[1316] | 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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[1340] | 26 | // $Id: G4Penelope08PhotoElectricModel.cc,v 1.5 2010/07/28 07:09:16 pandola Exp $ |
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| 27 | // GEANT4 tag $Name: emlowen-V09-03-54 $ |
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[1316] | 28 | // |
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| 29 | // Author: Luciano Pandola |
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| 30 | // |
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| 31 | // History: |
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| 32 | // -------- |
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| 33 | // 08 Jan 2010 L Pandola First implementation |
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| 34 | |
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| 35 | #include "G4Penelope08PhotoElectricModel.hh" |
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| 36 | #include "G4ParticleDefinition.hh" |
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| 37 | #include "G4MaterialCutsCouple.hh" |
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| 38 | #include "G4ProductionCutsTable.hh" |
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| 39 | #include "G4DynamicParticle.hh" |
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| 40 | #include "G4PhysicsTable.hh" |
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| 41 | #include "G4PhysicsFreeVector.hh" |
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| 42 | #include "G4ElementTable.hh" |
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| 43 | #include "G4Element.hh" |
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| 44 | #include "G4AtomicTransitionManager.hh" |
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| 45 | #include "G4AtomicShell.hh" |
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| 46 | #include "G4Gamma.hh" |
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| 47 | #include "G4Electron.hh" |
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| 48 | |
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| 49 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 50 | |
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| 51 | |
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| 52 | G4Penelope08PhotoElectricModel::G4Penelope08PhotoElectricModel(const G4ParticleDefinition*, |
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| 53 | const G4String& nam) |
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| 54 | :G4VEmModel(nam),isInitialised(false),logAtomicShellXS(0) |
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| 55 | { |
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| 56 | fIntrinsicLowEnergyLimit = 100.0*eV; |
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| 57 | fIntrinsicHighEnergyLimit = 100.0*GeV; |
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| 58 | // SetLowEnergyLimit(fIntrinsicLowEnergyLimit); |
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| 59 | SetHighEnergyLimit(fIntrinsicHighEnergyLimit); |
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| 60 | // |
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| 61 | verboseLevel= 0; |
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| 62 | // Verbosity scale: |
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| 63 | // 0 = nothing |
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| 64 | // 1 = warning for energy non-conservation |
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| 65 | // 2 = details of energy budget |
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| 66 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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| 67 | // 4 = entering in methods |
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| 68 | |
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| 69 | //by default the model will inkove the atomic deexcitation |
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| 70 | SetDeexcitationFlag(true); |
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| 71 | ActivateAuger(false); |
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| 72 | } |
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| 73 | |
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| 74 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 75 | |
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| 76 | G4Penelope08PhotoElectricModel::~G4Penelope08PhotoElectricModel() |
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| 77 | { |
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| 78 | std::map <const G4int,G4PhysicsTable*>::iterator i; |
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| 79 | if (logAtomicShellXS) |
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| 80 | { |
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| 81 | for (i=logAtomicShellXS->begin();i != logAtomicShellXS->end();i++) |
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| 82 | { |
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| 83 | G4PhysicsTable* tab = i->second; |
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| 84 | tab->clearAndDestroy(); |
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| 85 | delete tab; |
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| 86 | } |
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| 87 | } |
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| 88 | delete logAtomicShellXS; |
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| 89 | } |
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| 90 | |
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| 91 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 92 | |
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| 93 | void G4Penelope08PhotoElectricModel::Initialise(const G4ParticleDefinition* particle, |
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| 94 | const G4DataVector& cuts) |
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| 95 | { |
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| 96 | if (verboseLevel > 3) |
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| 97 | G4cout << "Calling G4Penelope08PhotoElectricModel::Initialise()" << G4endl; |
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| 98 | |
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| 99 | // logAtomicShellXS is created only once, since it is never cleared |
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| 100 | if (!logAtomicShellXS) |
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| 101 | logAtomicShellXS = new std::map<const G4int,G4PhysicsTable*>; |
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| 102 | |
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| 103 | InitialiseElementSelectors(particle,cuts); |
