 4053 | G4double etb = pv[i].getKineticEnergy();
|
|---|
| 4054 | if( etb >= incidentKineticEnergy )
|
|---|
| 4055 | pv[i].setKineticEnergyAndUpdate( incidentKineticEnergy );
|
|---|
| 4056 | }
|
|---|
| 4057 | }
|
|---|
| 4058 |
|
|---|
| 4059 | // Calculate time delay for nuclear reactions
|
|---|
| 4060 |
|
|---|
| 4061 | G4double tof = incidentTOF;
|
|---|
| 4062 | if( (atomicWeight >= 1.5) && (atomicWeight <= 230.0)
|
|---|
| 4063 | && (incidentKineticEnergy <= 0.2) )
|
|---|
| 4064 | tof -= 500.0 * std::exp(-incidentKineticEnergy /0.04) * std::log( G4UniformRand() );
|
|---|
| 4065 | for ( i=0; i < vecLen; i++)
|
|---|
| 4066 | {
|
|---|
| 4067 |
|
|---|
| 4068 | pv[i].setTOF ( tof );
|
|---|
| 4069 | // vec[i].SetTOF ( tof );
|
|---|
| 4070 | }
|
|---|
| 4071 |
|
|---|
| 4072 | for(i=0; i<vecLen; i++)
|
|---|
| 4073 | {
|
|---|
| 4074 | if(pv[i].getName() == "KaonZero" || pv[i].getName() == "AntiKaonZero")
|
|---|
| 4075 | {
|
|---|
| 4076 | pvmx[0] = pv[i];
|
|---|
| 4077 | if(G4UniformRand() < 0.5) pv[i].setDefinition("KaonZeroShort");
|
|---|
| 4078 | else pv[i].setDefinition("KaonZeroLong");
|
|---|
| 4079 | pv[i].setMomentumAndUpdate(pvmx[0].getMomentum());
|
|---|
| 4080 | }
|
|---|
| 4081 | }
|
|---|
| 4082 |
|
|---|
| 4083 | successful = true;
|
|---|
| 4084 | delete [] pvmx;
|
|---|
| 4085 | return;
|
|---|
| 4086 | }
|
|---|
| 4087 |
|
|---|
| 4088 | void
|
|---|
| 4089 | G4HEInelastic::MediumEnergyClusterProduction(G4bool &successful,
|
|---|
| 4090 | G4HEVector pv[],
|
|---|
| 4091 | G4int &vecLen,
|
|---|
| 4092 | G4double &excitationEnergyGNP,
|
|---|
| 4093 | G4double &excitationEnergyDTA,
|
|---|
| 4094 | G4HEVector incidentParticle,
|
|---|
| 4095 | G4HEVector targetParticle,
|
|---|
| 4096 | G4double atomicWeight,
|
|---|
| 4097 | G4double atomicNumber)
|
|---|
| 4098 | {
|
|---|
| 4099 | // For low multiplicity in the first intranuclear interaction the cascading
|
|---|
| 4100 | // process as described in G4HEInelastic::MediumEnergyCascading does not work
|
|---|
| 4101 | // satisfactorily. From experimental data it is strongly suggested to use
|
|---|
| 4102 | // a two- body resonance model.
|
|---|
| 4103 | //
|
|---|
| 4104 | // All quantities on the G4HEVector Array pv are in GeV- units.
|
|---|
| 4105 |
|
|---|
| 4106 | G4int protonCode = Proton.getCode();
|
|---|
| 4107 | G4double protonMass = Proton.getMass();
|
|---|
| 4108 | G4int neutronCode = Neutron.getCode();
|
|---|
| 4109 | G4double kaonPlusMass = KaonPlus.getMass();
|
|---|
| 4110 | G4int pionPlusCode = PionPlus.getCode();
|
|---|
| 4111 | G4int pionZeroCode = PionZero.getCode();
|
|---|
| 4112 | G4int pionMinusCode = PionMinus.getCode();
|
|---|
| 4113 | G4String mesonType = PionPlus.getType();
|
|---|
| 4114 | G4String baryonType = Proton.getType();
|
|---|
| 4115 | G4String antiBaryonType= AntiProton.getType();
|
|---|
| 4116 |
|
|---|
| 4117 | G4double targetMass = targetParticle.getMass();
|
|---|
| 4118 |
|
|---|
| 4119 | G4int incidentCode = incidentParticle.getCode();
|
|---|
| 4120 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 4121 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 4122 | G4double incidentEnergy = incidentParticle.getEnergy();
|
|---|
| 4123 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 4124 | G4String incidentType = incidentParticle.getType();
|
|---|
| 4125 | // G4double incidentTOF = incidentParticle.getTOF();
|
|---|
| 4126 | G4double incidentTOF = 0.;
|
|---|
| 4127 |
|
|---|
| 4128 | // some local variables
|
|---|
| 4129 |
|
|---|
| 4130 | G4int i, j;
|
|---|
| 4131 |
|
|---|
| 4132 | if(verboseLevel > 1) G4cout << " G4HEInelastic::MediumEnergyClusterProduction " << G4endl;
|
|---|
| 4133 |
|
|---|
| 4134 | if (incidentTotalMomentum < 0.01)
|
|---|
| 4135 | {
|
|---|
| 4136 | successful = false;
|
|---|
| 4137 | return;
|
|---|
| 4138 | }
|
|---|
| 4139 | G4double centerOfMassEnergy = std::sqrt( sqr(incidentMass) + sqr(targetMass)
|
|---|
| 4140 | +2.*targetMass*incidentEnergy);
|
|---|
| 4141 |
|
|---|
| 4142 | G4HEVector pvI = incidentParticle; // for the incident particle
|
|---|
| 4143 | pvI.setSide( 1 );
|
|---|
| 4144 |
|
|---|
| 4145 | G4HEVector pvT = targetParticle; // for the target particle
|
|---|
| 4146 | pvT.setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 4147 | pvT.setSide( -1 );
|
|---|
| 4148 | pvT.setTOF( -1.);
|
|---|
| 4149 |
|
|---|
| 4150 | // Distribute particles in forward and backward hemispheres. Note that
|
|---|
| 4151 | // only low multiplicity events from FirstIntInNuc.... should go into
|
|---|
| 4152 | // this routine.
|
|---|
| 4153 |
|
|---|
| 4154 | G4int targ = 0;
|
|---|
| 4155 | G4int ifor = 0;
|
|---|
| 4156 | G4int iback = 0;
|
|---|
| 4157 | G4int pvCode;
|
|---|
| 4158 | G4double pvMass, pvEnergy;
|
|---|
| 4159 |
|
|---|
| 4160 | pv[0].setSide( 1 );
|
|---|
| 4161 | pv[1].setSide( -1 );
|
|---|
| 4162 | for(i = 0; i < vecLen; i++)
|
|---|
| 4163 | {
|
|---|
| 4164 | if (i > 1)
|
|---|
| 4165 | {
|
|---|
| 4166 | if( G4UniformRand() < 0.5)
|
|---|
| 4167 | {
|
|---|
| 4168 | pv[i].setSide( 1 );
|
|---|
| 4169 | if (++ifor > 18)
|
|---|
| 4170 | {
|
|---|
| 4171 | pv[i].setSide( -1 );
|
|---|
| 4172 | ifor--;
|
|---|
| 4173 | iback++;
|
|---|
| 4174 | }
|
|---|
| 4175 | }
|
|---|
| 4176 | else
|
|---|
| 4177 | {
|
|---|
| 4178 | pv[i].setSide( -1 );
|
|---|
| 4179 | if (++iback > 18)
|
|---|
| 4180 | {
|
|---|
| 4181 | pv[i].setSide( 1 );
|
|---|
| 4182 | ifor++;
|
|---|
| 4183 | iback--;
|
|---|
| 4184 | }
|
|---|
| 4185 | }
|
|---|
| 4186 | }
|
|---|
| 4187 |
|
|---|
| 4188 | pvCode = pv[i].getCode();
|
|---|
| 4189 |
|
|---|
| 4190 | if ( ( (incidentCode == protonCode) || (incidentCode == neutronCode)
|
|---|
| 4191 | || (incidentType == mesonType) )
|
|---|
| 4192 | && ( (pvCode == pionPlusCode) || (pvCode == pionMinusCode) )
|
|---|
| 4193 | && ( (G4UniformRand() < (10.-incidentTotalMomentum)/6.) )
|
|---|
| 4194 | && ( (G4UniformRand() < atomicWeight/300.) ) )
|
|---|
| 4195 | {
|
|---|
| 4196 | if (G4UniformRand() > atomicNumber/atomicWeight)
|
|---|
| 4197 | pv[i].setDefinition( "Neutron");
|
|---|
| 4198 | else
|
|---|
| 4199 | pv[i].setDefinition( "Proton");
|
|---|
| 4200 | targ++;
|
|---|
| 4201 | }
|
|---|
| 4202 | pv[i].setTOF( incidentTOF );
|
|---|
| 4203 | }
|
|---|
| 4204 | G4double tb = 2. * iback;
|
|---|
| 4205 | if (centerOfMassEnergy < (2+G4UniformRand())) tb = (2.*iback + vecLen)/2.;
|
|---|
| 4206 |
|
|---|
| 4207 | G4double nucsup[] = { 1.0, 0.8, 0.6, 0.5, 0.4};
|
|---|
| 4208 |
|
|---|
| 4209 | G4double xtarg = Amax(0.01, (0.312+0.2*std::log(std::log(centerOfMassEnergy*centerOfMassEnergy)))
|
|---|
| 4210 | * (std::pow(atomicWeight,0.33)-1.) * tb);
|
|---|
| 4211 | G4int ntarg = Poisson(xtarg);
|
|---|
| 4212 | if (ntarg > 0)
|
|---|
| 4213 | {
|
|---|
| 4214 | G4int ipx = Imin(4, (G4int)(incidentTotalMomentum/3.));
|
|---|
| 4215 | for (i=0; i < ntarg; i++)
|
|---|
| 4216 | {
|
|---|
| 4217 | if (G4UniformRand() < nucsup[ipx] )
|
|---|
| 4218 | {
|
|---|
| 4219 | if (G4UniformRand() < (1.- atomicNumber/atomicWeight))
|
|---|
| 4220 | pv[vecLen].setDefinition( "Neutron");
|
|---|
| 4221 | else
|
|---|
| 4222 | pv[vecLen].setDefinition( "Proton");
|
|---|
| 4223 | targ++;
|
|---|
| 4224 | }
|
|---|
| 4225 | else
|
|---|
| 4226 | {
|
|---|
| 4227 | G4double ran = G4UniformRand();
|
|---|
| 4228 | if (ran < 0.3333 )
|
|---|
| 4229 | pv[vecLen].setDefinition( "PionPlus");
|
|---|
| 4230 | else if (ran < 0.6666)
|
|---|
| 4231 | pv[vecLen].setDefinition( "PionZero");
|
|---|
| 4232 | else
|
|---|
| 4233 | pv[vecLen].setDefinition( "PionMinus");
|
|---|
| 4234 | }
|
|---|
| 4235 | pv[vecLen].setSide( -2 );
|
|---|
| 4236 | pv[vecLen].setFlag( true );
|
|---|
| 4237 | pv[vecLen].setTOF( incidentTOF );
|
|---|
| 4238 | vecLen++;
|
|---|
| 4239 | }
|
|---|
| 4240 | }
|
|---|
| 4241 |
|
|---|
| 4242 | // Mark leading particles for incident strange particles and antibaryons,
|
|---|
| 4243 | // for all other we assume that the first and second particle are the
|
|---|
| 4244 | // leading particles.
|
|---|
| 4245 | // We need this later for kinematic aspects of strangeness conservation.
