[1197] | 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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[1315] | 26 | // $Id: G4WHadronElasticProcess.cc,v 1.3 2010/01/13 15:42:06 mkossov Exp $ |
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[1340] | 27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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[1197] | 28 | // |
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| 29 | // Geant4 Hadron Elastic Scattering Process |
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| 30 | // |
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| 31 | // Created 21 April 2006 V.Ivanchenko |
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| 32 | // |
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| 33 | // Modified: |
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| 34 | // 24.04.06 V.Ivanchenko add neutron scattering on hydrogen from CHIPS |
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| 35 | // 07.06.06 V.Ivanchenko fix problem of rotation of final state |
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| 36 | // 25.07.06 V.Ivanchenko add 19 MeV low energy for CHIPS |
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| 37 | // 26.09.06 V.Ivanchenko add lowestEnergy |
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| 38 | // 20.10.06 V.Ivanchenko initialise lowestEnergy=0 for neitrals, eV for charged |
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| 39 | // 23.01.07 V.Ivanchenko add cross section interfaces with Z and A |
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| 40 | // 02.05.07 V.Ivanchenko add He3 |
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[1315] | 41 | // 13.01.10: M.Kosov: Commented not used G4QElasticCrossSection & G4QCHIPSWorld |
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[1197] | 42 | // |
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| 43 | |
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| 44 | #include "G4WHadronElasticProcess.hh" |
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| 45 | #include "globals.hh" |
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| 46 | #include "G4CrossSectionDataStore.hh" |
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| 47 | #include "G4HadronElasticDataSet.hh" |
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| 48 | #include "G4VQCrossSection.hh" |
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[1315] | 49 | //#include "G4QElasticCrossSection.hh" |
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| 50 | //#include "G4QCHIPSWorld.hh" |
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[1197] | 51 | #include "G4Element.hh" |
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| 52 | #include "G4ElementVector.hh" |
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| 53 | #include "G4IsotopeVector.hh" |
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| 54 | #include "G4Neutron.hh" |
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| 55 | #include "G4ProductionCutsTable.hh" |
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| 56 | |
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| 57 | G4WHadronElasticProcess::G4WHadronElasticProcess(const G4String& pName) |
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| 58 | : G4HadronicProcess(pName) |
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| 59 | { |
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| 60 | SetProcessSubType(fHadronElastic); |
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| 61 | AddDataSet(new G4HadronElasticDataSet); |
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| 62 | theNeutron = G4Neutron::Neutron(); |
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| 63 | lowestEnergy = 1.*keV; |
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| 64 | lowestEnergyNeutron = 1.e-6*eV; |
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| 65 | } |
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| 66 | |
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| 67 | G4WHadronElasticProcess::~G4WHadronElasticProcess() |
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| 68 | { |
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| 69 | } |
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| 70 | |
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| 71 | G4VParticleChange* G4WHadronElasticProcess::PostStepDoIt( |
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| 72 | const G4Track& track, |
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| 73 | const G4Step& step) |
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| 74 | { |
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| 75 | aParticleChange.Initialize(track); |
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| 76 | G4double kineticEnergy = track.GetKineticEnergy(); |
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| 77 | const G4DynamicParticle* dynParticle = track.GetDynamicParticle(); |
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| 78 | const G4ParticleDefinition* part = dynParticle->GetDefinition(); |
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| 79 | |
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| 80 | // protection against numerical problems |
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| 81 | if(part == theNeutron) { |
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| 82 | if(kineticEnergy <= lowestEnergyNeutron) |
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| 83 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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| 84 | } else { |
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| 85 | if(kineticEnergy <= lowestEnergy) |
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| 86 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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| 87 | } |
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| 88 | |
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| 89 | G4Material* material = track.GetMaterial(); |
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| 90 | G4CrossSectionDataStore* store = GetCrossSectionDataStore(); |
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| 91 | G4double xsec = store->GetCrossSection(dynParticle,material); |
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| 92 | if(xsec <= DBL_MIN) return G4VDiscreteProcess::PostStepDoIt(track,step); |
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| 93 | |
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| 94 | // Select element |
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| 95 | G4Element* elm = store->SampleZandA(dynParticle,material,targetNucleus); |
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| 96 | |
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| 97 | G4HadronicInteraction* hadi = |
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| 98 | ChooseHadronicInteraction( kineticEnergy, material, elm); |
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| 99 | |
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| 100 | size_t idx = track.GetMaterialCutsCouple()->GetIndex(); |
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| 101 | G4double tcut = |
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| 102 | (*(G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3)))[idx]; |
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| 103 | hadi->SetRecoilEnergyThreshold(tcut); |
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| 104 | |
