[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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[991] | 26 | // $Id: G4PenelopeIonisationModel.cc,v 1.2 2008/12/05 09:15:43 pandola Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-02 $ |
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[968] | 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 | // 26 Nov 2008 L Pandola Migration from process to model |
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| 34 | // |
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| 35 | |
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| 36 | #include "G4PenelopeIonisationModel.hh" |
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| 37 | #include "G4ParticleDefinition.hh" |
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| 38 | #include "G4MaterialCutsCouple.hh" |
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| 39 | #include "G4ProductionCutsTable.hh" |
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| 40 | #include "G4DynamicParticle.hh" |
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| 41 | #include "G4Element.hh" |
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| 42 | #include "G4AtomicTransitionManager.hh" |
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| 43 | #include "G4AtomicDeexcitation.hh" |
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| 44 | #include "G4AtomicShell.hh" |
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| 45 | #include "G4Gamma.hh" |
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| 46 | #include "G4Electron.hh" |
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| 47 | #include "G4Positron.hh" |
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| 48 | #include "G4CrossSectionHandler.hh" |
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| 49 | #include "G4AtomicDeexcitation.hh" |
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| 50 | #include "G4ProcessManager.hh" |
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| 51 | #include "G4VEMDataSet.hh" |
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| 52 | |
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| 53 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 54 | |
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| 55 | |
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| 56 | G4PenelopeIonisationModel::G4PenelopeIonisationModel(const G4ParticleDefinition*, |
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| 57 | const G4String& nam) |
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| 58 | :G4VEmModel(nam),isInitialised(false), |
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| 59 | kineticEnergy1(0.*eV), |
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| 60 | cosThetaPrimary(1.0), |
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| 61 | energySecondary(0.*eV), |
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| 62 | cosThetaSecondary(0.0), |
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| 63 | iOsc(-1), |
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| 64 | crossSectionHandler(0),ionizationEnergy(0), |
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| 65 | resonanceEnergy(0),occupationNumber(0),shellFlag(0), |
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| 66 | theXSTable(0) |
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| 67 | { |
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| 68 | fIntrinsicLowEnergyLimit = 100.0*eV; |
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| 69 | fIntrinsicHighEnergyLimit = 100.0*GeV; |
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| 70 | SetLowEnergyLimit(fIntrinsicLowEnergyLimit); |
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| 71 | SetHighEnergyLimit(fIntrinsicHighEnergyLimit); |
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| 72 | // |
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| 73 | |
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| 74 | fUseAtomicDeexcitation = true; |
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| 75 | verboseLevel= 0; |
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| 76 | |
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| 77 | // Verbosity scale: |
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| 78 | // 0 = nothing |
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| 79 | // 1 = warning for energy non-conservation |
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| 80 | // 2 = details of energy budget |
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| 81 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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| 82 | // 4 = entering in methods |
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| 83 | |
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| 84 | //These vectors do not change when materials or cut change. |
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| 85 | //Therefore I can read it at the constructor |
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| 86 | ionizationEnergy = new std::map<G4int,G4DataVector*>; |
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| 87 | resonanceEnergy = new std::map<G4int,G4DataVector*>; |
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| 88 | occupationNumber = new std::map<G4int,G4DataVector*>; |
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| 89 | shellFlag = new std::map<G4int,G4DataVector*>; |
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| 90 | |
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| 91 | ReadData(); //Read data from file |
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| 92 | |
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| 93 | } |
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| 94 | |
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| 95 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 96 | |
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| 97 | G4PenelopeIonisationModel::~G4PenelopeIonisationModel() |
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| 98 | { |
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| 99 | |
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| 100 | if (crossSectionHandler) delete crossSectionHandler; |
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| 101 | |
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| 102 | if (theXSTable) |
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| 103 | { |
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| 104 | for (size_t i=0; i<theXSTable->size(); i++) |
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| 105 | delete (*theXSTable)[i]; |
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| 106 | delete theXSTable; |
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| 107 | } |
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| 108 | |
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| 109 | |
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| 110 | std::map <G4int,G4DataVector*>::iterator i; |
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| 111 | for (i=ionizationEnergy->begin();i != ionizationEnergy->end();i++) |
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| 112 | if (i->second) delete i->second; |
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| 113 | for (i=resonanceEnergy->begin();i != resonanceEnergy->end();i++) |
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| 114 | if (i->second) delete i->second; |
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| 115 | for (i=occupationNumber->begin();i != occupationNumber->end();i++) |
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| 116 | if (i->second) delete i->second; |
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| 117 | for (i=shellFlag->begin();i != shellFlag->end();i++) |
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| 118 | if (i->second) delete i->second; |
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| 119 | |
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| 120 | if (ionizationEnergy) |
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| 121 | delete ionizationEnergy; |
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| 122 | if (resonanceEnergy) |
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| 123 | delete resonanceEnergy; |
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| 124 | if (occupationNumber) |
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| 125 | delete occupationNumber; |
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| 126 | if (shellFlag) |
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| 127 | delete shellFlag; |
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| 128 | } |
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| 129 | |
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| 130 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 131 | |
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| 132 | void G4PenelopeIonisationModel::Initialise(const G4ParticleDefinition* particle, |
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| 133 | const G4DataVector& cuts) |
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| 134 | { |
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| 135 | if (verboseLevel > 3) |
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| 136 | G4cout << "Calling G4PenelopeIonisationModel::Initialise()" << G4endl; |
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| 137 | |
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| 138 | InitialiseElementSelectors(particle,cuts); |
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| 139 | |
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| 140 | //Delete and re-initialize the cross section handler |
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| 141 | if (crossSectionHandler) |
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| 142 | { |
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| 143 | crossSectionHandler->Clear(); |
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| 144 | delete crossSectionHandler; |
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| 145 | } |
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| 146 | |
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| 147 | if (theXSTable) |
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| 148 | { |
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| 149 | for (size_t i=0; i<theXSTable->size(); i++) |
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| 150 | delete (*theXSTable)[i]; |
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| 151 | delete theXSTable; |
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| 152 | } |
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| 153 | |
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| 154 | |
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| 155 | if (LowEnergyLimit() < fIntrinsicLowEnergyLimit) |
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| 156 | { |
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| 157 | G4cout << "G4PenelopeIonisationModel: low energy limit increased from " << |
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| 158 | LowEnergyLimit()/eV << " eV to " << fIntrinsicLowEnergyLimit/eV << " eV" << G4endl; |
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| 159 | SetLowEnergyLimit(fIntrinsicLowEnergyLimit); |
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| 160 | } |
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| 161 | if (HighEnergyLimit() > fIntrinsicHighEnergyLimit) |
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| 162 | { |
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| 163 | G4cout << "G4PenelopeIonisationModel: high energy limit decreased from " << |
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| 164 | HighEnergyLimit()/GeV << " GeV to " << fIntrinsicHighEnergyLimit/GeV << " GeV" << G4endl; |
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| 165 | SetHighEnergyLimit(fIntrinsicHighEnergyLimit); |
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| 166 | } |
