[819] | 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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[1228] | 26 | // $Id: G4RPGInelastic.cc,v 1.8 2009/11/20 16:39:38 dennis Exp $ |
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[1340] | 27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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[819] | 28 | // |
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| 29 | |
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| 30 | #include "G4RPGInelastic.hh" |
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| 31 | #include "Randomize.hh" |
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| 32 | #include "G4HadReentrentException.hh" |
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| 33 | #include "G4RPGStrangeProduction.hh" |
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| 34 | #include "G4RPGTwoBody.hh" |
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| 35 | |
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[1055] | 36 | |
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| 37 | G4RPGInelastic::G4RPGInelastic(const G4String& modelName) |
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| 38 | : G4HadronicInteraction(modelName) |
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| 39 | { |
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| 40 | cache = 0.0; |
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| 41 | particleDef[0] = G4PionZero::PionZero(); |
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| 42 | particleDef[1] = G4PionPlus::PionPlus(); |
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| 43 | particleDef[2] = G4PionMinus::PionMinus(); |
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| 44 | particleDef[3] = G4KaonPlus::KaonPlus(); |
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| 45 | particleDef[4] = G4KaonMinus::KaonMinus(); |
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| 46 | particleDef[5] = G4KaonZero::KaonZero(); |
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| 47 | particleDef[6] = G4AntiKaonZero::AntiKaonZero(); |
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| 48 | particleDef[7] = G4Proton::Proton(); |
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| 49 | particleDef[8] = G4Neutron::Neutron(); |
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| 50 | particleDef[9] = G4Lambda::Lambda(); |
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| 51 | particleDef[10] = G4SigmaPlus::SigmaPlus(); |
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| 52 | particleDef[11] = G4SigmaZero::SigmaZero(); |
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| 53 | particleDef[12] = G4SigmaMinus::SigmaMinus(); |
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| 54 | particleDef[13] = G4XiZero::XiZero(); |
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| 55 | particleDef[14] = G4XiMinus::XiMinus(); |
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| 56 | particleDef[15] = G4OmegaMinus::OmegaMinus(); |
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| 57 | particleDef[16] = G4AntiProton::AntiProton(); |
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| 58 | particleDef[17] = G4AntiNeutron::AntiNeutron(); |
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[1228] | 59 | |
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| 60 | G4cout << " **************************************************** " << G4endl; |
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| 61 | G4cout << " * The RPG model is currently under development and * " << G4endl; |
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| 62 | G4cout << " * should not be used. * " << G4endl; |
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| 63 | G4cout << " **************************************************** " << G4endl; |
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[1055] | 64 | } |
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| 65 | |
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| 66 | |
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[819] | 67 | G4double G4RPGInelastic::Pmltpc(G4int np, G4int nm, G4int nz, |
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| 68 | G4int n, G4double b, G4double c) |
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| 69 | { |
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| 70 | const G4double expxu = 82.; // upper bound for arg. of exp |
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| 71 | const G4double expxl = -expxu; // lower bound for arg. of exp |
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| 72 | G4double npf = 0.0; |
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| 73 | G4double nmf = 0.0; |
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| 74 | G4double nzf = 0.0; |
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| 75 | G4int i; |
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| 76 | for( i=2; i<=np; i++ )npf += std::log((double)i); |
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| 77 | for( i=2; i<=nm; i++ )nmf += std::log((double)i); |
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| 78 | for( i=2; i<=nz; i++ )nzf += std::log((double)i); |
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| 79 | G4double r; |
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| 80 | r = std::min( expxu, std::max( expxl, -(np-nm+nz+b)*(np-nm+nz+b)/(2*c*c*n*n)-npf-nmf-nzf ) ); |
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| 81 | return std::exp(r); |
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| 82 | } |
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| 83 | |
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| 84 | |
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| 85 | G4int G4RPGInelastic::Factorial( G4int n ) |
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| 86 | { |
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| 87 | G4int m = std::min(n,10); |
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| 88 | G4int result = 1; |
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| 89 | if( m <= 1 )return result; |
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| 90 | for( G4int i=2; i<=m; ++i )result *= i; |
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| 91 | return result; |
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| 92 | } |
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| 93 | |
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| 94 | |
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| 95 | G4bool G4RPGInelastic::MarkLeadingStrangeParticle( |
