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 | // $Id: G4FinalStateIonisationBorn.cc,v 1.9 2007/11/26 17:27:09 pia Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // Contact Author: Sebastien Incerti (incerti@cenbg.in2p3.fr) |
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31 | // Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
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32 | // |
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33 | // Reference: TNS Geant4-DNA paper |
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34 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978 |
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35 | |
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36 | // History: |
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37 | // ----------- |
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38 | // Date Name Modification |
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39 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper |
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40 | // Nov 2007 S. Incerti Implementation |
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41 | // 26 Nov 2007 MGP Cleaned up std:: |
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42 | // |
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43 | // ------------------------------------------------------------------- |
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44 | |
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45 | // Class description: |
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46 | // Reference: TNS Geant4-DNA paper |
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47 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation: |
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48 | // design foundation and implementation of the first set of models, |
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49 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007. |
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50 | // Further documentation available from http://www.ge.infn.it/geant4/dna |
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51 | |
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52 | // ------------------------------------------------------------------- |
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53 | |
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54 | |
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55 | #include "G4FinalStateIonisationBorn.hh" |
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56 | #include "G4Track.hh" |
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57 | #include "G4Step.hh" |
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58 | #include "G4DynamicParticle.hh" |
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59 | #include "Randomize.hh" |
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60 | |
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61 | #include "G4ParticleTypes.hh" |
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62 | #include "G4ParticleDefinition.hh" |
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63 | #include "G4Electron.hh" |
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64 | #include "G4Proton.hh" |
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65 | #include "G4SystemOfUnits.hh" |
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66 | #include "G4ParticleMomentum.hh" |
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67 | |
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68 | |
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69 | G4FinalStateIonisationBorn::G4FinalStateIonisationBorn() |
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70 | { |
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71 | |
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72 | name = "IonisationBorn"; |
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73 | |
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74 | // NEW |
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75 | // Factor to scale microscopic/macroscopic cross section data in water |
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76 | |
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77 | G4double scaleFactor = (1.e-22 / 3.343) * m*m; |
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78 | |
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79 | // Energy limits |
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80 | G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition(); |
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81 | G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition(); |
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82 | |
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83 | G4String electron; |
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84 | G4String proton; |
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85 | |
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86 | // Default energy limits (defined for protection against anomalous behaviour only) |
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87 | lowEnergyLimitDefault = 25 * eV; |
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88 | highEnergyLimitDefault = 10 * MeV; |
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89 | |
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90 | char *path = getenv("G4LEDATA"); |
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91 | |
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92 | if (!path) |
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93 | G4Exception("G4DNACrossSectionDataSet::FullFileName - G4LEDATA environment variable not set"); |
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94 | |
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95 | // Data members for electrons |
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96 | |
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97 | if (electronDef != 0) |
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98 | { |
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99 | electron = electronDef->GetParticleName(); |
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100 | lowEnergyLimit[electron] = 25. * eV; |
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101 | highEnergyLimit[electron] = 30. * keV; |
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102 | |
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103 | std::ostringstream eFullFileName; |
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104 | eFullFileName << path << "/dna/sigmadiff_ionisation_e_born.dat"; |
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105 | std::ifstream eDiffCrossSection(eFullFileName.str().c_str()); |
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106 | // eDiffCrossSection(eFullFileName.str().c_str()); |
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107 | if (!eDiffCrossSection) |
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108 | { |
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109 | // G4cout << "ERROR OPENING DATA FILE IN ELECTRON BORN IONIZATION !!! " << G4endl; |
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110 | G4Exception("G4FinalStateIonisationBorn::ERROR OPENING electron DATA FILE"); |
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111 | while(1); // ---- MGP ---- What is this? |
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112 | } |
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113 | |
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114 | eTdummyVec.push_back(0.); |
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115 | while(!eDiffCrossSection.eof()) |
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116 | { |
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117 | double tDummy; |
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118 | double eDummy; |