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| 167 | |
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| 168 | crossSectionHandler = new G4CrossSectionHandler(); |
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| 169 | crossSectionHandler->Clear(); |
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| 170 | G4String crossSectionFile = "NULL"; |
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| 171 | |
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| 172 | if (particle == G4Electron::Electron()) |
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| 173 | crossSectionFile = "penelope/ion-cs-el-"; |
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| 174 | else if (particle == G4Positron::Positron()) |
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| 175 | crossSectionFile = "penelope/ion-cs-po-"; |
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| 176 | crossSectionHandler->LoadData(crossSectionFile); |
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| 177 | //This is used to retrieve cross section values later on |
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| 178 | crossSectionHandler->BuildMeanFreePathForMaterials(); |
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| 179 | |
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| 180 | if (verboseLevel > 2) |
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| 181 | G4cout << "Loaded cross section files for PenelopeIonisationModel" << G4endl; |
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| 182 | |
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| 183 | |
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| 184 | G4cout << "Penelope Ionisation model is initialized " << G4endl |
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| 185 | << "Energy range: " |
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| 186 | << LowEnergyLimit() / keV << " keV - " |
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| 187 | << HighEnergyLimit() / GeV << " GeV" |
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| 188 | << G4endl; |
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| 189 | |
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| 190 | if(isInitialised) return; |
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| 191 | |
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| 192 | if(pParticleChange) |
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| 193 | fParticleChange = reinterpret_cast<G4ParticleChangeForLoss*>(pParticleChange); |
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| 194 | else |
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| 195 | fParticleChange = new G4ParticleChangeForLoss(); |
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| 196 | isInitialised = true; |
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| 197 | } |
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| 198 | |
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| 199 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 200 | |
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| 201 | G4double G4PenelopeIonisationModel::CrossSectionPerVolume(const G4Material* material, |
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| 202 | const G4ParticleDefinition* theParticle, |
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| 203 | G4double energy, |
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| 204 | G4double cutEnergy, |
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| 205 | G4double) |
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| 206 | { |
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| 207 | // Penelope model to calculate the cross section for inelastic collisions above the |
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| 208 | // threshold. It makes use of the Generalised Oscillator Strength (GOS) model from |
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| 209 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567 |
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| 210 | // |
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| 211 | // The total cross section (hard+soft) is read from a database file (element per |
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| 212 | // element), while the ratio hard-to-total is calculated analytically by taking |
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| 213 | // into account the atomic oscillators coming into the play for a given threshold. |
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| 214 | // This is done by the method CalculateCrossSectionsRatio(). |
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| 215 | // For incident e- the maximum energy allowed for the delta-rays is energy/2. |
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| 216 | // because particles are undistinghishable. |
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| 217 | // |
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| 218 | // The contribution is splitted in three parts: distant longitudinal collisions, |
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| 219 | // distant transverse collisions and close collisions. Each term is described by |
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| 220 | // its own analytical function. |
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| 221 | // Fermi density correction is calculated analytically according to |
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| 222 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1 |
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| 223 | // |
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| 224 | if (verboseLevel > 3) |
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| 225 | G4cout << "Calling CrossSectionPerVolume() of G4PenelopeIonisationModel" << G4endl; |
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| 226 | |
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| 227 | SetupForMaterial(theParticle, material, energy); |
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| 228 | |
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| 229 | if (!crossSectionHandler) |
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| 230 | { |
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| 231 | G4cout << "G4PenelopeIonisationModel::CrossSectionPerVolume" << G4endl; |
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| 232 | G4cout << "The cross section handler is not correctly initialized" << G4endl; |
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| 233 | G4Exception(); |
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| 234 | } |
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| 235 | |
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| 236 | if (!theXSTable) |
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| 237 | { |
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| 238 | if (verboseLevel > 2) |
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| 239 | { |
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| 240 | G4cout << "G4PenelopeIonisationModel::CrossSectionPerVolume" << G4endl; |
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| 241 | G4cout << "Going to build Cross Section table " << G4endl; |
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| 242 | } |
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| 243 | theXSTable = new std::vector<G4VEMDataSet*>; |
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| 244 | theXSTable = BuildCrossSectionTable(theParticle); |
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| 245 | } |
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| 246 | |
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| 247 | G4double totalCross = 0.0; |
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| 248 | G4double cross = 0.0; |
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| 249 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 250 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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| 251 | G4double electronVolumeDensity = |
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| 252 | material->GetTotNbOfElectPerVolume(); //electron density |
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| 253 | |
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| 254 | if (verboseLevel > 4) |
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| 255 | G4cout << "Electron volume density of " << material->GetName() << ": " << |
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| 256 | electronVolumeDensity*cm3 << " electrons/cm3" << G4endl; |
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| 257 | |
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| 258 | G4int nelm = material->GetNumberOfElements(); |
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| 259 | for (G4int i=0; i<nelm; i++) |
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| 260 | { |
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| 261 | G4int iZ = (G4int) (*theElementVector)[i]->GetZ(); |
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| 262 | G4double ratio = CalculateCrossSectionsRatio(energy,cutEnergy,iZ,electronVolumeDensity, |
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| 263 | theParticle); |
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| 264 | cross += theAtomNumDensityVector[i]* |
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| 265 | crossSectionHandler->FindValue(iZ,energy)*ratio; |
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| 266 | totalCross += theAtomNumDensityVector[i]* |
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| 267 | crossSectionHandler->FindValue(iZ,energy); |
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| 268 | } |
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| 269 | |
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| 270 | if (verboseLevel > 2) |
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| 271 | { |
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| 272 | G4cout << "G4PenelopeIonisationModel " << G4endl; |
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| 273 | G4cout << "Mean free path for delta emission > " << cutEnergy/keV << " keV at " << |
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| 274 | energy/keV << " keV = " << (1./cross)/mm << " mm" << G4endl; |
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| 275 | G4cout << "Total free path for ionisation (no threshold) at " << |
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| 276 | energy/keV << " keV = " << (1./totalCross)/mm << " mm" << G4endl; |
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| 277 | } |
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| 278 | return cross; |
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| 279 | } |
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| 280 | |
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| 281 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 282 | |
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| 283 | G4double G4PenelopeIonisationModel::ComputeDEDXPerVolume(const G4Material* material, |
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| 284 | const G4ParticleDefinition* theParticle, |
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| 285 | G4double kineticEnergy, |
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| 286 | G4double cutEnergy) |
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| 287 | { |
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| 288 | // Penelope model to calculate the stopping power for soft inelastic collisions |
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| 289 | // below the threshold. It makes use of the Generalised Oscillator Strength (GOS) |
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| 290 | // model from |
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| 291 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567 |
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| 292 | // |