|
|---|
| 4246 |
|
|---|
| 4247 | G4int lead = 0;
|
|---|
| 4248 | G4HEVector leadParticle;
|
|---|
| 4249 | if( (incidentMass >= kaonPlusMass-0.05) && (incidentCode != protonCode)
|
|---|
| 4250 | && (incidentCode != neutronCode) )
|
|---|
| 4251 | {
|
|---|
| 4252 | G4double pMass = pv[0].getMass();
|
|---|
| 4253 | G4int pCode = pv[0].getCode();
|
|---|
| 4254 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 4255 | && (pCode != neutronCode) )
|
|---|
| 4256 | {
|
|---|
| 4257 | lead = pCode;
|
|---|
| 4258 | leadParticle = pv[0];
|
|---|
| 4259 | }
|
|---|
| 4260 | else
|
|---|
| 4261 | {
|
|---|
| 4262 | pMass = pv[1].getMass();
|
|---|
| 4263 | pCode = pv[1].getCode();
|
|---|
| 4264 | if( (pMass >= kaonPlusMass-0.05) && (pCode != protonCode)
|
|---|
| 4265 | && (pCode != neutronCode) )
|
|---|
| 4266 | {
|
|---|
| 4267 | lead = pCode;
|
|---|
| 4268 | leadParticle = pv[1];
|
|---|
| 4269 | }
|
|---|
| 4270 | }
|
|---|
| 4271 | }
|
|---|
| 4272 |
|
|---|
| 4273 | if (verboseLevel > 1) {
|
|---|
| 4274 | G4cout << " pv Vector after initialization " << vecLen << G4endl;
|
|---|
| 4275 | pvI.Print(-1);
|
|---|
| 4276 | pvT.Print(-1);
|
|---|
| 4277 | for (i=0; i < vecLen ; i++) pv[i].Print(i);
|
|---|
| 4278 | }
|
|---|
| 4279 |
|
|---|
| 4280 | G4double tavai = 0.;
|
|---|
| 4281 | for(i=0;i<vecLen;i++) if(pv[i].getSide() != -2) tavai += pv[i].getMass();
|
|---|
| 4282 |
|
|---|
| 4283 | while (tavai > centerOfMassEnergy)
|
|---|
| 4284 | {
|
|---|
| 4285 | for (i=vecLen-1; i >= 0; i--)
|
|---|
| 4286 | {
|
|---|
| 4287 | if (pv[i].getSide() != -2)
|
|---|
| 4288 | {
|
|---|
| 4289 | tavai -= pv[i].getMass();
|
|---|
| 4290 | if( i != vecLen-1)
|
|---|
| 4291 | {
|
|---|
| 4292 | for (j=i; j < vecLen; j++)
|
|---|
| 4293 | {
|
|---|
| 4294 | pv[j] = pv[j+1];
|
|---|
| 4295 | }
|
|---|
| 4296 | }
|
|---|
| 4297 | if ( --vecLen < 2)
|
|---|
| 4298 | {
|
|---|
| 4299 | successful = false;
|
|---|
| 4300 | return;
|
|---|
| 4301 | }
|
|---|
| 4302 | break;
|
|---|
| 4303 | }
|
|---|
| 4304 | }
|
|---|
| 4305 | }
|
|---|
| 4306 |
|
|---|
| 4307 | // Now produce 3 Clusters:
|
|---|
| 4308 | // 1. forward cluster
|
|---|
| 4309 | // 2. backward meson cluster
|
|---|
| 4310 | // 3. backward nucleon cluster
|
|---|
| 4311 |
|
|---|
| 4312 | G4double rmc0 = 0., rmd0 = 0., rme0 = 0.;
|
|---|
| 4313 | G4int ntc = 0, ntd = 0, nte = 0;
|
|---|
| 4314 |
|
|---|
| 4315 | for (i=0; i < vecLen; i++)
|
|---|
| 4316 | {
|
|---|
| 4317 | if(pv[i].getSide() > 0)
|
|---|
| 4318 | {
|
|---|
| 4319 | if(ntc < 17)
|
|---|
| 4320 | {
|
|---|
| 4321 | rmc0 += pv[i].getMass();
|
|---|
| 4322 | ntc++;
|
|---|
| 4323 | }
|
|---|
| 4324 | else
|
|---|
| 4325 | {
|
|---|
| 4326 | if(ntd < 17)
|
|---|
| 4327 | {
|
|---|
| 4328 | pv[i].setSide(-1);
|
|---|
| 4329 | rmd0 += pv[i].getMass();
|
|---|
| 4330 | ntd++;
|
|---|
| 4331 | }
|
|---|
| 4332 | else
|
|---|
| 4333 | {
|
|---|
| 4334 | pv[i].setSide(-2);
|
|---|
| 4335 | rme0 += pv[i].getMass();
|
|---|
| 4336 | nte++;
|
|---|
| 4337 | }
|
|---|
| 4338 | }
|
|---|
| 4339 | }
|
|---|
| 4340 | else if (pv[i].getSide() == -1)
|
|---|
| 4341 | {
|
|---|
| 4342 | if(ntd < 17)
|
|---|
| 4343 | {
|
|---|
| 4344 | rmd0 += pv[i].getMass();
|
|---|
| 4345 | ntd++;
|
|---|
| 4346 | }
|
|---|
| 4347 | else
|
|---|
| 4348 | {
|
|---|
| 4349 | pv[i].setSide(-2);
|
|---|
| 4350 | rme0 += pv[i].getMass();
|
|---|
| 4351 | nte++;
|
|---|
| 4352 | }
|
|---|
| 4353 | }
|
|---|
| 4354 | else
|
|---|
| 4355 | {
|
|---|
| 4356 | rme0 += pv[i].getMass();
|
|---|
| 4357 | nte++;
|
|---|
| 4358 | }
|
|---|
| 4359 | }
|
|---|
| 4360 |
|
|---|
| 4361 | G4double cpar[] = {0.6, 0.6, 0.35, 0.15, 0.10};
|
|---|
| 4362 | G4double gpar[] = {2.6, 2.6, 1.80, 1.30, 1.20};
|
|---|
| 4363 |
|
|---|
| 4364 | G4double rmc = rmc0, rmd = rmd0, rme = rme0;
|
|---|
| 4365 | G4int ntc1 = Imin(4,ntc-1);
|
|---|
| 4366 | G4int ntd1 = Imin(4,ntd-1);
|
|---|
| 4367 | G4int nte1 = Imin(4,nte-1);
|
|---|
| 4368 | if (ntc > 1) rmc = rmc0 + std::pow(-std::log(1.-G4UniformRand()),cpar[ntc1])/gpar[ntc1];
|
|---|
| 4369 | if (ntd > 1) rmd = rmd0 + std::pow(-std::log(1.-G4UniformRand()),cpar[ntd1])/gpar[ntd1];
|
|---|
| 4370 | if (nte > 1) rme = rme0 + std::pow(-std::log(1.-G4UniformRand()),cpar[nte1])/gpar[nte1];
|
|---|
| 4371 | while( (rmc+rmd) > centerOfMassEnergy)
|
|---|
| 4372 | {
|
|---|
| 4373 | if ((rmc == rmc0) && (rmd == rmd0))
|
|---|
| 4374 | {
|
|---|
| 4375 | rmd *= 0.999*centerOfMassEnergy/(rmc+rmd);
|
|---|
| 4376 | rmc *= 0.999*centerOfMassEnergy/(rmc+rmd);
|
|---|
| 4377 | }
|
|---|
| 4378 | else
|
|---|
| 4379 | {
|
|---|
| 4380 | rmc = 0.1*rmc0 + 0.9*rmc;
|
|---|
| 4381 | rmd = 0.1*rmd0 + 0.9*rmd;
|
|---|
| 4382 | }
|
|---|
| 4383 | }
|
|---|
| 4384 | if(verboseLevel > 1)
|
|---|
| 4385 | G4cout << " Cluster Masses: " << ntc << " " << rmc << " " << ntd << " "
|
|---|
| 4386 | << rmd << " " << nte << " " << rme << G4endl;
|
|---|
| 4387 |
|
|---|
| 4388 |
|
|---|
| 4389 | G4HEVector* pvmx = new G4HEVector[11];
|
|---|
| 4390 |
|
|---|
| 4391 | pvmx[1].setMass( incidentMass);
|
|---|
| 4392 | pvmx[1].setMomentumAndUpdate( 0., 0., incidentTotalMomentum);
|
|---|
| 4393 | pvmx[2].setMass( targetMass);
|
|---|
| 4394 | pvmx[2].setMomentumAndUpdate( 0., 0., 0.);
|
|---|
| 4395 | pvmx[0].Add( pvmx[1], pvmx[2] );
|
|---|
| 4396 | pvmx[1].Lor( pvmx[1], pvmx[0] );
|
|---|
| 4397 | pvmx[2].Lor( pvmx[2], pvmx[0] );
|
|---|
| 4398 |
|
|---|
| 4399 | G4double pf = std::sqrt(Amax(0.0001, sqr(sqr(centerOfMassEnergy) + rmd*rmd -rmc*rmc)
|
|---|
| 4400 | - 4*sqr(centerOfMassEnergy)*rmd*rmd))/(2.*centerOfMassEnergy);
|
|---|
| 4401 | pvmx[3].setMass( rmc );
|
|---|
| 4402 | pvmx[4].setMass( rmd );
|
|---|
| 4403 | pvmx[3].setEnergy( std::sqrt(pf*pf + rmc*rmc) );
|
|---|
| 4404 | pvmx[4].setEnergy( std::sqrt(pf*pf + rmd*rmd) );
|
|---|
| 4405 |
|
|---|
| 4406 | G4double tvalue = -MAXFLOAT;
|
|---|
| 4407 | G4double bvalue = Amax(0.01, 4.0 + 1.6*std::log(incidentTotalMomentum));
|
|---|
| 4408 | if (bvalue != 0.0) tvalue = std::log(G4UniformRand())/bvalue;
|
|---|
| 4409 | G4double pin = pvmx[1].Length();
|
|---|
| 4410 | G4double tacmin = sqr( pvmx[1].getEnergy() - pvmx[3].getEnergy()) - sqr( pin - pf);
|
|---|
| 4411 | G4double ctet = Amax(-1., Amin(1., 1.+2.*(tvalue-tacmin)/Amax(1.e-10, 4.*pin*pf)));
|
|---|
| 4412 | G4double stet = std::sqrt(Amax(0., 1.0 - ctet*ctet));
|
|---|
| 4413 | G4double phi = twopi * G4UniformRand();
|
|---|
| 4414 | pvmx[3].setMomentum( pf * stet * std::sin(phi),
|
|---|
| 4415 | pf * stet * std::cos(phi),
|
|---|
| 4416 | pf * ctet );
|
|---|
| 4417 | pvmx[4].Smul( pvmx[3], -1.);
|
|---|
| 4418 |
|
|---|
| 4419 | if (nte > 0)
|
|---|
| 4420 | {
|
|---|
| 4421 | G4double ekit1 = 0.04;
|
|---|
| 4422 | G4double ekit2 = 0.6;
|
|---|
| 4423 | G4double gaval = 1.2;
|
|---|
| 4424 | if (incidentKineticEnergy <= 5.)
|
|---|
| 4425 | {
|
|---|
| 4426 | ekit1 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 4427 | ekit2 *= sqr(incidentKineticEnergy)/25.;
|
|---|
| 4428 | }
|
|---|
| 4429 | G4double avalue = (1.-gaval)/(std::pow(ekit2, 1.-gaval)-std::pow(ekit1, 1.-gaval));
|
|---|
| 4430 | for (i=0; i < vecLen; i++)
|
|---|
| 4431 | {
|
|---|
| 4432 | if (pv[i].getSide() == -2)
|
|---|
| 4433 | {
|
|---|
| 4434 | G4double ekit = std::pow(G4UniformRand()*(1.-gaval)/avalue +std::pow(ekit1, 1.-gaval),
|
|---|
| 4435 | 1./(1.-gaval));
|
|---|
| 4436 | pv[i].setKineticEnergyAndUpdate( ekit );
|
|---|
| 4437 | ctet = Amax(-1., Amin(1., std::log(2.23*G4UniformRand()+0.383)/0.96));
|
|---|
| 4438 | stet = std::sqrt( Amax( 0.0, 1. - ctet*ctet ));
|
|---|
| 4439 | phi = G4UniformRand()*twopi;
|
|---|
| 4440 | G4double pp = pv[i].Length();
|
|---|
| 4441 | pv[i].setMomentum( pp * stet * std::sin(phi),
|
|---|
| 4442 | pp * stet * std::cos(phi),
|
|---|
| 4443 | pp * ctet );
|
|---|
| 4444 | pv[i].Lor( pv[i], pvmx[0] );
|
|---|
| 4445 | }
|
|---|
| 4446 | }
|
|---|
| 4447 | }
|
|---|
| 4448 | // pvmx[1] = pvmx[3];
|
|---|
| 4449 | // pvmx[2] = pvmx[4];
|
|---|
| 4450 | pvmx[5].SmulAndUpdate( pvmx[3], -1.);
|
|---|
| 4451 | pvmx[6].SmulAndUpdate( pvmx[4], -1.);
|
|---|
| 4452 |
|
|---|
| 4453 | if (verboseLevel > 1) {
|
|---|
| 4454 | G4cout << " General vectors before Phase space Generation " << G4endl;
|
|---|
| 4455 | for (i=0; i<7; i++) pvmx[i].Print(i);
|
|---|
| 4456 | }
|
|---|
| 4457 |
|
|---|
| 4458 |
|
|---|
| 4459 | G4HEVector* tempV = new G4HEVector[18];
|
|---|
| 4460 | G4bool constantCrossSection = true;
|
|---|
| 4461 | G4double wgt;
|
|---|
| 4462 | G4int npg;
|
|---|
| 4463 |
|
|---|
| 4464 | if (ntc > 1)
|
|---|
| 4465 | {