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119 | eDiffCrossSection>>tDummy>>eDummy; |
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120 | if (tDummy != eTdummyVec.back()) eTdummyVec.push_back(tDummy); |
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121 | for (int j=0; j<5; j++) |
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122 | { |
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123 | eDiffCrossSection>>eDiffCrossSectionData[j][tDummy][eDummy]; |
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124 | eDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor; |
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125 | eVecm[tDummy].push_back(eDummy); |
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126 | } |
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127 | } |
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128 | |
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129 | } |
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130 | else |
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131 | { |
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132 | G4Exception("G4FinalStateIonisationBorn Constructor: electron is not defined"); |
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133 | } |
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134 | |
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135 | // Data members for protons |
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136 | |
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137 | if (protonDef != 0) |
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138 | { |
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139 | proton = protonDef->GetParticleName(); |
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140 | lowEnergyLimit[proton] = 500. * keV; |
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141 | highEnergyLimit[proton] = 10. * MeV; |
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142 | |
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143 | std::ostringstream pFullFileName; |
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144 | pFullFileName << path << "/dna/sigmadiff_ionisation_p_born.dat"; |
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145 | std::ifstream pDiffCrossSection(pFullFileName.str().c_str()); |
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146 | // pDiffCrossSection(pFullFileName.str().c_str()); |
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147 | if (!pDiffCrossSection) |
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148 | { |
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149 | // G4cout<<"ERROR OPENING DATA FILE IN PROTON BORN IONIZATION !!! "<<G4endl; |
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150 | G4Exception("G4FinalStateIonisationBorn::ERROR OPENING proton DATA FILE"); |
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151 | while(1); // ---- MGP ---- What is this? |
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152 | } |
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153 | |
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154 | pTdummyVec.push_back(0.); |
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155 | while(!pDiffCrossSection.eof()) |
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156 | { |
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157 | double tDummy; |
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158 | double eDummy; |
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159 | pDiffCrossSection>>tDummy>>eDummy; |
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160 | if (tDummy != pTdummyVec.back()) pTdummyVec.push_back(tDummy); |
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161 | for (int j=0; j<5; j++) |
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162 | { |
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163 | pDiffCrossSection>>pDiffCrossSectionData[j][tDummy][eDummy]; |
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164 | pDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor; |
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165 | //G4cout << "j=" << j << " Tdum=" << tDummy << " Edum=" << eDummy << " pDiff=" << pDiffCrossSectionData[j][tDummy][eDummy] << G4endl; |
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166 | pVecm[tDummy].push_back(eDummy); |
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167 | } |
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168 | } |
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169 | } |
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170 | else |
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171 | { |
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172 | G4Exception("G4FinalStateIonisationBorn Constructor: proton is not defined"); |
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173 | } |
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174 | } |
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175 | |
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176 | |
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177 | G4FinalStateIonisationBorn::~G4FinalStateIonisationBorn() |
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178 | { |
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179 | eVecm.clear(); |
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180 | pVecm.clear(); |
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181 | } |
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182 | |
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183 | |
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184 | const G4FinalStateProduct& G4FinalStateIonisationBorn::GenerateFinalState(const G4Track& track, const G4Step& /* step */) |
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185 | { |
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186 | // Clear previous secondaries, energy deposit and particle kill status |
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187 | product.Clear(); |
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188 | |
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189 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
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190 | |
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191 | G4double lowLim = lowEnergyLimitDefault; |
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192 | G4double highLim = highEnergyLimitDefault; |
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193 | |
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194 | G4double k = particle->GetKineticEnergy(); |
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195 | |
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196 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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197 | |
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198 | // Retrieve energy limits for the current particle type |
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199 | |
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200 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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201 | pos1 = lowEnergyLimit.find(particleName); |
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202 | |
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203 | // Lower limit |
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204 | if (pos1 != lowEnergyLimit.end()) |
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205 | { |
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206 | lowLim = pos1->second; |
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207 | } |
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208 | |
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209 | // Upper limit |
