1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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18 | // * This code implementation is the result of the scientific and * |
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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: G4VEmModel.cc,v 1.37 2010/10/14 16:27:35 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: emutils-V09-03-23 $ |
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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: G4VEmModel |
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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: 25.07.2005 |
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39 | // |
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40 | // Modifications: |
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41 | // 25.10.2005 Set default highLimit=100.TeV (V.Ivanchenko) |
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42 | // 06.02.2006 add method ComputeMeanFreePath() (mma) |
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43 | // 16.02.2009 Move implementations of virtual methods to source (VI) |
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44 | // |
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45 | // |
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46 | // Class Description: |
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47 | // |
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48 | // Abstract interface to energy loss models |
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49 | |
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50 | // ------------------------------------------------------------------- |
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51 | // |
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52 | |
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53 | #include "G4VEmModel.hh" |
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54 | #include "G4LossTableManager.hh" |
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55 | #include "G4ProductionCutsTable.hh" |
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56 | #include "G4ParticleChangeForLoss.hh" |
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57 | #include "G4ParticleChangeForGamma.hh" |
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58 | |
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59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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60 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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61 | |
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62 | G4VEmModel::G4VEmModel(const G4String& nam): |
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63 | flucModel(0),anglModel(0), name(nam), lowLimit(0.1*keV), highLimit(100.0*TeV), |
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64 | eMinActive(0.0),eMaxActive(DBL_MAX), |
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65 | polarAngleLimit(0.0),secondaryThreshold(DBL_MAX),theLPMflag(false), |
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66 | pParticleChange(0),/*nuclearStopping(false),*/ |
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67 | currentCouple(0),currentElement(0), |
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68 | nsec(5),flagDeexcitation(false) |
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69 | { |
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70 | xsec.resize(nsec); |
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71 | nSelectors = 0; |
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72 | G4LossTableManager::Instance()->Register(this); |
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73 | } |
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74 | |
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75 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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76 | |
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77 | G4VEmModel::~G4VEmModel() |
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78 | { |
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79 | G4LossTableManager::Instance()->DeRegister(this); |
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80 | G4int n = elmSelectors.size(); |
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81 | if(n > 0) { |
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82 | for(G4int i=0; i<n; ++i) { |
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83 | delete elmSelectors[i]; |
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84 | } |
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85 | } |
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86 | delete anglModel; |
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87 | } |
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88 | |
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89 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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90 | |
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91 | G4ParticleChangeForLoss* G4VEmModel::GetParticleChangeForLoss() |
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92 | { |
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93 | G4ParticleChangeForLoss* p = 0; |
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94 | if (pParticleChange) { |
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95 | p = static_cast<G4ParticleChangeForLoss*>(pParticleChange); |
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96 | } else { |
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97 | p = new G4ParticleChangeForLoss(); |
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98 | pParticleChange = p; |
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99 | } |
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100 | return p; |
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101 | } |
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102 | |
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103 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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104 | |
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105 | G4ParticleChangeForGamma* G4VEmModel::GetParticleChangeForGamma() |
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106 | { |
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107 | G4ParticleChangeForGamma* p = 0; |
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108 | if (pParticleChange) { |
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109 | p = static_cast<G4ParticleChangeForGamma*>(pParticleChange); |
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110 | } else { |
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111 | p = new G4ParticleChangeForGamma(); |
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112 | pParticleChange = p; |
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113 | } |
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114 | return p; |
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115 | } |
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116 | |
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117 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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118 | |
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119 | void G4VEmModel::InitialiseElementSelectors(const G4ParticleDefinition* p, |
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120 | const G4DataVector& cuts) |
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121 | { |
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122 | // initialise before run |
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123 | flagDeexcitation = false; |
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124 | G4LossTableManager* man = G4LossTableManager::Instance(); |
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125 | G4bool spline = man->SplineFlag(); |
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126 | |
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127 | // two times less bins because probability functon is normalized |
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128 | // so correspondingly is more smooth |
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129 | G4int nbins = (man->GetNumberOfBinsPerDecade()/3)* |
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130 | G4int(std::log10(highLimit/lowLimit) + 0.5); |
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131 | if(nbins < 5) { nbins = 5; } |
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132 | |
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133 | G4ProductionCutsTable* theCoupleTable= |
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134 | G4ProductionCutsTable::GetProductionCutsTable(); |
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135 | G4int numOfCouples = theCoupleTable->GetTableSize(); |
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136 | |
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137 | // prepare vector |
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138 | if(numOfCouples > nSelectors) { |
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139 | elmSelectors.reserve(numOfCouples); |
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140 | for(G4int i=nSelectors; i<numOfCouples; ++i) { elmSelectors.push_back(0); } |
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141 | nSelectors = numOfCouples; |
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142 | } |
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143 | |
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144 | // initialise vector |
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145 | for(G4int i=0; i<numOfCouples; ++i) { |
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146 | currentCouple = theCoupleTable->GetMaterialCutsCouple(i); |
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147 | const G4Material* material = currentCouple->GetMaterial(); |
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148 | G4int idx = currentCouple->GetIndex(); |
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149 | |
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150 | // selector already exist check if should be deleted |
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151 | G4bool create = true; |
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152 | if(elmSelectors[i]) { |
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153 | if(material == elmSelectors[i]->GetMaterial()) { create = false; } |
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154 | else { delete elmSelectors[i]; } |
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155 | } |
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156 | if(create) { |
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157 | elmSelectors[i] = new G4EmElementSelector(this,material,nbins, |
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158 | lowLimit,highLimit,spline); |
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159 | } |
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160 | elmSelectors[i]->Initialise(p, cuts[idx]); |
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161 | //elmSelectors[i]->Dump(p); |
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162 | } |
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163 | } |
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164 | |
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165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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166 | |