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| 96 | const G4ReactionProduct ¤tParticle, |
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| 97 | const G4ReactionProduct &targetParticle, |
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| 98 | G4ReactionProduct &leadParticle ) |
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| 99 | { |
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| 100 | // The following was in GenerateXandPt and TwoCluster. |
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| 101 | // Add a parameter to the GenerateXandPt function telling it about the |
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| 102 | // strange particle. |
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| 103 | // |
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| 104 | // Assumes that the original particle was a strange particle |
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| 105 | // |
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| 106 | G4bool lead = false; |
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| 107 | if( (currentParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
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| 108 | (currentParticle.GetDefinition() != G4Proton::Proton()) && |
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| 109 | (currentParticle.GetDefinition() != G4Neutron::Neutron()) ) |
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| 110 | { |
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| 111 | lead = true; |
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| 112 | leadParticle = currentParticle; // set lead to the incident particle |
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| 113 | } |
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| 114 | else if( (targetParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
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| 115 | (targetParticle.GetDefinition() != G4Proton::Proton()) && |
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| 116 | (targetParticle.GetDefinition() != G4Neutron::Neutron()) ) |
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| 117 | { |
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| 118 | lead = true; |
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| 119 | leadParticle = targetParticle; // set lead to the target particle |
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| 120 | } |
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| 121 | return lead; |
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| 122 | } |
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| 123 | |
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| 124 | |
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| 125 | void G4RPGInelastic::SetUpPions(const G4int np, const G4int nm, |
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| 126 | const G4int nz, |
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| 127 | G4FastVector<G4ReactionProduct,256> &vec, |
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| 128 | G4int &vecLen) |
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| 129 | { |
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| 130 | if( np+nm+nz == 0 )return; |
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| 131 | G4int i; |
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| 132 | G4ReactionProduct *p; |
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| 133 | for( i=0; i<np; ++i ) |
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| 134 | { |
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| 135 | p = new G4ReactionProduct; |
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| 136 | p->SetDefinition( G4PionPlus::PionPlus() ); |
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| 137 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
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| 138 | vec.SetElement( vecLen++, p ); |
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| 139 | } |
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| 140 | for( i=np; i<np+nm; ++i ) |
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| 141 | { |
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| 142 | p = new G4ReactionProduct; |
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| 143 | p->SetDefinition( G4PionMinus::PionMinus() ); |
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| 144 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
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| 145 | vec.SetElement( vecLen++, p ); |
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| 146 | } |
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| 147 | for( i=np+nm; i<np+nm+nz; ++i ) |
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| 148 | { |
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| 149 | p = new G4ReactionProduct; |
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| 150 | p->SetDefinition( G4PionZero::PionZero() ); |
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| 151 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
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| 152 | vec.SetElement( vecLen++, p ); |
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| 153 | } |
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| 154 | } |
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| 155 | |
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| 156 | |
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| 157 | void G4RPGInelastic::GetNormalizationConstant( |
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| 158 | const G4double energy, // MeV, <0 means annihilation channels |
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| 159 | G4double &n, |
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| 160 | G4double &anpn ) |
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| 161 | { |
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| 162 | const G4double expxu = 82.; // upper bound for arg. of exp |
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| 163 | const G4double expxl = -expxu; // lower bound for arg. of exp |
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| 164 | const G4int numSec = 60; |
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| 165 | // |
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| 166 | // the only difference between the calculation for annihilation channels |
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| 167 | // and normal is the starting value, iBegin, for the loop below |
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| 168 | // |
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| 169 | G4int iBegin = 1; |