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210 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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211 | pos2 = highEnergyLimit.find(particleName); |
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212 | |
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213 | if (pos2 != highEnergyLimit.end()) |
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214 | { |
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215 | highLim = pos2->second; |
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216 | } |
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217 | |
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218 | // Verify that the current track is within the energy limits of validity of the cross section model |
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219 | |
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220 | if (k >= lowLim && k <= highLim) |
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221 | { |
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222 | // Kinetic energy of primary particle |
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223 | |
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224 | G4ParticleMomentum primaryDirection = particle->GetMomentumDirection(); |
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225 | G4double particleMass = particle->GetDefinition()->GetPDGMass(); |
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226 | G4double totalEnergy = k + particleMass; |
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227 | G4double pSquare = k * (totalEnergy + particleMass); |
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228 | G4double totalMomentum = std::sqrt(pSquare); |
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229 | |
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230 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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231 | |
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232 | G4int ionizationShell = cross.RandomSelect(k,particleName); |
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233 | |
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234 | G4double secondaryKinetic = RandomizeEjectedElectronEnergy(particle->GetDefinition(),k,ionizationShell); |
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235 | |
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236 | G4double bindingEnergy = waterStructure.IonisationEnergy(ionizationShell); |
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237 | |
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238 | G4double cosTheta = 0.; |
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239 | G4double phi = 0.; |
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240 | RandomizeEjectedElectronDirection(track.GetDefinition(), k,secondaryKinetic, cosTheta, phi); |
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241 | |
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242 | G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta); |
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243 | G4double dirX = sinTheta*std::cos(phi); |
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244 | G4double dirY = sinTheta*std::sin(phi); |
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245 | G4double dirZ = cosTheta; |
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246 | G4ThreeVector deltaDirection(dirX,dirY,dirZ); |
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247 | deltaDirection.rotateUz(primaryDirection); |
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248 | |
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249 | G4double deltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic + 2.*electron_mass_c2 )); |
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250 | |
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251 | //Primary Particle Direction |
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252 | G4double finalPx = totalMomentum*primaryDirection.x() - deltaTotalMomentum*deltaDirection.x(); |
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253 | G4double finalPy = totalMomentum*primaryDirection.y() - deltaTotalMomentum*deltaDirection.y(); |
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254 | G4double finalPz = totalMomentum*primaryDirection.z() - deltaTotalMomentum*deltaDirection.z(); |
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255 | G4double finalMomentum = std::sqrt(finalPx*finalPx + finalPy*finalPy + finalPz*finalPz); |
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256 | finalPx /= finalMomentum; |
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257 | finalPy /= finalMomentum; |
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258 | finalPz /= finalMomentum; |
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259 | |
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260 | product.ModifyPrimaryParticle(finalPx,finalPy,finalPz,k-bindingEnergy-secondaryKinetic); |
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261 | product.AddEnergyDeposit(bindingEnergy); |
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262 | |
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263 | G4DynamicParticle* aElectron = new G4DynamicParticle(G4Electron::Electron(),deltaDirection,secondaryKinetic); |
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264 | product.AddSecondary(aElectron); |
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265 | } |
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266 | |
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267 | return product; |
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268 | } |
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269 | |
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270 | |
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271 | G4double G4FinalStateIonisationBorn::RandomizeEjectedElectronEnergy(G4ParticleDefinition* particleDefinition, |
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272 | G4double k, |
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273 | G4int shell) |
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274 | { |
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275 | |
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276 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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277 | { |
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278 | |
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279 | G4double maximumEnergyTransfer=0.; |
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280 | if ((k+waterStructure.IonisationEnergy(shell))/2. > k) maximumEnergyTransfer=k; |
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281 | else maximumEnergyTransfer = (k+waterStructure.IonisationEnergy(shell))/2.; |
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282 | |
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283 | G4double crossSectionMaximum = 0.; |
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284 | for(G4double value=waterStructure.IonisationEnergy(shell); value<=maximumEnergyTransfer; value+=0.1*eV) |
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285 | { |
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286 | G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell); |
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287 | if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection; |
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288 | } |
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289 | |
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290 | G4double secondaryElectronKineticEnergy=0.; |
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291 | do |
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292 | { |
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293 | secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-waterStructure.IonisationEnergy(shell)); |
