[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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| 26 | // |
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[962] | 27 | // $Id: G4ChargeExchangeProcess.cc,v 1.15 2008/11/27 16:43:00 vnivanch Exp $ |
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[1228] | 28 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 29 | // |
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| 30 | // |
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[962] | 31 | // Geant4 Hadron Charge Exchange Process -- source file |
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[819] | 32 | // |
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| 33 | // Created 21 April 2006 V.Ivanchenko |
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| 34 | // |
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| 35 | // Modified: |
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| 36 | // 24-Apr-06 V.Ivanchenko add neutron scattering on hydrogen from CHIPS |
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| 37 | // 07-Jun-06 V.Ivanchenko fix problem of rotation of final state |
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| 38 | // 25-Jul-06 V.Ivanchenko add 19 MeV low energy for CHIPS |
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| 39 | // 23-Jan-07 V.Ivanchenko add cross section interfaces with Z and A |
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| 40 | // and do not use CHIPS for cross sections |
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| 41 | // |
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| 42 | |
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| 43 | #include "G4ChargeExchangeProcess.hh" |
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| 44 | #include "globals.hh" |
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| 45 | #include "G4CrossSectionDataStore.hh" |
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| 46 | #include "G4HadronElasticDataSet.hh" |
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| 47 | #include "G4Element.hh" |
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| 48 | #include "G4ElementVector.hh" |
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| 49 | #include "G4IsotopeVector.hh" |
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| 50 | #include "G4Neutron.hh" |
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| 51 | #include "G4Proton.hh" |
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| 52 | #include "G4PhysicsLinearVector.hh" |
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| 53 | |
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| 54 | G4ChargeExchangeProcess::G4ChargeExchangeProcess(const G4String& procName) |
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| 55 | : G4HadronicProcess(procName), first(true) |
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| 56 | { |
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[962] | 57 | SetProcessSubType(fChargeExchange); |
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| 58 | thEnergy = 20.*MeV; |
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[819] | 59 | verboseLevel= 1; |
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| 60 | AddDataSet(new G4HadronElasticDataSet); |
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| 61 | theProton = G4Proton::Proton(); |
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| 62 | theNeutron = G4Neutron::Neutron(); |
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| 63 | theAProton = G4AntiProton::AntiProton(); |
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| 64 | theANeutron = G4AntiNeutron::AntiNeutron(); |
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| 65 | thePiPlus = G4PionPlus::PionPlus(); |
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| 66 | thePiMinus = G4PionMinus::PionMinus(); |
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| 67 | thePiZero = G4PionZero::PionZero(); |
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| 68 | theKPlus = G4KaonPlus::KaonPlus(); |
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| 69 | theKMinus = G4KaonMinus::KaonMinus(); |
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| 70 | theK0S = G4KaonZeroShort::KaonZeroShort(); |
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| 71 | theK0L = G4KaonZeroLong::KaonZeroLong(); |
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| 72 | theL = G4Lambda::Lambda(); |
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| 73 | theAntiL = G4AntiLambda::AntiLambda(); |
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| 74 | theSPlus = G4SigmaPlus::SigmaPlus(); |
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| 75 | theASPlus = G4AntiSigmaPlus::AntiSigmaPlus(); |
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| 76 | theSMinus = G4SigmaMinus::SigmaMinus(); |
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| 77 | theASMinus = G4AntiSigmaMinus::AntiSigmaMinus(); |
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| 78 | theS0 = G4SigmaZero::SigmaZero(); |
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| 79 | theAS0 = G4AntiSigmaZero::AntiSigmaZero(); |
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| 80 | theXiMinus = G4XiMinus::XiMinus(); |
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| 81 | theXi0 = G4XiZero::XiZero(); |
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| 82 | theAXiMinus = G4AntiXiMinus::AntiXiMinus(); |
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| 83 | theAXi0 = G4AntiXiZero::AntiXiZero(); |
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| 84 | theOmega = G4OmegaMinus::OmegaMinus(); |
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| 85 | theAOmega = G4AntiOmegaMinus::AntiOmegaMinus(); |
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| 86 | theD = G4Deuteron::Deuteron(); |
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| 87 | theT = G4Triton::Triton(); |
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| 88 | theA = G4Alpha::Alpha(); |
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| 89 | theA = G4He3::He3(); |
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| 90 | } |
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| 91 | |
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| 92 | G4ChargeExchangeProcess::~G4ChargeExchangeProcess() |
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| 93 | { |
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| 94 | delete factors; |
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| 95 | } |
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| 96 | |
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| 97 | void G4ChargeExchangeProcess:: |
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| 98 | BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
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| 99 | { |
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| 100 | if(first) { |
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| 101 | first = false; |
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| 102 | theParticle = &aParticleType; |
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| 103 | pPDG = theParticle->GetPDGEncoding(); |
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| 104 | |
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| 105 | store = G4HadronicProcess::GetCrossSectionDataStore(); |
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| 106 | |
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| 107 | const size_t n = 10; |
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| 108 | if(theParticle == thePiPlus || theParticle == thePiMinus || |
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| 109 | theParticle == theKPlus || theParticle == theKMinus || |