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| 104 | |
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| 105 | if (verboseLevel > 0) { |
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| 106 | G4cout << "Penelope Photo-Electric model is initialized " << G4endl |
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| 107 | << "Energy range: " |
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| 108 | << LowEnergyLimit() / MeV << " MeV - " |
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| 109 | << HighEnergyLimit() / GeV << " GeV" |
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| 110 | << G4endl; |
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| 111 | } |
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| 112 | |
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| 113 | if(isInitialised) return; |
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| 114 | fParticleChange = GetParticleChangeForGamma(); |
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| 115 | isInitialised = true; |
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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 | G4double G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom( |
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| 121 | const G4ParticleDefinition*, |
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| 122 | G4double energy, |
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| 123 | G4double Z, G4double, |
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| 124 | G4double, G4double) |
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| 125 | { |
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| 126 | // |
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| 127 | // Penelope model. |
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| 128 | // |
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| 129 | |
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| 130 | if (verboseLevel > 3) |
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| 131 | G4cout << "Calling ComputeCrossSectionPerAtom() of G4Penelope08PhotoElectricModel" << G4endl; |
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| 132 | |
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| 133 | G4int iZ = (G4int) Z; |
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| 134 | |
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| 135 | //read data files |
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| 136 | if (!logAtomicShellXS->count(iZ)) |
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| 137 | ReadDataFile(iZ); |
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| 138 | //now it should be ok |
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| 139 | if (!logAtomicShellXS->count(iZ)) |
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| 140 | { |
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| 141 | G4cout << "Problem in G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom" |
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| 142 | << G4endl; |
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| 143 | G4Exception(); |
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| 144 | } |
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| 145 | |
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| 146 | G4double cross = 0; |
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| 147 | |
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| 148 | G4PhysicsTable* theTable = logAtomicShellXS->find(iZ)->second; |
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| 149 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[0]; |
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| 150 | |
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| 151 | if (!totalXSLog) |
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| 152 | { |
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| 153 | G4cout << "Problem in G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom" |
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| 154 | << G4endl; |
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| 155 | G4Exception(); |
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| 156 | } |
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[1337] | 157 | G4double logene = std::log(energy); |
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[1316] | 158 | G4double logXS = totalXSLog->Value(logene); |
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[1337] | 159 | cross = std::exp(logXS); |
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[1316] | 160 | |
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| 161 | if (verboseLevel > 2) |
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| 162 | G4cout << "Photoelectric cross section at " << energy/MeV << " MeV for Z=" << Z << |
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| 163 | " = " << cross/barn << " barn" << G4endl; |
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| 164 | return cross; |
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| 165 | } |
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| 166 | |
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| 167 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 168 | |
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| 169 | void G4Penelope08PhotoElectricModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
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| 170 | const G4MaterialCutsCouple* couple, |
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| 171 | const G4DynamicParticle* aDynamicGamma, |
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| 172 | G4double, |
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| 173 | G4double) |
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| 174 | { |
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| 175 | // |
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| 176 | // Photoelectric effect, Penelope model |
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| 177 | // |
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| 178 | // The target atom and the target shell are sampled according to the Livermore |
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| 179 | // database |
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| 180 | // D.E. Cullen et al., Report UCRL-50400 (1989) |
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| 181 | // The angular distribution of the electron in the final state is sampled |
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| 182 | // according to the Sauter distribution from |
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| 183 | // F. Sauter, Ann. Phys. 11 (1931) 454 |
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| 184 | // The energy of the final electron is given by the initial photon energy minus |