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167 | G4double G4VEmModel::ComputeDEDXPerVolume(const G4Material*, |
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168 | const G4ParticleDefinition*, |
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169 | G4double,G4double) |
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170 | { |
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171 | return 0.0; |
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172 | } |
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173 | |
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174 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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175 | |
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176 | G4double G4VEmModel::CrossSectionPerVolume(const G4Material* material, |
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177 | const G4ParticleDefinition* p, |
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178 | G4double ekin, |
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179 | G4double emin, |
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180 | G4double emax) |
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181 | { |
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182 | SetupForMaterial(p, material, ekin); |
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183 | G4double cross = 0.0; |
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184 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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185 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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186 | G4int nelm = material->GetNumberOfElements(); |
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187 | if(nelm > nsec) { |
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188 | xsec.resize(nelm); |
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189 | nsec = nelm; |
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190 | } |
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191 | for (G4int i=0; i<nelm; i++) { |
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192 | cross += theAtomNumDensityVector[i]* |
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193 | ComputeCrossSectionPerAtom(p,(*theElementVector)[i],ekin,emin,emax); |
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194 | xsec[i] = cross; |
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195 | } |
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196 | return cross; |
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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 | const G4Element* G4VEmModel::SelectRandomAtom(const G4Material* material, |
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202 | const G4ParticleDefinition* pd, |
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203 | G4double kinEnergy, |
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204 | G4double tcut, |
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205 | G4double tmax) |
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206 | { |
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207 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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208 | G4int n = material->GetNumberOfElements() - 1; |
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209 | currentElement = (*theElementVector)[n]; |
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210 | if (n > 0) { |
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211 | G4double x = G4UniformRand()* |
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212 | G4VEmModel::CrossSectionPerVolume(material,pd,kinEnergy,tcut,tmax); |
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213 | for(G4int i=0; i<n; ++i) { |
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214 | if (x <= xsec[i]) { |
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215 | currentElement = (*theElementVector)[i]; |
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216 | break; |
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217 | } |
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218 | } |
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219 | } |
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220 | return currentElement; |
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221 | } |
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222 | |
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223 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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224 | |
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225 | G4double G4VEmModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*, |
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226 | G4double, G4double, G4double, |
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227 | G4double, G4double) |
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228 | { |
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229 | return 0.0; |
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230 | } |
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231 | |
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232 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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233 | |
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234 | void G4VEmModel::DefineForRegion(const G4Region*) |
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235 | {} |
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236 | |
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237 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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238 | |
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239 | G4double G4VEmModel::MinEnergyCut(const G4ParticleDefinition*, |
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240 | const G4MaterialCutsCouple*) |
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241 | { |
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242 | return 0.0; |
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243 | } |
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244 | |
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245 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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246 | |
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247 | G4double G4VEmModel::ChargeSquareRatio(const G4Track& track) |
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248 | { |
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249 | return GetChargeSquareRatio(track.GetParticleDefinition(), |
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250 | track.GetMaterial(), track.GetKineticEnergy()); |
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251 | } |
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252 | |
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253 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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254 | |
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255 | G4double G4VEmModel::GetChargeSquareRatio(const G4ParticleDefinition* p, |
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256 | const G4Material*, G4double) |
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257 | { |
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258 | G4double q = p->GetPDGCharge()/CLHEP::eplus; |
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259 | return q*q; |
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260 | } |
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261 | |
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262 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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263 | |
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264 | G4double G4VEmModel::GetParticleCharge(const G4ParticleDefinition* p, |
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265 | const G4Material*, G4double) |
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266 | { |
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267 | return p->GetPDGCharge(); |
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268 | } |
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269 | |
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270 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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271 | |
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272 | void G4VEmModel::CorrectionsAlongStep(const G4MaterialCutsCouple*, |
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273 | const G4DynamicParticle*, |
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274 | G4double&,G4double&,G4double) |
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275 | {} |
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276 | |
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277 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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278 | |
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279 | void G4VEmModel::SampleDeexcitationAlongStep(const G4Material*, |
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280 | const G4Track&, |
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281 | G4double& ) |
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282 | {} |
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283 | |
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284 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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285 | |
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286 | G4double G4VEmModel::MaxSecondaryEnergy(const G4ParticleDefinition*, |
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287 | G4double kineticEnergy) |
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288 | { |
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289 | return kineticEnergy; |
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290 | } |
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291 | |
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292 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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293 | |
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294 | void G4VEmModel::SetupForMaterial(const G4ParticleDefinition*, |
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295 | const G4Material*, G4double) |
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296 | {} |
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297 | |
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298 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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299 | |
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300 | void |
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301 | G4VEmModel::SetParticleChange(G4VParticleChange* p, G4VEmFluctuationModel* f) |
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302 | { |
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303 | if(p && pParticleChange != p) { pParticleChange = p; } |
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304 | flucModel = f; |
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305 | } |
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306 | |
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307 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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