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| 170 | G4double en = energy; |
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| 171 | if( energy < 0.0 ) |
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| 172 | { |
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| 173 | iBegin = 2; |
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| 174 | en *= -1.0; |
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| 175 | } |
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| 176 | // |
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| 177 | // number of total particles vs. centre of mass Energy - 2*proton mass |
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| 178 | // |
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| 179 | G4double aleab = std::log(en/GeV); |
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| 180 | n = 3.62567 + aleab*(0.665843 + aleab*(0.336514 + aleab*(0.117712 + 0.0136912*aleab))); |
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| 181 | n -= 2.0; |
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| 182 | // |
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| 183 | // normalization constant for kno-distribution |
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| 184 | // |
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| 185 | anpn = 0.0; |
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| 186 | G4double test, temp; |
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| 187 | for( G4int i=iBegin; i<=numSec; ++i ) |
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| 188 | { |
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| 189 | temp = pi*i/(2.0*n*n); |
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| 190 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(i*i)/(n*n) ) ) ); |
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| 191 | if( temp < 1.0 ) |
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| 192 | { |
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| 193 | if( test >= 1.0e-10 )anpn += temp*test; |
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| 194 | } |
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| 195 | else |
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| 196 | anpn += temp*test; |
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| 197 | } |
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| 198 | } |
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| 199 | |
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[962] | 200 | void |
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| 201 | G4RPGInelastic::CalculateMomenta(G4FastVector<G4ReactionProduct,256>& vec, |
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| 202 | G4int& vecLen, |
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| 203 | const G4HadProjectile* originalIncident, |
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| 204 | const G4DynamicParticle* originalTarget, |
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| 205 | G4ReactionProduct& modifiedOriginal, |
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| 206 | G4Nucleus& targetNucleus, |
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| 207 | G4ReactionProduct& currentParticle, |
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| 208 | G4ReactionProduct& targetParticle, |
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| 209 | G4bool& incidentHasChanged, |
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| 210 | G4bool& targetHasChanged, |
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| 211 | G4bool quasiElastic) |
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[819] | 212 | { |
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| 213 | cache = 0; |
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| 214 | what = originalIncident->Get4Momentum().vect(); |
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| 215 | |
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| 216 | G4ReactionProduct leadingStrangeParticle; |
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| 217 | |
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[962] | 218 | // strangeProduction.ReactionStage(originalIncident, modifiedOriginal, |
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| 219 | // incidentHasChanged, originalTarget, |
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| 220 | // targetParticle, targetHasChanged, |
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| 221 | // targetNucleus, currentParticle, |
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| 222 | // vec, vecLen, |
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| 223 | // false, leadingStrangeParticle); |
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[819] | 224 | |
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| 225 | if( quasiElastic ) |
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| 226 | { |
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| 227 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
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| 228 | incidentHasChanged, originalTarget, |
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| 229 | targetParticle, targetHasChanged, |
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| 230 | targetNucleus, currentParticle, |
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| 231 | vec, vecLen, |
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| 232 | false, leadingStrangeParticle); |
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| 233 | return; |
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| 234 | } |
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| 235 | |
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| 236 | G4bool leadFlag = MarkLeadingStrangeParticle(currentParticle, |
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| 237 | targetParticle, |
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| 238 | leadingStrangeParticle ); |
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| 239 | // |
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| 240 | // Note: the number of secondaries can be reduced in GenerateXandPt |
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| 241 | // and TwoCluster |
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| 242 | // |
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| 243 | G4bool finishedGenXPt = false; |
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| 244 | G4bool annihilation = false; |
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| 245 | if( originalIncident->GetDefinition()->GetPDGEncoding() < 0 && |