|
|---|
| 4466 | npg = 0;
|
|---|
| 4467 | for (i=0; i < vecLen; i++)
|
|---|
| 4468 | {
|
|---|
| 4469 | if (pv[i].getSide() > 0)
|
|---|
| 4470 | {
|
|---|
| 4471 | tempV[npg++] = pv[i];
|
|---|
| 4472 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4473 | }
|
|---|
| 4474 | }
|
|---|
| 4475 | wgt = NBodyPhaseSpace( pvmx[3].getMass(), constantCrossSection, tempV, npg);
|
|---|
| 4476 |
|
|---|
| 4477 | npg = 0;
|
|---|
| 4478 | for (i=0; i < vecLen; i++)
|
|---|
| 4479 | {
|
|---|
| 4480 | if (pv[i].getSide() > 0)
|
|---|
| 4481 | {
|
|---|
| 4482 | pv[i].setMomentum( tempV[npg++].getMomentum());
|
|---|
| 4483 | pv[i].SmulAndUpdate( pv[i], 1. );
|
|---|
| 4484 | pv[i].Lor( pv[i], pvmx[5] );
|
|---|
| 4485 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4486 | }
|
|---|
| 4487 | }
|
|---|
| 4488 | }
|
|---|
| 4489 | else if(ntc == 1)
|
|---|
| 4490 | {
|
|---|
| 4491 | for(i=0; i<vecLen; i++)
|
|---|
| 4492 | {
|
|---|
| 4493 | if(pv[i].getSide() > 0) pv[i].setMomentumAndUpdate(pvmx[3].getMomentum());
|
|---|
| 4494 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4495 | }
|
|---|
| 4496 | }
|
|---|
| 4497 | else
|
|---|
| 4498 | {
|
|---|
| 4499 | }
|
|---|
| 4500 |
|
|---|
| 4501 | if (ntd > 1)
|
|---|
| 4502 | {
|
|---|
| 4503 | npg = 0;
|
|---|
| 4504 | for (i=0; i < vecLen; i++)
|
|---|
| 4505 | {
|
|---|
| 4506 | if (pv[i].getSide() == -1)
|
|---|
| 4507 | {
|
|---|
| 4508 | tempV[npg++] = pv[i];
|
|---|
| 4509 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4510 | }
|
|---|
| 4511 | }
|
|---|
| 4512 | wgt = NBodyPhaseSpace( pvmx[4].getMass(), constantCrossSection, tempV, npg);
|
|---|
| 4513 |
|
|---|
| 4514 | npg = 0;
|
|---|
| 4515 | for (i=0; i < vecLen; i++)
|
|---|
| 4516 | {
|
|---|
| 4517 | if (pv[i].getSide() == -1)
|
|---|
| 4518 | {
|
|---|
| 4519 | pv[i].setMomentum( tempV[npg++].getMomentum());
|
|---|
| 4520 | pv[i].SmulAndUpdate( pv[i], 1.);
|
|---|
| 4521 | pv[i].Lor( pv[i], pvmx[6] );
|
|---|
| 4522 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4523 | }
|
|---|
| 4524 | }
|
|---|
| 4525 | }
|
|---|
| 4526 | else if(ntd == 1)
|
|---|
| 4527 | {
|
|---|
| 4528 | for(i=0; i<vecLen; i++)
|
|---|
| 4529 | {
|
|---|
| 4530 | if(pv[i].getSide() == -1) pv[i].setMomentumAndUpdate(pvmx[4].getMomentum());
|
|---|
| 4531 | if(verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4532 | }
|
|---|
| 4533 | }
|
|---|
| 4534 | else
|
|---|
| 4535 | {
|
|---|
| 4536 | }
|
|---|
| 4537 |
|
|---|
| 4538 | if(verboseLevel > 1)
|
|---|
| 4539 | {
|
|---|
| 4540 | G4cout << " Vectors after PhaseSpace generation " << G4endl;
|
|---|
| 4541 | for(i=0;i<vecLen; i++) pv[i].Print(i);
|
|---|
| 4542 | }
|
|---|
| 4543 |
|
|---|
| 4544 | // Lorentz transformation in lab system
|
|---|
| 4545 |
|
|---|
| 4546 | targ = 0;
|
|---|
| 4547 | for( i=0; i < vecLen; i++ )
|
|---|
| 4548 | {
|
|---|
| 4549 | if( pv[i].getType() == baryonType )targ++;
|
|---|
| 4550 | if( pv[i].getType() == antiBaryonType )targ++;
|
|---|
| 4551 | pv[i].Lor( pv[i], pvmx[2] );
|
|---|
| 4552 | }
|
|---|
| 4553 | if (targ <1) targ =1;
|
|---|
| 4554 |
|
|---|
| 4555 | if(verboseLevel > 1) {
|
|---|
| 4556 | G4cout << " Transformation in Lab- System " << G4endl;
|
|---|
| 4557 | for(i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 4558 | }
|
|---|
| 4559 |
|
|---|
| 4560 | G4bool dum(0);
|
|---|
| 4561 | G4double ekin, teta;
|
|---|
| 4562 |
|
|---|
| 4563 | if( lead )
|
|---|
| 4564 | {
|
|---|
| 4565 | for( i=0; i<vecLen; i++ )
|
|---|
| 4566 | {
|
|---|
| 4567 | if( pv[i].getCode() == lead )
|
|---|
| 4568 | {
|
|---|
| 4569 | dum = false;
|
|---|
| 4570 | break;
|
|---|
| 4571 | }
|
|---|
| 4572 | }
|
|---|
| 4573 | if( dum )
|
|---|
| 4574 | {
|
|---|
| 4575 | i = 0;
|
|---|
| 4576 |
|
|---|
| 4577 | if( ( (leadParticle.getType() == baryonType ||
|
|---|
| 4578 | leadParticle.getType() == antiBaryonType)
|
|---|
| 4579 | && (pv[1].getType() == baryonType ||
|
|---|
| 4580 | pv[1].getType() == antiBaryonType))
|
|---|
| 4581 | || ( (leadParticle.getType() == mesonType)
|
|---|
| 4582 | && (pv[1].getType() == mesonType)))
|
|---|
| 4583 | {
|
|---|
| 4584 | i = 1;
|
|---|
| 4585 | }
|
|---|
| 4586 |
|
|---|
| 4587 | ekin = pv[i].getKineticEnergy();
|
|---|
| 4588 | pv[i] = leadParticle;
|
|---|
| 4589 | if( pv[i].getFlag() )
|
|---|
| 4590 | pv[i].setTOF( -1.0 );
|
|---|
| 4591 | else
|
|---|
| 4592 | pv[i].setTOF( 1.0 );
|
|---|
| 4593 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 4594 | }
|
|---|
| 4595 | }
|
|---|
| 4596 |
|
|---|
| 4597 | pvmx[4].setMass( incidentMass);
|
|---|
| 4598 | pvmx[4].setMomentumAndUpdate( 0.0, 0.0, incidentTotalMomentum );
|
|---|
| 4599 |
|
|---|
| 4600 | G4double ekin0 = pvmx[4].getKineticEnergy();
|
|---|
| 4601 |
|
|---|
| 4602 | pvmx[5].setMass ( protonMass * targ);
|
|---|
| 4603 | pvmx[5].setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 4604 |
|
|---|
| 4605 | ekin = pvmx[4].getEnergy() + pvmx[5].getEnergy();
|
|---|
| 4606 |
|
|---|
| 4607 | pvmx[6].Add( pvmx[4], pvmx[5] );
|
|---|
| 4608 | pvmx[4].Lor( pvmx[4], pvmx[6] );
|
|---|
| 4609 | pvmx[5].Lor( pvmx[5], pvmx[6] );
|
|---|
| 4610 |
|
|---|
| 4611 | G4double tecm = pvmx[4].getEnergy() + pvmx[5].getEnergy();
|
|---|
| 4612 |
|
|---|
| 4613 | pvmx[8].setZero();
|
|---|
| 4614 |
|
|---|
| 4615 | G4double ekin1 = 0.0;
|
|---|
| 4616 |
|
|---|
| 4617 | for( i=0; i < vecLen; i++ )
|
|---|
| 4618 | {
|
|---|
| 4619 | pvmx[8].Add( pvmx[8], pv[i] );
|
|---|
| 4620 | ekin1 += pv[i].getKineticEnergy();
|
|---|
| 4621 | ekin -= pv[i].getMass();
|
|---|
| 4622 | }
|
|---|
| 4623 |
|
|---|
| 4624 | if( vecLen > 1 && vecLen < 19 )
|
|---|
| 4625 | {
|
|---|
| 4626 | constantCrossSection = true;
|
|---|
| 4627 | G4HEVector pw[18];
|
|---|
| 4628 | for(i=0;i<vecLen;i++) pw[i] = pv[i];
|
|---|
| 4629 | wgt = NBodyPhaseSpace( tecm, constantCrossSection, pw, vecLen );
|
|---|
| 4630 | ekin = 0.0;
|
|---|
| 4631 | for( i=0; i < vecLen; i++ )
|
|---|
| 4632 | {
|
|---|
| 4633 | pvmx[7].setMass( pw[i].getMass());
|
|---|
| 4634 | pvmx[7].setMomentum( pw[i].getMomentum() );
|
|---|
| 4635 | pvmx[7].SmulAndUpdate( pvmx[7], 1.);
|
|---|
| 4636 | pvmx[7].Lor( pvmx[7], pvmx[5] );
|
|---|
| 4637 | ekin += pvmx[7].getKineticEnergy();
|
|---|
| 4638 | }
|
|---|
| 4639 | teta = pvmx[8].Ang( pvmx[4] );
|
|---|
| 4640 | if (verboseLevel > 1)
|
|---|
| 4641 | G4cout << " vecLen > 1 && vecLen < 19 " << teta << " " << ekin0
|
|---|
| 4642 | << " " << ekin1 << " " << ekin << G4endl;
|
|---|
| 4643 | }
|
|---|
| 4644 |
|
|---|
| 4645 | if( ekin1 != 0.0 )
|
|---|
| 4646 | {
|
|---|
| 4647 | pvmx[7].setZero();
|
|---|
| 4648 | wgt = ekin/ekin1;
|
|---|
| 4649 | ekin1 = 0.;
|
|---|
| 4650 | for( i=0; i < vecLen; i++ )
|
|---|
| 4651 | {
|
|---|
| 4652 | pvMass = pv[i].getMass();
|
|---|
| 4653 | ekin = pv[i].getKineticEnergy() * wgt;
|
|---|
| 4654 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 4655 | ekin1 += ekin;
|
|---|
| 4656 | pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 4657 | }
|
|---|
| 4658 | teta = pvmx[7].Ang( pvmx[4] );
|
|---|
| 4659 | if (verboseLevel > 1)
|
|---|
| 4660 | G4cout << " ekin1 != 0 " << teta << " " << ekin0 << " "
|
|---|
| 4661 | << ekin1 << G4endl;
|
|---|
| 4662 | }
|
|---|
| 4663 |
|
|---|
| 4664 | // Do some smearing in the transverse direction due to Fermi motion.
|
|---|
| 4665 |
|
|---|
| 4666 | G4double ry = G4UniformRand();
|
|---|
| 4667 | G4double rz = G4UniformRand();
|
|---|
| 4668 | G4double rx = twopi*rz;
|
|---|
| 4669 | G4double a1 = std::sqrt(-2.0*std::log(ry));
|
|---|
| 4670 | G4double rantarg1 = a1*std::cos(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 4671 | G4double rantarg2 = a1*std::sin(rx)*0.02*targ/G4double(vecLen);
|
|---|
| 4672 |
|
|---|
| 4673 | for (i = 0; i < vecLen; i++)
|
|---|
| 4674 | pv[i].setMomentum( pv[i].getMomentum().x()+rantarg1,
|
|---|
| 4675 | pv[i].getMomentum().y()+rantarg2 );
|
|---|
| 4676 |
|
|---|
| 4677 | if (verboseLevel > 1) {
|
|---|
| 4678 | pvmx[7].setZero();
|
|---|
| 4679 | for (i = 0; i < vecLen; i++) pvmx[7].Add( pvmx[7], pv[i] );
|
|---|
| 4680 | teta = pvmx[7].Ang( pvmx[4] );
|
|---|
| 4681 | G4cout << " After smearing " << teta << G4endl;
|
|---|
| 4682 | }
|
|---|
| 4683 |
|
|---|
| 4684 | // Rotate in the direction of the primary particle momentum (z-axis).
|
|---|
| 4685 | // This does disturb our inclusive distributions somewhat, but it is
|
|---|
| 4686 | // necessary for momentum conservation.
|
|---|
| 4687 |
|
|---|
| 4688 | // Also subtract binding energies and make some further corrections
|
|---|
| 4689 | // if required.