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| 185 | // the binding energy. Fluorescence de-excitation is subsequently produced |
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| 186 | // (to fill the vacancy) according to the general Geant4 G4DeexcitationManager: |
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| 187 | // J. Stepanek, Comp. Phys. Comm. 1206 pp 1-1-9 (1997) |
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| 188 | |
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| 189 | if (verboseLevel > 3) |
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| 190 | G4cout << "Calling SamplingSecondaries() of G4Penelope08PhotoElectricModel" << G4endl; |
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| 191 | |
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| 192 | G4double photonEnergy = aDynamicGamma->GetKineticEnergy(); |
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| 193 | |
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| 194 | // always kill primary |
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| 195 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
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| 196 | fParticleChange->SetProposedKineticEnergy(0.); |
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| 197 | |
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| 198 | if (photonEnergy <= fIntrinsicLowEnergyLimit) |
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| 199 | { |
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| 200 | fParticleChange->ProposeLocalEnergyDeposit(photonEnergy); |
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| 201 | return ; |
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| 202 | } |
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| 203 | |
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| 204 | G4ParticleMomentum photonDirection = aDynamicGamma->GetMomentumDirection(); |
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| 205 | |
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| 206 | // Select randomly one element in the current material |
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| 207 | if (verboseLevel > 2) |
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| 208 | G4cout << "Going to select element in " << couple->GetMaterial()->GetName() << G4endl; |
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| 209 | |
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| 210 | // atom can be selected efficiently if element selectors are initialised |
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| 211 | const G4Element* anElement = |
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| 212 | SelectRandomAtom(couple,G4Gamma::GammaDefinition(),photonEnergy); |
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| 213 | G4int Z = (G4int) anElement->GetZ(); |
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| 214 | if (verboseLevel > 2) |
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| 215 | G4cout << "Selected " << anElement->GetName() << G4endl; |
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| 216 | |
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| 217 | // Select the ionised shell in the current atom according to shell cross sections |
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| 218 | //shellIndex = 0 --> K shell |
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| 219 | // 1-3 --> L shells |
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| 220 | // 4-8 --> M shells |
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| 221 | // 9 --> outer shells cumulatively |
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| 222 | // |
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| 223 | size_t shellIndex = SelectRandomShell(Z,photonEnergy); |
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| 224 | |
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| 225 | if (verboseLevel > 2) |
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| 226 | G4cout << "Selected shell " << shellIndex << " of element " << anElement->GetName() << G4endl; |
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| 227 | |
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| 228 | // Retrieve the corresponding identifier and binding energy of the selected shell |
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| 229 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
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| 230 | |
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| 231 | //The number of shell cross section possibly reported in the Penelope database |
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| 232 | //might be different from the number of shells in the G4AtomicTransitionManager |
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| 233 | //(namely, Penelope may contain more shell, especially for very light elements). |
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| 234 | //In order to avoid a warning message from the G4AtomicTransitionManager, I |
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| 235 | //add this protection. Results are anyway changed, because when G4AtomicTransitionManager |
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| 236 | //has a shellID>maxID, it sets the shellID to the last valid shell. |
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| 237 | size_t numberOfShells = (size_t) transitionManager->NumberOfShells(Z); |
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| 238 | if (shellIndex >= numberOfShells) |
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| 239 | shellIndex = numberOfShells-1; |
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| 240 | |
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| 241 | const G4AtomicShell* shell = transitionManager->Shell(Z,shellIndex); |
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| 242 | G4double bindingEnergy = shell->BindingEnergy(); |
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| 243 | G4int shellId = shell->ShellId(); |
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| 244 | |
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| 245 | //Penelope considers only K, L and M shells. Cross sections of outer shells are |
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| 246 | //not included in the Penelope database. If SelectRandomShell() returns |
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| 247 | //shellIndex = 9, it means that an outer shell was ionized. In this case the |
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| 248 | //Penelope recipe is to set bindingEnergy = 0 (the energy is entirely assigned |
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| 249 | //to the electron) and to disregard fluorescence. |
