[968] | 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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[1055] | 26 | // $Id: G4LivermorePhotoElectricModel.cc,v 1.7 2009/04/18 18:29:34 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-03-beta-cand-01 $ |
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[968] | 28 | // |
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[1055] | 29 | // |
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| 30 | // Author: Sebastien Inserti |
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| 31 | // 30 October 2008 |
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| 32 | // |
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| 33 | // History: |
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| 34 | // -------- |
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| 35 | // 15 Apr 2009 V Ivanchenko Cleanup initialisation and generation of secondaries: |
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| 36 | // - apply internal high-energy limit only in constructor |
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| 37 | // - do not apply low-energy limit (default is 0) |
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| 38 | // - remove GetMeanFreePath method and table |
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| 39 | // - simplify sampling of deexcitation by using cut in energy |
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| 40 | // - added protection against numerical problem in energy sampling |
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| 41 | // - use G4ElementSelector |
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[968] | 42 | |
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| 43 | #include "G4LivermorePhotoElectricModel.hh" |
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| 44 | |
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| 45 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 46 | |
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| 47 | using namespace std; |
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| 48 | |
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| 49 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 50 | |
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| 51 | G4LivermorePhotoElectricModel::G4LivermorePhotoElectricModel(const G4ParticleDefinition*, |
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| 52 | const G4String& nam) |
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[1055] | 53 | :G4VEmModel(nam),isInitialised(false),meanFreePathTable(0), |
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| 54 | crossSectionHandler(0),shellCrossSectionHandler(0),ElectronAngularGenerator(0) |
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[968] | 55 | { |
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[1055] | 56 | lowEnergyLimit = 250 * eV; |
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[968] | 57 | highEnergyLimit = 100 * GeV; |
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[1055] | 58 | // SetLowEnergyLimit(lowEnergyLimit); |
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[968] | 59 | SetHighEnergyLimit(highEnergyLimit); |
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[1055] | 60 | |
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| 61 | ActivateAuger(false); |
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| 62 | |
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[968] | 63 | verboseLevel= 0; |
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| 64 | // Verbosity scale: |
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| 65 | // 0 = nothing |
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| 66 | // 1 = warning for energy non-conservation |
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| 67 | // 2 = details of energy budget |
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| 68 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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| 69 | // 4 = entering in methods |
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[1055] | 70 | if(verboseLevel>0) { |
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| 71 | G4cout << "Livermore PhotoElectric is constructed " << G4endl |
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| 72 | << "Energy range: " |
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| 73 | << lowEnergyLimit / eV << " eV - " |
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| 74 | << highEnergyLimit / GeV << " GeV" |
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| 75 | << G4endl; |
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| 76 | } |
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[968] | 77 | } |
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| 78 | |
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| 79 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 80 | |
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| 81 | G4LivermorePhotoElectricModel::~G4LivermorePhotoElectricModel() |
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| 82 | { |
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[1055] | 83 | if (crossSectionHandler) delete crossSectionHandler; |
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| 84 | if (shellCrossSectionHandler) delete shellCrossSectionHandler; |
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| 85 | if (ElectronAngularGenerator) delete ElectronAngularGenerator; |
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[968] | 86 | } |
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| 87 | |
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| 88 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 89 | |
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[1055] | 90 | void |
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| 91 | G4LivermorePhotoElectricModel::Initialise(const G4ParticleDefinition*, |
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| 92 | const G4DataVector&) |
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[968] | 93 | { |
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| 94 | if (verboseLevel > 3) |
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| 95 | G4cout << "Calling G4LivermorePhotoElectricModel::Initialise()" << G4endl; |
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| 96 | |
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[1055] | 97 | if (crossSectionHandler) |
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[968] | 98 | { |
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[1055] | 99 | crossSectionHandler->Clear(); |
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| 100 | delete crossSectionHandler; |
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[968] | 101 | } |
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[1055] | 102 | |
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| 103 | if (shellCrossSectionHandler) |
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[968] | 104 | { |
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[1055] | 105 | shellCrossSectionHandler->Clear(); |
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| 106 | delete shellCrossSectionHandler; |
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[968] | 107 | } |
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[1055] | 108 | |
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[968] | 109 | // Read data tables for all materials |
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| 110 | |