|
|---|
| 4690 |
|
|---|
| 4691 | G4double dekin = 0.0;
|
|---|
| 4692 | G4int npions = 0;
|
|---|
| 4693 | G4double ek1 = 0.0;
|
|---|
| 4694 | G4double alekw, xxh;
|
|---|
| 4695 | G4double cfa = 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.);
|
|---|
| 4696 | G4double alem[] = {1.40, 2.30, 2.70, 3.00, 3.40, 4.60, 7.00};
|
|---|
| 4697 | G4double val0[] = {0.00, 0.40, 0.48, 0.51, 0.54, 0.60, 0.65};
|
|---|
| 4698 |
|
|---|
| 4699 |
|
|---|
| 4700 | for (i = 0; i < vecLen; i++)
|
|---|
| 4701 | {
|
|---|
| 4702 | pv[i].Defs1( pv[i], pvI );
|
|---|
| 4703 | if (atomicWeight > 1.5)
|
|---|
| 4704 | {
|
|---|
| 4705 | ekin = Amax( 1.e-6,pv[i].getKineticEnergy() - cfa*( 1. + 0.5*normal()));
|
|---|
| 4706 | alekw = std::log( incidentKineticEnergy );
|
|---|
| 4707 | xxh = 1.;
|
|---|
| 4708 | xxh = 1.;
|
|---|
| 4709 | if(incidentCode == pionPlusCode || incidentCode == pionMinusCode)
|
|---|
| 4710 | {
|
|---|
| 4711 | if(pv[i].getCode() == pionZeroCode)
|
|---|
| 4712 | {
|
|---|
| 4713 | if(G4UniformRand() < std::log(atomicWeight))
|
|---|
| 4714 | {
|
|---|
| 4715 | if (alekw > alem[0])
|
|---|
| 4716 | {
|
|---|
| 4717 | for (j = 1; j < 8; j++)
|
|---|
| 4718 | {
|
|---|
| 4719 | if(alekw < alem[j]) break;
|
|---|
| 4720 | }
|
|---|
| 4721 | xxh = (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alekw
|
|---|
| 4722 | + val0[j-1] - (val0[j]-val0[j-1])/(alem[j]-alem[j-1])*alem[j-1];
|
|---|
| 4723 | xxh = 1. - xxh;
|
|---|
| 4724 | }
|
|---|
| 4725 | }
|
|---|
| 4726 | }
|
|---|
| 4727 | }
|
|---|
| 4728 | dekin += ekin*(1.-xxh);
|
|---|
| 4729 | ekin *= xxh;
|
|---|
| 4730 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 4731 | pvCode = pv[i].getCode();
|
|---|
| 4732 | if ((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 4733 | {
|
|---|
| 4734 | npions += 1;
|
|---|
| 4735 | ek1 += ekin;
|
|---|
| 4736 | }
|
|---|
| 4737 | }
|
|---|
| 4738 | }
|
|---|
| 4739 | if( (ek1 > 0.0) && (npions > 0) )
|
|---|
| 4740 | {
|
|---|
| 4741 | dekin = 1.+dekin/ek1;
|
|---|
| 4742 | for (i = 0; i < vecLen; i++)
|
|---|
| 4743 | {
|
|---|
| 4744 | pvCode = pv[i].getCode();
|
|---|
| 4745 | if((pvCode == pionPlusCode) || (pvCode == pionMinusCode) || (pvCode == pionZeroCode))
|
|---|
| 4746 | {
|
|---|
| 4747 | ekin = Amax( 1.0e-6, pv[i].getKineticEnergy() * dekin );
|
|---|
| 4748 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 4749 | }
|
|---|
| 4750 | }
|
|---|
| 4751 | }
|
|---|
| 4752 | if (verboseLevel > 1)
|
|---|
| 4753 | { G4cout << " Lab-System " << ek1 << " " << npions << G4endl;
|
|---|
| 4754 | for (i=0; i<vecLen; i++) pv[i].Print(i);
|
|---|
| 4755 | }
|
|---|
| 4756 |
|
|---|
| 4757 | // Add black track particles
|
|---|
| 4758 | // The total number of particles produced is restricted to 198
|
|---|
| 4759 | // this may have influence on very high energies
|
|---|
| 4760 |
|
|---|
| 4761 | if (verboseLevel > 1)
|
|---|
| 4762 | G4cout << " Evaporation " << atomicWeight << " "
|
|---|
| 4763 | << excitationEnergyGNP << " " << excitationEnergyDTA << G4endl;
|
|---|
| 4764 |
|
|---|
| 4765 | if( atomicWeight > 1.5 )
|
|---|
| 4766 | {
|
|---|
| 4767 |
|
|---|
| 4768 | G4double sprob, cost, sint, ekin2, ran, pp, eka;
|
|---|
| 4769 | G4int spall(0), nbl(0);
|
|---|
| 4770 | // sprob is the probability of self-absorption in heavy molecules
|
|---|
| 4771 |
|
|---|
| 4772 | if( incidentKineticEnergy < 5.0 )
|
|---|
| 4773 | sprob = 0.0;
|
|---|
| 4774 | else
|
|---|
| 4775 | // sprob = Amin( 1.0, 0.6*std::log(incidentKineticEnergy-4.0) );
|
|---|
| 4776 | sprob = Amin(1., 0.000314*atomicWeight*std::log(incidentKineticEnergy-4.));
|
|---|
| 4777 | // First add protons and neutrons
|
|---|
| 4778 |
|
|---|
| 4779 | if( excitationEnergyGNP >= 0.001 )
|
|---|
| 4780 | {
|
|---|
| 4781 | // nbl = number of proton/neutron black track particles
|
|---|
| 4782 | // tex is their total kinetic energy (GeV)
|
|---|
| 4783 |
|
|---|
| 4784 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyGNP/
|
|---|
| 4785 | (excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 4786 | if( targ+nbl > atomicWeight ) nbl = (int)(atomicWeight - targ);
|
|---|
| 4787 | if (verboseLevel > 1)
|
|---|
| 4788 | G4cout << " evaporation " << targ << " " << nbl << " "
|
|---|
| 4789 | << sprob << G4endl;
|
|---|
| 4790 | spall = targ;
|
|---|
| 4791 | if( nbl > 0)
|
|---|
| 4792 | {
|
|---|
| 4793 | ekin = excitationEnergyGNP/nbl;
|
|---|
| 4794 | ekin2 = 0.0;
|
|---|
| 4795 | for( i=0; i<nbl; i++ )
|
|---|
| 4796 | {
|
|---|
| 4797 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 4798 | if( ekin2 > excitationEnergyGNP) break;
|
|---|
| 4799 | ran = G4UniformRand();
|
|---|
| 4800 | ekin1 = -ekin*std::log(ran) - cfa*(1.0+0.5*normal());
|
|---|
| 4801 | if (ekin1 < 0) ekin1 = -0.010*std::log(ran);
|
|---|
| 4802 | ekin2 += ekin1;
|
|---|
| 4803 | if( ekin2 > excitationEnergyGNP )
|
|---|
| 4804 | ekin1 = Amax( 1.0e-6, excitationEnergyGNP-(ekin2-ekin1) );
|
|---|
| 4805 | if( G4UniformRand() > (1.0-atomicNumber/(atomicWeight)))
|
|---|
| 4806 | pv[vecLen].setDefinition( "Proton");
|
|---|
| 4807 | else
|
|---|
| 4808 | pv[vecLen].setDefinition( "Neutron");
|
|---|
| 4809 | spall++;
|
|---|
| 4810 | cost = G4UniformRand() * 2.0 - 1.0;
|
|---|
| 4811 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 4812 | phi = twopi * G4UniformRand();
|
|---|
| 4813 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 4814 | pv[vecLen].setSide( -4 );
|
|---|
| 4815 | pvMass = pv[vecLen].getMass();
|
|---|
| 4816 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 4817 | pvEnergy = ekin1 + pvMass;
|
|---|
| 4818 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 4819 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 4820 | pp*sint*std::cos(phi),
|
|---|
| 4821 | pp*cost );
|
|---|
| 4822 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 4823 | vecLen++;
|
|---|
| 4824 | }
|
|---|
| 4825 | if( (atomicWeight >= 10.0 ) && (incidentKineticEnergy <= 2.0) )
|
|---|
| 4826 | {
|
|---|
| 4827 | G4int ika, kk = 0;
|
|---|
| 4828 | eka = incidentKineticEnergy;
|
|---|
| 4829 | if( eka > 1.0 )eka *= eka;
|
|---|
| 4830 | eka = Amax( 0.1, eka );
|
|---|
| 4831 | ika = G4int(3.6*std::exp((atomicNumber*atomicNumber
|
|---|
| 4832 | /atomicWeight-35.56)/6.45)/eka);
|
|---|
| 4833 | if( ika > 0 )
|
|---|
| 4834 | {
|
|---|
| 4835 | for( i=(vecLen-1); i>=0; i-- )
|
|---|
| 4836 | {
|
|---|
| 4837 | if( (pv[i].getCode() == protonCode) && pv[i].getFlag() )
|
|---|
| 4838 | {
|
|---|
| 4839 | G4HEVector pTemp = pv[i];
|
|---|
| 4840 | pv[i].setDefinition( "Neutron");
|
|---|
| 4841 | pv[i].setMomentumAndUpdate(pTemp.getMomentum());
|
|---|
| 4842 | if (verboseLevel > 1) pv[i].Print(i);
|
|---|
| 4843 | if( ++kk > ika ) break;
|
|---|
| 4844 | }
|
|---|
| 4845 | }
|
|---|
| 4846 | }
|
|---|
| 4847 | }
|
|---|
| 4848 | }
|
|---|
| 4849 | }
|
|---|
| 4850 |
|
|---|
| 4851 | // Finished adding proton/neutron black track particles
|
|---|
| 4852 | // now, try to add deuterons, tritons and alphas
|
|---|
| 4853 |
|
|---|
| 4854 | if( excitationEnergyDTA >= 0.001 )
|
|---|
| 4855 | {
|
|---|
| 4856 | nbl = Poisson( (1.5+1.25*targ)*excitationEnergyDTA
|
|---|
| 4857 | /(excitationEnergyGNP+excitationEnergyDTA));
|
|---|
| 4858 |
|
|---|
| 4859 | // nbl is the number of deutrons, tritons, and alphas produced
|
|---|
| 4860 |
|
|---|
| 4861 | if( nbl > 0 )
|
|---|
| 4862 | {
|
|---|
| 4863 | ekin = excitationEnergyDTA/nbl;
|
|---|
| 4864 | ekin2 = 0.0;
|
|---|
| 4865 | for( i=0; i<nbl; i++ )
|
|---|
| 4866 | {
|
|---|
| 4867 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 4868 | if( ekin2 > excitationEnergyDTA) break;
|
|---|
| 4869 | ran = G4UniformRand();
|
|---|
| 4870 | ekin1 = -ekin*std::log(ran)-cfa*(1.+0.5*normal());
|
|---|
| 4871 | if( ekin1 < 0.0 ) ekin1 = -0.010*std::log(ran);
|
|---|
| 4872 | ekin2 += ekin1;
|
|---|
| 4873 | if( ekin2 > excitationEnergyDTA)
|
|---|
| 4874 | ekin1 = Amax( 1.0e-6, excitationEnergyDTA-(ekin2-ekin1));
|
|---|
| 4875 | cost = G4UniformRand()*2.0 - 1.0;
|
|---|
| 4876 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 4877 | phi = twopi*G4UniformRand();
|
|---|
| 4878 | ran = G4UniformRand();
|
|---|
| 4879 | if( ran <= 0.60 )
|
|---|
| 4880 | pv[vecLen].setDefinition( "Deuteron");
|
|---|
| 4881 | else if (ran <= 0.90)
|
|---|
| 4882 | pv[vecLen].setDefinition( "Triton");
|
|---|
| 4883 | else
|
|---|
| 4884 | pv[vecLen].setDefinition( "Alpha");
|
|---|
| 4885 | spall += (int)(pv[vecLen].getMass() * 1.066);
|
|---|
| 4886 | if( spall > atomicWeight ) break;
|
|---|
| 4887 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 4888 | pv[vecLen].setSide( -4 );
|
|---|
| 4889 | pvMass = pv[vecLen].getMass();
|
|---|
| 4890 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 4891 | pvEnergy = pvMass + ekin1;
|
|---|
| 4892 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 4893 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 4894 | pp*sint*std::cos(phi),
|
|---|
| 4895 | pp*cost );
|
|---|
| 4896 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 4897 | vecLen++;
|
|---|
| 4898 | }
|
|---|
| 4899 | }
|
|---|
| 4900 | }
|
|---|
| 4901 | }
|
|---|
| 4902 | if( centerOfMassEnergy <= (4.0+G4UniformRand()) )
|
|---|
| 4903 | {
|
|---|
| 4904 | for( i=0; i<vecLen; i++ )
|
|---|
| 4905 | {
|
|---|
| 4906 | G4double etb = pv[i].getKineticEnergy();
|
|---|
| 4907 | if( etb >= incidentKineticEnergy )
|
|---|
| 4908 | pv[i].setKineticEnergyAndUpdate( incidentKineticEnergy );
|
|---|
| 4909 | }
|
|---|
| 4910 | }
|
|---|
| 4911 |
|
|---|
| 4912 | // Calculate time delay for nuclear reactions
|
|---|
| 4913 |
|
|---|
| 4914 | G4double tof = incidentTOF;
|
|---|
| 4915 | if( (atomicWeight >= 1.5) && (atomicWeight <= 230.0)
|
|---|
| 4916 | && (incidentKineticEnergy <= 0.2) )
|
|---|
| 4917 | tof -= 500.0 * std::exp(-incidentKineticEnergy /0.04) * std::log( G4UniformRand() );
|
|---|
| 4918 | for ( i=0; i < vecLen; i++)
|
|---|
| 4919 | {
|
|---|
| 4920 |
|
|---|
| 4921 | pv[i].setTOF ( tof );
|
|---|
| 4922 | // vec[i].SetTOF ( tof );
|
|---|
| 4923 | }
|
|---|
| 4924 |
|
|---|
| 4925 | for(i=0; i<vecLen; i++)
|
|---|
| 4926 | {
|
|---|
| 4927 | if(pv[i].getName() == "KaonZero" || pv[i].getName() == "AntiKaonZero")
|
|---|
| 4928 | {
|
|---|
| 4929 | pvmx[0] = pv[i];
|
|---|
| 4930 | if(G4UniformRand() < 0.5) pv[i].setDefinition("KaonZeroShort");
|
|---|
| 4931 | else pv[i].setDefinition("KaonZeroLong");
|
|---|
| 4932 | pv[i].setMomentumAndUpdate(pvmx[0].getMomentum());
|
|---|
| 4933 | }
|
|---|
| 4934 | }
|
|---|
| 4935 |
|
|---|
| 4936 | successful = true;
|
|---|
| 4937 | delete [] pvmx;
|
|---|
| 4938 | delete [] tempV;
|
|---|
| 4939 | return;
|
|---|
| 4940 | }
|
|---|
| 4941 |
|
|---|
| 4942 | void
|
|---|
| 4943 | G4HEInelastic::QuasiElasticScattering(G4bool &successful,
|
|---|
| 4944 | G4HEVector pv[],
|
|---|
| 4945 | G4int &vecLen,
|
|---|
| 4946 | G4double &excitationEnergyGNP,
|
|---|
| 4947 | G4double &excitationEnergyDTA,
|
|---|
| 4948 | G4HEVector incidentParticle,
|
|---|
| 4949 | G4HEVector targetParticle,
|
|---|
| 4950 | G4double atomicWeight,
|
|---|
| 4951 | G4double atomicNumber )
|
|---|
| 4952 | {
|
|---|
| 4953 | // if the Cascading or Resonance - model fails, we try this,
|
|---|
| 4954 | // QuasiElasticScattering.
|
|---|
| 4955 | //
|
|---|
| 4956 | // All quantities on the G4HEVector Array pv are in GeV- units.