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| 246 | currentParticle.GetMass() == 0.0 && targetParticle.GetMass() == 0.0 ) |
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| 247 | { |
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| 248 | // original was an anti-particle and annihilation has taken place |
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| 249 | annihilation = true; |
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| 250 | G4double ekcor = 1.0; |
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| 251 | G4double ek = originalIncident->GetKineticEnergy(); |
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| 252 | G4double ekOrg = ek; |
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| 253 | |
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| 254 | const G4double tarmas = originalTarget->GetDefinition()->GetPDGMass(); |
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| 255 | if( ek > 1.0*GeV )ekcor = 1./(ek/GeV); |
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| 256 | const G4double atomicWeight = targetNucleus.GetN(); |
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| 257 | ek = 2*tarmas + ek*(1.+ekcor/atomicWeight); |
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| 258 | G4double tkin = targetNucleus.Cinema(ek); |
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| 259 | ek += tkin; |
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| 260 | ekOrg += tkin; |
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| 261 | // modifiedOriginal.SetKineticEnergy( ekOrg ); |
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| 262 | // |
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| 263 | // evaporation -- re-calculate black track energies |
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| 264 | // this was Done already just before the cascade |
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| 265 | // |
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| 266 | tkin = targetNucleus.AnnihilationEvaporationEffects(ek, ekOrg); |
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| 267 | ekOrg -= tkin; |
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| 268 | ekOrg = std::max( 0.0001*GeV, ekOrg ); |
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| 269 | modifiedOriginal.SetKineticEnergy( ekOrg ); |
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| 270 | G4double amas = originalIncident->GetDefinition()->GetPDGMass(); |
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| 271 | G4double et = ekOrg + amas; |
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| 272 | G4double p = std::sqrt( std::abs(et*et-amas*amas) ); |
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| 273 | G4double pp = modifiedOriginal.GetMomentum().mag(); |
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| 274 | if( pp > 0.0 ) |
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| 275 | { |
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| 276 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
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| 277 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
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| 278 | } |
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| 279 | if( ekOrg <= 0.0001 ) |
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| 280 | { |
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| 281 | modifiedOriginal.SetKineticEnergy( 0.0 ); |
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| 282 | modifiedOriginal.SetMomentum( 0.0, 0.0, 0.0 ); |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | // twsup gives percentage of time two-cluster model is called |
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| 287 | |
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| 288 | const G4double twsup[] = { 1.0, 0.7, 0.5, 0.3, 0.2, 0.1 }; |
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| 289 | G4double rand1 = G4UniformRand(); |
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| 290 | G4double rand2 = G4UniformRand(); |
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| 291 | |
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| 292 | // Cache current, target, and secondaries |
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| 293 | G4ReactionProduct saveCurrent = currentParticle; |
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| 294 | G4ReactionProduct saveTarget = targetParticle; |
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| 295 | std::vector<G4ReactionProduct> savevec; |
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| 296 | for (G4int i = 0; i < vecLen; i++) savevec.push_back(*vec[i]); |
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| 297 | |
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[962] | 298 | // Call fragmentation code if |
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| 299 | // 1) there is annihilation, or |
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| 300 | // 2) there are more than 5 secondaries, or |
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| 301 | // 3) incident KE is > 1 GeV AND |
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| 302 | // ( incident is a kaon AND rand < 0.5 OR twsup ) |
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| 303 | // |
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| 304 | |
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| 305 | if( annihilation || vecLen > 5 || |
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| 306 | ( modifiedOriginal.GetKineticEnergy()/GeV >= 1.0 && |
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| 307 | |
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[819] | 308 | (((originalIncident->GetDefinition() == G4KaonPlus::KaonPlus() || |
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| 309 | originalIncident->GetDefinition() == G4KaonMinus::KaonMinus() || |
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| 310 | originalIncident->GetDefinition() == G4KaonZeroLong::KaonZeroLong() || |
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| 311 | originalIncident->GetDefinition() == G4KaonZeroShort::KaonZeroShort()) && |
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[962] | 312 | rand1 < 0.5) |
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| 313 | || rand2 > twsup[vecLen]) ) ) |
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[819] | 314 | |
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| 315 | finishedGenXPt = |
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| 316 | fragmentation.ReactionStage(originalIncident, modifiedOriginal, |
