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 | // |
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27 | |
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28 | #include "G4CrossSectionDataStore.hh" |
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29 | #include "G4HadronicException.hh" |
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30 | #include "G4StableIsotopes.hh" |
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31 | #include "G4HadTmpUtil.hh" |
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32 | #include "Randomize.hh" |
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33 | |
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34 | |
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35 | G4double |
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36 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle, |
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37 | const G4Element* anElement, |
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38 | G4double aTemperature) |
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39 | { |
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40 | if (NDataSetList == 0) |
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41 | { |
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42 | throw G4HadronicException(__FILE__, __LINE__, |
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43 | "G4CrossSectionDataStore: no data sets registered"); |
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44 | return DBL_MIN; |
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45 | } |
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46 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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47 | if (DataSetList[i]->IsApplicable(aParticle, anElement)) |
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48 | return DataSetList[i]->GetCrossSection(aParticle,anElement,aTemperature); |
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49 | } |
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50 | throw G4HadronicException(__FILE__, __LINE__, |
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51 | "G4CrossSectionDataStore: no applicable data set found " |
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52 | "for particle/element"); |
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53 | return DBL_MIN; |
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54 | } |
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55 | |
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56 | G4VCrossSectionDataSet* |
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57 | G4CrossSectionDataStore::whichDataSetInCharge(const G4DynamicParticle* aParticle, |
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58 | const G4Element* anElement) |
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59 | { |
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60 | if (NDataSetList == 0) |
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61 | { |
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62 | throw G4HadronicException(__FILE__, __LINE__, |
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63 | "G4CrossSectionDataStore: no data sets registered"); |
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64 | return 0; |
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65 | } |
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66 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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67 | if (DataSetList[i]->IsApplicable(aParticle, anElement) ) |
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68 | { |
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69 | return DataSetList[i]; |
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70 | } |
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71 | } |
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72 | throw G4HadronicException(__FILE__, __LINE__, |
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73 | "G4CrossSectionDataStore: no applicable data set found " |
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74 | "for particle/element"); |
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75 | return 0; |
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76 | } |
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77 | |
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78 | |
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79 | G4double |
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80 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle, |
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81 | const G4Isotope* anIsotope, |
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82 | G4double aTemperature) |
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83 | { |
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84 | if (NDataSetList == 0) |
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85 | { |
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86 | throw G4HadronicException(__FILE__, __LINE__, |
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87 | "G4CrossSectionDataStore: no data sets registered"); |
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88 | return DBL_MIN; |
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89 | } |
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90 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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91 | if (DataSetList[i]->IsZAApplicable(aParticle, anIsotope->GetZ(), anIsotope->GetN())) |
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92 | return DataSetList[i]->GetIsoCrossSection(aParticle,anIsotope,aTemperature); |
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93 | } |
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94 | throw G4HadronicException(__FILE__, __LINE__, |
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95 | "G4CrossSectionDataStore: no applicable data set found " |
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96 | "for particle/element"); |
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97 | return DBL_MIN; |
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98 | } |
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99 | |
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100 | |
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101 | G4double |
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102 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle, |
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103 | G4double Z, G4double A, |
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104 | G4double aTemperature) |
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105 | { |
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106 | if (NDataSetList == 0) |
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107 | { |
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108 | throw G4HadronicException(__FILE__, __LINE__, |
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109 | "G4CrossSectionDataStore: no data sets registered"); |
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110 | return DBL_MIN; |
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111 | } |
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112 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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113 | if (DataSetList[i]->IsZAApplicable(aParticle, Z, A)) |
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114 | return DataSetList[i]->GetIsoZACrossSection(aParticle,Z,A,aTemperature); |
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115 | } |
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116 | throw G4HadronicException(__FILE__, __LINE__, |
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117 | "G4CrossSectionDataStore: no applicable data set found " |
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118 | "for particle/element"); |
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119 | return DBL_MIN; |
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120 | } |
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121 | |