|
|---|
| 4957 |
|
|---|
| 4958 | G4int protonCode = Proton.getCode();
|
|---|
| 4959 | G4String mesonType = PionPlus.getType();
|
|---|
| 4960 | G4String baryonType = Proton.getType();
|
|---|
| 4961 | G4String antiBaryonType= AntiProton.getType();
|
|---|
| 4962 |
|
|---|
| 4963 | G4double targetMass = targetParticle.getMass();
|
|---|
| 4964 |
|
|---|
| 4965 | G4double incidentMass = incidentParticle.getMass();
|
|---|
| 4966 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 4967 | G4double incidentEnergy = incidentParticle.getEnergy();
|
|---|
| 4968 | G4double incidentKineticEnergy = incidentParticle.getKineticEnergy();
|
|---|
| 4969 | G4String incidentType = incidentParticle.getType();
|
|---|
| 4970 | // G4double incidentTOF = incidentParticle.getTOF();
|
|---|
| 4971 | G4double incidentTOF = 0.;
|
|---|
| 4972 |
|
|---|
| 4973 | // some local variables
|
|---|
| 4974 |
|
|---|
| 4975 | G4int i;
|
|---|
| 4976 |
|
|---|
| 4977 | if(verboseLevel > 1)
|
|---|
| 4978 | G4cout << " G4HEInelastic::QuasiElasticScattering " << G4endl;
|
|---|
| 4979 |
|
|---|
| 4980 | if (incidentTotalMomentum < 0.01 || vecLen < 2 )
|
|---|
| 4981 | {
|
|---|
| 4982 | successful = false;
|
|---|
| 4983 | return;
|
|---|
| 4984 | }
|
|---|
| 4985 | G4double centerOfMassEnergy = std::sqrt( sqr(incidentMass) + sqr(targetMass)
|
|---|
| 4986 | +2.*targetMass*incidentEnergy);
|
|---|
| 4987 |
|
|---|
| 4988 | G4HEVector pvI = incidentParticle; // for the incident particle
|
|---|
| 4989 | pvI.setSide( 1 );
|
|---|
| 4990 |
|
|---|
| 4991 | G4HEVector pvT = targetParticle; // for the target particle
|
|---|
| 4992 | pvT.setMomentumAndUpdate( 0.0, 0.0, 0.0 );
|
|---|
| 4993 | pvT.setSide( -1 );
|
|---|
| 4994 | pvT.setTOF( -1.);
|
|---|
| 4995 |
|
|---|
| 4996 | G4HEVector* pvmx = new G4HEVector[3];
|
|---|
| 4997 |
|
|---|
| 4998 | if (atomicWeight > 1.5) // for the following case better use ElasticScattering.
|
|---|
| 4999 | {
|
|---|
| 5000 | if ( (pvI.getCode() == pv[0].getCode() )
|
|---|
| 5001 | && (pvT.getCode() == pv[1].getCode() )
|
|---|
| 5002 | && (excitationEnergyGNP < 0.001)
|
|---|
| 5003 | && (excitationEnergyDTA < 0.001) )
|
|---|
| 5004 | {
|
|---|
| 5005 | successful = false;
|
|---|
| 5006 | return;
|
|---|
| 5007 | }
|
|---|
| 5008 | }
|
|---|
| 5009 |
|
|---|
| 5010 | pv[0].setSide( 1 );
|
|---|
| 5011 | pv[0].setFlag( false );
|
|---|
| 5012 | pv[0].setTOF( incidentTOF);
|
|---|
| 5013 | pv[0].setMomentumAndUpdate( incidentParticle.getMomentum() );
|
|---|
| 5014 | pv[1].setSide( -1 );
|
|---|
| 5015 | pv[1].setFlag( false );
|
|---|
| 5016 | pv[1].setTOF( incidentTOF);
|
|---|
| 5017 | pv[1].setMomentumAndUpdate(targetParticle.getMomentum() );
|
|---|
| 5018 |
|
|---|
| 5019 | if ( (incidentTotalMomentum > 0.1) && (centerOfMassEnergy > 0.01) )
|
|---|
| 5020 | {
|
|---|
| 5021 | if ( pv[1].getType() == mesonType )
|
|---|
| 5022 | {
|
|---|
| 5023 | if (G4UniformRand() < 0.5)
|
|---|
| 5024 | pv[1].setDefinition( "Proton");
|
|---|
| 5025 | else
|
|---|
| 5026 | pv[1].setDefinition( "Neutron");
|
|---|
| 5027 | }
|
|---|
| 5028 | pvmx[0].Add( pvI, pvT );
|
|---|
| 5029 | pvmx[1].Lor( pvI, pvmx[0] );
|
|---|
| 5030 | pvmx[2].Lor( pvT, pvmx[0] );
|
|---|
| 5031 | G4double pin = pvmx[1].Length();
|
|---|
| 5032 | G4double bvalue = Amax(0.01 , 4.225+1.795*std::log(incidentTotalMomentum));
|
|---|
| 5033 | G4double pf = sqr( sqr(centerOfMassEnergy) + sqr(pv[1].getMass()) - sqr(pv[0].getMass()))
|
|---|
| 5034 | - 4 * sqr(centerOfMassEnergy) * sqr(pv[1].getMass());
|
|---|
| 5035 | if ( pf < 0.001)
|
|---|
| 5036 | {
|
|---|
| 5037 | successful = false;
|
|---|
| 5038 | return;
|
|---|
| 5039 | }
|
|---|
| 5040 | pf = std::sqrt(pf)/(2.*centerOfMassEnergy);
|
|---|
| 5041 | G4double btrang = 4. * bvalue * pin * pf;
|
|---|
| 5042 | G4double exindt = -1.;
|
|---|
| 5043 | if (btrang < 46.) exindt += std::exp(-btrang);
|
|---|
| 5044 | G4double tdn = std::log(1. + G4UniformRand()*exindt)/btrang;
|
|---|
| 5045 | G4double ctet = Amax( -1., Amin(1., 1. + 2.*tdn));
|
|---|
| 5046 | G4double stet = std::sqrt((1.-ctet)*(1.+ctet));
|
|---|
| 5047 | G4double phi = twopi * G4UniformRand();
|
|---|
| 5048 | pv[0].setMomentumAndUpdate( pf*stet*std::sin(phi),
|
|---|
| 5049 | pf*stet*std::cos(phi),
|
|---|
| 5050 | pf*ctet );
|
|---|
| 5051 | pv[1].SmulAndUpdate( pv[0], -1.);
|
|---|
| 5052 |
|
|---|
| 5053 | for (i = 0; i < 2; i++)
|
|---|
| 5054 | {
|
|---|
| 5055 | pv[i].Lor( pv[i], pvmx[4] );
|
|---|
| 5056 | pv[i].Defs1( pv[i], pvI );
|
|---|
| 5057 | if (atomicWeight > 1.5)
|
|---|
| 5058 | {
|
|---|
| 5059 | G4double ekin = pv[i].getKineticEnergy()
|
|---|
| 5060 | - 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.)
|
|---|
| 5061 | *(1. + 0.5*normal());
|
|---|
| 5062 | ekin = Amax(0.0001, ekin);
|
|---|
| 5063 | pv[i].setKineticEnergyAndUpdate( ekin );
|
|---|
| 5064 | }
|
|---|
| 5065 | }
|
|---|
| 5066 | }
|
|---|
| 5067 | vecLen = 2;
|
|---|
| 5068 |
|
|---|
| 5069 | // add black track particles
|
|---|
| 5070 | // the total number of particles produced is restricted to 198
|
|---|
| 5071 | // this may have influence on very high energies
|
|---|
| 5072 |
|
|---|
| 5073 | if (verboseLevel > 1)
|
|---|
| 5074 | G4cout << " Evaporation " << atomicWeight << " " <<
|
|---|
| 5075 | excitationEnergyGNP << " " << excitationEnergyDTA << G4endl;
|
|---|
| 5076 |
|
|---|
| 5077 | if( atomicWeight > 1.5 )
|
|---|
| 5078 | {
|
|---|
| 5079 |
|
|---|
| 5080 | G4double sprob, cost, sint, ekin2, ran, pp, eka;
|
|---|
| 5081 | G4double ekin, cfa, ekin1, phi, pvMass, pvEnergy;
|
|---|
| 5082 | G4int spall(0), nbl(0);
|
|---|
| 5083 | // sprob is the probability of self-absorption in heavy molecules
|
|---|
| 5084 |
|
|---|
| 5085 | sprob = 0.;
|
|---|
| 5086 | cfa = 0.025*((atomicWeight-1.)/120.)*std::exp(-(atomicWeight-1.)/120.);
|
|---|
| 5087 | // first add protons and neutrons
|
|---|
| 5088 |
|
|---|
| 5089 | if( excitationEnergyGNP >= 0.001 )
|
|---|
| 5090 | {
|
|---|
| 5091 | // nbl = number of proton/neutron black track particles
|
|---|
| 5092 | // tex is their total kinetic energy (GeV)
|
|---|
| 5093 |
|
|---|
| 5094 | nbl = Poisson( excitationEnergyGNP/0.02);
|
|---|
| 5095 | if( nbl > atomicWeight ) nbl = (int)(atomicWeight);
|
|---|
| 5096 | if (verboseLevel > 1)
|
|---|
| 5097 | G4cout << " evaporation " << nbl << " " << sprob << G4endl;
|
|---|
| 5098 | spall = 0;
|
|---|
| 5099 | if( nbl > 0)
|
|---|
| 5100 | {
|
|---|
| 5101 | ekin = excitationEnergyGNP/nbl;
|
|---|
| 5102 | ekin2 = 0.0;
|
|---|
| 5103 | for( i=0; i<nbl; i++ )
|
|---|
| 5104 | {
|
|---|
| 5105 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 5106 | if( ekin2 > excitationEnergyGNP) break;
|
|---|
| 5107 | ran = G4UniformRand();
|
|---|
| 5108 | ekin1 = -ekin*std::log(ran) - cfa*(1.0+0.5*normal());
|
|---|
| 5109 | if (ekin1 < 0) ekin1 = -0.010*std::log(ran);
|
|---|
| 5110 | ekin2 += ekin1;
|
|---|
| 5111 | if( ekin2 > excitationEnergyGNP)
|
|---|
| 5112 | ekin1 = Amax( 1.0e-6, excitationEnergyGNP-(ekin2-ekin1) );
|
|---|
| 5113 | if( G4UniformRand() > (1.0-atomicNumber/(atomicWeight)))
|
|---|
| 5114 | pv[vecLen].setDefinition( "Proton");
|
|---|
| 5115 | else
|
|---|
| 5116 | pv[vecLen].setDefinition( "Neutron");
|
|---|
| 5117 | spall++;
|
|---|
| 5118 | cost = G4UniformRand() * 2.0 - 1.0;
|
|---|
| 5119 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 5120 | phi = twopi * G4UniformRand();
|
|---|
| 5121 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 5122 | pv[vecLen].setSide( -4 );
|
|---|
| 5123 | pvMass = pv[vecLen].getMass();
|
|---|
| 5124 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 5125 | pvEnergy = ekin1 + pvMass;
|
|---|
| 5126 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 5127 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 5128 | pp*sint*std::cos(phi),
|
|---|
| 5129 | pp*cost );
|
|---|
| 5130 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 5131 | vecLen++;
|
|---|
| 5132 | }
|
|---|
| 5133 | if( (atomicWeight >= 10.0 ) && (incidentKineticEnergy <= 2.0) )
|
|---|
| 5134 | {
|
|---|
| 5135 | G4int ika, kk = 0;
|
|---|
| 5136 | eka = incidentKineticEnergy;
|
|---|
| 5137 | if( eka > 1.0 )eka *= eka;
|
|---|
| 5138 | eka = Amax( 0.1, eka );
|
|---|
| 5139 | ika = G4int(3.6*std::exp((atomicNumber*atomicNumber
|
|---|
| 5140 | /atomicWeight-35.56)/6.45)/eka);
|
|---|
| 5141 | if( ika > 0 )
|
|---|
| 5142 | {
|
|---|
| 5143 | for( i=(vecLen-1); i>=0; i-- )
|
|---|
| 5144 | {
|
|---|
| 5145 | if( (pv[i].getCode() == protonCode) && pv[i].getFlag() )
|
|---|
| 5146 | {
|
|---|
| 5147 | pv[i].setDefinition( "Neutron" );
|
|---|
| 5148 | if (verboseLevel > 1) pv[i].Print(i);
|
|---|
| 5149 | if( ++kk > ika ) break;
|
|---|
| 5150 | }
|
|---|
| 5151 | }
|
|---|
| 5152 | }
|
|---|
| 5153 | }
|
|---|
| 5154 | }
|
|---|
| 5155 | }
|
|---|
| 5156 |
|
|---|
| 5157 | // finished adding proton/neutron black track particles
|
|---|
| 5158 | // now, try to add deuterons, tritons and alphas
|
|---|
| 5159 |
|
|---|
| 5160 | if( excitationEnergyDTA >= 0.001 )
|
|---|
| 5161 | {
|
|---|
| 5162 | nbl = (G4int)(2.*std::log(atomicWeight));
