[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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| 27 | // 12.08.06 V.Ivanchenko - first implementation |
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| 28 | // 22.01.07 V.Ivanchenko - add GetIsoZACrossSection |
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| 29 | // 05.03.07 V.Ivanchenko - use G4NucleonNuclearCrossSection |
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| 30 | // 06.03.07 V.Ivanchenko - add Initialise function |
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| 31 | // |
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| 32 | |
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| 33 | #include "G4UElasticCrossSection.hh" |
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| 34 | |
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| 35 | #include "G4ParticleTable.hh" |
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| 36 | #include "G4GlauberGribovCrossSection.hh" |
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| 37 | #include "G4NucleonNuclearCrossSection.hh" |
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| 38 | #include "G4UPiNuclearCrossSection.hh" |
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| 39 | #include "G4HadronCrossSections.hh" |
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| 40 | #include "G4ParticleDefinition.hh" |
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| 41 | #include "G4Element.hh" |
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| 42 | #include "G4Proton.hh" |
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| 43 | #include "G4Neutron.hh" |
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| 44 | #include "G4PionPlus.hh" |
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| 45 | #include "G4PionMinus.hh" |
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| 46 | #include "G4NistManager.hh" |
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| 47 | |
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| 48 | |
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[962] | 49 | G4UElasticCrossSection::G4UElasticCrossSection(const G4ParticleDefinition*) |
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[819] | 50 | { |
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[962] | 51 | verboseLevel = 0; |
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[819] | 52 | hasGlauber = false; |
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[962] | 53 | thEnergy = 90.*GeV; |
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[1347] | 54 | for (G4int i = 0; i < 93; i++) theFac[i] = 0.0; |
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[819] | 55 | fGlauber = new G4GlauberGribovCrossSection(); |
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| 56 | fGheisha = G4HadronCrossSections::Instance(); |
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| 57 | fNucleon = 0; |
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| 58 | fUPi = 0; |
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| 59 | } |
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| 60 | |
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| 61 | |
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| 62 | G4UElasticCrossSection::~G4UElasticCrossSection() |
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| 63 | { |
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| 64 | delete fGlauber; |
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| 65 | if(fNucleon) delete fNucleon; |
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| 66 | if(fUPi) delete fUPi; |
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| 67 | } |
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| 68 | |
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| 69 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 70 | |
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| 71 | G4bool G4UElasticCrossSection::IsApplicable(const G4DynamicParticle* dp, |
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| 72 | const G4Element* elm) |
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| 73 | { |
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[1347] | 74 | return IsIsoApplicable(dp, G4lrint(elm->GetZ()), G4lrint(elm->GetN())); |
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[819] | 75 | } |
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| 76 | |
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| 77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 78 | |
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[1340] | 79 | // G4bool G4UElasticCrossSection::IsZAApplicable(const G4DynamicParticle* dp, |
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| 80 | // G4double Z, G4double A) |
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| 81 | G4bool G4UElasticCrossSection::IsIsoApplicable(const G4DynamicParticle* dp, |
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| 82 | G4int Z, G4int A) |
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[819] | 83 | { |
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| 84 | G4bool res = false; |
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| 85 | if(fNucleon || fUPi) res = true; |
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| 86 | else res = fGheisha->IsApplicable(dp, Z, A); |
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| 87 | if(verboseLevel > 1) |
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| 88 | G4cout << "G4UElasticCrossSection::IsApplicable for " |
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| 89 | << dp->GetDefinition()->GetParticleName() |
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| 90 | << " Ekin(GeV)= " << dp->GetKineticEnergy() |
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| 91 | << G4endl; |
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| 92 | return res; |
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| 93 | } |
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| 94 | |
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| 95 | |
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[1340] | 96 | G4double |
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| 97 | G4UElasticCrossSection::GetCrossSection(const G4DynamicParticle* dp, |
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| 98 | const G4Element* elm, G4double temp) |
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[819] | 99 | { |
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[1340] | 100 | G4int Z = G4lrint(elm->GetZ()); |
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| 101 | G4int N = G4lrint(elm->GetN()); |
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| 102 | |
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| 103 | return GetZandACrossSection(dp, Z, N, temp); |
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[819] | 104 | } |
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| 105 | |
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| 106 | |
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[1340] | 107 | G4double |
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| 108 | G4UElasticCrossSection::GetZandACrossSection(const G4DynamicParticle* dp, |
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| 109 | G4int Z, G4int A, G4double) |
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[819] | 110 | { |
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| 111 | G4double cross = 0.0; |
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| 112 | G4double ekin = dp->GetKineticEnergy(); |
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[1340] | 113 | // G4int iz = G4int(Z); |
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| 114 | if(Z > 92) Z = 92; |
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[819] | 115 | |
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| 116 | // proton and neutron |
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| 117 | if(fNucleon) { |
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[1340] | 118 | if(Z == 1) cross = fGheisha->GetElasticCrossSection(dp, Z, A); |
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[819] | 119 | else if(ekin > thEnergy) { |
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[1340] | 120 | cross = theFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, A); |
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[819] | 121 | } else { |