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294 | } while(G4UniformRand()*crossSectionMaximum > |
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295 | DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell)); |
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296 | |
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297 | return secondaryElectronKineticEnergy; |
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298 | |
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299 | } |
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300 | |
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301 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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302 | { |
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303 | G4double maximumKineticEnergyTransfer = 4.* (electron_mass_c2 / proton_mass_c2) * k - (waterStructure.IonisationEnergy(shell)); |
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304 | |
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305 | G4double crossSectionMaximum = 0.; |
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306 | for (G4double value = waterStructure.IonisationEnergy(shell); |
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307 | value<=4.*waterStructure.IonisationEnergy(shell) ; |
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308 | value+=0.1*eV) |
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309 | { |
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310 | G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell); |
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311 | if (differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection; |
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312 | } |
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313 | |
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314 | G4double secondaryElectronKineticEnergy = 0.; |
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315 | do |
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316 | { |
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317 | secondaryElectronKineticEnergy = G4UniformRand() * maximumKineticEnergyTransfer; |
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318 | } while(G4UniformRand()*crossSectionMaximum >= |
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319 | DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell)); |
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320 | |
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321 | return secondaryElectronKineticEnergy; |
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322 | } |
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323 | |
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324 | return 0; |
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325 | } |
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326 | |
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327 | |
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328 | void G4FinalStateIonisationBorn::RandomizeEjectedElectronDirection(G4ParticleDefinition* particleDefinition, |
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329 | G4double k, |
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330 | G4double secKinetic, |
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331 | G4double & cosTheta, |
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332 | G4double & phi ) |
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333 | { |
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334 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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335 | { |
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336 | |
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337 | phi = twopi * G4UniformRand(); |
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338 | if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.; |
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339 | else if (secKinetic <= 200.*eV) |
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340 | { |
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341 | if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.; |
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342 | else cosTheta = G4UniformRand()*(std::sqrt(2.)/2); |
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343 | } |
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344 | else |
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345 | { |
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346 | G4double sin2O = (1.-secKinetic/k) / (1.+secKinetic/(2.*electron_mass_c2)); |
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347 | cosTheta = std::sqrt(1.-sin2O); |
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348 | } |
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349 | } |
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350 | |
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351 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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352 | { |
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353 | G4double maxSecKinetic = 4.* (electron_mass_c2 / proton_mass_c2) * k; |
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354 | phi = twopi * G4UniformRand(); |
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355 | cosTheta = std::sqrt(secKinetic / maxSecKinetic); |
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356 | } |
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357 | } |
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358 | |
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359 | |
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360 | double G4FinalStateIonisationBorn::DifferentialCrossSection(G4ParticleDefinition * particleDefinition, |
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361 | G4double k, |
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362 | G4double energyTransfer, |
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363 | G4int ionizationLevelIndex) |
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364 | { |
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365 | G4double sigma = 0.; |
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366 | |
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367 | if (energyTransfer >= waterStructure.IonisationEnergy(ionizationLevelIndex)) |
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368 | { |
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369 | G4double valueT1 = 0; |
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370 | G4double valueT2 = 0; |
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371 | G4double valueE21 = 0; |
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372 | G4double valueE22 = 0; |
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373 | G4double valueE12 = 0; |
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374 | G4double valueE11 = 0; |
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375 | |
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376 | G4double xs11 = 0; |
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377 | G4double xs12 = 0; |
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378 | G4double xs21 = 0; |
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379 | G4double xs22 = 0; |
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380 | |
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381 | |
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382 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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383 | { |
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384 | // k should be in eV and energy transfer eV also |
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385 | std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k); |