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| 250 | if (shellIndex == 9) |
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| 251 | bindingEnergy = 0.*eV; |
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| 252 | |
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| 253 | |
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| 254 | G4double localEnergyDeposit = 0.0; |
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| 255 | G4double cosTheta = 1.0; |
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| 256 | |
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| 257 | // Primary outcoming electron |
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| 258 | G4double eKineticEnergy = photonEnergy - bindingEnergy; |
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| 259 | |
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| 260 | // There may be cases where the binding energy of the selected shell is > photon energy |
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| 261 | // In such cases do not generate secondaries |
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| 262 | if (eKineticEnergy > 0.) |
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| 263 | { |
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| 264 | // The electron is created |
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| 265 | // Direction sampled from the Sauter distribution |
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| 266 | cosTheta = SampleElectronDirection(eKineticEnergy); |
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| 267 | G4double sinTheta = std::sqrt(1-cosTheta*cosTheta); |
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| 268 | G4double phi = twopi * G4UniformRand() ; |
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| 269 | G4double dirx = sinTheta * std::cos(phi); |
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| 270 | G4double diry = sinTheta * std::sin(phi); |
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| 271 | G4double dirz = cosTheta ; |
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| 272 | G4ThreeVector electronDirection(dirx,diry,dirz); //electron direction |
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| 273 | electronDirection.rotateUz(photonDirection); |
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| 274 | G4DynamicParticle* electron = new G4DynamicParticle (G4Electron::Electron(), |
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| 275 | electronDirection, |
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| 276 | eKineticEnergy); |
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| 277 | fvect->push_back(electron); |
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| 278 | } |
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| 279 | else |
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| 280 | { |
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| 281 | bindingEnergy = photonEnergy; |
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| 282 | } |
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| 283 | |
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| 284 | G4double energyInFluorescence = 0; //testing purposes |
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| 285 | |
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| 286 | //Now, take care of fluorescence, if required |
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| 287 | if(DeexcitationFlag() && Z > 5) |
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| 288 | { |
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| 289 | const G4ProductionCutsTable* theCoupleTable= |
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| 290 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 291 | size_t indx = couple->GetIndex(); |
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| 292 | G4double cutG = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx]; |
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| 293 | G4double cutE = (*(theCoupleTable->GetEnergyCutsVector(1)))[indx]; |
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| 294 | |
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| 295 | // Protection to avoid generating photons in the unphysical case of |
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| 296 | // shell binding energy > photon energy |
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| 297 | if (bindingEnergy > cutG || bindingEnergy > cutE) |
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| 298 | { |
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| 299 | deexcitationManager.SetCutForSecondaryPhotons(cutG); |
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| 300 | deexcitationManager.SetCutForAugerElectrons(cutE); |
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| 301 | std::vector<G4DynamicParticle*>* photonVector = |
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| 302 | deexcitationManager.GenerateParticles(Z,shellId); |
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| 303 | //Check for secondaries |
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| 304 | if(photonVector) |
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| 305 | { |
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| 306 | for (size_t k=0; k< photonVector->size(); k++) |
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| 307 | { |
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| 308 | G4DynamicParticle* aPhoton = (*photonVector)[k]; |
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| 309 | if (aPhoton) |
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| 310 | { |
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| 311 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
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| 312 | if (itsEnergy <= bindingEnergy) |
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| 313 | { |
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| 314 | if(aPhoton->GetDefinition() == G4Gamma::Gamma()) |
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| 315 | energyInFluorescence += itsEnergy; |
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| 316 | bindingEnergy -= itsEnergy; |
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| 317 | fvect->push_back(aPhoton); |
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| 318 | } |
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| 319 | else |
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| 320 | { |
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| 321 | delete aPhoton; |
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| 322 | (*photonVector)[k] = 0; |
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| 323 | } |
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| 324 | } |
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| 325 | } |