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| 111 | crossSectionHandler = new G4CrossSectionHandler(); |
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| 112 | crossSectionHandler->Clear(); |
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| 113 | G4String crossSectionFile = "phot/pe-cs-"; |
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| 114 | crossSectionHandler->LoadData(crossSectionFile); |
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| 115 | |
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| 116 | shellCrossSectionHandler = new G4CrossSectionHandler(); |
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| 117 | shellCrossSectionHandler->Clear(); |
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| 118 | G4String shellCrossSectionFile = "phot/pe-ss-cs-"; |
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| 119 | shellCrossSectionHandler->LoadShellData(shellCrossSectionFile); |
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| 120 | |
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[1055] | 121 | // SI - Simple generator is buggy |
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[968] | 122 | //generatorName = "geant4.6.2"; |
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| 123 | //ElectronAngularGenerator = new G4PhotoElectricAngularGeneratorSimple("GEANTSimpleGenerator"); // default generator |
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[1055] | 124 | ElectronAngularGenerator = |
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| 125 | new G4PhotoElectricAngularGeneratorSauterGavrila("GEANTSauterGavrilaGenerator"); |
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[968] | 126 | |
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[1055] | 127 | // |
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[968] | 128 | if (verboseLevel > 2) |
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| 129 | G4cout << "Loaded cross section files for Livermore PhotoElectric model" << G4endl; |
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| 130 | |
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[1055] | 131 | // InitialiseElementSelectors(particle,cuts); |
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[968] | 132 | |
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[1055] | 133 | if (verboseLevel > 0) { |
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| 134 | G4cout << "Livermore PhotoElectric model is initialized " << G4endl |
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| 135 | << "Energy range: " |
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| 136 | << LowEnergyLimit() / eV << " eV - " |
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| 137 | << HighEnergyLimit() / GeV << " GeV" |
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| 138 | << G4endl; |
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| 139 | } |
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| 140 | |
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[968] | 141 | if(isInitialised) return; |
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[1055] | 142 | fParticleChange = GetParticleChangeForGamma(); |
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[968] | 143 | isInitialised = true; |
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| 144 | } |
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| 145 | |
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| 146 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 147 | |
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| 148 | G4double G4LivermorePhotoElectricModel::ComputeCrossSectionPerAtom( |
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| 149 | const G4ParticleDefinition*, |
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| 150 | G4double GammaEnergy, |
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| 151 | G4double Z, G4double, |
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| 152 | G4double, G4double) |
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| 153 | { |
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| 154 | if (verboseLevel > 3) |
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[1055] | 155 | G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermorePhotoElectricModel" |
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| 156 | << G4endl; |
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[968] | 157 | |
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[1055] | 158 | if (GammaEnergy < lowEnergyLimit || GammaEnergy > highEnergyLimit) |
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| 159 | return 0; |
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| 160 | |
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[968] | 161 | G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy); |
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| 162 | return cs; |
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| 163 | } |
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| 164 | |
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| 165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 166 | |
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[1055] | 167 | void |
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| 168 | G4LivermorePhotoElectricModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
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| 169 | const G4MaterialCutsCouple* couple, |
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| 170 | const G4DynamicParticle* aDynamicGamma, |
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| 171 | G4double, |
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| 172 | G4double) |
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[968] | 173 | { |
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| 174 | |
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| 175 | // Fluorescence generated according to: |
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| 176 | // J. Stepanek ,"A program to determine the radiation spectra due to a single atomic |
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| 177 | // subshell ionisation by a particle or due to deexcitation or decay of radionuclides", |
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| 178 | // Comp. Phys. Comm. 1206 pp 1-1-9 (1997) |
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| 179 | |
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| 180 | if (verboseLevel > 3) |
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| 181 | G4cout << "Calling SampleSecondaries() of G4LivermorePhotoElectricModel" << G4endl; |
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| 182 | |
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| 183 | G4double photonEnergy = aDynamicGamma->GetKineticEnergy(); |
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| 184 | |
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[1055] | 185 | // kill incident photon |
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| 186 | fParticleChange->SetProposedKineticEnergy(0.); |
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| 187 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
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| 188 | |
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| 189 | // low-energy gamma is absorpted by this process |
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[968] | 190 | if (photonEnergy <= lowEnergyLimit) |
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| 191 | { |