|
|---|
| 5163 |
|
|---|
| 5164 | // nbl is the number of deutrons, tritons, and alphas produced
|
|---|
| 5165 |
|
|---|
| 5166 | if( nbl > 0 )
|
|---|
| 5167 | {
|
|---|
| 5168 | ekin = excitationEnergyDTA/nbl;
|
|---|
| 5169 | ekin2 = 0.0;
|
|---|
| 5170 | for( i=0; i<nbl; i++ )
|
|---|
| 5171 | {
|
|---|
| 5172 | if( G4UniformRand() < sprob ) continue;
|
|---|
| 5173 | if( ekin2 > excitationEnergyDTA) break;
|
|---|
| 5174 | ran = G4UniformRand();
|
|---|
| 5175 | ekin1 = -ekin*std::log(ran)-cfa*(1.+0.5*normal());
|
|---|
| 5176 | if( ekin1 < 0.0 ) ekin1 = -0.010*std::log(ran);
|
|---|
| 5177 | ekin2 += ekin1;
|
|---|
| 5178 | if( ekin2 > excitationEnergyDTA)
|
|---|
| 5179 | ekin1 = Amax( 1.0e-6, excitationEnergyDTA-(ekin2-ekin1));
|
|---|
| 5180 | cost = G4UniformRand()*2.0 - 1.0;
|
|---|
| 5181 | sint = std::sqrt(std::fabs(1.0-cost*cost));
|
|---|
| 5182 | phi = twopi*G4UniformRand();
|
|---|
| 5183 | ran = G4UniformRand();
|
|---|
| 5184 | if( ran <= 0.60 )
|
|---|
| 5185 | pv[vecLen].setDefinition( "Deuteron");
|
|---|
| 5186 | else if (ran <= 0.90)
|
|---|
| 5187 | pv[vecLen].setDefinition( "Triton");
|
|---|
| 5188 | else
|
|---|
| 5189 | pv[vecLen].setDefinition( "Alpha");
|
|---|
| 5190 | spall += (int)(pv[vecLen].getMass() * 1.066);
|
|---|
| 5191 | if( spall > atomicWeight ) break;
|
|---|
| 5192 | pv[vecLen].setFlag( true ); // true is the same as IPA(i)<0
|
|---|
| 5193 | pv[vecLen].setSide( -4 );
|
|---|
| 5194 | pvMass = pv[vecLen].getMass();
|
|---|
| 5195 | pv[vecLen].setTOF( 1.0 );
|
|---|
| 5196 | pvEnergy = pvMass + ekin1;
|
|---|
| 5197 | pp = std::sqrt( std::fabs( pvEnergy*pvEnergy - pvMass*pvMass ) );
|
|---|
| 5198 | pv[vecLen].setMomentumAndUpdate( pp*sint*std::sin(phi),
|
|---|
| 5199 | pp*sint*std::cos(phi),
|
|---|
| 5200 | pp*cost );
|
|---|
| 5201 | if (verboseLevel > 1) pv[vecLen].Print(vecLen);
|
|---|
| 5202 | vecLen++;
|
|---|
| 5203 | }
|
|---|
| 5204 | }
|
|---|
| 5205 | }
|
|---|
| 5206 | }
|
|---|
| 5207 |
|
|---|
| 5208 | // Calculate time delay for nuclear reactions
|
|---|
| 5209 |
|
|---|
| 5210 | G4double tof = incidentTOF;
|
|---|
| 5211 | if( (atomicWeight >= 1.5) && (atomicWeight <= 230.0)
|
|---|
| 5212 | && (incidentKineticEnergy <= 0.2) )
|
|---|
| 5213 | tof -= 500.0 * std::exp(-incidentKineticEnergy /0.04) * std::log( G4UniformRand() );
|
|---|
| 5214 | for ( i=0; i < vecLen; i++)
|
|---|
| 5215 | {
|
|---|
| 5216 |
|
|---|
| 5217 | pv[i].setTOF ( tof );
|
|---|
| 5218 | // vec[i].SetTOF ( tof );
|
|---|
| 5219 | }
|
|---|
| 5220 |
|
|---|
| 5221 | for(i=0; i<vecLen; i++)
|
|---|
| 5222 | {
|
|---|
| 5223 | if(pv[i].getName() == "KaonZero" || pv[i].getName() == "AntiKaonZero")
|
|---|
| 5224 | {
|
|---|
| 5225 | pvmx[0] = pv[i];
|
|---|
| 5226 | if(G4UniformRand() < 0.5) pv[i].setDefinition("KaonZeroShort");
|
|---|
| 5227 | else pv[i].setDefinition("KaonZeroLong");
|
|---|
| 5228 | pv[i].setMomentumAndUpdate(pvmx[0].getMomentum());
|
|---|
| 5229 | }
|
|---|
| 5230 | }
|
|---|
| 5231 |
|
|---|
| 5232 | successful = true;
|
|---|
| 5233 | delete [] pvmx;
|
|---|
| 5234 | return;
|
|---|
| 5235 | }
|
|---|
| 5236 |
|
|---|
| 5237 | void
|
|---|
| 5238 | G4HEInelastic::ElasticScattering(G4bool &successful,
|
|---|
| 5239 | G4HEVector pv[],
|
|---|
| 5240 | G4int &vecLen,
|
|---|
| 5241 | G4HEVector incidentParticle,
|
|---|
| 5242 | G4double atomicWeight,
|
|---|
| 5243 | G4double /* atomicNumber*/)
|
|---|
| 5244 | {
|
|---|
| 5245 | if(verboseLevel > 1)
|
|---|
| 5246 | G4cout << " G4HEInelastic::ElasticScattering " << G4endl;
|
|---|
| 5247 |
|
|---|
| 5248 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum();
|
|---|
| 5249 | if (verboseLevel > 1)
|
|---|
| 5250 | G4cout << "DoIt: Incident particle momentum="
|
|---|
| 5251 | << incidentTotalMomentum << " GeV" << G4endl;
|
|---|
| 5252 | if (incidentTotalMomentum < 0.01)
|
|---|
| 5253 | {
|
|---|
| 5254 | successful = false;
|
|---|
| 5255 | return;
|
|---|
| 5256 | }
|
|---|
| 5257 | if (atomicWeight < 0.5)
|
|---|
| 5258 | {
|
|---|
| 5259 | successful = false;
|
|---|
| 5260 | return;
|
|---|
| 5261 | }
|
|---|
| 5262 | pv[0] = incidentParticle;
|
|---|
| 5263 | vecLen = 1;
|
|---|
| 5264 |
|
|---|
| 5265 | G4double aa, bb, cc, dd, rr;
|
|---|
| 5266 | if (atomicWeight <= 62.)
|
|---|
| 5267 | {
|
|---|
| 5268 | aa = std::pow(atomicWeight, 1.63);
|
|---|
| 5269 | bb = 14.5*std::pow(atomicWeight, 0.66);
|
|---|
| 5270 | cc = 1.4*std::pow(atomicWeight, 0.33);
|
|---|
| 5271 | dd = 10.;
|
|---|
| 5272 | }
|
|---|
| 5273 | else
|
|---|
| 5274 | {
|
|---|
| 5275 | aa = std::pow(atomicWeight, 1.33);
|
|---|
| 5276 | bb = 60.*std::pow(atomicWeight, 0.33);
|
|---|
| 5277 | cc = 0.4*std::pow(atomicWeight, 0.40);
|
|---|
| 5278 | dd = 10.;
|
|---|
| 5279 | }
|
|---|
| 5280 | aa = aa/bb;
|
|---|
| 5281 | cc = cc/dd;
|
|---|
| 5282 | G4double ran = G4UniformRand();
|
|---|
| 5283 | rr = (aa + cc)*ran;
|
|---|
| 5284 | if (verboseLevel > 1)
|
|---|
| 5285 | {
|
|---|
| 5286 | G4cout << "ElasticScattering: aa,bb,cc,dd,rr" << G4endl;
|
|---|
| 5287 | G4cout << aa << " " << bb << " " << cc << " " << dd << " "
|
|---|
| 5288 | << rr << G4endl;
|
|---|
| 5289 | }
|
|---|
| 5290 | G4double t1 = -std::log(ran)/bb;
|
|---|
| 5291 | G4double t2 = -std::log(ran)/dd;
|
|---|
| 5292 | if (verboseLevel > 1) {
|
|---|
| 5293 | G4cout << "t1,fctcos " << t1 << " " << fctcos(t1, aa, bb, cc, dd, rr)
|
|---|
| 5294 | << G4endl;
|
|---|
| 5295 | G4cout << "t2,fctcos " << t2 << " " << fctcos(t2, aa, bb, cc, dd, rr)
|
|---|
| 5296 | << G4endl;
|
|---|
| 5297 | }
|
|---|
| 5298 | G4double eps = 0.001;
|
|---|
| 5299 | G4int ind1 = 10;
|
|---|
| 5300 | G4double t;
|
|---|
| 5301 | G4int ier1;
|
|---|
| 5302 | ier1 = rtmi(&t, t1, t2, eps, ind1, aa, bb, cc, dd, rr);
|
|---|
| 5303 | if (verboseLevel > 1) {
|
|---|
| 5304 | G4cout << "From rtmi, ier1=" << ier1 << G4endl;
|
|---|
| 5305 | G4cout << "t, fctcos " << t << " " << fctcos(t, aa, bb, cc, dd, rr)
|
|---|
| 5306 | << G4endl;
|
|---|
| 5307 | }
|
|---|
| 5308 | if (ier1 != 0) t = 0.25*(3.*t1 + t2);
|
|---|
| 5309 | if (verboseLevel > 1)
|
|---|
| 5310 | G4cout << "t, fctcos " << t << " " << fctcos(t, aa, bb, cc, dd, rr)
|
|---|
| 5311 | << G4endl;
|
|---|
| 5312 |
|
|---|
| 5313 | G4double phi = G4UniformRand()*twopi;
|
|---|
| 5314 | rr = 0.5*t/sqr(incidentTotalMomentum);
|
|---|
| 5315 | if (rr > 1.) rr = 0.;
|
|---|
| 5316 | if (verboseLevel > 1)
|
|---|
| 5317 | G4cout << "rr=" << rr << G4endl;
|
|---|
| 5318 | G4double cost = 1. - rr;
|
|---|
| 5319 | G4double sint = std::sqrt(Amax(rr*(2. - rr), 0.));
|
|---|
| 5320 | if (verboseLevel > 1)
|
|---|
| 5321 | G4cout << "cos(t)=" << cost << " std::sin(t)=" << sint << G4endl;
|
|---|
| 5322 | // Scattered particle referred to axis of incident particle
|
|---|
| 5323 | G4HEVector pv0;
|
|---|
| 5324 | G4HEVector pvI;
|
|---|
| 5325 | pvI.setMass( incidentParticle.getMass() );
|
|---|
| 5326 | pvI.setMomentum( incidentParticle.getMomentum() );
|
|---|
| 5327 | pvI.SmulAndUpdate( pvI, 1. );
|
|---|
| 5328 | pv0.setMass( pvI.getMass() );
|
|---|
| 5329 |
|
|---|
| 5330 | pv0.setMomentumAndUpdate( incidentTotalMomentum * sint * std::sin(phi),
|
|---|
| 5331 | incidentTotalMomentum * sint * std::cos(phi),
|
|---|
| 5332 | incidentTotalMomentum * cost );
|
|---|
| 5333 | pv0.Defs1( pv0, pvI );
|
|---|
| 5334 |
|
|---|
| 5335 | successful = true;
|
|---|
| 5336 | return;
|
|---|
| 5337 | }
|
|---|
| 5338 |
|
|---|
| 5339 |
|
|---|
| 5340 | G4int
|
|---|
| 5341 | G4HEInelastic::rtmi(G4double *x, G4double xli, G4double xri, G4double eps,
|
|---|
| 5342 | G4int iend,
|
|---|
| 5343 | G4double aa, G4double bb, G4double cc, G4double dd,
|
|---|
| 5344 | G4double rr)
|
|---|
| 5345 | {
|
|---|
| 5346 | G4int ier = 0;
|
|---|
| 5347 | G4double xl = xli;
|
|---|
| 5348 | G4double xr = xri;
|
|---|
| 5349 | *x = xl;
|
|---|
| 5350 | G4double tol = *x;
|
|---|
| 5351 | G4double f = fctcos(tol, aa, bb, cc, dd, rr);
|
|---|
| 5352 | if (f == 0.) return ier;
|
|---|
| 5353 | G4double fl, fr;
|
|---|
| 5354 | fl = f;
|
|---|
| 5355 | *x = xr;
|
|---|
| 5356 | tol = *x;
|
|---|
| 5357 | f = fctcos(tol, aa, bb, cc, dd, rr);
|
|---|
| 5358 | if (f == 0.) return ier;
|
|---|
| 5359 | fr = f;
|
|---|
| 5360 |
|
|---|
| 5361 | // Error return in case of wrong input data
|
|---|
| 5362 | if (fl*fr >= 0.)
|
|---|
| 5363 | {
|
|---|
| 5364 | ier = 2;
|
|---|
| 5365 | return ier;
|
|---|
| 5366 | }
|
|---|
| 5367 |
|
|---|
| 5368 | // Basic assumption fl*fr less than 0 is satisfied.
|
|---|
| 5369 | // Generate tolerance for function values.
|
|---|
| 5370 | G4int i = 0;
|
|---|
| 5371 | G4double tolf = 100.*eps;
|
|---|
| 5372 |
|
|---|
| 5373 | // Start iteration loop
|
|---|
| 5374 |
|
|---|
| 5375 | label4: // <-------------
|
|---|
| 5376 | i++;
|
|---|
| 5377 |
|
|---|
| 5378 | // Start bisection loop
|
|---|
| 5379 |
|
|---|
| 5380 | for (G4int k = 1; k <= iend; k++)
|
|---|
| 5381 | {
|
|---|
| 5382 | *x = 0.5*(xl + xr);
|
|---|
| 5383 | tol = *x;
|
|---|
| 5384 | f = fctcos(tol, aa, bb, cc, dd, rr);
|
|---|
| 5385 | if (f == 0.) return 0;
|
|---|
| 5386 | if (f*fr < 0.)