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| 105 | // Initialize the hadronic projectile from the track |
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| 106 | // G4cout << "track " << track.GetDynamicParticle()->Get4Momentum()<<G4endl; |
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| 107 | G4HadProjectile thePro(track); |
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| 108 | if(verboseLevel>1) { |
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| 109 | G4cout << "G4WHadronElasticProcess::PostStepDoIt for " |
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| 110 | << part->GetParticleName() |
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| 111 | << " Target Z= " << targetNucleus.GetZ() |
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| 112 | << " A= " << targetNucleus.GetZ() << G4endl; |
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| 113 | } |
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| 114 | G4HadFinalState* result = hadi->ApplyYourself(thePro, targetNucleus); |
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| 115 | G4ThreeVector indir = track.GetMomentumDirection(); |
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| 116 | G4ThreeVector outdir = (result->GetMomentumChange()).rotateUz(indir); |
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| 117 | |
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| 118 | if(verboseLevel>1) { |
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| 119 | G4cout << "Efin= " << result->GetEnergyChange() |
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| 120 | << " de= " << result->GetLocalEnergyDeposit() |
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| 121 | << " nsec= " << result->GetNumberOfSecondaries() |
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| 122 | << " dir= " << outdir |
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| 123 | << G4endl; |
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| 124 | } |
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| 125 | |
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| 126 | aParticleChange.ProposeEnergy(result->GetEnergyChange()); |
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| 127 | aParticleChange.ProposeMomentumDirection(outdir); |
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| 128 | if(result->GetNumberOfSecondaries() > 0) { |
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| 129 | aParticleChange.SetNumberOfSecondaries(1); |
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| 130 | G4DynamicParticle* p = result->GetSecondary(0)->GetParticle(); |
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| 131 | G4ThreeVector pdir = p->GetMomentumDirection(); |
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| 132 | // G4cout << "recoil " << pdir << G4endl; |
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| 133 | pdir = pdir.rotateUz(indir); |
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| 134 | // G4cout << "recoil rotated " << pdir << G4endl; |
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| 135 | p->SetMomentumDirection(pdir); |
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| 136 | aParticleChange.AddSecondary(p); |
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| 137 | } else { |
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| 138 | aParticleChange.SetNumberOfSecondaries(0); |
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| 139 | aParticleChange.ProposeLocalEnergyDeposit(result->GetLocalEnergyDeposit()); |
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| 140 | } |
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| 141 | result->Clear(); |
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| 142 | |
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| 143 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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| 144 | } |
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| 145 | |
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| 146 | G4bool G4WHadronElasticProcess:: |
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| 147 | IsApplicable(const G4ParticleDefinition& aParticleType) |
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| 148 | { |
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| 149 | return (&aParticleType == G4PionPlus::PionPlus() || |
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| 150 | &aParticleType == G4PionMinus::PionMinus() || |
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| 151 | &aParticleType == G4KaonPlus::KaonPlus() || |
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| 152 | &aParticleType == G4KaonZeroShort::KaonZeroShort() || |
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| 153 | &aParticleType == G4KaonZeroLong::KaonZeroLong() || |
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| 154 | &aParticleType == G4KaonMinus::KaonMinus() || |
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| 155 | &aParticleType == G4Proton::Proton() || |
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| 156 | &aParticleType == G4AntiProton::AntiProton() || |
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| 157 | &aParticleType == G4Neutron::Neutron() || |
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| 158 | &aParticleType == G4AntiNeutron::AntiNeutron() || |
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| 159 | &aParticleType == G4Lambda::Lambda() || |
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| 160 | &aParticleType == G4AntiLambda::AntiLambda() || |
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| 161 | &aParticleType == G4SigmaPlus::SigmaPlus() || |
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| 162 | &aParticleType == G4SigmaZero::SigmaZero() || |
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| 163 | &aParticleType == G4SigmaMinus::SigmaMinus() || |
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| 164 | &aParticleType == G4AntiSigmaPlus::AntiSigmaPlus() || |
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| 165 | &aParticleType == G4AntiSigmaZero::AntiSigmaZero() || |
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| 166 | &aParticleType == G4AntiSigmaMinus::AntiSigmaMinus() || |
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| 167 | &aParticleType == G4XiZero::XiZero() || |
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| 168 | &aParticleType == G4XiMinus::XiMinus() || |
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| 169 | &aParticleType == G4AntiXiZero::AntiXiZero() || |
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| 170 | &aParticleType == G4AntiXiMinus::AntiXiMinus() || |
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| 171 | &aParticleType == G4Deuteron::Deuteron() || |
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| 172 | &aParticleType == G4Triton::Triton() || |
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| 173 | &aParticleType == G4He3::He3() || |
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| 174 | &aParticleType == G4Alpha::Alpha() || |
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| 175 | &aParticleType == G4OmegaMinus::OmegaMinus() || |
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| 176 | &aParticleType == G4AntiOmegaMinus::AntiOmegaMinus() || |
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| 177 | &aParticleType == G4GenericIon::GenericIon()); |
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| 178 | } |
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| 179 | |
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| 180 | |
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