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2 | // ******************************************************************** |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4eIonisationCrossSectionHandler.cc,v 1.15 2009/09/27 10:47:42 sincerti Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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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: G4eIonisationCrossSectionHandler |
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35 | // |
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36 | // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch) |
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37 | // |
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38 | // Creation date: 25 Sept 2001 |
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39 | // |
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40 | // Modifications: |
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41 | // 10 Oct 2001 M.G. Pia Revision to improve code quality and consistency with design |
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42 | // 19 Jul 2002 VI Create composite data set for material |
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43 | // 21 Jan 2003 V.Ivanchenko Cut per region |
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44 | // 28 Jan 2009 L.Pandola Added public method to make a easier migration of |
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45 | // G4LowEnergyIonisation to G4LivermoreIonisationModel |
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46 | // 15 Jul 2009 Nicolas A. Karakatsanis |
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47 | // |
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48 | // - BuildCrossSectionForMaterials method was revised in order to calculate the |
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49 | // logarithmic values of the loaded data. |
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50 | // It retrieves the data values from the G4EMLOW data files but, then, calculates the |
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51 | // respective log values and loads them to seperate data structures. |
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52 | // The EM data sets, initialized this way, contain both non-log and log values. |
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53 | // These initialized data sets can enhance the computing performance of data interpolation |
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54 | // operations |
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55 | // |
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56 | // |
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57 | // |
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58 | // ------------------------------------------------------------------- |
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59 | |
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60 | #include "G4eIonisationCrossSectionHandler.hh" |
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61 | #include "G4VEnergySpectrum.hh" |
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62 | #include "G4DataVector.hh" |
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63 | #include "G4CompositeEMDataSet.hh" |
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64 | #include "G4VDataSetAlgorithm.hh" |
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65 | #include "G4LinLogLogInterpolation.hh" |
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66 | #include "G4SemiLogInterpolation.hh" |
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67 | #include "G4VEMDataSet.hh" |
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68 | #include "G4EMDataSet.hh" |
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69 | #include "G4Material.hh" |
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70 | #include "G4ProductionCutsTable.hh" |
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71 | |
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72 | |
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73 | G4eIonisationCrossSectionHandler::G4eIonisationCrossSectionHandler( |
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74 | const G4VEnergySpectrum* spec, G4VDataSetAlgorithm* alg, |
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75 | G4double emin, G4double emax, G4int nbin) |
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76 | : G4VCrossSectionHandler(), |
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77 | theParam(spec) |
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78 | { |
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79 | G4VCrossSectionHandler::Initialise(alg, emin, emax, nbin); |
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80 | interp = new G4LinLogLogInterpolation(); |
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81 | } |
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82 | |
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83 | |
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84 | G4eIonisationCrossSectionHandler::~G4eIonisationCrossSectionHandler() |
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85 | { |
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86 | delete interp; |
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87 | } |
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88 | |
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89 | |
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90 | std::vector<G4VEMDataSet*>* G4eIonisationCrossSectionHandler::BuildCrossSectionsForMaterials( |
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91 | const G4DataVector& energyVector, |
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92 | const G4DataVector* energyCuts) |
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93 | { |
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94 | G4int verbose = 0; |
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95 | std::vector<G4VEMDataSet*>* set = new std::vector<G4VEMDataSet*>; |
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96 | |
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97 | G4DataVector* energies; |
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98 | G4DataVector* cs; |
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99 | |
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100 | G4DataVector* log_energies; |
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101 | G4DataVector* log_cs; |
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102 | |
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103 | G4int nOfBins = energyVector.size(); |
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104 | |
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105 | const G4ProductionCutsTable* theCoupleTable= |
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106 | G4ProductionCutsTable::GetProductionCutsTable(); |
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107 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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108 | |
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109 | for (size_t m=0; m<numOfCouples; m++) { |
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110 | |
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111 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m); |
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112 | const G4Material* material= couple->GetMaterial(); |
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113 | const G4ElementVector* elementVector = material->GetElementVector(); |
