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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26 | // $Id: G4ElectronIonPair.cc,v 1.2 2008/10/17 14:46:16 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-02 $ |
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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 "G4Gamma.hh" |
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49 | #include "G4Material.hh" |
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50 | #include "G4MaterialTable.hh" |
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51 | #include "G4StepPoint.hh" |
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52 | #include "G4VProcess.hh" |
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53 | #include "G4ProcessType.hh" |
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54 | #include "G4Track.hh" |
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55 | #include "Randomize.hh" |
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56 | |
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57 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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58 | |
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59 | G4ElectronIonPair::G4ElectronIonPair() |
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60 | { |
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61 | verbose = 1; |
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62 | curMaterial = 0; |
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63 | curMeanEnergy = 0.0; |
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64 | nMaterials = 0; |
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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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99 | if(curMeanEnergy > 0.0) nion = (edep - niel)/curMeanEnergy; |
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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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108 | G4ElectronIonPair::SampleIonsAlongStep(const G4ThreeVector& prePos, |
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109 | const G4ThreeVector& postPos, |
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110 | G4double meanion) |
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111 | { |
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112 | std::vector<G4ThreeVector>* v = new std::vector<G4ThreeVector>; |
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113 | |
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114 | G4double sig = 0.2*std::sqrt(meanion); |
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115 | G4int nion = G4int(G4RandGauss::shoot(meanion,sig) + 0.5); |
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116 | |
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117 | // sample ionisation along step |
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118 | if(nion > 0) { |
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119 | |
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120 | G4ThreeVector deltaPos = postPos - prePos; |
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121 | for(G4int i=0; i<nion; i++) { |
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122 | v->push_back( prePos + deltaPos*G4UniformRand() ); |
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123 | } |
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124 | if(verbose > 1 ) { |
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125 | G4cout << "### G4ElectronIonPair::SampleIonisationPoints: " |
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126 | << v->size() << " ion pairs are added" << G4endl; |
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127 | } |
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128 | } |
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129 | return v; |
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130 | } |
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131 | |
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132 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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133 | |
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134 | G4int G4ElectronIonPair::ResidualeChargePostStep(const G4ParticleDefinition*, |
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135 | const G4TrackVector*, |
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136 | G4int subType) |
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137 | { |
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138 | G4int nholes = 0; |
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139 | |
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140 | if(2 == subType || 12 == subType || 13 == subType) nholes = 1; |
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141 | return nholes; |
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142 | } |
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143 | |
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144 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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145 | |
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146 | G4double G4ElectronIonPair::FindG4MeanEnergyPerIonPair(const G4Material* mat) |
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147 | { |
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148 | G4String name = mat->GetName(); |
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149 | G4double res = 0.0; |
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150 | |
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151 | // is this material in the vector? |
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152 | for(G4int j=0; j<nMaterials; j++) { |
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153 | if(name == g4MatNames[j]) { |
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154 | res = g4MatData[j]; |
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155 | mat->GetIonisation()->SetMeanEnergyPerIonPair(res); |
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156 | if(verbose > 0) { |
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157 | G4cout << "### G4ElectronIonPair::FindG4MeanEnergyPerIonPair for " |
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158 | << name << " Epair= " << res/eV << " eV is set" |
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159 | << G4endl; |
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160 | } |
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161 | break; |
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162 | } |
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163 | } |
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164 | return res; |
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165 | } |
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166 | |
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167 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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168 | |
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169 | void G4ElectronIonPair:: DumpMeanEnergyPerIonPair() |
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170 | { |
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171 | G4int nmat = G4Material::GetNumberOfMaterials(); |
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172 | const G4MaterialTable* mtable = G4Material::GetMaterialTable(); |
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173 | if(nmat > 0) { |
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174 | G4cout << "### G4ElectronIonPair: mean energy per ion pair avalable:" << G4endl; |
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175 | for(G4int i=0; i<nmat; i++) { |
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176 | const G4Material* mat = (*mtable)[i]; |
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177 | G4double x = mat->GetIonisation()->GetMeanEnergyPerIonPair(); |
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178 | if(x > 0.0) { |
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179 | G4cout << " " << mat->GetName() << " Epair= " |
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180 | << x/eV << " eV" << G4endl; |
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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 | |
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186 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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187 | |
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188 | void G4ElectronIonPair::DumpG4MeanEnergyPerIonPair() |
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189 | { |
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190 | if(nMaterials > 0) { |
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191 | G4cout << "### G4ElectronIonPair: mean energy per ion pair " |
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192 | << " for Geant4 materials" << G4endl; |
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193 | for(G4int i=0; i<nMaterials; i++) { |
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194 | G4cout << " " << g4MatNames[i] << " Epair= " |
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195 | << g4MatData[i]/eV << " eV" << G4endl; |
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196 | } |
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197 | } |
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198 | } |
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199 | |
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200 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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201 | |
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202 | void G4ElectronIonPair::Initialise() |
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203 | { |
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204 | // ICRU Report 31, 1979 |
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205 | g4MatNames.push_back("G4_Si"); |
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206 | g4MatData.push_back(3.62*eV); |
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207 | |
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208 | g4MatNames.push_back("G4_Ge"); |
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209 | g4MatData.push_back(2.97*eV); |
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210 | |
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211 | g4MatNames.push_back("G4_He"); |
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212 | g4MatData.push_back(44.4*eV); |
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213 | |
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214 | g4MatNames.push_back("G4_N"); |
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215 | g4MatData.push_back(36.4*eV); |
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216 | |
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217 | g4MatNames.push_back("G4_O"); |
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218 | g4MatData.push_back(32.3*eV); |
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219 | |
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220 | g4MatNames.push_back("G4_Ne"); |
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221 | g4MatData.push_back(36.8*eV); |
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222 | |
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223 | g4MatNames.push_back("G4_Ar"); |
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224 | g4MatData.push_back(26.34*eV); |
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225 | |
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226 | g4MatNames.push_back("G4_Kr"); |
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227 | g4MatData.push_back(24.1*eV); |
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228 | |
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229 | g4MatNames.push_back("G4_Xe"); |
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230 | g4MatData.push_back(21.6*eV); |
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231 | |
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232 | g4MatNames.push_back("G4_lAr"); |
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233 | g4MatData.push_back(23.6*eV); |
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234 | |
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235 | g4MatNames.push_back("G4_lKr"); |
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236 | g4MatData.push_back(20.5*eV); |
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237 | |
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238 | g4MatNames.push_back("G4_lXe"); |
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239 | g4MatData.push_back(15.6*eV); |
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240 | |
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241 | g4MatNames.push_back("G4_AIR"); |
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242 | g4MatData.push_back(35.1*eV); |
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243 | |
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244 | nMaterials = g4MatData.size(); |
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245 | } |
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246 | |
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247 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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