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| 326 | delete photonVector; |
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| 327 | } |
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| 328 | } |
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| 329 | } |
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| 330 | //Residual energy is deposited locally |
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| 331 | localEnergyDeposit += bindingEnergy; |
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| 332 | |
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| 333 | if (localEnergyDeposit < 0) |
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| 334 | { |
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| 335 | G4cout << "WARNING - " |
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| 336 | << "G4Penelope08PhotoElectric::PostStepDoIt - Negative energy deposit" |
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| 337 | << G4endl; |
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| 338 | localEnergyDeposit = 0; |
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| 339 | } |
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| 340 | |
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| 341 | fParticleChange->ProposeLocalEnergyDeposit(localEnergyDeposit); |
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| 342 | |
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| 343 | if (verboseLevel > 1) |
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| 344 | { |
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| 345 | G4cout << "-----------------------------------------------------------" << G4endl; |
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| 346 | G4cout << "Energy balance from G4Penelope08PhotoElectric" << G4endl; |
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| 347 | G4cout << "Selected shell: " << WriteTargetShell(shellIndex) << " of element " << |
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| 348 | anElement->GetName() << G4endl; |
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| 349 | G4cout << "Incoming photon energy: " << photonEnergy/keV << " keV" << G4endl; |
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| 350 | G4cout << "-----------------------------------------------------------" << G4endl; |
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| 351 | if (eKineticEnergy) |
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| 352 | G4cout << "Outgoing electron " << eKineticEnergy/keV << " keV" << G4endl; |
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| 353 | G4cout << "Fluorescence: " << energyInFluorescence/keV << " keV" << G4endl; |
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| 354 | G4cout << "Local energy deposit " << localEnergyDeposit/keV << " keV" << G4endl; |
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| 355 | G4cout << "Total final state: " << (eKineticEnergy+energyInFluorescence+localEnergyDeposit)/keV << |
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| 356 | " keV" << G4endl; |
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| 357 | G4cout << "-----------------------------------------------------------" << G4endl; |
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| 358 | } |
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| 359 | if (verboseLevel > 0) |
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| 360 | { |
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| 361 | G4double energyDiff = |
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| 362 | std::fabs(eKineticEnergy+energyInFluorescence+localEnergyDeposit-photonEnergy); |
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| 363 | if (energyDiff > 0.05*keV) |
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| 364 | G4cout << "Warning from G4Penelope08PhotoElectric: problem with energy conservation: " << |
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| 365 | (eKineticEnergy+energyInFluorescence+localEnergyDeposit)/keV |
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| 366 | << " keV (final) vs. " << |
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| 367 | photonEnergy/keV << " keV (initial)" << G4endl; |
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| 368 | } |
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| 369 | } |
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| 370 | |
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| 371 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 372 | |
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| 373 | void G4Penelope08PhotoElectricModel::ActivateAuger(G4bool augerbool) |
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| 374 | { |
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| 375 | if (!DeexcitationFlag() && augerbool) |
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| 376 | { |
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| 377 | G4cout << "WARNING - G4Penelope08PhotoElectricModel" << G4endl; |
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| 378 | G4cout << "The use of the Atomic Deexcitation Manager is set to false " << G4endl; |
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| 379 | G4cout << "Therefore, Auger electrons will be not generated anyway" << G4endl; |
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| 380 | } |
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| 381 | deexcitationManager.ActivateAugerElectronProduction(augerbool); |
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| 382 | if (verboseLevel > 1) |
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| 383 | G4cout << "Auger production set to " << augerbool << G4endl; |
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| 384 | } |
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| 385 | |
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| 386 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 387 | |
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| 388 | G4double G4Penelope08PhotoElectricModel::SampleElectronDirection(G4double energy) |
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| 389 | { |
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| 390 | G4double costheta = 1.0; |
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| 391 | if (energy>1*GeV) return costheta; |
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| 392 | |
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| 393 | //1) initialize energy-dependent variables |
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| 394 | // Variable naming according to Eq. (2.24) of Penelope Manual |
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| 395 | // (pag. 44) |
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| 396 | G4double gamma = 1.0 + energy/electron_mass_c2; |
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| 397 | G4double gamma2 = gamma*gamma; |
