[1350] | 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 | // $Id: G4CHIPSElasticXS.cc,v 1.2 2010/09/24 13:56:00 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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| 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4CHIPSElasticXS |
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| 35 | // |
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| 36 | // Author Ivantchenko, Geant4, 3-Aug-09 |
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| 37 | // |
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| 38 | // Modifications: |
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| 39 | // |
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| 40 | |
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| 41 | #include "G4CHIPSElasticXS.hh" |
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| 42 | #include "G4DynamicParticle.hh" |
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| 43 | #include "G4ParticleDefinition.hh" |
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| 44 | #include "G4Element.hh" |
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| 45 | #include "G4Proton.hh" |
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| 46 | #include "G4Neutron.hh" |
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| 47 | #include "G4VQCrossSection.hh" |
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| 48 | #include "G4QProtonElasticCrossSection.hh" |
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| 49 | #include "G4QNeutronElasticCrossSection.hh" |
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| 50 | |
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| 51 | G4CHIPSElasticXS::G4CHIPSElasticXS() |
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| 52 | : G4VCrossSectionDataSet("CHIPSElasticXS"), |
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| 53 | theProton(G4Proton::Proton()), |
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| 54 | theNeutron(G4Neutron::Neutron()), |
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| 55 | thEnergy(19*CLHEP::MeV), |
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| 56 | isInitialized(false) |
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| 57 | { |
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| 58 | // verboseLevel = 0; |
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| 59 | pCManager = G4QProtonElasticCrossSection::GetPointer(); |
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| 60 | nCManager = G4QNeutronElasticCrossSection::GetPointer(); |
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| 61 | } |
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| 62 | |
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| 63 | G4CHIPSElasticXS::~G4CHIPSElasticXS() |
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| 64 | {} |
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| 65 | |
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| 66 | G4bool |
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| 67 | G4CHIPSElasticXS::IsApplicable(const G4DynamicParticle* dyn, |
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| 68 | const G4Element* elm) |
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| 69 | { |
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| 70 | return (elm->GetZ() < 2.5 && dyn->GetKineticEnergy() > thEnergy); |
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| 71 | } |
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| 72 | |
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| 73 | G4bool |
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| 74 | G4CHIPSElasticXS::IsZAApplicable(const G4DynamicParticle* dyn, |
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| 75 | G4double ZZ, G4double /*AA*/) |
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| 76 | { |
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| 77 | return (ZZ < 2.5 && dyn->GetKineticEnergy() > thEnergy); |
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| 78 | } |
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| 79 | |
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| 80 | G4bool |
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| 81 | G4CHIPSElasticXS::IsIsoApplicable(const G4DynamicParticle* dyn, |
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| 82 | G4int Z, G4int /*N*/) |
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| 83 | { |
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| 84 | return (Z <= 2 && dyn->GetKineticEnergy() > thEnergy); |
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| 85 | } |
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| 86 | |
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| 87 | G4double |
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| 88 | G4CHIPSElasticXS::GetCrossSection(const G4DynamicParticle* aParticle, |
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| 89 | const G4Element* elm, |
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| 90 | G4double) |
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| 91 | { |
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| 92 | G4double xs = 0.0; |
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| 93 | G4int Z = G4int(elm->GetZ()); |
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| 94 | G4IsotopeVector* isv = elm->GetIsotopeVector(); |
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| 95 | G4int ni = 0; |
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| 96 | if(isv) { ni = isv->size(); } |
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| 97 | |
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| 98 | if(ni <= 1) { |
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| 99 | G4int A = G4int(elm->GetN()+0.5); |
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| 100 | xs = GetZandACrossSection(aParticle, Z, A); |
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| 101 | } else { |
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| 102 | G4double* ab = elm->GetRelativeAbundanceVector(); |
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| 103 | for(G4int j=0; j<ni; ++j) { |
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| 104 | G4int A = (*isv)[j]->GetN(); |
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| 105 | xs += ab[j]*GetZandACrossSection(aParticle, Z, A); |
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| 106 | } |
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| 107 | } |
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| 108 | |
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| 109 | if(verboseLevel > 1) { |
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| 110 | G4cout << "G4CHIPSElasticXS::GetCrossSection for " |
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| 111 | << theParticle->GetParticleName() |
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| 112 | << " on " << elm->GetName() |
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| 113 | << " ekin(MeV)= " << aParticle->GetKineticEnergy()/CLHEP::MeV |
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| 114 | << ", XSel(bn)= " << xs/CLHEP::barn << G4endl; |
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| 115 | } |
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| 116 | return xs; |
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| 117 | } |
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| 118 | |
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| 119 | G4double |
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| 120 | G4CHIPSElasticXS::GetIsoCrossSection(const G4DynamicParticle* p, |
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| 121 | const G4Isotope* iso, |
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| 122 | G4double) |
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| 123 | { |
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| 124 | return GetZandACrossSection(p, iso->GetZ(), iso->GetN()); |
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| 125 | } |
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| 126 | |
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| 127 | G4double |
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| 128 | G4CHIPSElasticXS::GetIsoZACrossSection(const G4DynamicParticle* p, |
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| 129 | G4double ZZ, |
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| 130 | G4double AA, |
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| 131 | G4double) |
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| 132 | { |
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| 133 | return GetZandACrossSection(p, G4int(ZZ), G4int(AA)); |
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| 134 | } |
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| 135 | |
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| 136 | G4double |
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| 137 | G4CHIPSElasticXS::GetZandACrossSection(const G4DynamicParticle* dyn, |
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| 138 | G4int Z, G4int A, G4double) |
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| 139 | { |
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| 140 | G4double momentum = dyn->GetTotalMomentum(); |
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| 141 | |
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| 142 | // only proton, deuteron and He4 x-sections |
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| 143 | G4int N = A - Z; |
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| 144 | if(Z == 1) { |
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| 145 | if(N > 1) { N = 1; } |
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| 146 | } else if(Z == 2) { N = 2; } |
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| 147 | |
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| 148 | G4double x = 0.0; |
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| 149 | if(theParticle == theProton) { |
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| 150 | x = pCManager->GetCrossSection(false,momentum,Z,N,pPDG); |
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| 151 | } else { |
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| 152 | x = nCManager->GetCrossSection(false,momentum,Z,N,pPDG); |
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| 153 | } |
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| 154 | return x; |
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| 155 | } |
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| 156 | |
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| 157 | void |
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| 158 | G4CHIPSElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p) |
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| 159 | { |
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| 160 | if(isInitialized) { return; } |
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| 161 | if(verboseLevel > 0){ |
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| 162 | G4cout << "G4CHIPSElasticXS::BuildPhysicsTable for " |
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| 163 | << p.GetParticleName() |
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| 164 | << " Elow(MeV)= " << thEnergy/MeV |
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| 165 | << G4endl; |
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| 166 | } |
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| 167 | isInitialized = true; |
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| 168 | theParticle = &p; |
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| 169 | if(theParticle != theProton && theParticle != theNeutron) { |
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| 170 | G4cout << "G4CHIPSElasticXS::BuildPhysicsTable ERROR for " |
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| 171 | << p.GetParticleName() |
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| 172 | << G4endl; |
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| 173 | G4Exception("G4CHIPSElasticXS", "", FatalException,"Not applicable"); |
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| 174 | } |
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| 175 | pPDG = theParticle->GetPDGEncoding(); |
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| 176 | } |
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| 177 | |
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| 178 | void |
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| 179 | G4CHIPSElasticXS::DumpPhysicsTable(const G4ParticleDefinition&) |
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| 180 | {} |
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| 181 | |
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