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122 | |
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123 | G4double |
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124 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle, |
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125 | const G4Material* aMaterial) |
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126 | { |
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127 | G4double sigma(0); |
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128 | G4double aTemp = aMaterial->GetTemperature(); |
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129 | G4int nElements = aMaterial->GetNumberOfElements(); |
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130 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume(); |
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131 | G4double xSection(0); |
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132 | |
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133 | for(G4int i=0; i<nElements; i++) { |
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134 | xSection = GetCrossSection( aParticle, (*aMaterial->GetElementVector())[i], aTemp); |
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135 | sigma += theAtomsPerVolumeVector[i] * xSection; |
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136 | } |
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137 | |
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138 | return sigma; |
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139 | } |
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140 | |
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141 | |
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142 | std::pair<G4double, G4double> |
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143 | G4CrossSectionDataStore::SelectRandomIsotope(const G4DynamicParticle* particle, |
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144 | const G4Material* aMaterial) |
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145 | { |
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146 | static G4StableIsotopes theDefaultIsotopes; // natural abundances and |
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147 | // stable isotopes |
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148 | G4double aTemp = aMaterial->GetTemperature(); |
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149 | G4int nElements = aMaterial->GetNumberOfElements(); |
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150 | const G4ElementVector* theElementVector = aMaterial->GetElementVector(); |
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151 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume(); |
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152 | std::vector<std::vector<G4double> > awicsPerElement; |
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153 | std::vector<std::vector<G4double> > AvaluesPerElement; |
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154 | G4Element* anElement; |
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155 | |
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156 | // Collect abundance weighted cross sections and A values for each isotope |
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157 | // in each element |
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158 | |
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159 | for (G4int i = 0; i < nElements; i++) { |
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160 | anElement = (*theElementVector)[i]; |
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161 | G4int nIsoPerElement = anElement->GetNumberOfIsotopes(); |
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162 | std::vector<G4double> isoholder; |
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163 | std::vector<G4double> aholder; |
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164 | G4double iso_xs = DBL_MIN; |
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165 | |
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166 | if (nIsoPerElement) { // user-defined isotope abundances |
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167 | G4IsotopeVector* isoVector = anElement->GetIsotopeVector(); |
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168 | G4double* abundVector = anElement->GetRelativeAbundanceVector(); |
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169 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement); |
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170 | G4bool elementXS = false; |
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171 | for (G4int j = 0; j < nIsoPerElement; j++) { |
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172 | if (inCharge->IsZAApplicable(particle, (*isoVector)[j]->GetZ(), |
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173 | (*isoVector)[j]->GetN() ) ) { |
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174 | iso_xs = inCharge->GetIsoCrossSection(particle, (*isoVector)[j], aTemp); |
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175 | } else if (elementXS == false) { |
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176 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp); |
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177 | elementXS = true; |
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178 | } |
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179 | |
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180 | isoholder.push_back(abundVector[j]*iso_xs); |
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181 | aholder.push_back(G4double((*isoVector)[j]->GetN())); |
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182 | } |
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183 | |
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184 | } else { // natural abundances |
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185 | G4int ZZ = G4lrint(anElement->GetZ()); |
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186 | nIsoPerElement = theDefaultIsotopes.GetNumberOfIsotopes(ZZ); |
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187 | G4int index = theDefaultIsotopes.GetFirstIsotope(ZZ); |
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188 | G4double AA; |
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189 | G4double abundance; |
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190 | |
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191 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement); |
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192 | G4bool elementXS = false; |
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193 | |
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194 | for (G4int j = 0; j < nIsoPerElement; j++) { |
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195 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+j)); |
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196 | aholder.push_back(AA); |
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197 | if (inCharge->IsZAApplicable(particle, G4double(ZZ), AA) ) { |
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198 | iso_xs = inCharge->GetIsoZACrossSection(particle, G4double(ZZ), AA, aTemp); |
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199 | } else if (elementXS == false) { |
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200 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp); |
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201 | elementXS = true; |
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202 | } |
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203 | abundance = theDefaultIsotopes.GetAbundance(index+j)/100.0; |
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204 | isoholder.push_back(abundance*iso_xs); |
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205 | } |
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206 | } |
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207 | |
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208 | awicsPerElement.push_back(isoholder); |
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209 | AvaluesPerElement.push_back(aholder); |