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| 293 | // The stopping power is calculated analytically using the dsigma/dW cross |
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| 294 | // section from the GOS models, which includes separate contributions from |
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| 295 | // distant longitudinal collisions, distant transverse collisions and |
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| 296 | // close collisions. Only the atomic oscillators that come in the play |
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| 297 | // (according to the threshold) are considered for the calculation. |
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| 298 | // Differential cross sections have a different form for e+ and e-. |
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| 299 | // |
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| 300 | // Fermi density correction is calculated analytically according to |
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| 301 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1 |
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| 302 | |
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| 303 | if (verboseLevel > 3) |
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| 304 | G4cout << "Calling ComputeDEDX() of G4PenelopeIonisationModel" << G4endl; |
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| 305 | |
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| 306 | G4double sPower = 0.0; |
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| 307 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 308 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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| 309 | G4double electronVolumeDensity = |
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| 310 | material->GetTotNbOfElectPerVolume(); //electron density |
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| 311 | |
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| 312 | //Loop on the elements in the material |
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| 313 | G4int nelm = material->GetNumberOfElements(); |
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| 314 | for (G4int i=0; i<nelm; i++) |
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| 315 | { |
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| 316 | G4int iZ = (G4int) (*theElementVector)[i]->GetZ(); |
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| 317 | |
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| 318 | //Calculate stopping power contribution from each element |
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| 319 | //Constants |
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| 320 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2; |
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| 321 | G4double gamma2 = gamma*gamma; |
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| 322 | G4double beta2 = (gamma2-1.0)/gamma2; |
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| 323 | G4double constant = pi*classic_electr_radius*classic_electr_radius |
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| 324 | *2.0*electron_mass_c2/beta2; |
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| 325 | |
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| 326 | G4double delta = CalculateDeltaFermi(kineticEnergy,iZ,electronVolumeDensity); |
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| 327 | G4int nbOsc = (G4int) resonanceEnergy->find(iZ)->second->size(); |
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| 328 | G4double stoppingPowerForElement = 0.0; |
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| 329 | //Loop on oscillators of element Z |
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| 330 | for (G4int iosc=0;iosc<nbOsc;iosc++) |
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| 331 | { |
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| 332 | G4double S1 = 0.0; |
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| 333 | G4double resEnergy = (*(resonanceEnergy->find(iZ)->second))[iosc]; |
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| 334 | if (theParticle == G4Electron::Electron()) |
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| 335 | S1 = ComputeStoppingPowerForElectrons(kineticEnergy,cutEnergy,delta,resEnergy); |
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| 336 | else if (theParticle == G4Positron::Positron()) |
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| 337 | S1 = ComputeStoppingPowerForPositrons(kineticEnergy,cutEnergy,delta,resEnergy); |
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| 338 | G4double occupNb = (*(occupationNumber->find(iZ)->second))[iosc]; |
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| 339 | stoppingPowerForElement += occupNb*constant*S1; |
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| 340 | } |
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| 341 | |
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| 342 | sPower += stoppingPowerForElement*theAtomNumDensityVector[i]; |
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| 343 | } |
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| 344 | if (verboseLevel > 2) |
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| 345 | { |
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| 346 | G4cout << "G4PenelopeIonisationModel " << G4endl; |
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| 347 | G4cout << "Stopping power < " << cutEnergy/keV << " keV at " << |
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| 348 | kineticEnergy/keV << " keV = " << sPower/(keV/mm) << " keV/mm" << G4endl; |
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| 349 | } |
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| 350 | return sPower; |
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| 351 | } |
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| 352 | |
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| 353 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 354 | |
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| 355 | void G4PenelopeIonisationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
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| 356 | const G4MaterialCutsCouple* couple, |
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| 357 | const G4DynamicParticle* aDynamicParticle, |
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| 358 | G4double, |
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| 359 | G4double) |
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| 360 | { |
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| 361 | // Penelope model to sample the final state following an hard inelastic interaction. |
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| 362 | // It makes use of the Generalised Oscillator Strength (GOS) model from |
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| 363 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567 |
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| 364 | // |
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| 365 | // The GOS model is used to calculate the individual cross sections for all |
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| 366 | // the atomic oscillators coming in the play, taking into account the three |
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| 367 | // contributions (distant longitudinal collisions, distant transverse collisions and |
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| 368 | // close collisions). Then the target shell and the interaction channel are |
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| 369 | // sampled. Final state of the delta-ray (energy, angle) are generated according |
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| 370 | // to the analytical distributions (dSigma/dW) for the selected interaction |
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| 371 | // channels. |
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| 372 | // For e-, the maximum energy for the delta-ray is initialEnergy/2. (because |
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| 373 | // particles are indistinghusbable), while it is the full initialEnergy for |
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| 374 | // e+. |
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| 375 | // The efficiency of the random sampling algorithm (e.g. for close collisions) |
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| 376 | // decreases when initial and cutoff energy increase (e.g. 87% for 10-keV primary |
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| 377 | // and 1 keV threshold, 99% for 10-MeV primary and 10-keV threshold). |
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| 378 | // Differential cross sections have a different form for e+ and e-. |
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| 379 | // |
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| 380 | // WARNING: The model provides an _average_ description of inelastic collisions. |
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| 381 | // Anyway, the energy spectrum associated to distant excitations of a given |
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| 382 | // atomic shell is approximated as a single resonance. The simulated energy spectra |
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| 383 | // show _unphysical_ narrow peaks at energies that are multiple of the shell |
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| 384 | // resonance energies. The spurious speaks are automatically smoothed out after |
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| 385 | // multiple inelastic collisions. |
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| 386 | // |
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| 387 | // The model determines also the original shell from which the delta-ray is expelled, |
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| 388 | // in order to produce fluorescence de-excitation (from G4DeexcitationManager) |
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| 389 | // |
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| 390 | // Fermi density correction is calculated analytically according to |
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| 391 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1 |
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| 392 | |
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| 393 | if (verboseLevel > 3) |
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| 394 | G4cout << "Calling SamplingSecondaries() of G4PenelopeIonisationModel" << G4endl; |
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| 395 | |
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| 396 | G4double kineticEnergy0 = aDynamicParticle->GetKineticEnergy(); |
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| 397 | const G4ParticleDefinition* theParticle = aDynamicParticle->GetDefinition(); |
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| 398 | |
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| 399 | if (kineticEnergy0 <= LowEnergyLimit()) |
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| 400 | { |
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| 401 | fParticleChange->SetProposedKineticEnergy(0.); |
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| 402 | fParticleChange->ProposeLocalEnergyDeposit(kineticEnergy0); |
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| 403 | //Check if there are AtRest processes |
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| 404 | if (theParticle->GetProcessManager()->GetAtRestProcessVector()->size()) |
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| 405 | //In this case there is at least one AtRest process |
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| 406 | fParticleChange->ProposeTrackStatus(fStopButAlive); |
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| 407 | else |