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386 | std::vector<double>::iterator t1 = t2-1; |
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387 | std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), energyTransfer); |
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388 | std::vector<double>::iterator e11 = e12-1; |
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389 | |
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390 | std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), energyTransfer); |
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391 | std::vector<double>::iterator e21 = e22-1; |
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392 | |
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393 | valueT1 =*t1; |
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394 | valueT2 =*t2; |
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395 | valueE21 =*e21; |
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396 | valueE22 =*e22; |
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397 | valueE12 =*e12; |
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398 | valueE11 =*e11; |
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399 | |
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400 | xs11 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11]; |
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401 | xs12 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12]; |
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402 | xs21 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21]; |
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403 | xs22 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22]; |
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404 | |
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405 | } |
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406 | |
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407 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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408 | { |
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409 | // k should be in eV and energy transfer eV also |
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410 | std::vector<double>::iterator t2 = std::upper_bound(pTdummyVec.begin(),pTdummyVec.end(), k); |
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411 | std::vector<double>::iterator t1 = t2-1; |
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412 | std::vector<double>::iterator e12 = std::upper_bound(pVecm[(*t1)].begin(),pVecm[(*t1)].end(), energyTransfer); |
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413 | std::vector<double>::iterator e11 = e12-1; |
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414 | |
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415 | std::vector<double>::iterator e22 = std::upper_bound(pVecm[(*t2)].begin(),pVecm[(*t2)].end(), energyTransfer); |
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416 | std::vector<double>::iterator e21 = e22-1; |
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417 | |
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418 | valueT1 =*t1; |
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419 | valueT2 =*t2; |
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420 | valueE21 =*e21; |
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421 | valueE22 =*e22; |
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422 | valueE12 =*e12; |
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423 | valueE11 =*e11; |
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424 | |
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425 | xs11 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11]; |
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426 | xs12 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12]; |
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427 | xs21 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21]; |
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428 | xs22 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22]; |
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429 | } |
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430 | |
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431 | G4double xsProduct = xs11 * xs12 * xs21 * xs22; |
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432 | // if (xs11==0 || xs12==0 ||xs21==0 ||xs22==0) return (0.); |
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433 | if (xsProduct != 0.) |
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434 | { |
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435 | sigma = QuadInterpolator(valueE11, valueE12, |
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436 | valueE21, valueE22, |
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437 | xs11, xs12, |
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438 | xs21, xs22, |
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439 | valueT1, valueT2, |
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440 | k, energyTransfer); |
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441 | } |
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442 | } |
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443 | return sigma; |
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444 | } |
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445 | |
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446 | |
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447 | G4double G4FinalStateIonisationBorn::LogLogInterpolate(G4double e1, |
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448 | G4double e2, |
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449 | G4double e, |
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450 | G4double xs1, |
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451 | G4double xs2) |
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452 | { |
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453 | G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1)); |
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454 | G4double b = std::log10(xs2) - a*std::log10(e2); |
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455 | G4double sigma = a*std::log10(e) + b; |
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456 | G4double value = (std::pow(10.,sigma)); |
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457 | return value; |
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458 | } |
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459 | |
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460 | |
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461 | G4double G4FinalStateIonisationBorn::QuadInterpolator(G4double e11, G4double e12, |
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462 | G4double e21, G4double e22, |
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463 | G4double xs11, G4double xs12, |
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464 | G4double xs21, G4double xs22, |
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465 | G4double t1, G4double t2, |
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466 | G4double t, G4double e) |
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467 | { |
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468 | G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12); |
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469 | G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22); |
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470 | G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2); |
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471 | return value; |
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472 | } |
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473 | |
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474 | |
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