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| 398 | G4double beta = std::sqrt((gamma2-1.0)/gamma2); |
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| 399 | |
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| 400 | // ac corresponds to "A" of Eq. (2.31) |
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| 401 | // |
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| 402 | G4double ac = (1.0/beta) - 1.0; |
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| 403 | G4double a1 = 0.5*beta*gamma*(gamma-1.0)*(gamma-2.0); |
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| 404 | G4double a2 = ac + 2.0; |
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| 405 | G4double gtmax = 2.0*(a1 + 1.0/ac); |
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| 406 | |
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| 407 | G4double tsam = 0; |
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| 408 | G4double gtr = 0; |
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| 409 | |
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| 410 | //2) sampling. Eq. (2.31) of Penelope Manual |
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| 411 | // tsam = 1-std::cos(theta) |
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| 412 | // gtr = rejection function according to Eq. (2.28) |
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| 413 | do{ |
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| 414 | G4double rand = G4UniformRand(); |
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| 415 | tsam = 2.0*ac * (2.0*rand + a2*std::sqrt(rand)) / (a2*a2 - 4.0*rand); |
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| 416 | gtr = (2.0 - tsam) * (a1 + 1.0/(ac+tsam)); |
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| 417 | }while(G4UniformRand()*gtmax > gtr); |
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| 418 | costheta = 1.0-tsam; |
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| 419 | |
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| 420 | |
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| 421 | return costheta; |
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| 422 | } |
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| 423 | |
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| 424 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 425 | |
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| 426 | void G4Penelope08PhotoElectricModel::ReadDataFile(G4int Z) |
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| 427 | { |
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| 428 | if (verboseLevel > 2) |
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| 429 | { |
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| 430 | G4cout << "G4Penelope08PhotoElectricModel::ReadDataFile()" << G4endl; |
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| 431 | G4cout << "Going to read PhotoElectric data files for Z=" << Z << G4endl; |
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| 432 | } |
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| 433 | |
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| 434 | char* path = getenv("G4LEDATA"); |
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| 435 | if (!path) |
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| 436 | { |
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| 437 | G4String excep = "G4Penelope08PhotoElectricModel - G4LEDATA environment variable not set!"; |
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| 438 | G4Exception(excep); |
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| 439 | } |
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| 440 | |
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| 441 | /* |
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| 442 | Read the cross section file |
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| 443 | */ |
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| 444 | std::ostringstream ost; |
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| 445 | if (Z>9) |
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| 446 | ost << path << "/penelope/photoelectric/pdgph" << Z << ".p08"; |
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| 447 | else |
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| 448 | ost << path << "/penelope/photoelectric/pdgph0" << Z << ".p08"; |
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| 449 | std::ifstream file(ost.str().c_str()); |
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| 450 | if (!file.is_open()) |
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| 451 | { |
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| 452 | G4String excep = "G4Penelope08PhotoElectricModel - data file " + G4String(ost.str()) + " not found!"; |
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| 453 | G4Exception(excep); |
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| 454 | } |
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| 455 | //I have to know in advance how many points are in the data list |
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| 456 | //to initialize the G4PhysicsFreeVector() |
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| 457 | size_t ndata=0; |
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| 458 | G4String line; |
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| 459 | while( getline(file, line) ) |
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| 460 | ndata++; |
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| 461 | ndata -= 1; |
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| 462 | //G4cout << "Found: " << ndata << " lines" << G4endl; |
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| 463 | |
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| 464 | file.clear(); |
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| 465 | file.close(); |
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| 466 | file.open(ost.str().c_str()); |
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| 467 | |
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| 468 | G4int readZ =0; |
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| 469 | size_t nShells= 0; |
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| 470 | file >> readZ >> nShells; |
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| 471 | |
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| 472 | if (verboseLevel > 3) |
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| 473 | G4cout << "Element Z=" << Z << " , nShells = " << nShells << G4endl; |
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| 474 | |
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| 475 | //check the right file is opened. |
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| 476 | if (readZ != Z || nShells <= 0) |