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114 | const G4double* nAtomsPerVolume = material->GetAtomicNumDensityVector(); |
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115 | G4int nElements = material->GetNumberOfElements(); |
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116 | |
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117 | if(verbose > 0) |
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118 | { |
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119 | G4cout << "eIonisation CS for " << m << "th material " |
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120 | << material->GetName() |
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121 | << " eEl= " << nElements << G4endl; |
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122 | } |
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123 | |
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124 | G4double tcut = (*energyCuts)[m]; |
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125 | |
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126 | G4VDataSetAlgorithm* algo = interp->Clone(); |
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127 | G4VEMDataSet* setForMat = new G4CompositeEMDataSet(algo,1.,1.); |
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128 | |
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129 | for (G4int i=0; i<nElements; i++) { |
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130 | |
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131 | G4int Z = (G4int) (*elementVector)[i]->GetZ(); |
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132 | G4int nShells = NumberOfComponents(Z); |
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133 | |
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134 | energies = new G4DataVector; |
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135 | cs = new G4DataVector; |
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136 | |
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137 | log_energies = new G4DataVector; |
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138 | log_cs = new G4DataVector; |
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139 | |
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140 | G4double density = nAtomsPerVolume[i]; |
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141 | |
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142 | for (G4int bin=0; bin<nOfBins; bin++) { |
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143 | |
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144 | G4double e = energyVector[bin]; |
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145 | energies->push_back(e); |
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146 | log_energies->push_back(std::log10(e)); |
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147 | G4double value = 0.0; |
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148 | G4double log_value = -300; |
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149 | |
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150 | if(e > tcut) { |
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151 | for (G4int n=0; n<nShells; n++) { |
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152 | G4double cross = FindValue(Z, e, n); |
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153 | G4double p = theParam->Probability(Z, tcut, e, e, n); |
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154 | value += cross * p * density; |
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155 | |
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156 | if(verbose>0 && m == 0 && e>=1. && e<=0.) |
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157 | { |
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158 | G4cout << "G4eIonCrossSH: e(MeV)= " << e/MeV |
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159 | << " n= " << n |
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160 | << " cross= " << cross |
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161 | << " p= " << p |
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162 | << " value= " << value |
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163 | << " tcut(MeV)= " << tcut/MeV |
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164 | << " rho= " << density |
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165 | << " Z= " << Z |
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166 | << G4endl; |
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167 | } |
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168 | |
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169 | } |
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170 | if (value == 0.) value = 1e-300; |
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171 | log_value = std::log10(value); |
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172 | } |
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173 | cs->push_back(value); |
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174 | log_cs->push_back(log_value); |
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175 | } |
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176 | G4VDataSetAlgorithm* algo = interp->Clone(); |
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177 | |
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178 | //G4VEMDataSet* elSet = new G4EMDataSet(i,energies,cs,algo,1.,1.); |
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179 | |
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180 | G4VEMDataSet* elSet = new G4EMDataSet(i,energies,cs,log_energies,log_cs,algo,1.,1.); |
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181 | |
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182 | setForMat->AddComponent(elSet); |
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183 | } |
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184 | set->push_back(setForMat); |
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185 | } |
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186 | |
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187 | return set; |
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188 | } |
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189 | |
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190 | G4double G4eIonisationCrossSectionHandler::GetCrossSectionAboveThresholdForElement(G4double energy, |
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191 | G4double cutEnergy, |
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192 | G4int Z) |
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193 | { |
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194 | G4int nShells = NumberOfComponents(Z); |
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195 | G4double value = 0.; |
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196 | if(energy > cutEnergy) |
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197 | { |
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198 | for (G4int n=0; n<nShells; n++) { |
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199 | G4double cross = FindValue(Z, energy, n); |
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200 | G4double p = theParam->Probability(Z, cutEnergy, energy, energy, n); |
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201 | value += cross * p; |
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202 | } |
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203 | } |
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204 | return value; |
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205 | } |
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