|
|---|
| 5387 | { // Interchange xl and xr in order to get the
|
|---|
| 5388 | tol = xl; // same sign in f and fr
|
|---|
| 5389 | xl = xr;
|
|---|
| 5390 | xr = tol;
|
|---|
| 5391 | tol = fl;
|
|---|
| 5392 | fl = fr;
|
|---|
| 5393 | fr = tol;
|
|---|
| 5394 | }
|
|---|
| 5395 | tol = f - fl;
|
|---|
| 5396 | G4double a = f*tol;
|
|---|
| 5397 | a = a + a;
|
|---|
| 5398 | if (a < fr*(fr - fl) && i <= iend) goto label17;
|
|---|
| 5399 | xr = *x;
|
|---|
| 5400 | fr = f;
|
|---|
| 5401 |
|
|---|
| 5402 | // Test on satisfactory accuracy in bisection loop
|
|---|
| 5403 | tol = eps;
|
|---|
| 5404 | a = std::fabs(xr);
|
|---|
| 5405 | if (a > 1.) tol = tol*a;
|
|---|
| 5406 | if (std::fabs(xr - xl) <= tol && std::fabs(fr - fl) <= tolf) goto label14;
|
|---|
| 5407 | }
|
|---|
| 5408 | // End of bisection loop
|
|---|
| 5409 |
|
|---|
| 5410 | // No convergence after iend iteration steps followed by iend
|
|---|
| 5411 | // successive steps of bisection or steadily increasing function
|
|---|
| 5412 | // values at right bounds. Error return.
|
|---|
| 5413 | ier = 1;
|
|---|
| 5414 |
|
|---|
| 5415 | label14: // <---------------
|
|---|
| 5416 | if (std::fabs(fr) > std::fabs(fl))
|
|---|
| 5417 | {
|
|---|
| 5418 | *x = xl;
|
|---|
| 5419 | f = fl;
|
|---|
| 5420 | }
|
|---|
| 5421 | return ier;
|
|---|
| 5422 |
|
|---|
| 5423 | // Computation of iterated x-value by inverse parabolic interp
|
|---|
| 5424 | label17: // <---------------
|
|---|
| 5425 | G4double a = fr - f;
|
|---|
| 5426 | G4double dx = (*x - xl)*fl*(1. + f*(a - tol)/(a*(fr - fl)))/tol;
|
|---|
| 5427 | G4double xm = *x;
|
|---|
| 5428 | G4double fm = f;
|
|---|
| 5429 | *x = xl - dx;
|
|---|
| 5430 | tol = *x;
|
|---|
| 5431 | f = fctcos(tol, aa, bb, cc, dd, rr);
|
|---|
| 5432 | if (f == 0.) return ier;
|
|---|
| 5433 |
|
|---|
| 5434 | // Test on satisfactory accuracy in iteration loop
|
|---|
| 5435 | tol = eps;
|
|---|
| 5436 | a = std::fabs(*x);
|
|---|
| 5437 | if (a > 1) tol = tol*a;
|
|---|
| 5438 | if (std::fabs(dx) <= tol && std::fabs(f) <= tolf) return ier;
|
|---|
| 5439 |
|
|---|
| 5440 | // Preparation of next bisection loop
|
|---|
| 5441 | if (f*fl < 0.)
|
|---|
| 5442 | {
|
|---|
| 5443 | xr = *x;
|
|---|
| 5444 | fr = f;
|
|---|
| 5445 | }
|
|---|
| 5446 | else
|
|---|
| 5447 | {
|
|---|
| 5448 | xl = *x;
|
|---|
| 5449 | fl = f;
|
|---|
| 5450 | xr = xm;
|
|---|
| 5451 | fr = fm;
|
|---|
| 5452 | }
|
|---|
| 5453 | goto label4;
|
|---|
| 5454 | }
|
|---|
| 5455 |
|
|---|
| 5456 |
|
|---|
| 5457 | // Test function for root-finder
|
|---|
| 5458 |
|
|---|
| 5459 | G4double
|
|---|
| 5460 | G4HEInelastic::fctcos(G4double t, G4double aa, G4double bb, G4double cc,
|
|---|
| 5461 | G4double dd, G4double rr)
|
|---|
| 5462 | {
|
|---|
| 5463 | const G4double expxl = -82.;
|
|---|
| 5464 | const G4double expxu = 82.;
|
|---|
| 5465 |
|
|---|
| 5466 | G4double test1 = -bb*t;
|
|---|
| 5467 | if (test1 > expxu) test1 = expxu;
|
|---|
| 5468 | if (test1 < expxl) test1 = expxl;
|
|---|
| 5469 |
|
|---|
| 5470 | G4double test2 = -dd*t;
|
|---|
| 5471 | if (test2 > expxu) test2 = expxu;
|
|---|
| 5472 | if (test2 < expxl) test2 = expxl;
|
|---|
| 5473 |
|
|---|
| 5474 | return aa*std::exp(test1) + cc*std::exp(test2) - rr;
|
|---|
| 5475 | }
|
|---|
| 5476 |
|
|---|
| 5477 | G4double G4HEInelastic::NBodyPhaseSpace
|
|---|
| 5478 | ( const G4double totalEnergy, // MeV
|
|---|
| 5479 | const G4bool constantCrossSection,
|
|---|
| 5480 | G4HEVector vec[],
|
|---|
| 5481 | G4int& vecLen )
|
|---|
| 5482 | {
|
|---|
| 5483 | // derived from original FORTRAN code PHASP by H. Fesefeldt (02-Dec-1986)
|
|---|
| 5484 | // Returns the weight of the event
|
|---|
| 5485 |
|
|---|
| 5486 | G4int i;
|
|---|
| 5487 |
|
|---|
| 5488 | const G4double expxu = std::log(FLT_MAX); // upper bound for arg. of exp
|
|---|
| 5489 | const G4double expxl = -expxu; // lower bound for arg. of exp
|
|---|
| 5490 |
|
|---|
| 5491 | if( vecLen < 2 ) {
|
|---|
| 5492 | G4cerr << "*** Error in G4HEInelastic::GenerateNBodyEvent" << G4endl;
|
|---|
| 5493 | G4cerr << " number of particles < 2" << G4endl;
|
|---|
| 5494 | G4cerr << "totalEnergy = " << totalEnergy << ", vecLen = "
|
|---|
| 5495 | << vecLen << G4endl;
|
|---|
| 5496 | return -1.0;
|
|---|
| 5497 | }
|
|---|
| 5498 |
|
|---|
| 5499 | G4double* mass = new G4double [vecLen]; // mass of each particle
|
|---|
| 5500 | G4double* energy = new G4double [vecLen]; // total energy of each particle
|
|---|
| 5501 | G4double** pcm; // pcm is an array with 3 rows and vecLen columns
|
|---|
| 5502 | pcm = new G4double* [3];
|
|---|
| 5503 | for( i=0; i<3; ++i )pcm[i] = new G4double [vecLen];
|
|---|
| 5504 |
|
|---|
| 5505 | G4double totalMass = 0.0;
|
|---|
| 5506 | G4double* sm = new G4double [vecLen];
|
|---|
| 5507 |
|
|---|
| 5508 | for( i=0; i<vecLen; ++i ) {
|
|---|
| 5509 | mass[i] = vec[i].getMass();
|
|---|
| 5510 | vec[i].setMomentum( 0.0, 0.0, 0.0 );
|
|---|
| 5511 | pcm[0][i] = 0.0; // x-momentum of i-th particle
|
|---|
| 5512 | pcm[1][i] = 0.0; // y-momentum of i-th particle
|
|---|
| 5513 | pcm[2][i] = 0.0; // z-momentum of i-th particle
|
|---|
| 5514 | energy[i] = mass[i]; // total energy of i-th particle
|
|---|
| 5515 | totalMass += mass[i];
|
|---|
| 5516 | sm[i] = totalMass;
|
|---|
| 5517 | }
|
|---|
| 5518 |
|
|---|
| 5519 | if( totalMass >= totalEnergy ) {
|
|---|
| 5520 | if (verboseLevel > 1) {
|
|---|
| 5521 | G4cout << "*** Error in G4HEInelastic::GenerateNBodyEvent" << G4endl;
|
|---|
| 5522 | G4cout << " total mass (" << totalMass << ") >= total energy ("
|
|---|
| 5523 | << totalEnergy << ")" << G4endl;
|
|---|
| 5524 | }
|
|---|
| 5525 | delete [] mass;
|
|---|
| 5526 | delete [] energy;
|
|---|
| 5527 | for( i=0; i<3; ++i )delete [] pcm[i];
|
|---|
| 5528 | delete [] pcm;
|
|---|
| 5529 | delete [] sm;
|
|---|
| 5530 | return -1.0;
|
|---|
| 5531 | }
|
|---|
| 5532 |
|
|---|
| 5533 | G4double kineticEnergy = totalEnergy - totalMass;
|
|---|
| 5534 | G4double* emm = new G4double [vecLen];
|
|---|
| 5535 | emm[0] = mass[0];
|
|---|
| 5536 | if( vecLen > 3 ) { // the random numbers are sorted
|
|---|
| 5537 | G4double* ran = new G4double [vecLen];
|
|---|
| 5538 | for( i=0; i<vecLen; ++i )ran[i] = G4UniformRand();
|
|---|
| 5539 | for( i=0; i<vecLen-1; ++i ) {
|
|---|
| 5540 | for( G4int j=vecLen-1; j > i; --j ) {
|
|---|
| 5541 | if( ran[i] > ran[j] ) {
|
|---|
| 5542 | G4double temp = ran[i];
|
|---|
| 5543 | ran[i] = ran[j];
|
|---|
| 5544 | ran[j] = temp;
|
|---|
| 5545 | }
|
|---|
| 5546 | }
|
|---|
| 5547 | }
|
|---|
| 5548 | for( i=1; i<vecLen; ++i )emm[i] = ran[i-1]*kineticEnergy + sm[i];
|
|---|
| 5549 | delete [] ran;
|
|---|
| 5550 | } else {
|
|---|
| 5551 | emm[1] = G4UniformRand()*kineticEnergy + sm[1];
|
|---|
| 5552 | }
|
|---|
| 5553 | emm[vecLen-1] = totalEnergy;
|
|---|
| 5554 |
|
|---|
| 5555 | // Weight is the sum of logarithms of terms instead of the product of terms
|
|---|
| 5556 |
|
|---|
| 5557 | G4bool lzero = true;
|
|---|
| 5558 | G4double wtmax = 0.0;
|
|---|
| 5559 | if( constantCrossSection ) { // this is KGENEV=1 in PHASP
|
|---|
| 5560 | G4double emmax = kineticEnergy + mass[0];
|
|---|
| 5561 | G4double emmin = 0.0;
|
|---|
| 5562 | for( i=1; i<vecLen; ++i ) {
|
|---|
| 5563 | emmin += mass[i-1];
|
|---|
| 5564 | emmax += mass[i];
|
|---|
| 5565 | G4double wtfc = 0.0;
|
|---|
| 5566 | if( emmax*emmax > 0.0 ) {
|
|---|
| 5567 | G4double arg = emmax*emmax
|
|---|
| 5568 | + (emmin*emmin-mass[i]*mass[i])*(emmin*emmin-mass[i]*mass[i])/(emmax*emmax)
|
|---|
| 5569 | - 2.0*(emmin*emmin+mass[i]*mass[i]);
|
|---|
| 5570 | if( arg > 0.0 )wtfc = 0.5*std::sqrt( arg );
|
|---|
| 5571 | }
|
|---|
| 5572 | if( wtfc == 0.0 ) {
|
|---|
| 5573 | lzero = false;
|
|---|
| 5574 | break;
|
|---|
| 5575 | }
|
|---|
| 5576 | wtmax += std::log( wtfc );
|
|---|
| 5577 | }
|
|---|
| 5578 | if( lzero )
|
|---|
| 5579 | wtmax = -wtmax;
|
|---|
| 5580 | else
|
|---|
| 5581 | wtmax = expxu;
|
|---|
| 5582 | } else {
|
|---|
| 5583 | wtmax = std::log( std::pow( kineticEnergy, vecLen-2 ) *
|
|---|
| 5584 | pi * std::pow( twopi, vecLen-2 ) / Factorial(vecLen-2) );
|
|---|
| 5585 | }
|
|---|
| 5586 | lzero = true;
|
|---|
| 5587 | G4double* pd = new G4double [vecLen-1];
|
|---|
| 5588 | for( i=0; i<vecLen-1; ++i ) {
|
|---|
| 5589 | pd[i] = 0.0;
|
|---|
| 5590 | if( emm[i+1]*emm[i+1] > 0.0 ) {
|
|---|
| 5591 | G4double arg = emm[i+1]*emm[i+1]
|
|---|
| 5592 | + (emm[i]*emm[i]-mass[i+1]*mass[i+1])*(emm[i]*emm[i]-mass[i+1]*mass[i+1])
|