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| 477 | { |
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| 478 | G4cout << "G4Penelope08PhotoElectricModel::ReadDataFile()" << G4endl; |
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| 479 | G4cout << "Corrupted data file for Z=" << Z << G4endl; |
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| 480 | G4Exception(); |
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| 481 | } |
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| 482 | G4PhysicsTable* thePhysicsTable = new G4PhysicsTable(); |
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| 483 | |
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| 484 | //the table has to contain nShell+1 G4PhysicsFreeVectors, |
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| 485 | //(theTable)[0] --> total cross section |
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| 486 | //(theTable)[ishell] --> cross section for shell (ishell-1) |
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| 487 | |
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| 488 | //reserve space for the vectors |
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| 489 | //everything is log-log |
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| 490 | for (size_t i=0;i<nShells+1;i++) |
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| 491 | thePhysicsTable->push_back(new G4PhysicsFreeVector(ndata)); |
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| 492 | |
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| 493 | size_t k =0; |
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| 494 | for (k=0;k<ndata && !file.eof();k++) |
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| 495 | { |
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| 496 | G4double energy = 0; |
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| 497 | G4double aValue = 0; |
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| 498 | file >> energy ; |
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| 499 | energy *= eV; |
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[1337] | 500 | G4double logene = std::log(energy); |
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[1316] | 501 | //loop on the columns |
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| 502 | for (size_t i=0;i<nShells+1;i++) |
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| 503 | { |
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| 504 | file >> aValue; |
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| 505 | aValue *= barn; |
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| 506 | G4PhysicsFreeVector* theVec = (G4PhysicsFreeVector*) ((*thePhysicsTable)[i]); |
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| 507 | if (aValue < 1e-40*cm2) //protection against log(0) |
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| 508 | aValue = 1e-40*cm2; |
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[1337] | 509 | theVec->PutValue(k,logene,std::log(aValue)); |
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[1316] | 510 | } |
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| 511 | } |
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| 512 | |
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| 513 | if (verboseLevel > 2) |
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| 514 | { |
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| 515 | G4cout << "G4Penelope08PhotoElectricModel: read " << k << " points for element Z = " |
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| 516 | << Z << G4endl; |
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| 517 | } |
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| 518 | |
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| 519 | logAtomicShellXS->insert(std::make_pair(Z,thePhysicsTable)); |
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| 520 | |
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| 521 | file.close(); |
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| 522 | return; |
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| 523 | } |
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| 524 | |
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| 525 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 526 | |
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| 527 | size_t G4Penelope08PhotoElectricModel::SelectRandomShell(G4int Z,G4double energy) |
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| 528 | { |
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[1337] | 529 | G4double logEnergy = std::log(energy); |
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[1316] | 530 | |
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| 531 | //Check if data have been read (it should be!) |
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| 532 | if (!logAtomicShellXS->count(Z)) |
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| 533 | { |
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| 534 | G4cout << "Problem in G4Penelope08PhotoElectricModel::SelectRandomShell" << G4endl; |
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| 535 | G4cout << "Cannot find data for Z=" << Z << G4endl; |
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| 536 | G4Exception(); |
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| 537 | } |
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| 538 | |
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| 539 | size_t shellIndex = 0; |
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| 540 | |
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| 541 | G4PhysicsTable* theTable = logAtomicShellXS->find(Z)->second; |
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| 542 | |
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| 543 | G4DataVector* tempVector = new G4DataVector(); |
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| 544 | |
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| 545 | G4double sum = 0; |
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| 546 | //loop on shell partial XS, retrieve the value for the given energy and store on |
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| 547 | //a temporary vector |
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| 548 | tempVector->push_back(sum); //first element is zero |
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| 549 | |
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| 550 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[0]; |
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| 551 | G4double logXS = totalXSLog->Value(logEnergy); |
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[1337] | 552 | G4double totalXS = std::exp(logXS); |
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[1316] | 553 | |