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210 | } |
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211 | |
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212 | // Calculate running sums for isotope selection |
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213 | |
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214 | G4double crossSectionTotal = 0; |
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215 | G4double xSectionPerElement; |
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216 | std::vector<G4double> runningSum; |
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217 | |
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218 | for (G4int i=0; i < nElements; i++) { |
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219 | xSectionPerElement = 0; |
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220 | for (G4int j=0; j < G4int(awicsPerElement[i].size()); j++) |
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221 | xSectionPerElement += awicsPerElement[i][j]; |
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222 | runningSum.push_back(theAtomsPerVolumeVector[i]*xSectionPerElement); |
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223 | crossSectionTotal += runningSum[i]; |
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224 | } |
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225 | |
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226 | // Compare random number to running sum over element xc to choose Z |
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227 | |
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228 | // Initialize Z and A to first element and first isotope in case |
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229 | // cross section is zero |
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230 | |
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231 | G4double ZZ = (*theElementVector)[0]->GetZ(); |
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232 | G4double AA = AvaluesPerElement[0][0]; |
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233 | if (crossSectionTotal != 0.) { |
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234 | G4double random = G4UniformRand(); |
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235 | for(G4int i=0; i < nElements; i++) { |
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236 | if(i!=0) runningSum[i] += runningSum[i-1]; |
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237 | if(random <= runningSum[i]/crossSectionTotal) { |
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238 | ZZ = ((*theElementVector)[i])->GetZ(); |
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239 | |
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240 | // Compare random number to running sum over isotope xc to choose A |
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241 | |
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242 | G4int nIso = awicsPerElement[i].size(); |
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243 | G4double* running = new G4double[nIso]; |
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244 | for (G4int j=0; j < nIso; j++) { |
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245 | running[j] = awicsPerElement[i][j]; |
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246 | if(j!=0) running[j] += running[j-1]; |
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247 | } |
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248 | |
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249 | G4double trial = G4UniformRand(); |
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250 | for (G4int j=0; j < nIso; j++) { |
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251 | AA = AvaluesPerElement[i][j]; |
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252 | if (trial <= running[j]/running[nIso-1]) break; |
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253 | } |
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254 | delete [] running; |
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255 | break; |
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256 | } |
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257 | } |
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258 | } |
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259 | return std::pair<G4double, G4double>(ZZ, AA); |
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260 | } |
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261 | |
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262 | |
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263 | void |
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264 | G4CrossSectionDataStore::AddDataSet(G4VCrossSectionDataSet* aDataSet) |
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265 | { |
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266 | if (NDataSetList == NDataSetMax) { |
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267 | G4cout << "WARNING: G4CrossSectionDataStore::AddDataSet: "<<G4endl; |
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268 | G4cout << " reached maximum number of data sets"; |
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269 | G4cout << " data set not added !!!!!!!!!!!!!!!!"; |
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270 | return; |
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271 | } |
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272 | DataSetList[NDataSetList] = aDataSet; |
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273 | NDataSetList++; |
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274 | } |
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275 | |
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276 | |
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277 | void |
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278 | G4CrossSectionDataStore:: |
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279 | BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
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280 | { |
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281 | if (NDataSetList == 0) |
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282 | { |
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283 | G4Exception("G4CrossSectionDataStore", "007", FatalException, |
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284 | "BuildPhysicsTable: no data sets registered"); |
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285 | return; |
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286 | } |
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287 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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288 | DataSetList[i]->BuildPhysicsTable(aParticleType); |
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289 | } |
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290 | } |
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291 | |
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292 | |
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293 | void |
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294 | G4CrossSectionDataStore:: |
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295 | DumpPhysicsTable(const G4ParticleDefinition& aParticleType) |
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296 | { |
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297 | if (NDataSetList == 0) { |
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298 | G4cout << "WARNING - G4CrossSectionDataStore::DumpPhysicsTable: no data sets registered"<<G4endl; |
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299 | return; |
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300 | } |
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301 | for (G4int i = NDataSetList-1; i >= 0; i--) { |
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302 | DataSetList[i]->DumpPhysicsTable(aParticleType); |
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303 | } |
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304 | } |
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