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| 317 | incidentHasChanged, originalTarget, |
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| 318 | targetParticle, targetHasChanged, |
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| 319 | targetNucleus, currentParticle, |
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| 320 | vec, vecLen, |
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| 321 | leadFlag, leadingStrangeParticle); |
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| 322 | |
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[962] | 323 | if (finishedGenXPt) return; |
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[819] | 324 | |
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| 325 | G4bool finishedTwoClu = false; |
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[962] | 326 | |
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| 327 | if (modifiedOriginal.GetTotalMomentum() < 1.0) { |
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| 328 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
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[819] | 329 | vecLen = 0; |
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[962] | 330 | |
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| 331 | } else { |
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[819] | 332 | // Occaisionally, GenerateXandPt will fail in the annihilation channel. |
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| 333 | // Restore current, target and secondaries to pre-GenerateXandPt state |
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| 334 | // before trying annihilation in TwoCluster |
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| 335 | |
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| 336 | if (!finishedGenXPt && annihilation) { |
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| 337 | currentParticle = saveCurrent; |
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| 338 | targetParticle = saveTarget; |
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| 339 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
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| 340 | vecLen = 0; |
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| 341 | vec.Initialize( 0 ); |
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| 342 | for (G4int i = 0; i < G4int(savevec.size()); i++) { |
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| 343 | G4ReactionProduct* p = new G4ReactionProduct; |
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| 344 | *p = savevec[i]; |
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| 345 | vec.SetElement( vecLen++, p ); |
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| 346 | } |
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| 347 | } |
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| 348 | |
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[962] | 349 | // Big violations of energy conservation in this method - don't use |
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| 350 | // |
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| 351 | // pionSuppression.ReactionStage(originalIncident, modifiedOriginal, |
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| 352 | // incidentHasChanged, originalTarget, |
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| 353 | // targetParticle, targetHasChanged, |
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| 354 | // targetNucleus, currentParticle, |
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| 355 | // vec, vecLen, |
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| 356 | // false, leadingStrangeParticle); |
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[819] | 357 | |
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| 358 | try |
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| 359 | { |
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| 360 | finishedTwoClu = |
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| 361 | twoCluster.ReactionStage(originalIncident, modifiedOriginal, |
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| 362 | incidentHasChanged, originalTarget, |
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| 363 | targetParticle, targetHasChanged, |
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| 364 | targetNucleus, currentParticle, |
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| 365 | vec, vecLen, |
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| 366 | leadFlag, leadingStrangeParticle); |
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| 367 | } |
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| 368 | catch(G4HadReentrentException aC) |
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| 369 | { |
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| 370 | aC.Report(G4cout); |
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| 371 | throw G4HadReentrentException(__FILE__, __LINE__, "Failing to calculate momenta"); |
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| 372 | } |
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| 373 | } |
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| 374 | |
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[962] | 375 | if (finishedTwoClu) return; |
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[819] | 376 | |
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| 377 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
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| 378 | incidentHasChanged, originalTarget, |
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| 379 | targetParticle, targetHasChanged, |
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| 380 | targetNucleus, currentParticle, |
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| 381 | vec, vecLen, |
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| 382 | false, leadingStrangeParticle); |
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| 383 | } |
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| 384 | |
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[962] | 385 | /* |
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[819] | 386 | void G4RPGInelastic:: |
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| 387 | Rotate(G4FastVector<G4ReactionProduct,256> &vec, G4int &vecLen) |
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| 388 | { |
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| 389 | G4double rotation = 2.*pi*G4UniformRand(); |
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| 390 | cache = rotation; |
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| 391 | G4int i; |