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| 192 | fParticleChange->ProposeLocalEnergyDeposit(photonEnergy); |
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[1055] | 193 | return; |
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[968] | 194 | } |
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| 195 | |
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[1055] | 196 | // Returns the normalized direction of the momentum |
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| 197 | G4ThreeVector photonDirection = aDynamicGamma->GetMomentumDirection(); |
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[968] | 198 | |
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| 199 | // Select randomly one element in the current material |
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[1055] | 200 | // G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy); |
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| 201 | const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition(); |
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| 202 | const G4Element* elm = SelectRandomAtom(couple->GetMaterial(),particle,photonEnergy); |
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| 203 | G4int Z = (G4int)elm->GetZ(); |
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[968] | 204 | |
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| 205 | // Select the ionised shell in the current atom according to shell cross sections |
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| 206 | size_t shellIndex = shellCrossSectionHandler->SelectRandomShell(Z,photonEnergy); |
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| 207 | |
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| 208 | // Retrieve the corresponding identifier and binding energy of the selected shell |
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| 209 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
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| 210 | const G4AtomicShell* shell = transitionManager->Shell(Z,shellIndex); |
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| 211 | G4double bindingEnergy = shell->BindingEnergy(); |
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| 212 | G4int shellId = shell->ShellId(); |
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| 213 | |
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| 214 | // Primary outcoming electron |
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| 215 | G4double eKineticEnergy = photonEnergy - bindingEnergy; |
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| 216 | |
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| 217 | // There may be cases where the binding energy of the selected shell is > photon energy |
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| 218 | // In such cases do not generate secondaries |
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| 219 | if (eKineticEnergy > 0.) |
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| 220 | { |
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[1055] | 221 | // Calculate direction of the photoelectron |
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| 222 | G4ThreeVector gammaPolarization = aDynamicGamma->GetPolarization(); |
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| 223 | G4ThreeVector electronDirection = |
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| 224 | ElectronAngularGenerator->GetPhotoElectronDirection(photonDirection, |
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| 225 | eKineticEnergy, |
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| 226 | gammaPolarization, |
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| 227 | shellId); |
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[968] | 228 | |
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[1055] | 229 | // The electron is created ... |
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| 230 | G4DynamicParticle* electron = new G4DynamicParticle (G4Electron::Electron(), |
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| 231 | electronDirection, |
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| 232 | eKineticEnergy); |
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| 233 | fvect->push_back(electron); |
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[968] | 234 | } |
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| 235 | else |
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| 236 | { |
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| 237 | bindingEnergy = photonEnergy; |
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| 238 | } |
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| 239 | |
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[1055] | 240 | // deexcitation |
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| 241 | if(DeexcitationFlag() && Z > 5) { |
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[968] | 242 | |
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[1055] | 243 | const G4ProductionCutsTable* theCoupleTable= |
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| 244 | G4ProductionCutsTable::GetProductionCutsTable(); |
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[968] | 245 | |
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[1055] | 246 | size_t index = couple->GetIndex(); |
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| 247 | G4double cutg = (*(theCoupleTable->GetEnergyCutsVector(0)))[index]; |
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| 248 | G4double cute = (*(theCoupleTable->GetEnergyCutsVector(1)))[index]; |
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[968] | 249 | |
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[1055] | 250 | // Generation of fluorescence |
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| 251 | // Data in EADL are available only for Z > 5 |
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| 252 | // Protection to avoid generating photons in the unphysical case of |
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| 253 | // shell binding energy > photon energy |
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| 254 | if (bindingEnergy > cutg || bindingEnergy > cute) |
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| 255 | { |
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| 256 | G4DynamicParticle* aPhoton; |
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| 257 | deexcitationManager.SetCutForSecondaryPhotons(cutg); |
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| 258 | deexcitationManager.SetCutForAugerElectrons(cute); |
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| 259 | |
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| 260 | std::vector<G4DynamicParticle*>* photonVector = |
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| 261 | deexcitationManager.GenerateParticles(Z,shellId); |
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| 262 | size_t nTotPhotons = photonVector->size(); |
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| 263 | for (size_t k=0; k<nTotPhotons; k++) |
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| 264 | { |
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| 265 | aPhoton = (*photonVector)[k]; |
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| 266 | if (aPhoton) |
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| 267 | { |
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| 268 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
