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 | #include "G4NeutronIsoIsoCrossSections.hh" |
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27 | #include "G4NeutronHPDataUsed.hh" |
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28 | #include "G4NeutronInelasticCrossSection.hh" |
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29 | |
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30 | G4NeutronIsoIsoCrossSections:: |
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31 | G4NeutronIsoIsoCrossSections() |
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32 | : theCrossSection(), theNames() |
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33 | { |
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34 | theProductionData = NULL; |
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35 | hasData = false; |
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36 | theNumberOfProducts = 0; |
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37 | theZ = 0; |
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38 | theA = 0; |
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39 | } |
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40 | |
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41 | G4NeutronIsoIsoCrossSections:: |
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42 | ~G4NeutronIsoIsoCrossSections() |
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43 | { |
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44 | for(G4int i=0; i<theNumberOfProducts; i++) |
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45 | { |
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46 | delete theProductionData[i]; |
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47 | } |
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48 | delete theProductionData; |
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49 | } |
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50 | |
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51 | void G4NeutronIsoIsoCrossSections:: |
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52 | Init(G4int A, G4int Z, G4double frac) |
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53 | { |
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54 | frac = frac/100.; |
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55 | // First transmution scattering cross-section |
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56 | // in our definition inelastic and fission. |
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57 | |
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58 | theZ = Z; |
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59 | theA = A; |
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60 | theNames.SetMaxOffSet(5); |
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61 | G4NeutronHPDataUsed dataUsed; |
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62 | G4String rest = "/CrossSection/"; |
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63 | G4String base = getenv("G4NEUTRONHPDATA"); |
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64 | G4String base1 = base + "/Inelastic/"; |
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65 | G4bool hasInelasticData = false; |
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66 | dataUsed = theNames.GetName(A, Z, base1, rest, hasInelasticData); |
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67 | G4String aName = dataUsed.GetName(); |
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68 | G4NeutronHPVector inelasticData; |
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69 | G4double dummy; |
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70 | G4int total; |
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71 | if(hasInelasticData) |
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72 | { |
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73 | std::ifstream aDataSet(aName, std::ios::in); |
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74 | aDataSet >> dummy >> dummy >> total; |
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75 | inelasticData.Init(aDataSet, total, eV); |
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76 | } |
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77 | base1 = base + "/Capture/"; |
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78 | G4bool hasCaptureData = false; |
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79 | dataUsed = theNames.GetName(A, Z, base1, rest, hasCaptureData); |
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80 | aName = dataUsed.GetName(); |
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81 | G4NeutronHPVector captureData; |
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82 | if(hasCaptureData) |
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83 | { |
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84 | std::ifstream aDataSet(aName, std::ios::in); |
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85 | aDataSet >> dummy >> dummy >> total; |
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86 | captureData.Init(aDataSet, total, eV); |
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87 | } |
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88 | base1 = base + "/Elastic/"; |
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89 | G4bool hasElasticData = false; |
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90 | dataUsed = theNames.GetName(A, Z, base1, rest, hasElasticData); |
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91 | aName = dataUsed.GetName(); |
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92 | G4NeutronHPVector elasticData; |
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93 | if(hasElasticData) |
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94 | { |
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95 | std::ifstream aDataSet(aName, std::ios::in); |
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96 | aDataSet >> dummy >> dummy >> total; |
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97 | elasticData.Init(aDataSet, total, eV); |
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98 | } |
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99 | base1 = base + "/Fission/"; |
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100 | G4bool hasFissionData = false; |
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101 | if(Z>=91) |
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102 | { |
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103 | dataUsed = theNames.GetName(A, Z, base1, rest, hasFissionData); |
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104 | aName = dataUsed.GetName(); |
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105 | } |
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106 | G4NeutronHPVector fissionData; |
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107 | if(hasFissionData) |
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108 | { |
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109 | std::ifstream aDataSet(aName, std::ios::in); |
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110 | aDataSet >> dummy >> dummy >> total; |
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111 | fissionData.Init(aDataSet, total, eV); |
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112 | } |
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113 | hasData = hasFissionData||hasInelasticData||hasElasticData||hasCaptureData; |
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114 | G4NeutronHPVector merged, merged1; |
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115 | if(hasData) |
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116 | { |
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117 | if(hasFissionData&&hasInelasticData) |
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118 | { |
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119 | merged = fissionData + inelasticData; |
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120 | } |
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121 | else if(hasFissionData) |
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122 | { |
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123 | merged = fissionData; |
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124 | } |
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125 | else if(hasInelasticData) |
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126 | { |
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127 | merged = inelasticData; |
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128 | } |
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129 | |
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130 | if(hasElasticData&&hasCaptureData) |
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131 | { |
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132 | merged1=elasticData + captureData; |
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133 | } |
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134 | else if(hasCaptureData) |
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135 | { |
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136 | merged1 = captureData; |
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137 | } |