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| 408 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
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| 409 | return ; |
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| 410 | } |
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| 411 | const G4double electronVolumeDensity = |
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| 412 | couple->GetMaterial()->GetTotNbOfElectPerVolume(); |
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| 413 | G4ParticleMomentum particleDirection0 = aDynamicParticle->GetMomentumDirection(); |
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| 414 | |
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| 415 | //Initialise final-state variables. The proper values will be set by the methods |
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| 416 | // CalculateDiscreteForElectrons() and CalculateDiscreteForPositrons() |
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| 417 | kineticEnergy1=kineticEnergy0; |
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| 418 | cosThetaPrimary=1.0; |
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| 419 | energySecondary=0.0; |
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| 420 | cosThetaSecondary=1.0; |
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| 421 | |
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| 422 | // Select randomly one element in the current material |
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| 423 | if (verboseLevel > 2) |
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| 424 | G4cout << "Going to select element in " << couple->GetMaterial()->GetName() << G4endl; |
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| 425 | |
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| 426 | //Use sampler of G4CrossSectionHandler for now |
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| 427 | // atom can be selected effitiantly if element selectors are initialised |
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| 428 | //const G4Element* anElement = SelectRandomAtom(couple,theParticle,kineticEnergy0); |
---|
| 429 | |
---|
| 430 | G4int iZ = SampleRandomAtom(couple,kineticEnergy0); |
---|
| 431 | |
---|
| 432 | G4double cutForLowEnergySecondaryParticles = 250.0*eV; |
---|
| 433 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 434 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 435 | size_t indx = couple->GetIndex(); |
---|
| 436 | G4double cutE = (*(theCoupleTable->GetEnergyCutsVector(1)))[indx]; |
---|
| 437 | G4double cutG = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx]; |
---|
| 438 | |
---|
| 439 | //Production cut for delta-rays (electrons) |
---|
| 440 | cutE = std::max(cutForLowEnergySecondaryParticles,cutE); |
---|
| 441 | //Production cut for gamma (fluorescence) |
---|
| 442 | cutG = std::max(cutForLowEnergySecondaryParticles,cutG); |
---|
| 443 | |
---|
| 444 | if (verboseLevel > 2) |
---|
| 445 | G4cout << "Selected Z = " << iZ << G4endl; |
---|
| 446 | |
---|
| 447 | // The method CalculateDiscreteForXXXX() set the private variables: |
---|
| 448 | // kineticEnergy1 = energy of the primary electron/positron after the interaction |
---|
| 449 | // cosThetaPrimary = std::cos(theta) of the primary after the interaction |
---|
| 450 | // energySecondary = energy of the secondary electron |
---|
| 451 | // cosThetaSecondary = std::cos(theta) of the secondary |
---|
| 452 | if (theParticle == G4Electron::Electron()) |
---|
| 453 | CalculateDiscreteForElectrons(kineticEnergy0,cutE,iZ,electronVolumeDensity); |
---|
| 454 | else if (theParticle == G4Positron::Positron()) |
---|
| 455 | CalculateDiscreteForPositrons(kineticEnergy0,cutE,iZ,electronVolumeDensity); |
---|
| 456 | |
---|
| 457 | // if (energySecondary == 0) return; |
---|
| 458 | |
---|
| 459 | //Update the primary particle |
---|
| 460 | G4double sint = std::sqrt(1. - cosThetaPrimary*cosThetaPrimary); |
---|
| 461 | G4double phi = twopi * G4UniformRand(); |
---|
| 462 | G4double dirx = sint * std::cos(phi); |
---|
| 463 | G4double diry = sint * std::sin(phi); |
---|
| 464 | G4double dirz = cosThetaPrimary; |
---|
| 465 | |
---|
| 466 | G4ThreeVector electronDirection1(dirx,diry,dirz); |
---|
| 467 | electronDirection1.rotateUz(particleDirection0); |
---|
| 468 | |
---|
| 469 | if (kineticEnergy1 > 0) |
---|
| 470 | { |
---|
| 471 | fParticleChange->ProposeMomentumDirection(electronDirection1); |
---|
| 472 | fParticleChange->SetProposedKineticEnergy(kineticEnergy1); |
---|
| 473 | } |
---|
| 474 | else |
---|
| 475 | { |
---|
| 476 | fParticleChange->ProposeMomentumDirection(electronDirection1); |
---|
| 477 | fParticleChange->SetProposedKineticEnergy(0.*eV); |
---|
| 478 | if (theParticle->GetProcessManager()->GetAtRestProcessVector()->size()) |
---|
| 479 | //In this case there is at least one AtRest process |
---|
| 480 | fParticleChange->ProposeTrackStatus(fStopButAlive); |
---|
| 481 | else |
---|
| 482 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
---|
| 483 | } |
---|
| 484 | |
---|
| 485 | //Generate the delta ray |
---|
| 486 | G4int iosc2 = 0; |
---|
| 487 | G4double ioniEnergy = 0.0; |
---|
| 488 | if (iOsc > 0) { |
---|
| 489 | ioniEnergy=(*(ionizationEnergy->find(iZ)->second))[iOsc]; |
---|
| 490 | iosc2 = (ionizationEnergy->find(iZ)->second->size()) - iOsc; //they are in reversed order |
---|
| 491 | } |
---|
| 492 | |
---|
| 493 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
---|
| 494 | G4double bindingEnergy = 0.0; |
---|
| 495 | G4int shellId = 0; |
---|
| 496 | if (iOsc > 0) |
---|
| 497 | { |
---|
| 498 | const G4AtomicShell* shell = transitionManager->Shell(iZ,iosc2-1); // Modified by Alf |
---|
| 499 | bindingEnergy = shell->BindingEnergy(); |
---|
| 500 | shellId = shell->ShellId(); |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | G4double ionEnergy = bindingEnergy; //energy spent to ionise the atom according to G4dabatase |
---|
| 504 | G4double eKineticEnergy = energySecondary; |
---|
| 505 | |
---|
| 506 | //This is an awful thing: Penelope generates the fluorescence only for L and K shells |
---|
| 507 | //(i.e. Osc = 1 --> 4). For high-Z, the other shells can be quite relevant. In this case |
---|
| 508 | //one MUST ensure ''by hand'' the energy conservation. Then there is the other problem that |
---|
| 509 | //the fluorescence database of Penelope doesn not match that of Geant4. |
---|
| 510 | |
---|
| 511 | G4double energyBalance = kineticEnergy0 - kineticEnergy1 - energySecondary; //Penelope Balance |
---|
| 512 | |
---|
| 513 | if (std::abs(energyBalance) < 1*eV) |
---|
| 514 | //in this case Penelope didn't subtract the fluorescence energy: do here by hand |
---|
| 515 | eKineticEnergy = energySecondary - bindingEnergy; |
---|
| 516 | else |
---|
| 517 | //Penelope subtracted the fluorescence, but one has to match the databases |
---|
| 518 | eKineticEnergy = energySecondary+ioniEnergy-bindingEnergy; |
---|
[991] | 519 | |
---|
| 520 | //VERIFICA QUI LA STORIA DEL LOCAL ENERGY DEPOSIT! |
---|
| 521 | |
---|
[968] | 522 | G4double localEnergyDeposit = ionEnergy; |
---|
| 523 | G4double energyInFluorescence = 0.0*eV; |
---|
| 524 | |
---|
| 525 | std::vector<G4DynamicParticle*> *photonVector = 0; |
---|
| 526 | if (fUseAtomicDeexcitation) |
---|
| 527 | { |
---|
| 528 | if (iZ>5 && (ionEnergy > cutG || ionEnergy > cutE)) |
---|
| 529 | { |
---|
| 530 | photonVector = deexcitationManager.GenerateParticles(iZ,shellId); |
---|
| 531 | //Check for single photons if they are above threshold |
---|
| 532 | for (size_t k=0;k<photonVector->size();k++) |
---|
| 533 | { |
---|
| 534 | G4DynamicParticle* aPhoton = (*photonVector)[k]; |
---|
| 535 | if (aPhoton) |
---|
| 536 | { |
---|
| 537 | G4double itsCut = cutG; |
---|
| 538 | if (aPhoton->GetDefinition() == G4Electron::Electron()) itsCut = cutE; |
---|
| 539 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
---|
| 540 | if (itsEnergy > itsCut && itsEnergy <= ionEnergy) |
---|
| 541 | { |
---|
| 542 | localEnergyDeposit -= itsEnergy; |
---|
| 543 | energyInFluorescence += itsEnergy; |
---|
| 544 | } |
---|
| 545 | else |
---|
| 546 | { |
---|
| 547 | delete aPhoton; |
---|
| 548 | (*photonVector)[k] = 0; |
---|
| 549 | } |
---|
| 550 | } |
---|
| 551 | } |
---|
| 552 | } |
---|
| 553 | } |
---|
| 554 | |
---|
| 555 | // Generate the delta ray |
---|
| 556 | G4double sin2 = std::sqrt(1. - cosThetaSecondary*cosThetaSecondary); |
---|
| 557 | G4double phi2 = twopi * G4UniformRand(); |
---|
| 558 | |
---|
| 559 | G4double xEl = sin2 * std::cos(phi2); |
---|
| 560 | G4double yEl = sin2 * std::sin(phi2); |
---|
| 561 | G4double zEl = cosThetaSecondary; |
---|
| 562 | G4ThreeVector eDirection(xEl,yEl,zEl); //electron direction |
---|
| 563 | eDirection.rotateUz(particleDirection0); |
---|
| 564 | |
---|
| 565 | G4DynamicParticle* deltaElectron = new G4DynamicParticle (G4Electron::Electron(), |
---|
| 566 | eDirection,eKineticEnergy) ; |
---|
| 567 | fvect->push_back(deltaElectron); |
---|
| 568 | |
---|
| 569 | //Generate fluorescence, if it is the case |
---|
| 570 | //This block is executed only if there is at least one secondary photon produced by |
---|
| 571 | //G4AtomicDeexcitation |
---|
| 572 | if (photonVector) |
---|
| 573 | { |
---|
| 574 | for (size_t ll=0;ll<photonVector->size();ll++) |
---|
| 575 | if ((*photonVector)[ll]) |
---|
| 576 | { |
---|
| 577 | G4DynamicParticle* aFluorescencePhoton = (*photonVector)[ll]; |
---|
| 578 | fvect->push_back(aFluorescencePhoton); |
---|
| 579 | } |
---|
| 580 | } |
---|
| 581 | delete photonVector; |
---|
| 582 | |
---|
| 583 | if (localEnergyDeposit < 0) |
---|
| 584 | { |
---|
| 585 | G4cout << "WARNING-" |
---|
| 586 | << "G4PenelopeIonisationModel::SampleSecondaries - Negative energy deposit" |
---|
| 587 | << G4endl; |
---|
| 588 | localEnergyDeposit=0.; |
---|
| 589 | } |
---|
| 590 | fParticleChange->ProposeLocalEnergyDeposit(localEnergyDeposit); |
---|
| 591 | |
---|
| 592 | if (verboseLevel > 1) |
---|
| 593 | { |
---|
| 594 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
| 595 | G4cout << "Energy balance from G4PenelopeIonisation" << G4endl; |
---|
| 596 | G4cout << "Incoming primary energy: " << kineticEnergy0/keV << " keV" << G4endl; |
---|
| 597 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
| 598 | G4cout << "Outgoing primary energy: " << kineticEnergy1/keV << " keV" << G4endl; |
---|
| 599 | G4cout << "Delta ray " << eKineticEnergy/keV << " keV" << G4endl; |
---|
| 600 | G4cout << "Fluorescence: " << energyInFluorescence/keV << " keV" << G4endl; |
---|
| 601 | G4cout << "Local energy deposit " << localEnergyDeposit/keV << " keV" << G4endl; |
---|
| 602 | G4cout << "Total final state: " << (eKineticEnergy+energyInFluorescence+kineticEnergy1+ |
---|
| 603 | localEnergyDeposit)/keV << |
---|
| 604 | " keV" << G4endl; |
---|
| 605 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
| 606 | } |
---|
| 607 | if (verboseLevel > 0) |
---|
| 608 | { |
---|
| 609 | G4double energyDiff = std::fabs(eKineticEnergy+energyInFluorescence+kineticEnergy1+ |
---|
| 610 | localEnergyDeposit-kineticEnergy0); |
---|
| 611 | if (energyDiff > 0.05*keV) |
---|
| 612 | G4cout << "Warning from G4PenelopeIonisation: problem with energy conservation: " << |
---|
| 613 | (eKineticEnergy+energyInFluorescence+kineticEnergy1+localEnergyDeposit)/keV << |
---|
| 614 | " keV (final) vs. " << |
---|
| 615 | kineticEnergy0/keV << " keV (initial)" << G4endl; |
---|
| 616 | } |
---|
| 617 | } |
---|
| 618 | |
---|
| 619 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 620 | |
---|
| 621 | void G4PenelopeIonisationModel::ReadData() |
---|
| 622 | { |
---|
| 623 | if (verboseLevel > 2) |
---|
| 624 | { |
---|
| 625 | G4cout << "Data from G4PenelopeIonisationModel read " << G4endl; |
---|
| 626 | } |
---|
| 627 | char* path = getenv("G4LEDATA"); |
---|
| 628 | if (!path) |
---|
| 629 | { |
---|
| 630 | G4String excep = "G4PenelopeIonisationModel - G4LEDATA environment variable not set!"; |
---|
| 631 | G4Exception(excep); |
---|
| 632 | } |
---|
| 633 | G4String pathString(path); |
