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: G4FinalStateChargeTransferProton.cc,v 1.2 2009/06/10 13:32:36 mantero Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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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 | // Final state generation for charge transfer: |
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44 | // incident proton hydrocarbon target |
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45 | // outgoing neutral hydrogen |
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46 | // Further documentation available from http://www.ge.infn.it/geant4/ |
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47 | |
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48 | // ------------------------------------------------------------------- |
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49 | |
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50 | |
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51 | #include "G4FinalStateChargeTransferProton.hh" |
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52 | #include "G4Track.hh" |
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53 | #include "G4Step.hh" |
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54 | #include "G4DynamicParticle.hh" |
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55 | #include "G4Material.hh" |
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56 | #include "G4ParticleDefinition.hh" |
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57 | #include "G4SystemOfUnits.hh" |
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58 | #include "G4DNAGenericIonsManager.hh" |
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59 | |
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60 | G4FinalStateChargeTransferProton::G4FinalStateChargeTransferProton() |
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61 | { |
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62 | name = "ChargeTransferProton"; |
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63 | lowEnergyLimit = 0.1 * eV; |
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64 | highEnergyLimit = 1000. * MeV; |
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65 | |
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66 | // Proton binding |
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67 | protonBinding = 13.6 * eV; |
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68 | |
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69 | // Ionisation potentials |
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70 | G4String materialName; |
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71 | G4double potential = 0.; |
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72 | |
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73 | materialName = "CH"; |
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74 | potential = 11.13 * eV; |
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75 | ioniPotentialMap[materialName] = potential; |
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76 | |
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77 | materialName = "H2O"; |
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78 | potential = 10.79 * eV; |
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79 | ioniPotentialMap[materialName] = potential; |
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80 | |
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81 | materialName = "CH4"; |
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82 | potential = 12.51 * eV; |
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83 | ioniPotentialMap[materialName] = potential; |
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84 | |
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85 | materialName = "C2H6"; |
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86 | potential = 11.52 * eV; |
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87 | ioniPotentialMap[materialName] = potential; |
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88 | |
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89 | materialName = "C3H8"; |
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90 | potential = 11.08 * eV; |
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91 | ioniPotentialMap[materialName] = potential; |
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92 | |
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93 | materialName = "CH3"; |
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94 | potential = 9.84 * eV; |
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95 | ioniPotentialMap[materialName] = potential; |
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96 | |
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97 | materialName = "C2H5"; |
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98 | potential = 8.25 * eV; |
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99 | ioniPotentialMap[materialName] = potential; |
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100 | ioniPotentialMap[materialName] = potential; |
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101 | |
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102 | materialName = "C3H7"; |
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103 | potential = 9.10 * eV; |
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104 | ioniPotentialMap[materialName] = potential; |
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105 | |
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106 | materialName = "CH2"; |
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107 | potential = 10.46 * eV; |
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108 | ioniPotentialMap[materialName] = potential; |
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109 | |
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110 | materialName = "C2H4"; |
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111 | potential = 10.51 * eV; |
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112 | ioniPotentialMap[materialName] = potential; |
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113 | |
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114 | materialName = "C3H6"; |
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115 | potential = 9.74 * eV; |
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116 | ioniPotentialMap[materialName] = potential; |
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117 | |
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118 | materialName = "CH"; |
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119 | potential = 11.13 * eV; |
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120 | ioniPotentialMap[materialName] = potential; |
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121 | |
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122 | materialName = "C2H3"; |
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123 | potential = 9.45 * eV; |
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124 | ioniPotentialMap[materialName] = potential; |
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125 | |
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126 | materialName = "C3H5"; |
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127 | potential = 9.90 * eV; |
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128 | ioniPotentialMap[materialName] = potential; |
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129 | |
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130 | materialName = "C2H2"; |
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131 | potential = 11.51 * eV; |
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132 | ioniPotentialMap[materialName] = potential; |
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133 | |
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134 | materialName = "C3H4"; |
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135 | potential = 10.02 * eV; |
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136 | ioniPotentialMap[materialName] = potential; |
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137 | |
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138 | materialName = "C2H"; |
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139 | potential = 17.42 * eV; |
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140 | ioniPotentialMap[materialName] = potential; |
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141 | |
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142 | materialName = "Propyne"; |
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143 | potential = 10.36 * eV; |
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144 | ioniPotentialMap[materialName] = potential; |
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145 | |
