[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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[1340] | 26 | // $Id: G4ElectronIonPair.cc,v 1.5 2010/10/25 17:23:01 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: emutils-V09-03-23 $ |
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[968] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4ElectronIonPair |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 08.07.2008 |
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| 39 | // |
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| 40 | // Modifications: |
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| 41 | // |
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| 42 | // ------------------------------------------------------------- |
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| 43 | |
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| 44 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 45 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 46 | |
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| 47 | #include "G4ElectronIonPair.hh" |
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| 48 | #include "G4Material.hh" |
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| 49 | #include "G4MaterialTable.hh" |
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| 50 | #include "G4StepPoint.hh" |
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| 51 | #include "G4VProcess.hh" |
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| 52 | #include "G4ProcessType.hh" |
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| 53 | #include "G4Track.hh" |
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| 54 | #include "Randomize.hh" |
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| 55 | |
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| 56 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 57 | |
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| 58 | G4ElectronIonPair::G4ElectronIonPair() |
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| 59 | { |
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| 60 | verbose = 1; |
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| 61 | curMaterial = 0; |
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| 62 | curMeanEnergy = 0.0; |
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| 63 | nMaterials = 0; |
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[1340] | 64 | FanoFactor = 0.2; |
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[968] | 65 | Initialise(); |
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| 66 | } |
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| 67 | |
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| 68 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 69 | |
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| 70 | G4ElectronIonPair::~G4ElectronIonPair() |
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| 71 | {} |
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| 72 | |
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| 73 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 74 | |
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| 75 | G4double G4ElectronIonPair::MeanNumberOfIonsAlongStep( |
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| 76 | const G4ParticleDefinition* part, |
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| 77 | const G4Material* material, |
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| 78 | G4double edep, |
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| 79 | G4double niel) |
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| 80 | { |
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| 81 | G4double nion = 0.0; |
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| 82 | |
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| 83 | // NIEL does not provide ionisation clusters |
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| 84 | if(edep > niel) { |
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| 85 | |
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| 86 | // neutral particles do not produce ionisation along step |
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| 87 | if(part->GetPDGCharge() != 0.0) { |
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| 88 | |
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| 89 | // select material |
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| 90 | if(material != curMaterial) { |
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| 91 | curMaterial = material; |
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| 92 | curMeanEnergy = material->GetIonisation()->GetMeanEnergyPerIonPair(); |
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| 93 | |
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| 94 | // if mean energy is not defined then look into G4 DB |
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| 95 | if(0.0 == curMeanEnergy) { |
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| 96 | curMeanEnergy = FindG4MeanEnergyPerIonPair(material); |
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| 97 | } |
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| 98 | } |
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[1340] | 99 | if(curMeanEnergy > 0.0) { nion = (edep - niel)/curMeanEnergy; } |
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[968] | 100 | } |
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| 101 | } |
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| 102 | return nion; |
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| 103 | } |
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| 104 | |
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| 105 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 106 | |
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| 107 | std::vector<G4ThreeVector>* |
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[1340] | 108 | G4ElectronIonPair::SampleIonsAlongStep(const G4Step* step) |
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[968] | 109 | { |
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[1340] | 110 | std::vector<G4ThreeVector>* v = 0; |
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[968] | 111 | |
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[1340] | 112 | G4int nion = SampleNumberOfIonsAlongStep(step); |
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[968] | 113 | |
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| 114 | // sample ionisation along step |
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| 115 | if(nion > 0) { |
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| 116 | |
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[1340] | 117 | v = new std::vector<G4ThreeVector>; |
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| 118 | G4ThreeVector prePos = step->GetPreStepPoint()->GetPosition(); |
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| 119 | G4ThreeVector deltaPos = step->GetPostStepPoint()->GetPosition() - prePos; |
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| 120 | for(G4int i=0; i<nion; ++i) { |
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[968] | 121 | v->push_back( prePos + deltaPos*G4UniformRand() ); |
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| 122 | } |
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| 123 | if(verbose > 1 ) { |
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| 124 | G4cout << "### G4ElectronIonPair::SampleIonisationPoints: " |
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| 125 | << v->size() << " ion pairs are added" << G4endl; |
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| 126 | } |
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| 127 | } |
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| 128 | return v; |
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| 129 | } |
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| 130 | |
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| 131 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 132 | |
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| 133 | G4int G4ElectronIonPair::ResidualeChargePostStep(const G4ParticleDefinition*, |
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| 134 | const G4TrackVector*, |
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| 135 | G4int subType) |
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| 136 | { |
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| 137 | G4int nholes = 0; |
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| 138 | |
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[1340] | 139 | if(2 == subType || 12 == subType || 13 == subType) { nholes = 1; } |