---|
| 634 | G4String pathFile = pathString + "/penelope/ion-pen.dat"; |
---|
| 635 | std::ifstream file(pathFile); |
---|
| 636 | |
---|
| 637 | if (!file.is_open()) |
---|
| 638 | { |
---|
| 639 | G4String excep = "G4PenelopeIonisationModel - data file " + pathFile + " not found!"; |
---|
| 640 | G4Exception(excep); |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | if (!ionizationEnergy || !resonanceEnergy || !occupationNumber || !shellFlag) |
---|
| 644 | { |
---|
| 645 | G4String excep = "G4PenelopeIonisationModel: problem with reading data from file"; |
---|
| 646 | G4Exception(excep); |
---|
| 647 | } |
---|
| 648 | |
---|
| 649 | G4int Z=1,nLevels=0; |
---|
| 650 | G4int test,test1; |
---|
| 651 | |
---|
| 652 | do{ |
---|
| 653 | G4DataVector* occVector = new G4DataVector; |
---|
| 654 | G4DataVector* ionEVector = new G4DataVector; |
---|
| 655 | G4DataVector* resEVector = new G4DataVector; |
---|
| 656 | G4DataVector* shellIndVector = new G4DataVector; |
---|
| 657 | file >> Z >> nLevels; |
---|
| 658 | G4double a1,a2,a3,a4; |
---|
| 659 | G4int k1,k2,k3; |
---|
| 660 | for (G4int h=0;h<nLevels;h++) |
---|
| 661 | { |
---|
| 662 | //index,occup number,ion energy,res energy,fj0,kz,shell flag |
---|
| 663 | file >> k1 >> a1 >> a2 >> a3 >> a4 >> k2 >> k3; |
---|
| 664 | //Make explicit unit of measurements for ionisation and resonance energy, |
---|
| 665 | // which is MeV |
---|
| 666 | a2 *= MeV; |
---|
| 667 | a3 *= MeV; |
---|
| 668 | // |
---|
| 669 | occVector->push_back(a1); |
---|
| 670 | ionEVector->push_back(a2); |
---|
| 671 | resEVector->push_back(a3); |
---|
| 672 | shellIndVector->push_back((G4double) k3); |
---|
| 673 | } |
---|
| 674 | //Ok, done for element Z |
---|
| 675 | occupationNumber->insert(std::make_pair(Z,occVector)); |
---|
| 676 | ionizationEnergy->insert(std::make_pair(Z,ionEVector)); |
---|
| 677 | resonanceEnergy->insert(std::make_pair(Z,resEVector)); |
---|
| 678 | shellFlag->insert(std::make_pair(Z,shellIndVector)); |
---|
| 679 | file >> test >> test1; //-1 -1 close the data for each Z |
---|
| 680 | if (test > 0) { |
---|
| 681 | G4String excep = "G4PenelopeIonisationModel - data file corrupted!"; |
---|
| 682 | G4Exception(excep); |
---|
| 683 | } |
---|
| 684 | }while (test != -2); //the very last Z is closed with -2 instead of -1 |
---|
| 685 | } |
---|
| 686 | |
---|
| 687 | |
---|
| 688 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 689 | |
---|
| 690 | G4double G4PenelopeIonisationModel::CalculateDeltaFermi(G4double kinEnergy ,G4int Z, |
---|
| 691 | G4double electronVolumeDensity) |
---|
| 692 | { |
---|
| 693 | G4double plasmaEnergyCoefficient = 1.377e-39*(MeV*MeV*m3); //(e*hbar)^2/(epsilon0*electron_mass) |
---|
| 694 | G4double plasmaEnergySquared = plasmaEnergyCoefficient*electronVolumeDensity; |
---|
| 695 | // std::sqrt(plasmaEnergySquared) is the plasma energy of the solid (MeV) |
---|
| 696 | G4double gam = 1.0+kinEnergy/electron_mass_c2; |
---|
| 697 | G4double gam2=gam*gam; |
---|
| 698 | G4double delta = 0.0; |
---|
| 699 | |
---|
| 700 | //Density effect |
---|
| 701 | G4double TST = ((G4double) Z)/(gam2*plasmaEnergySquared); |
---|
| 702 | |
---|
| 703 | G4double wl2 = 0.0; |
---|
| 704 | G4double fdel=0.0; |
---|
| 705 | G4double wr=0; |
---|
| 706 | size_t nbOsc = resonanceEnergy->find(Z)->second->size(); |
---|
| 707 | for(size_t i=0;i<nbOsc;i++) |
---|
| 708 | { |
---|
| 709 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 710 | wr = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 711 | fdel += occupNb/(wr*wr+wl2); |
---|
| 712 | } |
---|
| 713 | if (fdel < TST) return delta; |
---|
| 714 | G4double help1 = (*(resonanceEnergy->find(Z)->second))[nbOsc-1]; |
---|
| 715 | wl2 = help1*help1; |
---|
| 716 | do{ |
---|
| 717 | wl2=wl2*2.0; |
---|
| 718 | fdel = 0.0; |
---|
| 719 | for (size_t ii=0;ii<nbOsc;ii++){ |
---|
| 720 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[ii]; |
---|
| 721 | wr = (*(resonanceEnergy->find(Z)->second))[ii]; |
---|
| 722 | fdel += occupNb/(wr*wr+wl2); |
---|
| 723 | } |
---|
| 724 | }while (fdel > TST); |
---|
| 725 | G4double wl2l=0.0; |
---|
| 726 | G4double wl2u = wl2; |
---|
| 727 | G4double control = 0.0; |
---|
| 728 | do{ |
---|
| 729 | wl2=0.5*(wl2l+wl2u); |
---|
| 730 | fdel = 0.0; |
---|
| 731 | for (size_t jj=0;jj<nbOsc;jj++){ |
---|
| 732 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[jj]; |
---|
| 733 | wr = (*(resonanceEnergy->find(Z)->second))[jj]; |
---|
| 734 | fdel += occupNb/(wr*wr+wl2); |
---|
| 735 | } |
---|
| 736 | if (fdel > TST) |
---|
| 737 | wl2l = wl2; |
---|
| 738 | else |
---|
| 739 | wl2u = wl2; |
---|
| 740 | control = wl2u-wl2l-wl2*1e-12; |
---|
| 741 | }while(control>0); |
---|
| 742 | |
---|
| 743 | //Density correction effect |
---|
| 744 | for (size_t kk=0;kk<nbOsc;kk++){ |
---|
| 745 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[kk]; |
---|
| 746 | wr = (*(resonanceEnergy->find(Z)->second))[kk]; |
---|
| 747 | delta += occupNb*std::log(1.0+wl2/(wr*wr)); |
---|
| 748 | } |
---|
| 749 | delta = (delta/((G4double) Z))-wl2/(gam2*plasmaEnergySquared); |
---|
| 750 | return delta; |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 754 | |
---|
| 755 | void G4PenelopeIonisationModel::CalculateDiscreteForElectrons(G4double kinEnergy,G4double cutoffEnergy, |
---|
| 756 | G4int Z,G4double electronVolumeDensity) |
---|
| 757 | { |
---|
| 758 | if (verboseLevel > 2) |
---|
| 759 | G4cout << "Entering in CalculateDiscreteForElectrons() for energy " << |
---|
| 760 | kinEnergy/keV << " keV " << G4endl; |
---|
| 761 | |
---|
| 762 | //Initialization of variables to be calculated in this routine |
---|
| 763 | kineticEnergy1=kinEnergy; |
---|
| 764 | cosThetaPrimary=1.0; |
---|
| 765 | energySecondary=0.0; |
---|
| 766 | cosThetaSecondary=1.0; |
---|
| 767 | iOsc=-1; |
---|
| 768 | |
---|
| 769 | //constants |
---|
| 770 | G4double rb=kinEnergy+2.0*electron_mass_c2; |
---|
| 771 | G4double gamma = 1.0+kinEnergy/electron_mass_c2; |
---|
| 772 | G4double gamma2 = gamma*gamma; |
---|
| 773 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 774 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 775 | G4double cps = kinEnergy*rb; |
---|
| 776 | G4double cp = std::sqrt(cps); |
---|
| 777 | |
---|
| 778 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity); |
---|
| 779 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 780 | |
---|
| 781 | G4double rl,rl1; |
---|
| 782 | |
---|
| 783 | if (cutoffEnergy > kinEnergy) return; //delta rays are not generated |
---|
| 784 | |
---|
| 785 | G4DataVector* qm = new G4DataVector(); |
---|
| 786 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
| 787 | std::vector<G4int> *typeOfInteraction = new std::vector<G4int>; |
---|
| 788 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
| 789 | |
---|
| 790 | //Hard close collisions with outer shells |
---|
| 791 | G4double wmaxc = 0.5*kinEnergy; |
---|
| 792 | G4double closeCS0 = 0.0; |
---|
| 793 | G4double closeCS = 0.0; |
---|
| 794 | if (cutoffEnergy>0.1*eV) |
---|
| 795 | { |
---|
| 796 | rl=cutoffEnergy/kinEnergy; |
---|
| 797 | rl1=1.0-rl; |
---|
| 798 | if (rl < 0.5) |
---|
| 799 | closeCS0 = (amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/kinEnergy; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | // Cross sections for the different oscillators |
---|
| 803 | |
---|
| 804 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
| 805 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
| 806 | // i.e. |
---|
| 807 | // cumulHardCS[0] = 0.0 |
---|
| 808 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
| 809 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
| 810 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
| 811 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
| 812 | // etc. |
---|
| 813 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
| 814 | // interaction. |
---|
| 815 | // |
---|
| 816 | // For each index iFill of the cumulHardCS vector, |
---|
| 817 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
| 818 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
| 819 | // 1 = distant longitudinal interaction |
---|
| 820 | // 2 = distant transverse interaction |
---|
| 821 | // 3 = close collision |
---|
| 822 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
| 823 | |
---|
| 824 | |
---|
| 825 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
| 826 | G4double totalHardCS = 0.0; |
---|
| 827 | G4double involvedElectrons = 0.0; |
---|
| 828 | for (G4int i=0;i<nOscil;i++){ |
---|
| 829 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 830 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 831 | |
---|
| 832 | //Distant excitations |
---|
| 833 | if (wi>cutoffEnergy && wi<kinEnergy) |
---|
| 834 | { |
---|
| 835 | if (wi>(1e-6*kinEnergy)) |
---|
| 836 | { |
---|
| 837 | G4double cpp=std::sqrt((kinEnergy-wi)*(kinEnergy-wi+2.0*electron_mass_c2)); |
---|
| 838 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+electron_mass_c2*electron_mass_c2)-electron_mass_c2); |
---|
| 839 | } |
---|
| 840 | else |
---|
| 841 | { |
---|
| 842 | qm->push_back((wi*wi)/(beta2*2.0*electron_mass_c2)); |
---|
| 843 | } |
---|
| 844 | if ((*qm)[i] < wi) |
---|
| 845 | { |
---|
| 846 | |
---|
| 847 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
| 848 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
| 849 | cumulHardCS->push_back(totalHardCS); |
---|
| 850 | typeOfInteraction->push_back(1); //distant longitudinal |
---|
| 851 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
| 852 | totalHardCS += distantLongitCS; |
---|
| 853 | |
---|
| 854 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
| 855 | |
---|
| 856 | cumulHardCS->push_back(totalHardCS); |
---|
| 857 | typeOfInteraction->push_back(2); //distant tranverse |
---|
| 858 | nbOfLevel->push_back((G4double) i); |
---|
| 859 | totalHardCS += distantTransvCS; |
---|
| 860 | } |
---|
| 861 | } |
---|
| 862 | else |
---|
| 863 | qm->push_back(wi); |
---|
| 864 | |
---|
| 865 | //close collisions |
---|
| 866 | if(wi < wmaxc) |
---|
| 867 | { |
---|
| 868 | if (wi < cutoffEnergy) |
---|
| 869 | involvedElectrons += occupNb; |
---|
| 870 | else |
---|
| 871 | { |
---|
| 872 | rl=wi/kinEnergy; |
---|
| 873 | rl1=1.0-rl; |
---|
| 874 | closeCS = occupNb*(amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/kinEnergy; |
---|
| 875 | cumulHardCS->push_back(totalHardCS); |
---|
| 876 | typeOfInteraction->push_back(3); //close |
---|
| 877 | nbOfLevel->push_back((G4double) i); |
---|
| 878 | totalHardCS += closeCS; |
---|
| 879 | } |
---|
| 880 | } |
---|
| 881 | } // loop on the levels |
---|
| 882 | |
---|
| 883 | cumulHardCS->push_back(totalHardCS); |
---|
| 884 | typeOfInteraction->push_back(4); //close interaction with outer shells |
---|
| 885 | nbOfLevel->push_back(-1.0); |
---|
| 886 | totalHardCS += involvedElectrons*closeCS0; |
---|
| 887 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
| 888 | |
---|
| 889 | if (totalHardCS < 1e-30) { |
---|
| 890 | kineticEnergy1=kinEnergy; |
---|
| 891 | cosThetaPrimary=1.0; |
---|
| 892 | energySecondary=0.0; |
---|
| 893 | cosThetaSecondary=0.0; |
---|
| 894 | iOsc=-1; |
---|
| 895 | delete qm; |
---|
| 896 | delete cumulHardCS; |
---|
| 897 | delete typeOfInteraction; |
---|
| 898 | delete nbOfLevel; |
---|
| 899 | return; |
---|
| 900 | } |
---|
| 901 | |
---|
| 902 | //Testing purposes |
---|
| 903 | if (verboseLevel > 6) |
---|
| 904 | { |
---|
| 905 | for (size_t t=0;t<cumulHardCS->size();t++) |
---|
| 906 | G4cout << (*cumulHardCS)[t] << " " << (*typeOfInteraction)[t] << |
---|
| 907 | " " << (*nbOfLevel)[t] << G4endl; |
---|
| 908 | } |
---|
| 909 | |
---|
| 910 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
| 911 | G4double TST = totalHardCS*G4UniformRand(); |
---|
| 912 | G4int is=0; |
---|
| 913 | G4int js= nbOfLevel->size(); |
---|
| 914 | do{ |
---|
| 915 | G4int it=(is+js)/2; |
---|
| 916 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
| 917 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
| 918 | }while((js-is) > 1); |
---|
| 919 | |
---|
| 920 | G4double UII=0.0; |