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138 | else if(hasElasticData) |
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139 | { |
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140 | merged1 = elasticData; |
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141 | } |
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142 | |
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143 | if((hasElasticData||hasCaptureData)&&(hasFissionData||hasInelasticData)) |
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144 | { |
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145 | theCrossSection = merged + merged1; |
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146 | } |
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147 | else if(hasElasticData||hasCaptureData) |
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148 | { |
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149 | theCrossSection = merged1; |
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150 | } |
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151 | else if(hasFissionData||hasInelasticData) |
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152 | { |
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153 | theCrossSection = merged; |
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154 | } |
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155 | theCrossSection.Times(frac); |
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156 | } |
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157 | // theCrossSection.Dump(); |
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158 | |
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159 | // now isotope-production cross-sections |
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160 | theNames.SetMaxOffSet(1); |
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161 | rest = "/CrossSection/"; |
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162 | base1 = base + "/IsotopeProduction/"; |
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163 | G4bool hasIsotopeProductionData; |
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164 | dataUsed = theNames.GetName(A, Z, base1, rest, hasIsotopeProductionData); |
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165 | aName = dataUsed.GetName(); |
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166 | if(hasIsotopeProductionData) |
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167 | { |
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168 | std::ifstream aDataSet(aName, std::ios::in); |
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169 | aDataSet>>theNumberOfProducts; |
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170 | theProductionData = new G4IsoProdCrossSections * [theNumberOfProducts]; |
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171 | for(G4int i=0; i<theNumberOfProducts; i++) |
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172 | { |
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173 | G4String aName; |
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174 | aDataSet >> aName; |
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175 | aDataSet >> dummy >> dummy; |
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176 | theProductionData[i] = new G4IsoProdCrossSections(aName); |
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177 | theProductionData[i]->Init(aDataSet); |
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178 | } |
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179 | } |
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180 | else |
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181 | { |
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182 | hasData = false; |
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183 | } |
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184 | G4NeutronInelasticCrossSection theParametrization; |
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185 | G4double lastEnergy = theCrossSection.GetX(theCrossSection.GetVectorLength()-1); |
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186 | G4double lastValue = theCrossSection.GetY(theCrossSection.GetVectorLength()-1); |
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187 | G4double norm = theParametrization.GetCrossSection(lastEnergy, A, Z); |
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188 | G4double increment = 1*MeV; |
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189 | while(lastEnergy+increment<101*MeV) |
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190 | { |
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191 | G4double currentEnergy = lastEnergy+increment; |
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192 | G4double value = theParametrization.GetCrossSection(currentEnergy, A, Z)*(lastValue/norm); |
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193 | G4int position = theCrossSection.GetVectorLength(); |
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194 | theCrossSection.SetData(position, currentEnergy, value); |
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195 | increment+=1*MeV; |
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196 | } |
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197 | } |
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198 | |
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199 | G4double G4NeutronIsoIsoCrossSections:: |
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200 | GetCrossSection(G4double anEnergy) |
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201 | { |
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202 | G4double result; |
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203 | result = theCrossSection.GetY(anEnergy); |
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204 | return result; |
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205 | } |
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206 | |
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207 | G4String G4NeutronIsoIsoCrossSections:: |
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208 | GetProductIsotope(G4double anEnergy) |
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209 | { |
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210 | G4String result = "UNCHANGED"; |
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211 | |
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212 | G4double totalXSec = theCrossSection.GetY(anEnergy); |
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213 | if(totalXSec==0) return result; |
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214 | |
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215 | // now do the isotope changing reactions |
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216 | G4double * xSec = new G4double[theNumberOfProducts]; |
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217 | G4double sum = 0; |
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218 | { |
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219 | for(G4int i=0; i<theNumberOfProducts; i++) |
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220 | { |
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221 | xSec[i] = theProductionData[i]->GetProductionCrossSection(anEnergy); |
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222 | sum += xSec[i]; |
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223 | } |
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224 | } |
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225 | G4double isoChangeXsec = sum; |
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226 | G4double rand = G4UniformRand(); |
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227 | if(rand > isoChangeXsec/totalXSec) |
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228 | { |
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229 | delete [] xSec; |
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230 | return result; |
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231 | } |
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232 | G4double random = G4UniformRand(); |
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233 | G4double running = 0; |
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234 | G4int index(0); |
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235 | { |
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236 | for(G4int i=0; i<theNumberOfProducts; i++) |
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237 | { |
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238 | running += xSec[i]; |
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239 | index = i; |
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240 | if(random<=running/sum) break; |
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241 | } |
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242 | } |
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243 | delete [] xSec; |
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244 | result = theProductionData[index]->GetProductIsotope(); |
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245 | |
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246 | return result; |
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247 | } |
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