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[968] | 140 | return nholes; |
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| 141 | } |
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| 142 | |
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| 143 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 144 | |
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| 145 | G4double G4ElectronIonPair::FindG4MeanEnergyPerIonPair(const G4Material* mat) |
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| 146 | { |
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| 147 | G4String name = mat->GetName(); |
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| 148 | G4double res = 0.0; |
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| 149 | |
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| 150 | // is this material in the vector? |
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| 151 | for(G4int j=0; j<nMaterials; j++) { |
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| 152 | if(name == g4MatNames[j]) { |
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| 153 | res = g4MatData[j]; |
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| 154 | mat->GetIonisation()->SetMeanEnergyPerIonPair(res); |
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| 155 | if(verbose > 0) { |
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| 156 | G4cout << "### G4ElectronIonPair::FindG4MeanEnergyPerIonPair for " |
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| 157 | << name << " Epair= " << res/eV << " eV is set" |
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| 158 | << G4endl; |
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| 159 | } |
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| 160 | break; |
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| 161 | } |
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| 162 | } |
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| 163 | return res; |
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| 164 | } |
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| 165 | |
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| 166 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 167 | |
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| 168 | void G4ElectronIonPair:: DumpMeanEnergyPerIonPair() |
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| 169 | { |
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| 170 | G4int nmat = G4Material::GetNumberOfMaterials(); |
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| 171 | const G4MaterialTable* mtable = G4Material::GetMaterialTable(); |
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| 172 | if(nmat > 0) { |
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| 173 | G4cout << "### G4ElectronIonPair: mean energy per ion pair avalable:" << G4endl; |
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[1340] | 174 | for(G4int i=0; i<nmat; ++i) { |
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[968] | 175 | const G4Material* mat = (*mtable)[i]; |
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| 176 | G4double x = mat->GetIonisation()->GetMeanEnergyPerIonPair(); |
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| 177 | if(x > 0.0) { |
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| 178 | G4cout << " " << mat->GetName() << " Epair= " |
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| 179 | << x/eV << " eV" << G4endl; |
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| 180 | } |
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| 181 | } |
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| 182 | } |
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| 183 | } |
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| 184 | |
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| 185 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 186 | |
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| 187 | void G4ElectronIonPair::DumpG4MeanEnergyPerIonPair() |
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| 188 | { |
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| 189 | if(nMaterials > 0) { |
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| 190 | G4cout << "### G4ElectronIonPair: mean energy per ion pair " |
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| 191 | << " for Geant4 materials" << G4endl; |
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[1340] | 192 | for(G4int i=0; i<nMaterials; ++i) { |
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[968] | 193 | G4cout << " " << g4MatNames[i] << " Epair= " |
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| 194 | << g4MatData[i]/eV << " eV" << G4endl; |
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| 195 | } |
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| 196 | } |
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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 | void G4ElectronIonPair::Initialise() |
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| 202 | { |
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| 203 | // ICRU Report 31, 1979 |
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| 204 | g4MatNames.push_back("G4_Si"); |
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| 205 | g4MatData.push_back(3.62*eV); |
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| 206 | |
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| 207 | g4MatNames.push_back("G4_Ge"); |
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| 208 | g4MatData.push_back(2.97*eV); |
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| 209 | |
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| 210 | g4MatNames.push_back("G4_He"); |
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| 211 | g4MatData.push_back(44.4*eV); |
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| 212 | |
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| 213 | g4MatNames.push_back("G4_N"); |
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| 214 | g4MatData.push_back(36.4*eV); |
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| 215 | |
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| 216 | g4MatNames.push_back("G4_O"); |
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| 217 | g4MatData.push_back(32.3*eV); |
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| 218 | |
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| 219 | g4MatNames.push_back("G4_Ne"); |
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| 220 | g4MatData.push_back(36.8*eV); |
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| 221 | |
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| 222 | g4MatNames.push_back("G4_Ar"); |
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| 223 | g4MatData.push_back(26.34*eV); |
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| 224 | |
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| 225 | g4MatNames.push_back("G4_Kr"); |
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| 226 | g4MatData.push_back(24.1*eV); |
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| 227 | |
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| 228 | g4MatNames.push_back("G4_Xe"); |
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| 229 | g4MatData.push_back(21.6*eV); |
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| 230 | |
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| 231 | g4MatNames.push_back("G4_lAr"); |
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| 232 | g4MatData.push_back(23.6*eV); |
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| 233 | |
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| 234 | g4MatNames.push_back("G4_lKr"); |
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| 235 | g4MatData.push_back(20.5*eV); |
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| 236 | |
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| 237 | g4MatNames.push_back("G4_lXe"); |
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| 238 | g4MatData.push_back(15.6*eV); |
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| 239 | |
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| 240 | g4MatNames.push_back("G4_AIR"); |
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| 241 | g4MatData.push_back(35.1*eV); |
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| 242 | |
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| 243 | nMaterials = g4MatData.size(); |
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| 244 | } |
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| 245 | |
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| 246 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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