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| 110 | theParticle == theK0S || theParticle == theK0L) { |
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| 111 | |
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| 112 | G4double F[n] = {0.33,0.27,0.29,0.31,0.27,0.18,0.13,0.1,0.09,0.07}; |
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[962] | 113 | factors = new G4PhysicsLinearVector(0.0,2.0*GeV,n); |
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[819] | 114 | for(size_t i=0; i<n; i++) {factors->PutValue(i,F[i]);} |
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| 115 | |
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| 116 | } else { |
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| 117 | |
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| 118 | G4double F[n] = {0.50,0.45,0.40,0.35,0.30,0.25,0.06,0.04,0.005,0.0}; |
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[962] | 119 | factors = new G4PhysicsLinearVector(0.0,4.0*GeV,n); |
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[819] | 120 | for(size_t i=0; i<n; i++) {factors->PutValue(i,F[i]);} |
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| 121 | } |
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[962] | 122 | //factors->SetSpline(true); |
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[819] | 123 | |
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| 124 | if(verboseLevel>1) |
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| 125 | G4cout << "G4ChargeExchangeProcess for " |
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| 126 | << theParticle->GetParticleName() |
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| 127 | << G4endl; |
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| 128 | } |
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[962] | 129 | G4HadronicProcess::BuildPhysicsTable(aParticleType); |
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[819] | 130 | } |
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| 131 | |
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| 132 | G4double G4ChargeExchangeProcess::GetMicroscopicCrossSection( |
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| 133 | const G4DynamicParticle* dp, |
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| 134 | const G4Element* elm, |
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| 135 | G4double temp) |
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| 136 | { |
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| 137 | // gives the microscopic cross section in GEANT4 internal units |
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| 138 | G4double Z = elm->GetZ(); |
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| 139 | G4int iz = G4int(Z); |
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| 140 | G4double x = 0.0; |
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| 141 | |
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[962] | 142 | // The process is effective only above the threshold |
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| 143 | if(iz == 1 || dp->GetKineticEnergy() < thEnergy) return x; |
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| 144 | |
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[819] | 145 | if(verboseLevel>1) |
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| 146 | G4cout << "G4ChargeExchangeProcess compute GHAD CS for element " |
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| 147 | << elm->GetName() |
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| 148 | << G4endl; |
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| 149 | x = store->GetCrossSection(dp, elm, temp); |
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| 150 | |
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| 151 | if(verboseLevel>1) |
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| 152 | G4cout << "G4ChargeExchangeProcess cross(mb)= " << x/millibarn |
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| 153 | << " E(MeV)= " << dp->GetKineticEnergy() |
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| 154 | << " " << theParticle->GetParticleName() |
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| 155 | << " in Z= " << iz |
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| 156 | << G4endl; |
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| 157 | G4bool b; |
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| 158 | G4double A = elm->GetN(); |
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[962] | 159 | G4double ptot = dp->GetTotalMomentum(); |
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| 160 | x *= factors->GetValue(ptot, b)/std::pow(A, 0.42); |
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[819] | 161 | if(theParticle == thePiPlus || theParticle == theProton || |
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| 162 | theParticle == theKPlus || theParticle == theANeutron) |
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[962] | 163 | { x *= (1.0 - Z/A); } |
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[819] | 164 | |
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| 165 | else if(theParticle == thePiMinus || theParticle == theNeutron || |
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| 166 | theParticle == theKMinus || theParticle == theAProton) |
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[962] | 167 | { x *= Z/A; } |
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[819] | 168 | |
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[962] | 169 | if(theParticle->GetPDGMass() < GeV) { |
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| 170 | if(ptot > 2.*GeV) x *= 4.0*GeV*GeV/(ptot*ptot); |
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[819] | 171 | } |
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| 172 | |
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[962] | 173 | if(verboseLevel>1) |
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| 174 | G4cout << "Corrected cross(mb)= " << x/millibarn << G4endl; |
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[819] | 175 | |
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[962] | 176 | return x; |
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[819] | 177 | } |
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| 178 | |
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| 179 | G4bool G4ChargeExchangeProcess:: |
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| 180 | IsApplicable(const G4ParticleDefinition& aParticleType) |
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| 181 | { |
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| 182 | const G4ParticleDefinition* p = &aParticleType; |
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| 183 | return (p == thePiPlus || p == thePiMinus || |
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| 184 | p == theProton || p == theNeutron || |
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| 185 | p == theAProton|| p == theANeutron|| |
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| 186 | p == theKPlus || p == theKMinus || |
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| 187 | p == theK0S || p == theK0L || |
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| 188 | p == theL); |
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| 189 | } |
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| 190 | |
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| 191 | void G4ChargeExchangeProcess:: |
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| 192 | DumpPhysicsTable(const G4ParticleDefinition& aParticleType) |
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| 193 | { |
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| 194 | store->DumpPhysicsTable(aParticleType); |
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| 195 | } |
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