|---|
| 5593 | /(emm[i+1]*emm[i+1])
|
|---|
| 5594 | - 2.0*(emm[i]*emm[i]+mass[i+1]*mass[i+1]);
|
|---|
| 5595 | if( arg > 0.0 )pd[i] = 0.5*std::sqrt( arg );
|
|---|
| 5596 | }
|
|---|
| 5597 | if( pd[i] == 0.0 )
|
|---|
| 5598 | lzero = false;
|
|---|
| 5599 | else
|
|---|
| 5600 | wtmax += std::log( pd[i] );
|
|---|
| 5601 | }
|
|---|
| 5602 | G4double weight = 0.0; // weight is returned by GenerateNBodyEvent
|
|---|
| 5603 | if( lzero )weight = std::exp( Amax(Amin(wtmax,expxu),expxl) );
|
|---|
| 5604 |
|
|---|
| 5605 | G4double bang, cb, sb, s0, s1, s2, c, s, esys, a, b, gama, beta;
|
|---|
| 5606 | pcm[0][0] = 0.0;
|
|---|
| 5607 | pcm[1][0] = pd[0];
|
|---|
| 5608 | pcm[2][0] = 0.0;
|
|---|
| 5609 | for( i=1; i<vecLen; ++i ) {
|
|---|
| 5610 | pcm[0][i] = 0.0;
|
|---|
| 5611 | pcm[1][i] = -pd[i-1];
|
|---|
| 5612 | pcm[2][i] = 0.0;
|
|---|
| 5613 | bang = twopi*G4UniformRand();
|
|---|
| 5614 | cb = std::cos(bang);
|
|---|
| 5615 | sb = std::sin(bang);
|
|---|
| 5616 | c = 2.0*G4UniformRand() - 1.0;
|
|---|
| 5617 | s = std::sqrt( std::fabs( 1.0-c*c ) );
|
|---|
| 5618 | if( i < vecLen-1 ) {
|
|---|
| 5619 | esys = std::sqrt(pd[i]*pd[i] + emm[i]*emm[i]);
|
|---|
| 5620 | beta = pd[i]/esys;
|
|---|
| 5621 | gama = esys/emm[i];
|
|---|
| 5622 | for( G4int j=0; j<=i; ++j ) {
|
|---|
| 5623 | s0 = pcm[0][j];
|
|---|
| 5624 | s1 = pcm[1][j];
|
|---|
| 5625 | s2 = pcm[2][j];
|
|---|
| 5626 | energy[j] = std::sqrt( s0*s0 + s1*s1 + s2*s2 + mass[j]*mass[j] );
|
|---|
| 5627 | a = s0*c - s1*s; // rotation
|
|---|
| 5628 | pcm[1][j] = s0*s + s1*c;
|
|---|
| 5629 | b = pcm[2][j];
|
|---|
| 5630 | pcm[0][j] = a*cb - b*sb;
|
|---|
| 5631 | pcm[2][j] = a*sb + b*cb;
|
|---|
| 5632 | pcm[1][j] = gama*(pcm[1][j] + beta*energy[j]);
|
|---|
| 5633 | }
|
|---|
| 5634 | } else {
|
|---|
| 5635 | for( G4int j=0; j<=i; ++j ) {
|
|---|
| 5636 | s0 = pcm[0][j];
|
|---|
| 5637 | s1 = pcm[1][j];
|
|---|
| 5638 | s2 = pcm[2][j];
|
|---|
| 5639 | energy[j] = std::sqrt( s0*s0 + s1*s1 + s2*s2 + mass[j]*mass[j] );
|
|---|
| 5640 | a = s0*c - s1*s; // rotation
|
|---|
| 5641 | pcm[1][j] = s0*s + s1*c;
|
|---|
| 5642 | b = pcm[2][j];
|
|---|
| 5643 | pcm[0][j] = a*cb - b*sb;
|
|---|
| 5644 | pcm[2][j] = a*sb + b*cb;
|
|---|
| 5645 | }
|
|---|
| 5646 | }
|
|---|
| 5647 | }
|
|---|
| 5648 | G4double pModule;
|
|---|
| 5649 | for( i=0; i<vecLen; ++i ) {
|
|---|
| 5650 | kineticEnergy = energy[i] - mass[i];
|
|---|
| 5651 | pModule = std::sqrt( sqr(kineticEnergy) + 2*kineticEnergy*mass[i] );
|
|---|
| 5652 | vec[i].setMomentum( pcm[0][i]/pModule,
|
|---|
| 5653 | pcm[1][i]/pModule,
|
|---|
| 5654 | pcm[2][i]/pModule );
|
|---|
| 5655 | vec[i].setKineticEnergyAndUpdate( kineticEnergy );
|
|---|
| 5656 | }
|
|---|
| 5657 | delete [] mass;
|
|---|
| 5658 | delete [] energy;
|
|---|
| 5659 | for( i=0; i<3; ++i )delete [] pcm[i];
|
|---|
| 5660 | delete [] pcm;
|
|---|
| 5661 | delete [] emm;
|
|---|
| 5662 | delete [] sm;
|
|---|
| 5663 | delete [] pd;
|
|---|
| 5664 | return weight;
|
|---|
| 5665 | }
|
|---|
| 5666 |
|
|---|
| 5667 | G4double
|
|---|
| 5668 | G4HEInelastic::gpdk( G4double a, G4double b, G4double c )
|
|---|
| 5669 | {
|
|---|
| 5670 | if( a == 0.0 )
|
|---|
| 5671 | {
|
|---|
| 5672 | return 0.0;
|
|---|
| 5673 | }
|
|---|
| 5674 | else
|
|---|
| 5675 | {
|
|---|
| 5676 | G4double arg = a*a+(b*b-c*c)*(b*b-c*c)/(a*a)-2.0*(b*b+c*c);
|
|---|
| 5677 | if( arg <= 0.0 )
|
|---|
| 5678 | {
|
|---|
| 5679 | return 0.0;
|
|---|
| 5680 | }
|
|---|
| 5681 | else
|
|---|
| 5682 | {
|
|---|
| 5683 | return 0.5*std::sqrt(std::fabs(arg));
|
|---|
| 5684 | }
|
|---|
| 5685 | }
|
|---|
| 5686 | }
|
|---|
| 5687 |
|
|---|
| 5688 |
|
|---|
| 5689 | G4double
|
|---|
| 5690 | G4HEInelastic::NBodyPhaseSpace(G4int npart, G4HEVector pv[],
|
|---|
| 5691 | G4double wmax, G4double wfcn,
|
|---|
| 5692 | G4int maxtrial, G4int ntrial)
|
|---|
| 5693 | { ntrial = 0;
|
|---|
| 5694 | G4double wps(0);
|
|---|
| 5695 | while ( ntrial < maxtrial)
|
|---|
| 5696 | { ntrial++;
|
|---|
| 5697 | G4int i, j;
|
|---|
| 5698 | G4int nrn = 3*(npart-2)-4;
|
|---|
| 5699 | G4double *ranarr = new G4double[nrn];
|
|---|
| 5700 | for (i=0;i<nrn;i++) ranarr[i]=G4UniformRand();
|
|---|
| 5701 | G4int nrnp = npart-4;
|
|---|
| 5702 | if(nrnp > 1) QuickSort( ranarr, 0 , nrnp-1 );
|
|---|
| 5703 | G4HEVector pvcms;
|
|---|
| 5704 | pvcms.Add(pv[0],pv[1]);
|
|---|
| 5705 | pvcms.Smul( pvcms, -1.);
|
|---|
| 5706 | G4double rm = 0.;
|
|---|
| 5707 | for (i=2;i<npart;i++) rm += pv[i].getMass();
|
|---|
| 5708 | G4double rm1 = pvcms.getMass() - rm;
|
|---|
| 5709 | rm -= pv[2].getMass();
|
|---|
| 5710 | wps = (npart-3)*std::pow(rm1/sqr(twopi), npart-4)/(4*pi*pvcms.getMass());
|
|---|
| 5711 | for (i=3; (i=npart-1);i++) wps /= i-2; // @@@@@@@@@@ bug @@@@@@@@@
|
|---|
| 5712 | G4double xxx = rm1/sqr(twopi);
|
|---|
| 5713 | for (i=1; (i=npart-4); i++) wps /= xxx/i; // @@@@@@@@@@ bug @@@@@@@@@
|
|---|
| 5714 | wps /= (4*pi*pvcms.getMass());
|
|---|
| 5715 | G4double p2,cost,sint,phi;
|
|---|
| 5716 | j = 1;
|
|---|
| 5717 | while (j)
|
|---|
| 5718 | { j++;
|
|---|
| 5719 | rm -= pv[j+1].getMass();
|
|---|
| 5720 | if(j == npart-2) break;
|
|---|
| 5721 | G4double rmass = rm + rm1*ranarr[npart-j-1];
|
|---|
| 5722 | p2 = Alam(sqr(pvcms.getMass()), sqr(pv[j].getMass()),
|
|---|
| 5723 | sqr(rmass))/(4.*sqr(pvcms.getMass()));
|
|---|
| 5724 | cost = 1. - 2.*ranarr[npart+2*j-9];
|
|---|
| 5725 | sint = std::sqrt(1.-cost*cost);
|
|---|
| 5726 | phi = twopi*ranarr[npart+2*j-8];
|
|---|
| 5727 | p2 = std::sqrt( Amax(0., p2));
|
|---|
| 5728 | wps *= p2;
|
|---|
| 5729 | pv[j].setMomentumAndUpdate( p2*sint*std::sin(phi), p2*sint*std::cos(phi),p2*cost);
|
|---|
| 5730 | pv[j].Lor(pv[j], pvcms);
|
|---|
| 5731 | pvcms.Add3( pvcms, pv[j] );
|
|---|
| 5732 | pvcms.setEnergy(pvcms.getEnergy()-pv[j].getEnergy());
|
|---|
| 5733 | pvcms.setMass( std::sqrt(sqr(pvcms.getEnergy()) - sqr(pvcms.Length())));
|
|---|
| 5734 | }
|
|---|
| 5735 | p2 = Alam(sqr(pvcms.getMass()), sqr(pv[j].getMass()),
|
|---|
| 5736 | sqr(rm))/(4.*sqr(pvcms.getMass()));
|
|---|
| 5737 | cost = 1. - 2.*ranarr[npart+2*j-9];
|
|---|
| 5738 | sint = std::sqrt(1.-cost*cost);
|
|---|
| 5739 | phi = twopi*ranarr[npart+2*j-8];
|
|---|
| 5740 | p2 = std::sqrt( Amax(0. , p2));
|
|---|
| 5741 | wps *= p2;
|
|---|
| 5742 | pv[j].setMomentumAndUpdate( p2*sint*std::sin(phi), p2*sint*std::cos(phi), p2*cost);
|
|---|
| 5743 | pv[j+1].setMomentumAndUpdate( -p2*sint*std::sin(phi), -p2*sint*std::cos(phi), -p2*cost);
|
|---|
| 5744 | pv[j].Lor( pv[j], pvcms );
|
|---|
| 5745 | pv[j+1].Lor( pv[j+1], pvcms );
|
|---|
| 5746 | wfcn = CalculatePhaseSpaceWeight( npart );
|
|---|
| 5747 | G4double wt = wps * wfcn;
|
|---|
| 5748 | if (wt > wmax)
|
|---|
| 5749 | { wmax = wt;
|
|---|
| 5750 | G4cout << "maximum weight changed to " << wmax << G4endl;
|
|---|
| 5751 | }
|
|---|
| 5752 | wt = wt/wmax;
|
|---|
| 5753 | if (G4UniformRand() < wt) break;
|
|---|
| 5754 | }
|
|---|
| 5755 | return wps;
|
|---|
| 5756 | }
|
|---|
| 5757 |
|
|---|
| 5758 |
|
|---|
| 5759 | void
|
|---|
| 5760 | G4HEInelastic::QuickSort(G4double arr[], const G4int lidx, const G4int ridx)
|
|---|
| 5761 | { // sorts the Array arr[] in ascending order
|
|---|
| 5762 | G4double buffer;
|
|---|
| 5763 | G4int k, e, mid;
|
|---|
| 5764 | if(lidx>=ridx) return;
|
|---|
| 5765 | mid = (int)((lidx+ridx)/2.);
|
|---|
| 5766 | buffer = arr[lidx];
|
|---|
| 5767 | arr[lidx]= arr[mid];
|
|---|
| 5768 | arr[mid] = buffer;
|
|---|
| 5769 | e = lidx;
|
|---|
| 5770 | for (k=lidx+1;k<=ridx;k++)
|
|---|
| 5771 | if (arr[k] < arr[lidx])
|
|---|
| 5772 | { e++;
|
|---|
| 5773 | buffer = arr[e];
|
|---|
| 5774 | arr[e] = arr[k];
|
|---|
| 5775 | arr[k] = buffer;
|
|---|
| 5776 | }
|
|---|
| 5777 | buffer = arr[lidx];
|
|---|
| 5778 | arr[lidx]= arr[e];
|
|---|
| 5779 | arr[e] = buffer;
|
|---|
| 5780 | QuickSort(arr, lidx, e-1);
|
|---|
| 5781 | QuickSort(arr, e+1 , ridx);
|
|---|
| 5782 | return;
|
|---|
| 5783 | }
|
|---|
| 5784 |
|
|---|
| 5785 | G4double
|
|---|
| 5786 | G4HEInelastic::Alam( G4double a, G4double b, G4double c)
|
|---|
| 5787 | { return a*a + b*b + c*c - 2.*a*b - 2.*a*c -2.*b*c;
|
|---|
| 5788 | }
|
|---|
| 5789 |
|
|---|
| 5790 | G4double
|
|---|
| 5791 | G4HEInelastic::CalculatePhaseSpaceWeight( G4int /* npart */)
|
|---|
| 5792 | { G4double wfcn = 1.;
|
|---|
| 5793 | return wfcn;
|
|---|
| 5794 | }
|
|---|
| 5795 |
|
|---|
| 5796 |
|
|---|
| 5797 |
|
|---|
| 5798 |
|
|---|
| 5799 |
|
|---|
| 5800 |
|
|---|
| 5801 |
|
|---|
