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: G4CrossSectionIonisationBorn.cc,v 1.2 2007/11/08 18:51:34 pia Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
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31 | // |
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32 | // Reference: TNS Geant4-DNA paper |
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33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978 |
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34 | |
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35 | // History: |
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36 | // ----------- |
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37 | // Date Name Modification |
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38 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper |
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39 | // |
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40 | // ------------------------------------------------------------------- |
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41 | |
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42 | // Class description: |
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43 | // Geant4-DNA Cross total cross section for electron elastic scattering in water |
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44 | // Reference: TNS Geant4-DNA paper |
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45 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation: |
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46 | // design foundation and implementation of the first set of models, |
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47 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007. |
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48 | // Further documentation available from http://www.ge.infn.it/geant4/dna |
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49 | |
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50 | // ------------------------------------------------------------------- |
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51 | |
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52 | |
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53 | #include "G4CrossSectionIonisationBorn.hh" |
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54 | #include "G4ParticleDefinition.hh" |
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55 | #include "G4Electron.hh" |
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56 | #include "G4Proton.hh" |
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57 | #include "G4Track.hh" |
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58 | #include "G4LogLogInterpolation.hh" |
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59 | #include "G4SystemOfUnits.hh" |
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60 | |
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61 | |
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62 | G4CrossSectionIonisationBorn::G4CrossSectionIonisationBorn() |
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63 | { |
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64 | |
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65 | name = "IonisationBorn"; |
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66 | |
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67 | // Default energy limits (defined for protection against anomalous behaviour only) |
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68 | lowEnergyLimitDefault = 25 * eV; |
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69 | highEnergyLimitDefault = 30 * keV; |
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70 | |
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71 | G4String fileElectron("dna/sigma_ionisation_e_born"); |
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72 | G4String fileProton("dna/sigma_ionisation_p_born"); |
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73 | |
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74 | G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition(); |
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75 | G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition(); |
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76 | |
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77 | G4String electron; |
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78 | G4String proton; |
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79 | |
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80 | // Factor to scale microscopic/macroscopic cross section data in water |
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81 | // ---- MGP ---- Hardcoded (taken from prototype code); to be replaced with proper calculation |
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82 | G4double scaleFactor = (1.e-22 / 3.343) * m*m; |
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83 | |
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84 | |
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85 | // Data members for electrons |
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86 | |
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87 | if (electronDef != 0) |
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88 | { |
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89 | electron = electronDef->GetParticleName(); |
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90 | tableFile[electron] = fileElectron; |
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91 | |
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92 | // Energy limits |
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93 | lowEnergyLimit[electron] = 25. * eV; |
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94 | highEnergyLimit[electron] = 30. * keV; |
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95 | |
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96 | // Create data set with electron cross section data and load values stored in file |
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97 | G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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98 | tableE->LoadData(fileElectron); |
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99 | |
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100 | // Insert key-table pair in map |
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101 | tableData[electron] = tableE; |
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102 | } |
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103 | else |
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104 | { |
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105 | G4Exception("G4CrossSectionIonisationBorn Constructor: electron is not defined"); |
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106 | } |
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107 | |
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108 | // Data members for protons |
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109 | |
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110 | if (protonDef != 0) |
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111 | { |
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112 | proton = protonDef->GetParticleName(); |
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113 | tableFile[proton] = fileProton; |
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114 | |
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115 | // Energy limits |
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116 | lowEnergyLimit[proton] = 500. * keV; |
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117 | highEnergyLimit[proton] = 10. * MeV; |
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118 | |
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119 | // Create data set with proton cross section data and load values stored in file |
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120 | G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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121 | tableP->LoadData(fileProton); |
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122 | |
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123 | // Insert key-table pair in map |
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124 | tableData[proton] = tableP; |
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125 | } |
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126 | else |
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127 | { |
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128 | G4Exception("G4CrossSectionIonisationBorn Constructor: proton is not defined"); |
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129 | } |
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130 | } |
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131 | |
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132 | |
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133 | G4CrossSectionIonisationBorn::~G4CrossSectionIonisationBorn() |
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134 | { |
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135 | // Destroy the content of the map |
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136 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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137 | for (pos = tableData.begin(); pos != tableData.end(); ++pos) |
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138 | { |
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139 | G4DNACrossSectionDataSet* table = pos->second; |
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140 | delete table; |
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141 | } |
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142 | } |
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143 | |
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144 | |
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145 | |
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146 | G4double G4CrossSectionIonisationBorn::CrossSection(const G4Track& track ) |
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147 | { |
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148 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
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149 | G4double k = particle->GetKineticEnergy(); |
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150 | |
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151 | // Cross section = 0 outside the energy validity limits set in the constructor |
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152 | G4double sigma = 0.; |
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153 | |
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154 | // ---- MGP ---- Better handling of these limits to be set in a following design iteration |
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155 | G4double lowLim = lowEnergyLimitDefault; |
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156 | G4double highLim = highEnergyLimitDefault; |
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157 | |
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158 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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159 | |
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160 | // Retrieve energy limits for the current particle type |
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161 | |
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162 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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163 | pos1 = lowEnergyLimit.find(particleName); |
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164 | |
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165 | // Lower limit |
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166 | if (pos1 != lowEnergyLimit.end()) |
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167 | { |
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168 | lowLim = pos1->second; |
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169 | } |
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170 | |
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171 | // Upper limit |
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172 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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173 | pos2 = highEnergyLimit.find(particleName); |
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174 | |
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175 | if (pos2 != highEnergyLimit.end()) |
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176 | { |
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177 | highLim = pos2->second; |
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178 | } |
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179 | |
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180 | // Verify that the current track is within the energy limits of validity of the cross section model |
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181 | if (k > lowLim && k < highLim) |
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182 | { |
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183 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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184 | pos = tableData.find(particleName); |
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185 | |
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186 | if (pos != tableData.end()) |
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187 | { |
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188 | G4DNACrossSectionDataSet* table = pos->second; |
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189 | if (table != 0) |
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190 | { |
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191 | // Cross section |
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192 | sigma = table->FindValue(k); |
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193 | } |
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194 | } |
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195 | else |
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196 | { |
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197 | // The track does not corresponds to a particle pertinent to this model |
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198 | G4Exception("G4CrossSectionIonisationBorn: attempting to calculate cross section for wrong particle"); |
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199 | } |
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200 | } |
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201 | |
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202 | return sigma; |
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203 | } |
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204 | |
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