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: G4CrossSectionExcitationMillerGreen.cc,v 1.3 2007/11/09 20:11:04 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 "G4CrossSectionExcitationMillerGreen.hh" |
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54 | #include "G4Track.hh" |
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55 | #include "G4DynamicParticle.hh" |
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56 | #include "G4Proton.hh" |
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57 | #include "G4CrossSectionExcitationEmfietzoglouPartial.hh" |
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58 | #include "G4DNAGenericIonsManager.hh" |
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59 | |
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60 | G4CrossSectionExcitationMillerGreen::G4CrossSectionExcitationMillerGreen() |
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61 | { |
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62 | // Default energy limits (defined for protection against anomalous behaviour only) |
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63 | name = "ExcitationMillerGreen"; |
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64 | lowEnergyLimitDefault = 10 * eV; |
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65 | highEnergyLimitDefault = 10 * MeV; |
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66 | |
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67 | G4DNAGenericIonsManager *instance; |
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68 | instance = G4DNAGenericIonsManager::Instance(); |
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69 | G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition(); |
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70 | G4ParticleDefinition* alphaPlusPlusDef = instance->GetIon("alpha++"); |
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71 | G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+"); |
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72 | G4ParticleDefinition* heliumDef = instance->GetIon("helium"); |
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73 | |
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74 | G4String proton; |
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75 | G4String alphaPlusPlus; |
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76 | G4String alphaPlus; |
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77 | G4String helium; |
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78 | |
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79 | if (protonDef != 0) |
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80 | { |
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81 | proton = protonDef->GetParticleName(); |
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82 | lowEnergyLimit[proton] = 10. * eV; |
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83 | highEnergyLimit[proton] = 500. * keV; |
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84 | } |
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85 | else |
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86 | { |
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87 | G4Exception("G4CrossSectionExcitationMillerGreen Constructor: proton is not defined"); |
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88 | } |
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89 | |
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90 | if (alphaPlusPlusDef != 0) |
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91 | { |
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92 | alphaPlusPlus = alphaPlusPlusDef->GetParticleName(); |
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93 | lowEnergyLimit[alphaPlusPlus] = 1. * keV; |
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94 | highEnergyLimit[alphaPlusPlus] = 10. * MeV; |
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95 | } |
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96 | else |
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97 | { |
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98 | G4Exception("G4CrossSectionExcitationMillerGreen Constructor: alphaPlusPlus is not defined"); |
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99 | } |
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100 | |
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101 | if (alphaPlusDef != 0) |
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102 | { |
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103 | alphaPlus = alphaPlusDef->GetParticleName(); |
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104 | lowEnergyLimit[alphaPlus] = 1. * keV; |
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105 | highEnergyLimit[alphaPlus] = 10. * MeV; |
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106 | } |
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107 | else |
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108 | { |
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109 | G4Exception("G4CrossSectionExcitationMillerGreen Constructor: alphaPlus is not defined"); |
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110 | } |
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111 | |
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112 | if (heliumDef != 0) |
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113 | { |
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114 | helium = heliumDef->GetParticleName(); |
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115 | lowEnergyLimit[helium] = 1. * keV; |
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116 | highEnergyLimit[helium] = 10. * MeV; |
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117 | } |
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118 | else |
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119 | { |
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120 | G4Exception("G4CrossSectionExcitationMillerGreen Constructor: helium is not defined"); |
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121 | } |
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122 | |
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123 | |
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124 | } |
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125 | |
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126 | |
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127 | G4CrossSectionExcitationMillerGreen::~G4CrossSectionExcitationMillerGreen() |
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128 | {} |
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129 | |
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130 | |
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131 | G4double G4CrossSectionExcitationMillerGreen::CrossSection(const G4Track& track) |
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132 | { |
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133 | G4DNAGenericIonsManager *instance; |
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134 | instance = G4DNAGenericIonsManager::Instance(); |
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135 | |
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136 | if ( |
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137 | track.GetDefinition() != G4Proton::ProtonDefinition() |
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138 | && |
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139 | track.GetDefinition() != instance->GetIon("alpha++") |
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140 | && |
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141 | track.GetDefinition() != instance->GetIon("alpha+") |
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142 | && |
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143 | track.GetDefinition() != instance->GetIon("helium") |
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144 | ) |
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145 | |
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146 | G4Exception("G4CrossSectionMillerGreen: attempting to calculate cross section for wrong particle"); |
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147 | |
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148 | G4double lowLim = lowEnergyLimitDefault; |
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149 | G4double highLim = highEnergyLimitDefault; |
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150 | |
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151 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
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152 | G4double k = particle->GetKineticEnergy(); |
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153 | |
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154 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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155 | |
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156 | // Retrieve energy limits for the current particle type |
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157 | |
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158 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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159 | pos1 = lowEnergyLimit.find(particleName); |
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160 | |
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161 | // Lower limit |
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162 | if (pos1 != lowEnergyLimit.end()) |
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163 | { |
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164 | lowLim = pos1->second; |
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165 | } |
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166 | |
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167 | // Upper limit |
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168 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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169 | pos2 = highEnergyLimit.find(particleName); |
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170 | |
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171 | if (pos2 != highEnergyLimit.end()) |
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172 | { |
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173 | highLim = pos2->second; |
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174 | } |
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175 | |
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176 | // |
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177 | const G4ParticleDefinition* particleDefinition = track.GetDefinition(); |
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178 | |
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179 | G4double crossSection(0.); |
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180 | |
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181 | if (k >= lowLim && k <= highLim) |
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182 | { |
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183 | |
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184 | crossSection = partialCrossSection.Sum(k,particleDefinition); |
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185 | G4DNAGenericIonsManager *instance; |
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186 | instance = G4DNAGenericIonsManager::Instance(); |
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187 | |
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188 | // add ONE or TWO electron-water excitation for alpha+ and helium |
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189 | |
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190 | if ( particleDefinition == instance->GetIon("alpha+") |
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191 | || |
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192 | particleDefinition == instance->GetIon("helium") |
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193 | ) |
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194 | { |
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195 | G4CrossSectionExcitationEmfietzoglouPartial * excitationXS = |
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196 | new G4CrossSectionExcitationEmfietzoglouPartial(); |
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197 | G4double sigmaExcitation=0; |
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198 | if (k*0.511/3728 > 7.4*eV && k*0.511/3728 < 10*keV) sigmaExcitation = excitationXS->Sum(k*0.511/3728); |
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199 | |
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200 | if ( particleDefinition == instance->GetIon("alpha+") ) |
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201 | crossSection = crossSection + sigmaExcitation ; |
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202 | if ( particleDefinition == instance->GetIon("helium") ) |
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203 | crossSection = crossSection + 2*sigmaExcitation ; |
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204 | delete excitationXS; |
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205 | } |
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206 | } |
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207 | |
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208 | return crossSection; |
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209 | } |
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210 | |
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