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| 122 | cross = fNucleon->GetElasticCrossSection(dp, Z, A); |
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| 123 | } |
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| 124 | |
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| 125 | // pions |
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| 126 | } else if(fUPi) { |
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[1340] | 127 | if(Z == 1) cross = fGheisha->GetElasticCrossSection(dp, Z, A); |
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[819] | 128 | else if(ekin > thEnergy) { |
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[1340] | 129 | cross = theFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, A); |
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[819] | 130 | } else { |
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| 131 | cross = fUPi->GetElasticCrossSection(dp, Z, A); |
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| 132 | } |
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| 133 | |
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| 134 | //others |
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| 135 | } else { |
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| 136 | if(hasGlauber && ekin > thEnergy) { |
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[1340] | 137 | cross = theFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, A); |
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[819] | 138 | } else if(fGheisha->IsApplicable(dp, Z, A)) { |
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| 139 | cross = fGheisha->GetElasticCrossSection(dp, Z, A); |
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| 140 | } |
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| 141 | } |
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| 142 | |
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| 143 | if(verboseLevel > 1) |
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| 144 | G4cout << "G4UElasticCrossSection::GetCrossSection for " |
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| 145 | << dp->GetDefinition()->GetParticleName() |
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| 146 | << " Ekin(GeV)= " << dp->GetKineticEnergy() |
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| 147 | << " in nucleus Z= " << Z << " A= " << A |
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| 148 | << " XS(b)= " << cross/barn |
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| 149 | << G4endl; |
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| 150 | |
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| 151 | return cross; |
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| 152 | } |
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| 153 | |
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| 154 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 155 | |
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[962] | 156 | void G4UElasticCrossSection::BuildPhysicsTable(const G4ParticleDefinition& p) |
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[819] | 157 | { |
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[962] | 158 | if(&p == G4Proton::Proton() || &p == G4Neutron::Neutron()) { |
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| 159 | fNucleon = new G4NucleonNuclearCrossSection(); |
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| 160 | } else if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) { |
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| 161 | fUPi = new G4UPiNuclearCrossSection(); |
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| 162 | } |
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| 163 | Initialise(&p); |
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[819] | 164 | } |
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| 165 | |
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| 166 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 167 | |
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| 168 | void G4UElasticCrossSection::DumpPhysicsTable(const G4ParticleDefinition&) |
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| 169 | { |
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| 170 | G4cout << "G4UElasticCrossSection:"<<G4endl; |
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| 171 | } |
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| 172 | |
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| 173 | |
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| 174 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 175 | |
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| 176 | void G4UElasticCrossSection::Initialise(const G4ParticleDefinition* p) |
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| 177 | { |
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| 178 | G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(p); |
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| 179 | G4ThreeVector mom(0.0,0.0,1.0); |
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| 180 | G4DynamicParticle dp(part, mom, thEnergy); |
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| 181 | |
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| 182 | G4NistManager* nist = G4NistManager::Instance(); |
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[1340] | 183 | G4int A = G4lrint(nist->GetAtomicMassAmu(2)); |
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[819] | 184 | |
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[1347] | 185 | if(fGlauber->IsIsoApplicable(&dp, 2, A)) { |
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[819] | 186 | hasGlauber = true; |
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| 187 | |
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| 188 | if(verboseLevel > 0) G4cout << "### G4UElasticCrossSection::Initialise for " |
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| 189 | << p->GetParticleName() << G4endl; |
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| 190 | G4double csup, csdn; |
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| 191 | for(G4int iz=2; iz<93; iz++) { |
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| 192 | |
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| 193 | G4double Z = G4double(iz); |
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[1340] | 194 | A = G4lrint(nist->GetAtomicMassAmu(iz)); |
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| 195 | csup = fGlauber->GetElasticGlauberGribov(&dp, iz, A); |
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[819] | 196 | // proton and neutron |
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| 197 | if(fNucleon) { |
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[1340] | 198 | csdn = fNucleon->GetElasticCrossSection(&dp, iz, A); |
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[819] | 199 | |
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| 200 | // pions |
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| 201 | } else if(fUPi) { |
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[1340] | 202 | csdn = fUPi->GetElasticCrossSection(&dp, iz, A); |
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[819] | 203 | |
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| 204 | // other |
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[1340] | 205 | } else if(fGheisha->IsApplicable(&dp, iz, A)) { |
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| 206 | csdn = fGheisha->GetElasticCrossSection(&dp, iz, A); |
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[819] | 207 | |
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| 208 | } else { |
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| 209 | csdn = csup; |
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| 210 | } |
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| 211 | theFac[iz] = csdn/csup; |
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| 212 | if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A |
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| 213 | << " factor= " << theFac[iz] << G4endl; |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | |
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| 218 | |
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