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| 392 | for( i=0; i<vecLen; ++i ) |
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| 393 | { |
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| 394 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
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| 395 | momentum = momentum.rotate(rotation, what); |
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| 396 | vec[i]->SetMomentum(momentum); |
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| 397 | } |
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| 398 | } |
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[962] | 399 | */ |
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[819] | 400 | |
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| 401 | void |
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[962] | 402 | G4RPGInelastic::SetUpChange(G4FastVector<G4ReactionProduct,256>& vec, |
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| 403 | G4int& vecLen, |
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| 404 | G4ReactionProduct& currentParticle, |
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| 405 | G4ReactionProduct& targetParticle, |
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| 406 | G4bool& incidentHasChanged ) |
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[819] | 407 | { |
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| 408 | theParticleChange.Clear(); |
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[962] | 409 | G4ParticleDefinition* aKaonZL = G4KaonZeroLong::KaonZeroLong(); |
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| 410 | G4ParticleDefinition* aKaonZS = G4KaonZeroShort::KaonZeroShort(); |
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[819] | 411 | G4int i; |
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[962] | 412 | |
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| 413 | if (currentParticle.GetDefinition() == particleDef[k0]) { |
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| 414 | if (G4UniformRand() < 0.5) { |
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| 415 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
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[819] | 416 | incidentHasChanged = true; |
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[962] | 417 | } else { |
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| 418 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
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[819] | 419 | } |
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[962] | 420 | } else if (currentParticle.GetDefinition() == particleDef[k0b]) { |
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| 421 | if (G4UniformRand() < 0.5) { |
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| 422 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
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| 423 | } else { |
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| 424 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
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[819] | 425 | incidentHasChanged = true; |
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| 426 | } |
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| 427 | } |
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| 428 | |
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[962] | 429 | if (targetParticle.GetDefinition() == particleDef[k0] || |
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| 430 | targetParticle.GetDefinition() == particleDef[k0b] ) { |
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| 431 | if (G4UniformRand() < 0.5) { |
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| 432 | targetParticle.SetDefinitionAndUpdateE(aKaonZL); |
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| 433 | } else { |
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| 434 | targetParticle.SetDefinitionAndUpdateE(aKaonZS); |
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| 435 | } |
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[819] | 436 | } |
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[962] | 437 | |
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| 438 | for (i = 0; i < vecLen; ++i) { |
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| 439 | if (vec[i]->GetDefinition() == particleDef[k0] || |
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| 440 | vec[i]->GetDefinition() == particleDef[k0b] ) { |
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| 441 | if (G4UniformRand() < 0.5) { |
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| 442 | vec[i]->SetDefinitionAndUpdateE(aKaonZL); |
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| 443 | } else { |
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| 444 | vec[i]->SetDefinitionAndUpdateE(aKaonZS); |
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| 445 | } |
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[819] | 446 | } |
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| 447 | } |
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| 448 | |
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[962] | 449 | if (incidentHasChanged) { |
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[819] | 450 | G4DynamicParticle* p0 = new G4DynamicParticle; |
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[962] | 451 | p0->SetDefinition(currentParticle.GetDefinition() ); |
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| 452 | p0->SetMomentum(currentParticle.GetMomentum() ); |
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[819] | 453 | theParticleChange.AddSecondary( p0 ); |
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| 454 | theParticleChange.SetStatusChange( stopAndKill ); |
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| 455 | theParticleChange.SetEnergyChange( 0.0 ); |
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[962] | 456 | |
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| 457 | } else { |
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[819] | 458 | G4double p = currentParticle.GetMomentum().mag()/MeV; |
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| 459 | G4ThreeVector m = currentParticle.GetMomentum(); |
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[962] | 460 | if (p > DBL_MIN) |
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[819] | 461 | theParticleChange.SetMomentumChange( m.x()/p, m.y()/p, m.z()/p ); |
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| 462 | else |
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| 463 | theParticleChange.SetMomentumChange( 0.0, 0.0, 1.0 ); |