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| 554 | //Notice: totalXS is the total cross section and it does *not* correspond to |
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| 555 | //the sum of partialXS's, since these include only K, L and M shells. |
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| 556 | // |
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| 557 | // Therefore, here one have to consider the possibility of ionisation of |
---|
| 558 | // an outer shell. Conventionally, it is indicated with id=10 in Penelope |
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| 559 | // |
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| 560 | |
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| 561 | for (size_t k=1;k<theTable->entries();k++) |
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| 562 | { |
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| 563 | G4PhysicsFreeVector* partialXSLog = (G4PhysicsFreeVector*) (*theTable)[k]; |
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| 564 | G4double logXS = partialXSLog->Value(logEnergy); |
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[1337] | 565 | G4double partialXS = std::exp(logXS); |
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[1316] | 566 | sum += partialXS; |
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| 567 | tempVector->push_back(sum); |
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| 568 | } |
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| 569 | |
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| 570 | tempVector->push_back(totalXS); //last element |
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| 571 | |
---|
| 572 | G4double random = G4UniformRand()*totalXS; |
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| 573 | |
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| 574 | /* |
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| 575 | for (size_t i=0;i<tempVector->size(); i++) |
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| 576 | G4cout << i << " " << (*tempVector)[i]/totalXS << G4endl; |
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| 577 | */ |
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| 578 | |
---|
| 579 | //locate bin of tempVector |
---|
| 580 | //Now one has to sample according to the elements in tempVector |
---|
| 581 | //This gives the left edge of the interval... |
---|
| 582 | size_t lowerBound = 0; |
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| 583 | size_t upperBound = tempVector->size()-1; |
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| 584 | while (lowerBound <= upperBound) |
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| 585 | { |
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| 586 | size_t midBin = (lowerBound + upperBound)/2; |
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| 587 | if( random < (*tempVector)[midBin]) |
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| 588 | upperBound = midBin-1; |
---|
| 589 | else |
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| 590 | lowerBound = midBin+1; |
---|
| 591 | } |
---|
| 592 | |
---|
| 593 | shellIndex = upperBound; |
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| 594 | |
---|
| 595 | delete tempVector; |
---|
| 596 | return shellIndex; |
---|
| 597 | } |
---|
| 598 | |
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| 599 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 600 | |
---|
| 601 | size_t G4Penelope08PhotoElectricModel::GetNumberOfShellXS(G4int Z) |
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| 602 | { |
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| 603 | //read data files |
---|
| 604 | if (!logAtomicShellXS->count(Z)) |
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| 605 | ReadDataFile(Z); |
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| 606 | //now it should be ok |
---|
| 607 | if (!logAtomicShellXS->count(Z)) |
---|
| 608 | { |
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| 609 | G4cout << "Problem in G4Penelope08PhotoElectricModel::GetNumberOfShellXS()" |
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| 610 | << G4endl; |
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| 611 | G4Exception(); |
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| 612 | } |
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| 613 | //one vector is allocated for the _total_ cross section |
---|
| 614 | size_t nEntries = logAtomicShellXS->find(Z)->second->entries(); |
---|
| 615 | return (nEntries-1); |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 619 | |
---|
| 620 | G4double G4Penelope08PhotoElectricModel::GetShellCrossSection(G4int Z,size_t shellID,G4double energy) |
---|
| 621 | { |
---|
| 622 | //this forces also the loading of the data |
---|
| 623 | size_t entries = GetNumberOfShellXS(Z); |
---|
| 624 | |
---|
| 625 | if (shellID >= entries) |
---|
| 626 | { |
---|
| 627 | G4cout << "Element Z=" << Z << " has data for " << entries << " shells only" << G4endl; |
---|
| 628 | G4cout << "so shellID should be from 0 to " << entries-1 << G4endl; |
---|
| 629 | return 0; |
---|
| 630 | } |
---|
| 631 | |
---|
| 632 | G4PhysicsTable* theTable = logAtomicShellXS->find(Z)->second; |
---|
| 633 | //[0] is the total XS, shellID is in the element [shellID+1] |
---|
| 634 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[shellID+1]; |
---|
| 635 | |
---|
| 636 | if (!totalXSLog) |
---|
| 637 | { |
---|
| 638 | G4cout << "Problem in G4Penelope08PhotoElectricModel::GetShellCrossSection()" |
---|
| 639 | << G4endl; |
---|
| 640 | G4Exception(); |
---|
| 641 | } |
---|
[1337] | 642 | G4double logene = std::log(energy); |
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[1316] | 643 | G4double logXS = totalXSLog->Value(logene); |
---|
[1337] | 644 | G4double cross = std::exp(logXS); |
---|
[1316] | 645 | if (cross < 2e-40*cm2) cross = 0; |
---|
| 646 | return cross; |
---|
| 647 | } |
---|
| 648 | |
---|
| 649 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 650 | |
---|
| 651 | G4String G4Penelope08PhotoElectricModel::WriteTargetShell(size_t shellID) |
---|
| 652 | { |
---|
| 653 | G4String theShell = "outer shell"; |
---|
| 654 | if (shellID == 0) |
---|
| 655 | theShell = "K"; |
---|
| 656 | else if (shellID == 1) |
---|
| 657 | theShell = "L1"; |
---|
| 658 | else if (shellID == 2) |
---|
| 659 | theShell = "L2"; |
---|
| 660 | else if (shellID == 3) |
---|
| 661 | theShell = "L3"; |
---|
| 662 | else if (shellID == 4) |
---|
| 663 | theShell = "M1"; |
---|
| 664 | else if (shellID == 5) |
---|
| 665 | theShell = "M2"; |
---|
| 666 | else if (shellID == 6) |
---|
| 667 | theShell = "M3"; |
---|
| 668 | else if (shellID == 7) |
---|
| 669 | theShell = "M4"; |
---|
| 670 | else if (shellID == 8) |
---|
| 671 | theShell = "M5"; |
---|
| 672 | |
---|
| 673 | return theShell; |
---|
| 674 | } |
---|