---|
| 921 | G4double rkc=cutoffEnergy/kinEnergy; |
---|
| 922 | G4double dde; |
---|
| 923 | G4int kks; |
---|
| 924 | |
---|
| 925 | G4int sampledInteraction = (*typeOfInteraction)[is]; |
---|
| 926 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
| 927 | |
---|
| 928 | if (verboseLevel > 4) |
---|
| 929 | G4cout << "Chosen interaction #:" << sampledInteraction << " on level " << iOsc << G4endl; |
---|
| 930 | |
---|
| 931 | //Generates the final state according to the sampled level and |
---|
| 932 | //interaction channel |
---|
| 933 | |
---|
| 934 | if (sampledInteraction == 1) //Hard distant longitudinal collisions |
---|
| 935 | { |
---|
| 936 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 937 | kineticEnergy1=kinEnergy-dde; |
---|
| 938 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
| 939 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
| 940 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
| 941 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
| 942 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
| 943 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
| 944 | //Energy and emission angle of the delta ray |
---|
| 945 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 946 | //kks > 4 means that we are in an outer shell |
---|
| 947 | if (kks>4) |
---|
| 948 | energySecondary=dde; |
---|
| 949 | else |
---|
| 950 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 951 | |
---|
| 952 | cosThetaSecondary = 0.5*(dde*(kinEnergy+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
| 953 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
| 954 | } |
---|
| 955 | else if (sampledInteraction == 2) //Hard distant transverse collisions |
---|
| 956 | { |
---|
| 957 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 958 | kineticEnergy1=kinEnergy-dde; |
---|
| 959 | cosThetaPrimary=1.0; |
---|
| 960 | //Energy and emission angle of the delta ray |
---|
| 961 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 962 | if (kks>4) |
---|
| 963 | { |
---|
| 964 | energySecondary=dde; |
---|
| 965 | } |
---|
| 966 | else |
---|
| 967 | { |
---|
| 968 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 969 | } |
---|
| 970 | cosThetaSecondary = 1.0; |
---|
| 971 | } |
---|
| 972 | else if (sampledInteraction == 3 || sampledInteraction == 4) //Close interaction |
---|
| 973 | { |
---|
| 974 | if (sampledInteraction == 4) //interaction with inner shells |
---|
| 975 | { |
---|
| 976 | UII=0.0; |
---|
| 977 | rkc = cutoffEnergy/kinEnergy; |
---|
| 978 | iOsc = -1; |
---|
| 979 | } |
---|
| 980 | else |
---|
| 981 | { |
---|
| 982 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 983 | if (kks > 4) { |
---|
| 984 | UII=0.0; |
---|
| 985 | } |
---|
| 986 | else |
---|
| 987 | { |
---|
| 988 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 989 | } |
---|
| 990 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/kinEnergy; |
---|
| 991 | } |
---|
| 992 | G4double A = 0.5*amol; |
---|
| 993 | G4double arkc = A*0.5*rkc; |
---|
| 994 | G4double phi,rk2,rk,rkf; |
---|
| 995 | do{ |
---|
| 996 | G4double fb = (1.0+arkc)*G4UniformRand(); |
---|
| 997 | if (fb<1.0) |
---|
| 998 | { |
---|
| 999 | rk=rkc/(1.0-fb*(1.0-(rkc*2.0))); |
---|
| 1000 | } |
---|
| 1001 | else{ |
---|
| 1002 | rk = rkc+(fb-1.0)*(0.5-rkc)/arkc; |
---|
| 1003 | } |
---|
| 1004 | rk2 = rk*rk; |
---|
| 1005 | rkf = rk/(1.0-rk); |
---|
| 1006 | phi = 1.0+(rkf*rkf)-rkf+amol*(rk2+rkf); |
---|
| 1007 | }while ((G4UniformRand()*(1.0+A*rk2)) > phi); |
---|
| 1008 | //Energy and scattering angle (primary electron); |
---|
| 1009 | kineticEnergy1 = kinEnergy*(1.0-rk); |
---|
| 1010 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(kinEnergy*(rb-(rk*kinEnergy)))); |
---|
| 1011 | //Energy and scattering angle of the delta ray |
---|
| 1012 | energySecondary = kinEnergy-kineticEnergy1-UII; |
---|
| 1013 | cosThetaSecondary = std::sqrt(rk*kinEnergy*rb/(kinEnergy*(rk*kinEnergy+2.0*electron_mass_c2))); |
---|
| 1014 | } |
---|
| 1015 | else |
---|
| 1016 | { |
---|
| 1017 | G4String excep = "G4PenelopeIonisationModel - Error in the calculation of the final state"; |
---|
| 1018 | G4Exception(excep); |
---|
| 1019 | } |
---|
| 1020 | |
---|
| 1021 | delete qm; |
---|
| 1022 | delete cumulHardCS; |
---|
| 1023 | |
---|
| 1024 | delete typeOfInteraction; |
---|
| 1025 | delete nbOfLevel; |
---|
| 1026 | |
---|
| 1027 | return; |
---|
| 1028 | } |
---|
| 1029 | |
---|
| 1030 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1031 | |
---|
| 1032 | void G4PenelopeIonisationModel::CalculateDiscreteForPositrons(G4double kinEnergy,G4double cutoffEnergy, |
---|
| 1033 | G4int Z,G4double electronVolumeDensity) |
---|
| 1034 | { |
---|
| 1035 | kineticEnergy1=kinEnergy; |
---|
| 1036 | cosThetaPrimary=1.0; |
---|
| 1037 | energySecondary=0.0; |
---|
| 1038 | cosThetaSecondary=1.0; |
---|
| 1039 | iOsc=-1; |
---|
| 1040 | //constants |
---|
| 1041 | G4double rb=kinEnergy+2.0*electron_mass_c2; |
---|
| 1042 | G4double gamma = 1.0+kinEnergy/electron_mass_c2; |
---|
| 1043 | G4double gamma2 = gamma*gamma; |
---|
| 1044 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1045 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 1046 | G4double cps = kinEnergy*rb; |
---|
| 1047 | G4double cp = std::sqrt(cps); |
---|
| 1048 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1049 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1050 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1051 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1052 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1053 | |
---|
| 1054 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity); |
---|
| 1055 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 1056 | |
---|
| 1057 | G4double rl,rl1; |
---|
| 1058 | |
---|
| 1059 | if (cutoffEnergy > kinEnergy) return; //delta rays are not generated |
---|
| 1060 | |
---|
| 1061 | G4DataVector* qm = new G4DataVector(); |
---|
| 1062 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
| 1063 | std::vector<G4int> *typeOfInteraction = new std::vector<G4int>; |
---|
| 1064 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
| 1065 | |
---|
| 1066 | |
---|
| 1067 | //Hard close collisions with outer shells |
---|
| 1068 | G4double wmaxc = kinEnergy; |
---|
| 1069 | G4double closeCS0 = 0.0; |
---|
| 1070 | G4double closeCS = 0.0; |
---|
| 1071 | if (cutoffEnergy>0.1*eV) |
---|
| 1072 | { |
---|
| 1073 | rl=cutoffEnergy/kinEnergy; |
---|
| 1074 | rl1=1.0-rl; |
---|
| 1075 | if (rl < 1.0) |
---|
| 1076 | closeCS0 = (((1.0/rl)-1.0) + bha1*std::log(rl) + bha2*rl1 |
---|
| 1077 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
| 1078 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/kinEnergy; |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | // Cross sections for the different oscillators |
---|
| 1082 | |
---|
| 1083 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
| 1084 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
| 1085 | // i.e. |
---|
| 1086 | // cumulHardCS[0] = 0.0 |
---|
| 1087 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
| 1088 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
| 1089 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
| 1090 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
| 1091 | // etc. |
---|
| 1092 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
| 1093 | // interaction. |
---|
| 1094 | // |
---|
| 1095 | // For each index iFill of the cumulHardCS vector, |
---|
| 1096 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
| 1097 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
| 1098 | // 1 = distant longitudinal interaction |
---|
| 1099 | // 2 = distant transverse interaction |
---|
| 1100 | // 3 = close collision |
---|
| 1101 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
| 1102 | |
---|
| 1103 | |
---|
| 1104 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
| 1105 | G4double totalHardCS = 0.0; |
---|
| 1106 | G4double involvedElectrons = 0.0; |
---|
| 1107 | for (G4int i=0;i<nOscil;i++){ |
---|
| 1108 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 1109 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 1110 | //Distant excitations |
---|
| 1111 | if (wi>cutoffEnergy && wi<kinEnergy) |
---|
| 1112 | { |
---|
| 1113 | if (wi>(1e-6*kinEnergy)){ |
---|
| 1114 | G4double cpp=std::sqrt((kinEnergy-wi)*(kinEnergy-wi+2.0*electron_mass_c2)); |
---|
| 1115 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+ electron_mass_c2 * electron_mass_c2)-electron_mass_c2); |
---|
| 1116 | } |
---|
| 1117 | else |
---|
| 1118 | { |
---|
| 1119 | qm->push_back(wi*wi/(beta2+2.0*electron_mass_c2)); |
---|
| 1120 | } |
---|
| 1121 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento |
---|
| 1122 | if ((*qm)[i] < wi) |
---|
| 1123 | { |
---|
| 1124 | |
---|
| 1125 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
| 1126 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
| 1127 | cumulHardCS->push_back(totalHardCS); |
---|
| 1128 | typeOfInteraction->push_back(1); //distant longitudinal |
---|
| 1129 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
| 1130 | totalHardCS += distantLongitCS; |
---|
| 1131 | |
---|
| 1132 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
| 1133 | |
---|
| 1134 | cumulHardCS->push_back(totalHardCS); |
---|
| 1135 | typeOfInteraction->push_back(2); //distant tranverse |
---|
| 1136 | nbOfLevel->push_back((G4double) i); |
---|
| 1137 | totalHardCS += distantTransvCS; |
---|
| 1138 | } |
---|
| 1139 | } |
---|
| 1140 | else |
---|
| 1141 | qm->push_back(wi); |
---|
| 1142 | |
---|
| 1143 | //close collisions |
---|
| 1144 | if(wi < wmaxc) |
---|
| 1145 | { |
---|
| 1146 | if (wi < cutoffEnergy) { |
---|
| 1147 | involvedElectrons += occupNb; |
---|
| 1148 | } |
---|
| 1149 | else |
---|
| 1150 | { |
---|
| 1151 | rl=wi/kinEnergy; |
---|
| 1152 | rl1=1.0-rl; |
---|
| 1153 | closeCS = occupNb*(((1.0/rl)-1.0)+bha1*std::log(rl)+bha2*rl1 |
---|
| 1154 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
| 1155 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/kinEnergy; |
---|
| 1156 | cumulHardCS->push_back(totalHardCS); |
---|
| 1157 | typeOfInteraction->push_back(3); //close |
---|
| 1158 | nbOfLevel->push_back((G4double) i); |
---|
| 1159 | totalHardCS += closeCS; |
---|
| 1160 | } |
---|
| 1161 | } |
---|
| 1162 | } // loop on the levels |
---|
| 1163 | |
---|
| 1164 | cumulHardCS->push_back(totalHardCS); |
---|
| 1165 | typeOfInteraction->push_back(4); //close interaction with outer shells |
---|
| 1166 | nbOfLevel->push_back(-1.0); |
---|
| 1167 | totalHardCS += involvedElectrons*closeCS0; |
---|
| 1168 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
| 1169 | |
---|
| 1170 | if (totalHardCS < 1e-30) { |
---|
| 1171 | kineticEnergy1=kinEnergy; |
---|
| 1172 | cosThetaPrimary=1.0; |
---|
| 1173 | energySecondary=0.0; |
---|
| 1174 | cosThetaSecondary=0.0; |
---|
| 1175 | iOsc=-1; |
---|
| 1176 | delete qm; |
---|
| 1177 | delete cumulHardCS; |
---|
| 1178 | delete typeOfInteraction; |
---|
| 1179 | delete nbOfLevel; |
---|
| 1180 | return; |
---|
| 1181 | } |
---|
| 1182 | |
---|
| 1183 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
| 1184 | G4double TST = totalHardCS*G4UniformRand(); |
---|
| 1185 | G4int is=0; |
---|
| 1186 | G4int js= nbOfLevel->size(); |
---|
| 1187 | do{ |
---|
| 1188 | G4int it=(is+js)/2; |
---|
| 1189 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
| 1190 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
| 1191 | }while((js-is) > 1); |
---|
| 1192 | |
---|
| 1193 | G4double UII=0.0; |
---|
| 1194 | G4double rkc=cutoffEnergy/kinEnergy; |
---|
| 1195 | G4double dde; |
---|
| 1196 | G4int kks; |
---|
| 1197 | |
---|
| 1198 | G4int sampledInteraction = (*typeOfInteraction)[is]; |
---|
| 1199 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
| 1200 | |
---|
| 1201 | //Generates the final state according to the sampled level and |
---|
| 1202 | //interaction channel |
---|
| 1203 | |
---|
| 1204 | if (sampledInteraction == 1) //Hard distant longitudinal collisions |
---|
| 1205 | { |
---|