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146 | materialName = "Allene"; |
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147 | potential = 9.69 * eV; |
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148 | ioniPotentialMap[materialName] = potential; |
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149 | |
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150 | materialName = "C3H3"; |
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151 | potential = 8.34 * eV; |
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152 | ioniPotentialMap[materialName] = potential; |
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153 | |
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154 | materialName = "C3H2"; |
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155 | potential = 12.50 * eV; |
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156 | ioniPotentialMap[materialName] = potential; |
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157 | |
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158 | materialName = "C3H"; |
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159 | potential = 13.40 * eV; |
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160 | ioniPotentialMap[materialName] = potential; |
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161 | |
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162 | materialName = "N2"; |
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163 | potential = 15.58 * eV; |
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164 | ioniPotentialMap[materialName] = potential; |
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165 | |
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166 | materialName = "O2"; |
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167 | potential = 12.07 * eV; |
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168 | ioniPotentialMap[materialName] = potential; |
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169 | |
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170 | materialName = "CO2"; |
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171 | potential = 13.77 * eV; |
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172 | ioniPotentialMap[materialName] = potential; |
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173 | |
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174 | materialName = "CO"; |
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175 | potential = 14.01 * eV; |
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176 | ioniPotentialMap[materialName] = potential; |
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177 | |
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178 | materialName = "NH3"; |
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179 | potential = 10.07 * eV; |
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180 | ioniPotentialMap[materialName] = potential; |
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181 | |
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182 | materialName = "NO"; |
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183 | potential = 9.26 * eV; |
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184 | ioniPotentialMap[materialName] = potential; |
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185 | } |
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186 | |
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187 | |
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188 | G4FinalStateChargeTransferProton::~G4FinalStateChargeTransferProton() |
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189 | { } |
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190 | |
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191 | |
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192 | const G4FinalStateProduct& G4FinalStateChargeTransferProton::GenerateFinalState(const G4Track& track, |
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193 | const G4Step& /* step */) |
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194 | { |
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195 | // Clear previous secondaries, energy deposit and particle kill status |
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196 | product.Clear(); |
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197 | |
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198 | G4double e = track.GetDynamicParticle()->GetKineticEnergy(); |
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199 | |
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200 | // Get the material the track is in |
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201 | G4Material* material = track.GetMaterial(); |
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202 | G4String materialName; |
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203 | materialName = material->GetName(); |
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204 | |
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205 | // Check whether cross section data are available for the current material |
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206 | |
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207 | std::map<G4String,G4double,std::less<G4String> >::const_iterator pos; |
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208 | pos = ioniPotentialMap.find(materialName); |
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209 | |
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210 | // Generate final state only if the material is among those included in the ionisation potential |
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211 | // database; otherwise do nothing |
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212 | if (pos!= ioniPotentialMap.end()) |
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213 | { |
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214 | // Ionisation potential of the medium |
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215 | G4double potential = (*pos).second; |
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216 | |
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217 | // Kinetic energy of the outgoing hydrogen ion |
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218 | G4double eProduct = e - (e * electron_mass_c2/proton_mass_c2) - potential + protonBinding; |
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219 | |
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220 | if (eProduct < 0) |
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221 | { |
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222 | G4String message; |
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223 | message="ChargeTransferProton::GenerateFinalState - Secondary product has negative kinetic energy"; |
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224 | G4Exception(message); |
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225 | } |
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226 | |
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227 | // Primary particle is killed |
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228 | product.KillPrimaryParticle(); |
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229 | |
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230 | // Deposit the ionisation potential equivalent locally |
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231 | product.AddEnergyDeposit(potential); |
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232 | |
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233 | //Secondary particle |
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234 | // Create a Hydrogen ion, same direction as the incoming proton |
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235 | G4DNAGenericIonsManager* instance = G4DNAGenericIonsManager::Instance(); |
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236 | G4ParticleDefinition* hydrogenDefinition = instance->GetIon("hydrogen"); |
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237 | |
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238 | |
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239 | G4DynamicParticle* secondary = new G4DynamicParticle(hydrogenDefinition, |
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240 | track.GetDynamicParticle()->GetMomentumDirection(), |
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241 | eProduct); |
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242 | product.AddSecondary(secondary); |
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243 | |
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244 | } |
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245 | |
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246 | return product; |
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247 | } |
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