[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 | // $Id: G4BGGNucleonElasticXS.cc,v 1.1 2007/03/13 15:19:30 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: $ |
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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: G4BGGNucleonElasticXS |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 13.03.2007 |
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| 39 | // Modifications: |
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| 40 | // |
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| 41 | // |
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| 42 | // ------------------------------------------------------------------- |
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| 43 | // |
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| 44 | |
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| 45 | #include "G4BGGNucleonElasticXS.hh" |
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| 46 | #include "G4GlauberGribovCrossSection.hh" |
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| 47 | #include "G4NucleonNuclearCrossSection.hh" |
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| 48 | #include "G4Proton.hh" |
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| 49 | #include "G4Neutron.hh" |
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| 50 | #include "G4NistManager.hh" |
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| 51 | |
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| 52 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 53 | |
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| 54 | G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(const G4ParticleDefinition* p) |
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| 55 | { |
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| 56 | verboseLevel = 0; |
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| 57 | thEnergy = 100.*GeV; |
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| 58 | if(p == G4Proton::Proton() || p == G4Neutron::Neutron()) { |
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| 59 | fNucleon = new G4NucleonNuclearCrossSection(); |
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| 60 | fGlauber = new G4GlauberGribovCrossSection(); |
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| 61 | particle = p; |
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| 62 | Initialise(); |
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| 63 | } else { |
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| 64 | fNucleon = 0; |
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| 65 | fGlauber = 0; |
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| 66 | particle = 0; |
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| 67 | if(p) G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to " |
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| 68 | << p->GetParticleName() |
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| 69 | << G4endl; |
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| 70 | else G4cout << "### G4BGGNucleonElasticXS WARNING: particle is not defined " |
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| 71 | << G4endl; |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 76 | |
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| 77 | G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS() |
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| 78 | { |
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| 79 | delete fGlauber; |
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| 80 | delete fNucleon; |
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| 81 | } |
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| 82 | |
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| 83 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 84 | |
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| 85 | G4double G4BGGNucleonElasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp, |
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| 86 | G4double Z, |
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| 87 | G4double A, |
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| 88 | G4double) |
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| 89 | { |
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| 90 | G4double cross = 0.0; |
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| 91 | G4double ekin = dp->GetKineticEnergy(); |
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| 92 | G4int iz = G4int(Z + 0.5); |
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| 93 | if(iz > 92) iz = 92; |
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| 94 | |
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| 95 | if(ekin > thEnergy) { |
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| 96 | cross = theFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A); |
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| 97 | } else { |
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| 98 | cross = fNucleon->GetIsoZACrossSection(dp, Z, A); |
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| 99 | } |
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| 100 | |
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| 101 | if(verboseLevel > 1) |
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| 102 | G4cout << "G4BGGNucleonElasticXS::GetCrossSection for " |
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| 103 | << dp->GetDefinition()->GetParticleName() |
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| 104 | << " Ekin(GeV)= " << dp->GetKineticEnergy() |
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| 105 | << " in nucleus Z= " << Z << " A= " << A |
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| 106 | << " XS(b)= " << cross/barn |
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| 107 | << G4endl; |
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| 108 | |
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| 109 | return cross; |
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| 110 | } |
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| 111 | |
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| 112 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 113 | |
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| 114 | void G4BGGNucleonElasticXS::BuildPhysicsTable(const G4ParticleDefinition&) |
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| 115 | { |
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| 116 | } |
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| 117 | |
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| 118 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 119 | |
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| 120 | void G4BGGNucleonElasticXS::DumpPhysicsTable(const G4ParticleDefinition&) |
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| 121 | { |
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| 122 | G4cout << "G4BGGNucleonElasticXS:"<<G4endl; |
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| 123 | } |
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| 124 | |
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| 125 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 126 | |
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| 127 | void G4BGGNucleonElasticXS::Initialise() |
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| 128 | { |
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| 129 | G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle); |
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| 130 | G4ThreeVector mom(0.0,0.0,1.0); |
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| 131 | G4DynamicParticle dp(part, mom, thEnergy); |
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| 132 | |
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| 133 | G4NistManager* nist = G4NistManager::Instance(); |
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| 134 | G4double A = nist->GetAtomicMassAmu(2); |
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| 135 | |
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| 136 | G4double csup, csdn; |
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| 137 | |
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| 138 | if(verboseLevel > 0) G4cout << "### G4BGGNucleonElasticXS::Initialise for " |
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| 139 | << particle->GetParticleName() << G4endl; |
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| 140 | |
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| 141 | for(G4int iz=2; iz<93; iz++) { |
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| 142 | |
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| 143 | G4double Z = G4double(iz); |
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| 144 | A = nist->GetAtomicMassAmu(iz); |
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| 145 | |
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| 146 | csup = fGlauber->GetElasticGlauberGribov(&dp, Z, A); |
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| 147 | csdn = fNucleon->GetIsoZACrossSection(&dp, Z, A); |
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| 148 | |
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| 149 | theFac[iz] = csdn/csup; |
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| 150 | if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A |
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| 151 | << " factor= " << theFac[iz] << G4endl; |
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| 152 | } |
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| 153 | } |
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| 154 | |
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| 155 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 156 | |
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| 157 | |
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