| 1206 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 1207 | kineticEnergy1=kinEnergy-dde; |
---|
| 1208 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
| 1209 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
| 1210 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
| 1211 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
| 1212 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
| 1213 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
| 1214 | //Energy and emission angle of the delta ray |
---|
| 1215 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1216 | if (kks>4) |
---|
| 1217 | energySecondary=dde; |
---|
| 1218 | |
---|
| 1219 | else |
---|
| 1220 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1221 | cosThetaSecondary = 0.5*(dde*(kinEnergy+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
| 1222 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
| 1223 | } |
---|
| 1224 | else if (sampledInteraction == 2) //Hard distant transverse collisions |
---|
| 1225 | { |
---|
| 1226 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 1227 | kineticEnergy1=kinEnergy-dde; |
---|
| 1228 | cosThetaPrimary=1.0; |
---|
| 1229 | //Energy and emission angle of the delta ray |
---|
| 1230 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1231 | if (kks>4) |
---|
| 1232 | { |
---|
| 1233 | energySecondary=dde; |
---|
| 1234 | } |
---|
| 1235 | else |
---|
| 1236 | { |
---|
| 1237 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1238 | } |
---|
| 1239 | cosThetaSecondary = 1.0; |
---|
| 1240 | } |
---|
| 1241 | else if (sampledInteraction == 3 || sampledInteraction == 4) //Close interaction |
---|
| 1242 | { |
---|
| 1243 | if (sampledInteraction == 4) //interaction with inner shells |
---|
| 1244 | { |
---|
| 1245 | UII=0.0; |
---|
| 1246 | rkc = cutoffEnergy/kinEnergy; |
---|
| 1247 | iOsc = -1; |
---|
| 1248 | } |
---|
| 1249 | else |
---|
| 1250 | { |
---|
| 1251 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1252 | if (kks > 4) { |
---|
| 1253 | UII=0.0; |
---|
| 1254 | } |
---|
| 1255 | else |
---|
| 1256 | { |
---|
| 1257 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1258 | } |
---|
| 1259 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/kinEnergy; |
---|
| 1260 | } |
---|
| 1261 | G4double phi,rk; |
---|
| 1262 | do{ |
---|
| 1263 | rk=rkc/(1.0-G4UniformRand()*(1.0-rkc)); |
---|
| 1264 | phi = 1.0-rk*(bha1-rk*(bha2-rk*(bha3-bha4*rk))); |
---|
| 1265 | }while ( G4UniformRand() > phi); |
---|
| 1266 | //Energy and scattering angle (primary electron); |
---|
| 1267 | kineticEnergy1 = kinEnergy*(1.0-rk); |
---|
| 1268 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(kinEnergy*(rb-(rk*kinEnergy)))); |
---|
| 1269 | //Energy and scattering angle of the delta ray |
---|
| 1270 | energySecondary = kinEnergy-kineticEnergy1-UII; |
---|
| 1271 | cosThetaSecondary = std::sqrt(rk*kinEnergy*rb/(kinEnergy*(rk*kinEnergy+2.0*electron_mass_c2))); |
---|
| 1272 | } |
---|
| 1273 | else |
---|
| 1274 | { |
---|
| 1275 | G4String excep = "G4PenelopeIonisationModel - Error in the calculation of the final state"; |
---|
| 1276 | G4Exception(excep); |
---|
| 1277 | } |
---|
| 1278 | |
---|
| 1279 | delete qm; |
---|
| 1280 | delete cumulHardCS; |
---|
| 1281 | delete typeOfInteraction; |
---|
| 1282 | delete nbOfLevel; |
---|
| 1283 | |
---|
| 1284 | return; |
---|
| 1285 | } |
---|
| 1286 | |
---|
| 1287 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1288 | |
---|
| 1289 | G4double G4PenelopeIonisationModel::CalculateCrossSectionsRatio(G4double kinEnergy, |
---|
| 1290 | G4double cutoffEnergy, |
---|
| 1291 | G4int Z, G4double electronVolumeDensity, |
---|
| 1292 | const G4ParticleDefinition* theParticle) |
---|
| 1293 | { |
---|
| 1294 | //Constants |
---|
| 1295 | G4double gamma = 1.0+kinEnergy/electron_mass_c2; |
---|
| 1296 | G4double gamma2 = gamma*gamma; |
---|
| 1297 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1298 | G4double constant = pi*classic_electr_radius*classic_electr_radius*2.0*electron_mass_c2/beta2; |
---|
| 1299 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity); |
---|
| 1300 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size(); |
---|
| 1301 | G4double softCS = 0.0; |
---|
| 1302 | G4double hardCS = 0.0; |
---|
| 1303 | for (G4int i=0;i<nbOsc;i++){ |
---|
| 1304 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 1305 | std::pair<G4double,G4double> SoftAndHardXS(0.,0.); |
---|
| 1306 | if (theParticle == G4Electron::Electron()) |
---|
| 1307 | SoftAndHardXS = CrossSectionsRatioForElectrons(kinEnergy,resEnergy,delta,cutoffEnergy); |
---|
| 1308 | else if (theParticle == G4Positron::Positron()) |
---|
| 1309 | SoftAndHardXS = CrossSectionsRatioForPositrons(kinEnergy,resEnergy,delta,cutoffEnergy); |
---|
| 1310 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i]; |
---|
| 1311 | softCS += occupNb*constant*SoftAndHardXS.first; |
---|
| 1312 | hardCS += occupNb*constant*SoftAndHardXS.second; |
---|
| 1313 | } |
---|
| 1314 | G4double ratio = 0.0; |
---|
| 1315 | |
---|
| 1316 | if (softCS+hardCS) ratio = (hardCS)/(softCS+hardCS); |
---|
| 1317 | return ratio; |
---|
| 1318 | } |
---|
| 1319 | |
---|
| 1320 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1321 | |
---|
| 1322 | std::pair<G4double,G4double> G4PenelopeIonisationModel::CrossSectionsRatioForElectrons(G4double kineticEnergy, |
---|
| 1323 | G4double resEnergy, |
---|
| 1324 | G4double densityCorrection, |
---|
| 1325 | G4double cutoffEnergy) |
---|
| 1326 | { |
---|
| 1327 | std::pair<G4double,G4double> theResult(0.,0.); |
---|
| 1328 | if (kineticEnergy < resEnergy) return theResult; |
---|
| 1329 | |
---|
| 1330 | //Calculate constants |
---|
| 1331 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2; |
---|
| 1332 | G4double gamma2 = gamma*gamma; |
---|
| 1333 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1334 | G4double cps = kineticEnergy*(kineticEnergy+2.0*electron_mass_c2); |
---|
| 1335 | G4double amol = (kineticEnergy/(kineticEnergy+electron_mass_c2)) * (kineticEnergy/(kineticEnergy+electron_mass_c2)) ; |
---|
| 1336 | G4double hardCont = 0.0; |
---|
| 1337 | G4double softCont = 0.0; |
---|
| 1338 | |
---|
| 1339 | //Distant interactions |
---|
| 1340 | G4double cp1s = (kineticEnergy-resEnergy)*(kineticEnergy-resEnergy+2.0*electron_mass_c2); |
---|
| 1341 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1342 | G4double cp = std::sqrt(cps); |
---|
| 1343 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1344 | |
---|
| 1345 | //Distant longitudinal interactions |
---|
| 1346 | G4double qm = 0.0; |
---|
| 1347 | |
---|
| 1348 | if (resEnergy > kineticEnergy*(1e-6)) |
---|
| 1349 | { |
---|
| 1350 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1351 | } |
---|
| 1352 | else |
---|
| 1353 | { |
---|
| 1354 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2); |
---|
| 1355 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1356 | } |
---|
| 1357 | |
---|
| 1358 | if (qm < resEnergy) |
---|
| 1359 | { |
---|
| 1360 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2))); |
---|
| 1361 | } |
---|
| 1362 | else |
---|
| 1363 | { |
---|
| 1364 | sdLong = 0.0; |
---|
| 1365 | } |
---|
| 1366 | |
---|
| 1367 | if (sdLong > 0) { |
---|
| 1368 | sdTrans = std::max(std::log(gamma2)-beta2-densityCorrection,0.0); |
---|
| 1369 | sdDist = sdTrans + sdLong; |
---|
| 1370 | if (cutoffEnergy > resEnergy) |
---|
| 1371 | { |
---|
| 1372 | softCont = sdDist/resEnergy; |
---|
| 1373 | } |
---|
| 1374 | else |
---|
| 1375 | { |
---|
| 1376 | hardCont = sdDist/resEnergy; |
---|
| 1377 | } |
---|
| 1378 | } |
---|
| 1379 | |
---|
| 1380 | // Close collisions (Moeller's cross section) |
---|
| 1381 | G4double wl = std::max(cutoffEnergy,resEnergy); |
---|
| 1382 | G4double wu = 0.5*kineticEnergy; |
---|
| 1383 | |
---|
| 1384 | if (wl < (wu-1*eV)) |
---|
| 1385 | { |
---|
| 1386 | hardCont += (1.0/(kineticEnergy-wu))-(1.0/(kineticEnergy-wl)) |
---|
| 1387 | - (1.0/wu)+(1.0/wl) |
---|
| 1388 | + (1.0-amol)*std::log(((kineticEnergy-wu)*wl)/((kineticEnergy-wl)*wu))/kineticEnergy |
---|
| 1389 | + amol*(wu-wl)/(kineticEnergy*kineticEnergy); |
---|
| 1390 | wu=wl; |
---|
| 1391 | } |
---|
| 1392 | |
---|
| 1393 | wl = resEnergy; |
---|
| 1394 | if (wl > (wu-1*eV)) |
---|
| 1395 | { |
---|
| 1396 | theResult.first = softCont; |
---|
| 1397 | theResult.second = hardCont; |
---|
| 1398 | return theResult; |
---|
| 1399 | } |
---|
| 1400 | softCont += (1.0/(kineticEnergy-wu))-(1.0/(kineticEnergy-wl)) |
---|
| 1401 | - (1.0/wu)+(1.0/wl) |
---|
| 1402 | + (1.0-amol)*std::log(((kineticEnergy-wu)*wl)/((kineticEnergy-wl)*wu))/kineticEnergy |
---|
| 1403 | + amol*(wu-wl)/(kineticEnergy*kineticEnergy); |
---|
| 1404 | theResult.first = softCont; |
---|
| 1405 | theResult.second = hardCont; |
---|
| 1406 | return theResult; |
---|
| 1407 | } |
---|
| 1408 | |
---|
| 1409 | |
---|
| 1410 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1411 | |
---|
| 1412 | std::pair<G4double,G4double> G4PenelopeIonisationModel::CrossSectionsRatioForPositrons(G4double kineticEnergy, |
---|
| 1413 | G4double resEnergy, |
---|
| 1414 | G4double densityCorrection, |
---|
| 1415 | G4double cutoffEnergy) |
---|
| 1416 | { |
---|
| 1417 | |
---|
| 1418 | std::pair<G4double,G4double> theResult(0.,0.); |
---|
| 1419 | if (kineticEnergy < resEnergy) return theResult; |
---|
| 1420 | |
---|
| 1421 | //Calculate constants |
---|
| 1422 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2; |
---|
| 1423 | G4double gamma2 = gamma*gamma; |
---|
| 1424 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1425 | G4double cps = kineticEnergy*(kineticEnergy+2.0*electron_mass_c2); |
---|
| 1426 | G4double amol = (kineticEnergy/(kineticEnergy+electron_mass_c2)) * (kineticEnergy/(kineticEnergy+electron_mass_c2)) ; |
---|
| 1427 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1428 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1429 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1430 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1431 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1432 | G4double hardCont = 0.0; |
---|
| 1433 | G4double softCont = 0.0; |
---|
| 1434 | |
---|
| 1435 | //Distant interactions |
---|
| 1436 | G4double cp1s = (kineticEnergy-resEnergy)*(kineticEnergy-resEnergy+2.0*electron_mass_c2); |
---|
| 1437 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1438 | G4double cp = std::sqrt(cps); |
---|
| 1439 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1440 | |
---|
| 1441 | //Distant longitudinal interactions |
---|
| 1442 | G4double qm = 0.0; |
---|
| 1443 | |
---|
| 1444 | if (resEnergy > kineticEnergy*(1e-6)) |
---|
| 1445 | { |
---|
| 1446 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1447 | } |
---|
| 1448 | else |
---|
| 1449 | { |
---|
| 1450 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2); |
---|
| 1451 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1452 | } |
---|
| 1453 | |
---|
| 1454 | if (qm < resEnergy) |
---|
| 1455 | { |
---|
| 1456 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2))); |
---|
| 1457 | } |
---|
| 1458 | else |
---|
| 1459 | { |
---|
| 1460 | sdLong = 0.0; |
---|
| 1461 | } |
---|
| 1462 | |
---|
| 1463 | if (sdLong > 0) { |
---|
| 1464 | sdTrans = std::max(std::log(gamma2)-beta2-densityCorrection,0.0); |
---|
| 1465 | sdDist = sdTrans + sdLong; |
---|
| 1466 | if (cutoffEnergy > resEnergy) |
---|
| 1467 | { |
---|
| 1468 | softCont = sdDist/resEnergy; |
---|
| 1469 | } |
---|
| 1470 | else |
---|
| 1471 | { |
---|
| 1472 | hardCont = sdDist/resEnergy; |
---|
| 1473 | } |
---|
| 1474 | } |
---|
| 1475 | |
---|
| 1476 | |
---|
| 1477 | // Close collisions (Bhabha's cross section) |
---|
| 1478 | G4double wl = std::max(cutoffEnergy,resEnergy); |
---|
| 1479 | G4double wu = kineticEnergy; |
---|
| 1480 | |
---|
| 1481 | if (wl < (wu-1*eV)) { |
---|
| 1482 | hardCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/kineticEnergy |
---|
| 1483 | + bha2*(wu-wl)/(kineticEnergy*kineticEnergy) |
---|
| 1484 | -bha3*((wu*wu)-(wl*wl))/(2.0*kineticEnergy*kineticEnergy*kineticEnergy) |
---|
