[1058] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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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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[1192] | 26 | // $Id: G4DNAEmfietzoglouExcitationModel.cc,v 1.8 2009/08/13 11:32:47 sincerti Exp $ |
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[1196] | 27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[1058] | 28 | // |
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| 29 | |
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| 30 | #include "G4DNAEmfietzoglouExcitationModel.hh" |
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| 31 | |
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| 32 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 33 | |
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| 34 | using namespace std; |
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| 35 | |
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| 36 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 37 | |
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| 38 | G4DNAEmfietzoglouExcitationModel::G4DNAEmfietzoglouExcitationModel(const G4ParticleDefinition*, |
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| 39 | const G4String& nam) |
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| 40 | :G4VEmModel(nam),isInitialised(false) |
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| 41 | { |
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| 42 | |
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| 43 | lowEnergyLimit = 8.23 * eV; |
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| 44 | highEnergyLimit = 10 * MeV; |
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| 45 | SetLowEnergyLimit(lowEnergyLimit); |
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| 46 | SetHighEnergyLimit(highEnergyLimit); |
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| 47 | |
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| 48 | verboseLevel= 0; |
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| 49 | // Verbosity scale: |
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| 50 | // 0 = nothing |
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| 51 | // 1 = warning for energy non-conservation |
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| 52 | // 2 = details of energy budget |
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| 53 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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| 54 | // 4 = entering in methods |
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| 55 | |
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| 56 | if (verboseLevel > 3) |
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| 57 | |
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[1192] | 58 | if( verboseLevel>0 ) |
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| 59 | { |
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| 60 | G4cout << "Emfietzoglou Excitation model is constructed " << G4endl |
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| 61 | << "Energy range: " |
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| 62 | << lowEnergyLimit / eV << " eV - " |
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| 63 | << highEnergyLimit / MeV << " MeV" |
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| 64 | << G4endl; |
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| 65 | } |
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[1058] | 66 | } |
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| 67 | |
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| 68 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 69 | |
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| 70 | G4DNAEmfietzoglouExcitationModel::~G4DNAEmfietzoglouExcitationModel() |
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| 71 | {} |
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| 72 | |
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| 73 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 74 | |
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| 75 | void G4DNAEmfietzoglouExcitationModel::Initialise(const G4ParticleDefinition* /*particle*/, |
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| 76 | const G4DataVector& /*cuts*/) |
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| 77 | { |
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| 78 | |
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| 79 | if (verboseLevel > 3) |
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| 80 | G4cout << "Calling G4DNAEmfietzoglouExcitationModel::Initialise()" << G4endl; |
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| 81 | |
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| 82 | // Energy limits |
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| 83 | |
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| 84 | if (LowEnergyLimit() < lowEnergyLimit) |
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| 85 | { |
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| 86 | G4cout << "G4DNAEmfietzoglouExcitationModel: low energy limit increased from " << |
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| 87 | LowEnergyLimit()/eV << " eV to " << lowEnergyLimit/eV << " eV" << G4endl; |
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| 88 | SetLowEnergyLimit(lowEnergyLimit); |
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| 89 | } |
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| 90 | |
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| 91 | if (HighEnergyLimit() > highEnergyLimit) |
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| 92 | { |
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| 93 | G4cout << "G4DNAEmfietzoglouExcitationModel: high energy limit decreased from " << |
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| 94 | HighEnergyLimit()/MeV << " MeV to " << highEnergyLimit/MeV << " MeV" << G4endl; |
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| 95 | SetHighEnergyLimit(highEnergyLimit); |
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| 96 | } |
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| 97 | |
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| 98 | // |
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| 99 | |
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| 100 | nLevels = waterExcitation.NumberOfLevels(); |
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| 101 | |
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| 102 | // |
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[1192] | 103 | if( verboseLevel>0 ) |
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| 104 | { |
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| 105 | G4cout << "Emfietzoglou Excitation model is initialized " << G4endl |
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| 106 | << "Energy range: " |
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| 107 | << LowEnergyLimit() / eV << " eV - " |
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| 108 | << HighEnergyLimit() / MeV << " MeV" |
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| 109 | << G4endl; |
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| 110 | } |
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[1058] | 111 | |
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| 112 | if(!isInitialised) |
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| 113 | { |
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| 114 | isInitialised = true; |
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| 115 | |
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| 116 | if(pParticleChange) |
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| 117 | fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange); |
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| 118 | else |
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| 119 | fParticleChangeForGamma = new G4ParticleChangeForGamma(); |
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| 120 | } |
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| 121 | |
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| 122 | // InitialiseElementSelectors(particle,cuts); |
