1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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9 | // * include a list of copyright holders. * |
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11 | // * Neither the authors of this software system, nor their employing * |
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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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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: G4EmElementSelector.cc,v 1.10 2009/05/26 16:59:35 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03-beta-cand-01 $ |
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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: G4EmElementSelector |
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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: 29.05.2008 |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // Class Description: |
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43 | // |
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44 | // Generic helper class for the random selection of an element |
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45 | |
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46 | // ------------------------------------------------------------------- |
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47 | // |
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48 | |
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49 | #include "G4EmElementSelector.hh" |
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50 | #include "G4VEmModel.hh" |
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51 | |
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52 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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53 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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54 | |
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55 | G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod, |
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56 | const G4Material* mat, |
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57 | G4int bins, |
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58 | G4double emin, |
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59 | G4double emax, |
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60 | G4bool /*spline*/): |
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61 | model(mod), material(mat), nbins(bins), cutEnergy(-1.0), |
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62 | lowEnergy(emin), highEnergy(emax) |
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63 | { |
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64 | G4int n = material->GetNumberOfElements(); |
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65 | nElmMinusOne = n - 1; |
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66 | theElementVector = material->GetElementVector(); |
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67 | element = (*theElementVector)[0]; |
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68 | if(nElmMinusOne > 0) { |
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69 | xSections.reserve(n); |
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70 | for(G4int i=0; i<n; i++) { |
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71 | G4PhysicsLogVector* v = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins); |
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72 | //v->SetSpline(spline); |
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73 | xSections.push_back(v); |
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74 | } |
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75 | } |
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76 | //G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n << G4endl; |
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77 | } |
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78 | |
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79 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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80 | |
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81 | G4EmElementSelector::~G4EmElementSelector() |
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82 | { |
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83 | if(nElmMinusOne > 0) { |
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84 | for(G4int i=0; i<=nElmMinusOne; i++) { |
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85 | delete xSections[i]; |
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86 | } |
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87 | } |
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88 | } |
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89 | |
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90 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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91 | |
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92 | void G4EmElementSelector::Initialise(const G4ParticleDefinition* part, |
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93 | G4double cut) |
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94 | { |
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95 | //G4cout << "G4EmElementSelector initialise for " << material->GetName() << G4endl; |
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96 | if(0 == nElmMinusOne || cut == cutEnergy) return; |
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97 | |
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98 | cutEnergy = cut; |
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99 | //G4cout << "cut(keV)= " << cut/keV << G4endl; |
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100 | G4double cross; |
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101 | |
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102 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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103 | |
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104 | G4int i; |
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105 | |
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106 | // loop over bins |
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107 | for(G4int j=0; j<nbins; j++) { |
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108 | G4double e = (xSections[0])->GetLowEdgeEnergy(j); |
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109 | model->SetupForMaterial(part, material, e); |
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110 | cross = 0.0; |
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111 | //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl; |
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112 | for (i=0; i<=nElmMinusOne; i++) { |
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113 | cross += theAtomNumDensityVector[i]* |
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114 | model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e, |
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115 | cutEnergy, e); |
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116 | xSections[i]->PutValue(j, cross); |
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117 | } |
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118 | } |
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119 | |
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120 | // xSections start from null, so use probabilities from the next bin |
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121 | if(DBL_MIN >= (*xSections[nElmMinusOne])[0]) { |
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122 | for (i=0; i<=nElmMinusOne; i++) { |
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123 | xSections[i]->PutValue(0, (*xSections[i])[1]); |
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124 | } |
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125 | } |
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126 | // xSections ends with null, so use probabilities from the previous bin |
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127 | if(DBL_MIN >= (*xSections[nElmMinusOne])[nbins-1]) { |
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128 | for (i=0; i<=nElmMinusOne; i++) { |
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129 | xSections[i]->PutValue(nbins-1, (*xSections[i])[nbins-2]); |
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130 | } |
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131 | } |
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132 | // perform normalization |
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133 | for(G4int j=0; j<nbins; j++) { |
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134 | cross = (*xSections[nElmMinusOne])[j]; |
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135 | // only for positive X-section |
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136 | if(cross > DBL_MIN) { |
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137 | for (i=0; i<nElmMinusOne; i++) { |
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138 | xSections[i]->PutValue(j, (*xSections[i])[j]/cross); |
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139 | } |
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140 | } |
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141 | } |
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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 | void G4EmElementSelector::Dump(const G4ParticleDefinition* part) |
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147 | { |
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148 | G4cout << "======== G4EmElementSelector for the " << model->GetName(); |
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149 | if(part) G4cout << " and " << part->GetParticleName(); |
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150 | G4cout << " for " << material->GetName() << " ========" << G4endl; |
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151 | if(0 < nElmMinusOne) { |
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152 | for(G4int i=0; i<nElmMinusOne; i++) { |
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153 | G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl; |
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154 | G4cout << *(xSections[i]) << G4endl; |
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155 | } |
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156 | } |
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157 | G4cout << "Last Element in element vector " |
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158 | << (*theElementVector)[nElmMinusOne]->GetName() |
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159 | << G4endl; |
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160 | } |
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161 | |
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162 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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163 | |
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164 | |
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