| 1485 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*kineticEnergy*kineticEnergy*kineticEnergy*kineticEnergy); |
---|
| 1486 | wu=wl; |
---|
| 1487 | } |
---|
| 1488 | wl = resEnergy; |
---|
| 1489 | if (wl > (wu-1*eV)) |
---|
| 1490 | { |
---|
| 1491 | theResult.first = softCont; |
---|
| 1492 | theResult.second = hardCont; |
---|
| 1493 | return theResult; |
---|
| 1494 | } |
---|
| 1495 | softCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/kineticEnergy |
---|
| 1496 | + bha2*(wu-wl)/(kineticEnergy*kineticEnergy) |
---|
| 1497 | -bha3*((wu*wu)-(wl*wl))/(2.0*kineticEnergy*kineticEnergy*kineticEnergy) |
---|
| 1498 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*kineticEnergy*kineticEnergy*kineticEnergy*kineticEnergy); |
---|
| 1499 | |
---|
| 1500 | |
---|
| 1501 | theResult.first = softCont; |
---|
| 1502 | theResult.second = hardCont; |
---|
| 1503 | return theResult; |
---|
| 1504 | |
---|
| 1505 | } |
---|
| 1506 | |
---|
| 1507 | G4double G4PenelopeIonisationModel::ComputeStoppingPowerForElectrons(G4double kinEnergy, |
---|
| 1508 | G4double cutEnergy, |
---|
| 1509 | G4double deltaFermi, |
---|
| 1510 | G4double resEnergy) |
---|
| 1511 | { |
---|
| 1512 | //Calculate constants |
---|
| 1513 | G4double gamma = 1.0+kinEnergy/electron_mass_c2; |
---|
| 1514 | G4double gamma2 = gamma*gamma; |
---|
| 1515 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1516 | G4double cps = kinEnergy*(kinEnergy+2.0*electron_mass_c2); |
---|
| 1517 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 1518 | G4double sPower = 0.0; |
---|
| 1519 | if (kinEnergy < resEnergy) return sPower; |
---|
| 1520 | |
---|
| 1521 | //Distant interactions |
---|
| 1522 | G4double cp1s = (kinEnergy-resEnergy)*(kinEnergy-resEnergy+2.0*electron_mass_c2); |
---|
| 1523 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1524 | G4double cp = std::sqrt(cps); |
---|
| 1525 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1526 | |
---|
| 1527 | //Distant longitudinal interactions |
---|
| 1528 | G4double qm = 0.0; |
---|
| 1529 | |
---|
| 1530 | if (resEnergy > kinEnergy*(1e-6)) |
---|
| 1531 | { |
---|
| 1532 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1533 | } |
---|
| 1534 | else |
---|
| 1535 | { |
---|
| 1536 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2); |
---|
| 1537 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1538 | } |
---|
| 1539 | |
---|
| 1540 | if (qm < resEnergy) |
---|
| 1541 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2))); |
---|
| 1542 | else |
---|
| 1543 | sdLong = 0.0; |
---|
| 1544 | |
---|
| 1545 | if (sdLong > 0) { |
---|
| 1546 | sdTrans = std::max(std::log(gamma2)-beta2-deltaFermi,0.0); |
---|
| 1547 | sdDist = sdTrans + sdLong; |
---|
| 1548 | if (cutEnergy > resEnergy) sPower = sdDist; |
---|
| 1549 | } |
---|
| 1550 | |
---|
| 1551 | |
---|
| 1552 | // Close collisions (Moeller's cross section) |
---|
| 1553 | G4double wl = std::max(cutEnergy,resEnergy); |
---|
| 1554 | G4double wu = 0.5*kinEnergy; |
---|
| 1555 | |
---|
| 1556 | if (wl < (wu-1*eV)) wu=wl; |
---|
| 1557 | wl = resEnergy; |
---|
| 1558 | if (wl > (wu-1*eV)) return sPower; |
---|
| 1559 | sPower += std::log(wu/wl)+(kinEnergy/(kinEnergy-wu))-(kinEnergy/(kinEnergy-wl)) |
---|
| 1560 | + (2.0 - amol)*std::log((kinEnergy-wu)/(kinEnergy-wl)) |
---|
| 1561 | + amol*((wu*wu)-(wl*wl))/(2.0*kinEnergy*kinEnergy); |
---|
| 1562 | return sPower; |
---|
| 1563 | } |
---|
| 1564 | |
---|
| 1565 | |
---|
| 1566 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1567 | |
---|
| 1568 | G4double G4PenelopeIonisationModel::ComputeStoppingPowerForPositrons(G4double kinEnergy, |
---|
| 1569 | G4double cutEnergy, |
---|
| 1570 | G4double deltaFermi, |
---|
| 1571 | G4double resEnergy) |
---|
| 1572 | { |
---|
| 1573 | //Calculate constants |
---|
| 1574 | G4double gamma = 1.0+kinEnergy/electron_mass_c2; |
---|
| 1575 | G4double gamma2 = gamma*gamma; |
---|
| 1576 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1577 | G4double cps = kinEnergy*(kinEnergy+2.0*electron_mass_c2); |
---|
| 1578 | G4double amol = (kinEnergy/(kinEnergy+electron_mass_c2)) * (kinEnergy/(kinEnergy+electron_mass_c2)); |
---|
| 1579 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1580 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1581 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1582 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1583 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1584 | |
---|
| 1585 | G4double sPower = 0.0; |
---|
| 1586 | if (kinEnergy < resEnergy) return sPower; |
---|
| 1587 | |
---|
| 1588 | //Distant interactions |
---|
| 1589 | G4double cp1s = (kinEnergy-resEnergy)*(kinEnergy-resEnergy+2.0*electron_mass_c2); |
---|
| 1590 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1591 | G4double cp = std::sqrt(cps); |
---|
| 1592 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1593 | |
---|
| 1594 | //Distant longitudinal interactions |
---|
| 1595 | G4double qm = 0.0; |
---|
| 1596 | |
---|
| 1597 | if (resEnergy > kinEnergy*(1e-6)) |
---|
| 1598 | { |
---|
| 1599 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1600 | } |
---|
| 1601 | else |
---|
| 1602 | { |
---|
| 1603 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2); |
---|
| 1604 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1605 | } |
---|
| 1606 | |
---|
| 1607 | if (qm < resEnergy) |
---|
| 1608 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2))); |
---|
| 1609 | else |
---|
| 1610 | sdLong = 0.0; |
---|
| 1611 | |
---|
| 1612 | if (sdLong > 0) { |
---|
| 1613 | sdTrans = std::max(std::log(gamma2)-beta2-deltaFermi,0.0); |
---|
| 1614 | sdDist = sdTrans + sdLong; |
---|
| 1615 | if (cutEnergy > resEnergy) sPower = sdDist; |
---|
| 1616 | } |
---|
| 1617 | |
---|
| 1618 | |
---|
| 1619 | // Close collisions (Bhabha's cross section) |
---|
| 1620 | G4double wl = std::max(cutEnergy,resEnergy); |
---|
| 1621 | G4double wu = kinEnergy; |
---|
| 1622 | |
---|
| 1623 | if (wl < (wu-1*eV)) wu=wl; |
---|
| 1624 | wl = resEnergy; |
---|
| 1625 | if (wl > (wu-1*eV)) return sPower; |
---|
| 1626 | sPower += std::log(wu/wl)-bha1*(wu-wl)/kinEnergy |
---|
| 1627 | + bha2*((wu*wu)-(wl*wl))/(2.0*kinEnergy*kinEnergy) |
---|
| 1628 | - bha3*((wu*wu*wu)-(wl*wl*wl))/(3.0*kinEnergy*kinEnergy*kinEnergy) |
---|
| 1629 | + bha4*((wu*wu*wu*wu)-(wl*wl*wl*wl))/(4.0*kinEnergy*kinEnergy*kinEnergy*kinEnergy); |
---|
| 1630 | return sPower; |
---|
| 1631 | } |
---|
| 1632 | |
---|
| 1633 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo... |
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| 1634 | |
---|
| 1635 | /* Notice: the methods here above are only temporary. They will become obsolete in a while */ |
---|
| 1636 | |
---|
| 1637 | #include "G4VDataSetAlgorithm.hh" |
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| 1638 | #include "G4LinLogLogInterpolation.hh" |
---|
| 1639 | #include "G4CompositeEMDataSet.hh" |
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| 1640 | #include "G4EMDataSet.hh" |
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| 1641 | |
---|
| 1642 | std::vector<G4VEMDataSet*>* G4PenelopeIonisationModel::BuildCrossSectionTable(const |
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| 1643 | G4ParticleDefinition* theParticle) |
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| 1644 | { |
---|
| 1645 | std::vector<G4VEMDataSet*>* set = new std::vector<G4VEMDataSet*>; |
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| 1646 | |
---|
| 1647 | size_t nOfBins = 200; |
---|
| 1648 | G4PhysicsLogVector* theLogVector = new G4PhysicsLogVector(LowEnergyLimit(), |
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| 1649 | HighEnergyLimit(), |
---|
| 1650 | nOfBins); |
---|
| 1651 | G4DataVector* energies; |
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| 1652 | G4DataVector* cs; |
---|
| 1653 | |
---|
| 1654 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 1655 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 1656 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
| 1657 | |
---|
| 1658 | |
---|
| 1659 | for (size_t m=0; m<numOfCouples; m++) |
---|
| 1660 | { |
---|
| 1661 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m); |
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| 1662 | const G4Material* material= couple->GetMaterial(); |
---|
| 1663 | const G4ElementVector* elementVector = material->GetElementVector(); |
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| 1664 | const G4double* nAtomsPerVolume = material->GetAtomicNumDensityVector(); |
---|
| 1665 | G4double electronVolumeDensity = |
---|
| 1666 | material->GetTotNbOfElectPerVolume(); //electron density |
---|
| 1667 | G4int nElements = material->GetNumberOfElements(); |
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| 1668 | |
---|
| 1669 | G4double tcut = (*(theCoupleTable->GetEnergyCutsVector(1)))[couple->GetIndex()]; |
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| 1670 | |
---|
| 1671 | G4VDataSetAlgorithm* algo = new G4LinLogLogInterpolation(); |
---|
| 1672 | |
---|
| 1673 | G4VEMDataSet* setForMat = new G4CompositeEMDataSet(algo,1.,1.); |
---|
| 1674 | |
---|
| 1675 | for (G4int i=0; i<nElements; i++) |
---|
| 1676 | { |
---|
| 1677 | G4int iZ = (G4int) (*elementVector)[i]->GetZ(); |
---|
| 1678 | energies = new G4DataVector; |
---|
| 1679 | cs = new G4DataVector; |
---|
| 1680 | G4double density = nAtomsPerVolume[i]; |
---|
| 1681 | for (size_t bin=0; bin<nOfBins; bin++) |
---|
| 1682 | { |
---|
| 1683 | G4double e = theLogVector->GetLowEdgeEnergy(bin); |
---|
| 1684 | energies->push_back(e); |
---|
| 1685 | G4double value = 0.0; |
---|
| 1686 | if(e > tcut) |
---|
| 1687 | { |
---|
| 1688 | G4double ratio = CalculateCrossSectionsRatio(e,tcut,iZ, |
---|
| 1689 | electronVolumeDensity, |
---|
| 1690 | theParticle); |
---|
| 1691 | value = crossSectionHandler->FindValue(iZ,e)*ratio*density; |
---|
| 1692 | } |
---|
| 1693 | cs->push_back(value); |
---|
| 1694 | } |
---|
| 1695 | G4VDataSetAlgorithm* algo1 = algo->Clone(); |
---|
| 1696 | G4VEMDataSet* elSet = new G4EMDataSet(i,energies,cs,algo1,1.,1.); |
---|
| 1697 | setForMat->AddComponent(elSet); |
---|
| 1698 | } |
---|
| 1699 | set->push_back(setForMat); |
---|
| 1700 | } |
---|
| 1701 | return set; |
---|
| 1702 | } |
---|
| 1703 | |
---|
| 1704 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo... |
---|
| 1705 | |
---|
| 1706 | G4int G4PenelopeIonisationModel::SampleRandomAtom(const G4MaterialCutsCouple* couple, |
---|
| 1707 | G4double e) const |
---|
| 1708 | { |
---|
| 1709 | // Select randomly an element within the material, according to the weight |
---|
| 1710 | // determined by the cross sections in the data set |
---|
| 1711 | |
---|
| 1712 | const G4Material* material = couple->GetMaterial(); |
---|
| 1713 | G4int nElements = material->GetNumberOfElements(); |
---|
| 1714 | |
---|
| 1715 | // Special case: the material consists of one element |
---|
| 1716 | if (nElements == 1) |
---|
| 1717 | { |
---|
| 1718 | G4int Z = (G4int) material->GetZ(); |
---|
| 1719 | return Z; |
---|
| 1720 | } |
---|
| 1721 | |
---|
| 1722 | // Composite material |
---|
| 1723 | const G4ElementVector* elementVector = material->GetElementVector(); |
---|
| 1724 | size_t materialIndex = couple->GetIndex(); |
---|
| 1725 | |
---|
| 1726 | G4VEMDataSet* materialSet = (*theXSTable)[materialIndex]; |
---|
| 1727 | G4double materialCrossSection0 = 0.0; |
---|
| 1728 | G4DataVector cross; |
---|
| 1729 | cross.clear(); |
---|
| 1730 | for ( G4int i=0; i < nElements; i++ ) |
---|
| 1731 | { |
---|
| 1732 | G4double cr = materialSet->GetComponent(i)->FindValue(e); |
---|
| 1733 | materialCrossSection0 += cr; |
---|
| 1734 | cross.push_back(materialCrossSection0); |
---|
| 1735 | } |
---|
| 1736 | |
---|
| 1737 | G4double random = G4UniformRand() * materialCrossSection0; |
---|
| 1738 | |
---|
| 1739 | for (G4int k=0 ; k < nElements ; k++ ) |
---|
| 1740 | { |
---|
| 1741 | if (random <= cross[k]) return (G4int) (*elementVector)[k]->GetZ(); |
---|
| 1742 | } |
---|
| 1743 | // It should never get here |
---|
| 1744 | return 0; |
---|
| 1745 | } |
---|
| 1746 | |
---|
| 1747 | |
---|