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| 123 | |
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| 124 | // Test if water material |
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| 125 | |
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| 126 | flagMaterialIsWater= false; |
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| 127 | densityWater = 0; |
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| 128 | |
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| 129 | const G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable(); |
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| 130 | |
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| 131 | if(theCoupleTable) |
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| 132 | { |
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| 133 | G4int numOfCouples = theCoupleTable->GetTableSize(); |
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| 134 | |
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| 135 | if(numOfCouples>0) |
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| 136 | { |
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| 137 | for (G4int i=0; i<numOfCouples; i++) |
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| 138 | { |
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| 139 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i); |
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| 140 | const G4Material* material = couple->GetMaterial(); |
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| 141 | |
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[1192] | 142 | if (material->GetName() == "G4_WATER") |
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[1058] | 143 | { |
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[1192] | 144 | G4double density = material->GetAtomicNumDensityVector()[1]; |
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| 145 | flagMaterialIsWater = true; |
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| 146 | densityWater = density; |
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| 147 | |
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| 148 | if (verboseLevel > 3) |
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| 149 | G4cout << "****** Water material is found with density(cm^-3)=" << density/(cm*cm*cm) << G4endl; |
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[1058] | 150 | } |
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| 151 | |
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| 152 | } |
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| 153 | |
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[1192] | 154 | } // if(numOfCouples>0) |
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| 155 | |
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[1058] | 156 | } // if (theCoupleTable) |
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| 157 | |
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| 158 | } |
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| 159 | |
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| 160 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 161 | |
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| 162 | G4double G4DNAEmfietzoglouExcitationModel::CrossSectionPerVolume(const G4Material*, |
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| 163 | const G4ParticleDefinition* particleDefinition, |
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| 164 | G4double ekin, |
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| 165 | G4double, |
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| 166 | G4double) |
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| 167 | { |
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| 168 | if (verboseLevel > 3) |
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| 169 | G4cout << "Calling CrossSectionPerVolume() of G4DNAEmfietzoglouExcitationModel" << G4endl; |
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| 170 | |
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| 171 | // Calculate total cross section for model |
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| 172 | |
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| 173 | G4double sigma=0; |
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| 174 | |
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| 175 | if (flagMaterialIsWater) |
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| 176 | { |
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| 177 | |
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| 178 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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| 179 | { |
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| 180 | if (ekin >= lowEnergyLimit && ekin < highEnergyLimit) |
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| 181 | { |
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| 182 | sigma = Sum(ekin); |
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| 183 | } |
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| 184 | } |
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| 185 | |
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| 186 | if (verboseLevel > 3) |
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| 187 | { |
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| 188 | G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl; |
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| 189 | G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl; |
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| 190 | G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*densityWater/(1./cm) << G4endl; |
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| 191 | } |
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| 192 | |
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| 193 | } // if (flagMaterialIsWater) |
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| 194 | |
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| 195 | return sigma*densityWater; |
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| 196 | } |
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| 197 | |
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| 198 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 199 | |
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| 200 | void G4DNAEmfietzoglouExcitationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/, |
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| 201 | const G4MaterialCutsCouple* /*couple*/, |
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| 202 | const G4DynamicParticle* aDynamicElectron, |
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| 203 | G4double, |
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| 204 | G4double) |
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| 205 | { |
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| 206 | |
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| 207 | if (verboseLevel > 3) |
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| 208 | G4cout << "Calling SampleSecondaries() of G4DNAEmfietzoglouExcitationModel" << G4endl; |
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| 209 | |
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| 210 | G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy(); |
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| 211 | |
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| 212 | G4int level = RandomSelect(electronEnergy0); |
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| 213 | |
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| 214 | G4double excitationEnergy = waterExcitation.ExcitationEnergy(level); |
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| 215 | G4double newEnergy = electronEnergy0 - excitationEnergy; |
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| 216 | |
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| 217 | if (electronEnergy0 < highEnergyLimit) |
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| 218 | { |
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| 219 | if (newEnergy >= lowEnergyLimit) |
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| 220 | { |
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| 221 | fParticleChangeForGamma->ProposeMomentumDirection(aDynamicElectron->GetMomentumDirection()); |
