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