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| 269 | if (itsEnergy <= bindingEnergy) |
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| 270 | { |
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| 271 | // Local energy deposit is given as the sum of the |
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| 272 | // energies of incident photons minus the energies |
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| 273 | // of the outcoming fluorescence photons |
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| 274 | bindingEnergy -= itsEnergy; |
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| 275 | fvect->push_back(aPhoton); |
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| 276 | } |
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| 277 | else |
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| 278 | { |
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| 279 | // abnormal case of energy non-conservation |
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| 280 | delete aPhoton; |
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| 281 | (*photonVector)[k] = 0; |
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| 282 | } |
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| 283 | } |
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| 284 | } |
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| 285 | delete photonVector; |
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[968] | 286 | } |
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[1055] | 287 | } |
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| 288 | // excitation energy left |
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| 289 | fParticleChange->ProposeLocalEnergyDeposit(bindingEnergy); |
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[968] | 290 | } |
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| 291 | |
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| 292 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 293 | |
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| 294 | void G4LivermorePhotoElectricModel::SetCutForLowEnSecPhotons(G4double cut) |
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| 295 | { |
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| 296 | cutForLowEnergySecondaryPhotons = cut; |
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| 297 | deexcitationManager.SetCutForSecondaryPhotons(cut); |
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| 298 | } |
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| 299 | |
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| 300 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 301 | |
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| 302 | void G4LivermorePhotoElectricModel::SetCutForLowEnSecElectrons(G4double cut) |
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| 303 | { |
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| 304 | cutForLowEnergySecondaryElectrons = cut; |
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| 305 | deexcitationManager.SetCutForAugerElectrons(cut); |
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| 306 | } |
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| 307 | |
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| 308 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 309 | |
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| 310 | void G4LivermorePhotoElectricModel::ActivateAuger(G4bool val) |
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| 311 | { |
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| 312 | deexcitationManager.ActivateAugerElectronProduction(val); |
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| 313 | } |
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| 314 | |
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| 315 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 316 | |
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[1055] | 317 | void |
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| 318 | G4LivermorePhotoElectricModel::SetAngularGenerator(G4VPhotoElectricAngularDistribution* dist) |
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[968] | 319 | { |
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[1055] | 320 | ElectronAngularGenerator = dist; |
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[968] | 321 | ElectronAngularGenerator->PrintGeneratorInformation(); |
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| 322 | } |
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| 323 | |
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| 324 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 325 | |
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| 326 | void G4LivermorePhotoElectricModel::SetAngularGenerator(const G4String& name) |
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| 327 | { |
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| 328 | if (name == "default") |
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| 329 | { |
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| 330 | delete ElectronAngularGenerator; |
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[1055] | 331 | ElectronAngularGenerator = |
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| 332 | new G4PhotoElectricAngularGeneratorSimple("GEANT4LowEnergySimpleGenerator"); |
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[968] | 333 | generatorName = name; |
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| 334 | } |
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| 335 | else if (name == "standard") |
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| 336 | { |
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| 337 | delete ElectronAngularGenerator; |
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[1055] | 338 | ElectronAngularGenerator = |
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| 339 | new G4PhotoElectricAngularGeneratorSauterGavrila("GEANT4SauterGavrilaGenerator"); |
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[968] | 340 | generatorName = name; |
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| 341 | } |
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| 342 | else if (name == "polarized") |
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| 343 | { |
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| 344 | delete ElectronAngularGenerator; |
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[1055] | 345 | ElectronAngularGenerator = |
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| 346 | new G4PhotoElectricAngularGeneratorPolarized("GEANT4LowEnergyPolarizedGenerator"); |
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[968] | 347 | generatorName = name; |
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| 348 | } |
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| 349 | else |
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| 350 | { |
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| 351 | G4Exception("G4LowEnergyPhotoElectric::SetAngularGenerator - generator does not exist"); |
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| 352 | } |
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| 353 | |
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| 354 | ElectronAngularGenerator->PrintGeneratorInformation(); |
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| 355 | } |
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| 356 | |
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