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| 222 | fParticleChangeForGamma->SetProposedKineticEnergy(newEnergy); |
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| 223 | fParticleChangeForGamma->ProposeLocalEnergyDeposit(excitationEnergy); |
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| 224 | } |
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| 225 | |
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| 226 | else |
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| 227 | { |
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| 228 | fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill); |
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| 229 | fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0); |
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| 230 | } |
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| 231 | } |
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| 232 | } |
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| 233 | |
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| 234 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 235 | |
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| 236 | G4double G4DNAEmfietzoglouExcitationModel::PartialCrossSection(G4double t, G4int level) |
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| 237 | { |
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| 238 | // Aj T |
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| 239 | // Sigma(T) = ------------- (Bj / T) ln(Cj ---) [1 - Bj / T]^Pj |
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| 240 | // 2 pi alpha0 R |
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| 241 | // |
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| 242 | // Sigma is the macroscopic cross section = N sigma, where N = number of target particles per unit volume |
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| 243 | // and sigma is the microscopic cross section |
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| 244 | // T is the incoming electron kinetic energy |
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| 245 | // alpha0 is the Bohr Radius (Bohr_radius) |
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| 246 | // Aj, Bj, Cj & Pj are parameters that can be found in Emfietzoglou's papers |
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| 247 | // |
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| 248 | // From Phys. Med. Biol. 48 (2003) 2355-2371, D.Emfietzoglou, |
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| 249 | // Monte Carlo Simulation of the energy loss of low energy electrons in liquid Water |
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| 250 | // |
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| 251 | // Scaling for macroscopic cross section: number of water moleculs per unit volume |
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| 252 | // const G4double sigma0 = (10. / 3.343e22) * cm2; |
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| 253 | |
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| 254 | const G4double density = 3.34192e+19 * mm3; |
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| 255 | |
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| 256 | const G4double aj[]={0.0205, 0.0209, 0.0130, 0.0026, 0.0025}; |
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| 257 | const G4double cj[]={4.9801, 3.3850, 2.8095, 1.9242, 3.4624}; |
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| 258 | const G4double pj[]={0.4757, 0.3483, 0.4443, 0.3429, 0.4379}; |
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| 259 | const G4double r = 13.6 * eV; |
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| 260 | |
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| 261 | G4double sigma = 0.; |
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| 262 | |
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| 263 | G4double exc = waterExcitation.ExcitationEnergy(level); |
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| 264 | |
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| 265 | if (t >= exc) |
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| 266 | { |
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| 267 | G4double excitationSigma = ( aj[level] / (2.*pi*Bohr_radius)) |
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| 268 | * (exc / t) |
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| 269 | * std::log(cj[level]*(t/r)) |
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| 270 | * std::pow((1.- (exc/t)), pj[level]); |
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| 271 | sigma = excitationSigma / density; |
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| 272 | } |
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| 273 | return sigma; |
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| 274 | } |
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| 275 | |
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| 276 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 277 | |
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| 278 | G4int G4DNAEmfietzoglouExcitationModel::RandomSelect(G4double k) |
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| 279 | { |
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| 280 | G4int i = nLevels; |
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| 281 | G4double value = 0.; |
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| 282 | std::deque<double> values; |
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| 283 | |
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| 284 | while (i > 0) |
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| 285 | { |
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| 286 | i--; |
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| 287 | G4double partial = PartialCrossSection(k,i); |
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| 288 | values.push_front(partial); |
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| 289 | value += partial; |
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| 290 | } |
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| 291 | |
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| 292 | value *= G4UniformRand(); |
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| 293 | |
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| 294 | i = nLevels; |
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| 295 | |
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| 296 | while (i > 0) |
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| 297 | { |
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| 298 | i--; |
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| 299 | if (values[i] > value) return i; |
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| 300 | value -= values[i]; |
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| 301 | } |
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| 302 | |
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| 303 | return 0; |
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| 304 | } |
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| 305 | |
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| 306 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 307 | |
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| 308 | G4double G4DNAEmfietzoglouExcitationModel::Sum(G4double k) |
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| 309 | { |
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| 310 | G4double totalCrossSection = 0.; |
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| 311 | |
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| 312 | for (G4int i=0; i<nLevels; i++) |
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| 313 | { |
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| 314 | totalCrossSection += PartialCrossSection(k,i); |
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| 315 | } |
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| 316 | return totalCrossSection; |
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| 317 | } |
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| 318 | |
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