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| 464 | |
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| 465 | G4double aE = currentParticle.GetKineticEnergy(); |
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| 466 | if (std::fabs(aE)<.1*eV) aE=.1*eV; |
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| 467 | theParticleChange.SetEnergyChange( aE ); |
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| 468 | } |
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| 469 | |
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[962] | 470 | if (targetParticle.GetMass() > 0.0) // Tgt particle can be eliminated in TwoBody |
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[819] | 471 | { |
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| 472 | G4ThreeVector momentum = targetParticle.GetMomentum(); |
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| 473 | momentum = momentum.rotate(cache, what); |
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| 474 | G4double targKE = targetParticle.GetKineticEnergy(); |
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| 475 | G4ThreeVector dir(0.0, 0.0, 1.0); |
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| 476 | if (targKE < DBL_MIN) |
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| 477 | targKE = DBL_MIN; |
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| 478 | else |
---|
| 479 | dir = momentum/momentum.mag(); |
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| 480 | |
---|
| 481 | G4DynamicParticle* p1 = |
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| 482 | new G4DynamicParticle(targetParticle.GetDefinition(), dir, targKE); |
---|
| 483 | |
---|
| 484 | theParticleChange.AddSecondary( p1 ); |
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| 485 | } |
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| 486 | |
---|
| 487 | G4DynamicParticle* p; |
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[962] | 488 | for (i = 0; i < vecLen; ++i) { |
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[819] | 489 | G4double secKE = vec[i]->GetKineticEnergy(); |
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| 490 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
---|
| 491 | G4ThreeVector dir(0.0, 0.0, 1.0); |
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| 492 | if (secKE < DBL_MIN) |
---|
| 493 | secKE = DBL_MIN; |
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| 494 | else |
---|
| 495 | dir = momentum/momentum.mag(); |
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| 496 | |
---|
| 497 | p = new G4DynamicParticle(vec[i]->GetDefinition(), dir, secKE); |
---|
| 498 | theParticleChange.AddSecondary( p ); |
---|
| 499 | delete vec[i]; |
---|
| 500 | } |
---|
| 501 | } |
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[962] | 502 | |
---|
| 503 | |
---|
| 504 | std::pair<G4int, G4double> |
---|
| 505 | G4RPGInelastic::interpolateEnergy(G4double e) const |
---|
| 506 | { |
---|
| 507 | G4int index = 29; |
---|
| 508 | G4double fraction = 0.0; |
---|
| 509 | |
---|
| 510 | for (G4int i = 1; i < 30; i++) { |
---|
| 511 | if (e < energyScale[i]) { |
---|
| 512 | index = i-1; |
---|
| 513 | fraction = (e - energyScale[index]) / (energyScale[i] - energyScale[index]); |
---|
| 514 | break; |
---|
| 515 | } |
---|
| 516 | } |
---|
| 517 | return std::pair<G4int, G4double>(index, fraction); |
---|
| 518 | } |
---|
| 519 | |
---|
| 520 | |
---|
| 521 | G4int |
---|
| 522 | G4RPGInelastic::sampleFlat(std::vector<G4double> sigma) const |
---|
| 523 | { |
---|
| 524 | G4int i; |
---|
| 525 | G4double sum(0.); |
---|
| 526 | for (i = 0; i < G4int(sigma.size()); i++) sum += sigma[i]; |
---|
| 527 | |
---|
| 528 | G4double fsum = sum*G4UniformRand(); |
---|
| 529 | G4double partialSum = 0.0; |
---|
| 530 | G4int channel = 0; |
---|
| 531 | |
---|
| 532 | for (i = 0; i < G4int(sigma.size()); i++) { |
---|
| 533 | partialSum += sigma[i]; |
---|
| 534 | if (fsum < partialSum) { |
---|
| 535 | channel = i; |
---|
| 536 | break; |
---|
| 537 | } |
---|
| 538 | } |
---|
| 539 | |
---|
| 540 | return channel; |
---|
| 541 | } |
---|
| 542 | |
---|
| 543 | |
---|
| 544 | void G4RPGInelastic::CheckQnums(G4FastVector<G4ReactionProduct,256> &vec, |
---|
| 545 | G4int &vecLen, |
---|
| 546 | G4ReactionProduct ¤tParticle, |
---|
| 547 | G4ReactionProduct &targetParticle, |
---|
| 548 | G4double Q, G4double B, G4double S) |
---|
| 549 | { |
---|
| 550 | G4ParticleDefinition* projDef = currentParticle.GetDefinition(); |
---|
| 551 | G4ParticleDefinition* targDef = targetParticle.GetDefinition(); |
---|
| 552 | G4double chargeSum = projDef->GetPDGCharge() + targDef->GetPDGCharge(); |
---|
| 553 | G4double baryonSum = projDef->GetBaryonNumber() + targDef->GetBaryonNumber(); |
---|
| 554 | G4double strangenessSum = projDef->GetQuarkContent(3) - |
---|
| 555 | projDef->GetAntiQuarkContent(3) + |
---|
| 556 | targDef->GetQuarkContent(3) - |
---|
| 557 | targDef->GetAntiQuarkContent(3); |
---|
| 558 | |
---|
| 559 | G4ParticleDefinition* secDef = 0; |
---|
| 560 | for (G4int i = 0; i < vecLen; i++) { |
---|
| 561 | secDef = vec[i]->GetDefinition(); |
---|
| 562 | chargeSum += secDef->GetPDGCharge(); |
---|
| 563 | baryonSum += secDef->GetBaryonNumber(); |
---|
| 564 | strangenessSum += secDef->GetQuarkContent(3) |
---|
| 565 | - secDef->GetAntiQuarkContent(3); |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | G4bool OK = true; |
---|
| 569 | if (chargeSum != Q) { |
---|
| 570 | G4cout << " Charge not conserved " << G4endl; |
---|
| 571 | OK = false; |
---|
| 572 | } |
---|
| 573 | if (baryonSum != B) { |
---|
| 574 | G4cout << " Baryon number not conserved " << G4endl; |
---|
| 575 | OK = false; |
---|
| 576 | } |
---|
| 577 | if (strangenessSum != S) { |
---|
| 578 | G4cout << " Strangeness not conserved " << G4endl; |
---|
| 579 | OK = false; |
---|
| 580 | } |
---|
| 581 | |
---|
| 582 | if (!OK) { |
---|
| 583 | G4cout << " projectile: " << projDef->GetParticleName() |
---|
| 584 | << " target: " << targDef->GetParticleName() << G4endl; |
---|
| 585 | for (G4int i = 0; i < vecLen; i++) { |
---|
| 586 | secDef = vec[i]->GetDefinition(); |
---|
| 587 | G4cout << secDef->GetParticleName() << " " ; |
---|
| 588 | } |
---|
| 589 | G4cout << G4endl; |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | |
---|
| 595 | const G4double G4RPGInelastic::energyScale[30] = { |
---|
| 596 | 0.0, 0.01, 0.013, 0.018, 0.024, 0.032, 0.042, 0.056, 0.075, 0.1, |
---|
| 597 | 0.13, 0.18, 0.24, 0.32, 0.42, 0.56, 0.75, 1.0, 1.3, 1.8, |
---|
| 598 | 2.4, 3.2, 4.2, 5.6, 7.5, 10.0, 13.0, 18.0, 24.0, 32.0 }; |
---|
| 599 | |
---|
| 600 | |
---|
[819] | 601 | /* end of file */ |
---|