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2 | // ******************************************************************** |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4DNADingfelderChargeIncreaseModel.cc,v 1.3 2009/02/16 11:00:11 sincerti Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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28 | // |
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29 | |
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30 | #include "G4DNADingfelderChargeIncreaseModel.hh" |
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31 | |
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32 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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33 | |
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34 | using namespace std; |
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35 | |
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36 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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37 | |
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38 | G4DNADingfelderChargeIncreaseModel::G4DNADingfelderChargeIncreaseModel(const G4ParticleDefinition*, |
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39 | const G4String& nam) |
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40 | :G4VEmModel(nam),isInitialised(false) |
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41 | { |
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42 | |
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43 | verboseLevel= 0; |
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44 | // Verbosity scale: |
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45 | // 0 = nothing |
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46 | // 1 = warning for energy non-conservation |
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47 | // 2 = details of energy budget |
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48 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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49 | // 4 = entering in methods |
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50 | |
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51 | G4cout << "Dingfelder charge increase model is constructed " << G4endl; |
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52 | |
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53 | } |
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54 | |
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55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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56 | |
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57 | G4DNADingfelderChargeIncreaseModel::~G4DNADingfelderChargeIncreaseModel() |
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58 | {} |
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59 | |
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60 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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61 | |
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62 | void G4DNADingfelderChargeIncreaseModel::Initialise(const G4ParticleDefinition* particle, |
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63 | const G4DataVector& /*cuts*/) |
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64 | { |
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65 | |
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66 | if (verboseLevel > 3) |
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67 | G4cout << "Calling G4DNADingfelderChargeIncreaseModel::Initialise()" << G4endl; |
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68 | |
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69 | // Energy limits |
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70 | |
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71 | G4DNAGenericIonsManager *instance; |
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72 | instance = G4DNAGenericIonsManager::Instance(); |
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73 | G4ParticleDefinition* hydrogenDef = instance->GetIon("hydrogen"); |
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74 | G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+"); |
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75 | G4ParticleDefinition* heliumDef = instance->GetIon("helium"); |
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76 | |
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77 | G4String hydrogen; |
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78 | G4String alphaPlus; |
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79 | G4String helium; |
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80 | |
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81 | if (hydrogenDef != 0) |
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82 | { |
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83 | hydrogen = hydrogenDef->GetParticleName(); |
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84 | lowEnergyLimit[hydrogen] = 1. * keV; |
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85 | highEnergyLimit[hydrogen] = 10. * MeV; |
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86 | } |
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87 | else |
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88 | { |
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89 | G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: hydrogen is not defined"); |
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90 | } |
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91 | |
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92 | if (alphaPlusDef != 0) |
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93 | { |
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94 | alphaPlus = alphaPlusDef->GetParticleName(); |
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95 | lowEnergyLimit[alphaPlus] = 1. * keV; |
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96 | highEnergyLimit[alphaPlus] = 10. * MeV; |
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97 | } |
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98 | else |
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99 | { |
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100 | G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: alphaPlus is not defined"); |
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101 | } |
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102 | |
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103 | if (heliumDef != 0) |
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104 | { |
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105 | helium = heliumDef->GetParticleName(); |
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106 | lowEnergyLimit[helium] = 1. * keV; |
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107 | highEnergyLimit[helium] = 10. * MeV; |
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108 | } |
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109 | else |
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110 | { |
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111 | G4Exception("G4DNADingfelderChargeIncreaseModel::Initialise: helium is not defined"); |
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112 | } |
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113 | |
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114 | if (particle==hydrogenDef) |
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115 | { |
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116 | SetLowEnergyLimit(lowEnergyLimit[hydrogen]); |
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117 | SetHighEnergyLimit(highEnergyLimit[hydrogen]); |
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118 | } |
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119 | |
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120 | if (particle==alphaPlusDef) |
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121 | { |
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122 | SetLowEnergyLimit(lowEnergyLimit[alphaPlus]); |
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123 | SetHighEnergyLimit(highEnergyLimit[alphaPlus]); |
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124 | } |
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125 | |
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126 | if (particle==heliumDef) |
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127 | { |
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128 | SetLowEnergyLimit(lowEnergyLimit[helium]); |
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129 | SetHighEnergyLimit(highEnergyLimit[helium]); |
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130 | } |
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131 | |
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132 | // Final state |
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133 | |
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134 | //ALPHA+ |
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135 | |
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136 | f0[0][0]=1.; |
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137 | a0[0][0]=2.25; |
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138 | a1[0][0]=-0.75; |
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139 | b0[0][0]=-32.10; |
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140 | c0[0][0]=0.600; |
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141 | d0[0][0]=2.40; |
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142 | x0[0][0]=4.60; |
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143 | |
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144 | x1[0][0]=-1.; |
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145 | b1[0][0]=-1.; |
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146 | |
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147 | numberOfPartialCrossSections[0]=1; |
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148 | |
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149 | //HELIUM |
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150 | |
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151 | f0[0][1]=1.; |
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152 | a0[0][1]=2.25; |
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153 | a1[0][1]=-0.75; |
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154 | b0[0][1]=-30.93; |
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155 | c0[0][1]=0.590; |
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156 | d0[0][1]=2.35; |
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157 | x0[0][1]=4.29; |
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158 | |
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159 | f0[1][1]=1.; |
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160 | a0[1][1]=2.25; |
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161 | a1[1][1]=-0.75; |
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162 | b0[1][1]=-32.61; |
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163 | c0[1][1]=0.435; |
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164 | d0[1][1]=2.70; |
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165 | x0[1][1]=4.45; |
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166 | |
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167 | x1[0][1]=-1.; |
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168 | b1[0][1]=-1.; |
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169 | |
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170 | x1[1][1]=-1.; |
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171 | b1[1][1]=-1.; |
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172 | |
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173 | numberOfPartialCrossSections[1]=2; |
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174 | |
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175 | // |
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176 | |
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177 | G4cout << "Dingfelder charge increase model is initialized " << G4endl |
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178 | << "Energy range: " |
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179 | << LowEnergyLimit() / keV << " keV - " |
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180 | << HighEnergyLimit() / MeV << " MeV for " |
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181 | << particle->GetParticleName() |
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182 | << G4endl; |
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183 | |
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184 | if(!isInitialised) |
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185 | { |
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186 | isInitialised = true; |
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187 | |
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188 | if(pParticleChange) |
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189 | fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange); |
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190 | else |
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191 | fParticleChangeForGamma = new G4ParticleChangeForGamma(); |
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192 | } |
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193 | |
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194 | // InitialiseElementSelectors(particle,cuts); |
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195 | |
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196 | // Test if water material |
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197 | |
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198 | flagMaterialIsWater= false; |
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199 | densityWater = 0; |
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200 | |
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201 | const G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable(); |
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202 | |
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203 | if(theCoupleTable) |
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204 | { |
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205 | G4int numOfCouples = theCoupleTable->GetTableSize(); |
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206 | |
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207 | if(numOfCouples>0) |
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208 | { |
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209 | for (G4int i=0; i<numOfCouples; i++) |
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210 | { |
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211 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i); |
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212 | const G4Material* material = couple->GetMaterial(); |
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213 | |
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214 | size_t j = material->GetNumberOfElements(); |
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215 | while (j>0) |
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216 | { |
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217 | j--; |
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218 | const G4Element* element(material->GetElement(j)); |
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219 | if (element->GetZ() == 8.) |
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220 | { |
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221 | G4double density = material->GetAtomicNumDensityVector()[j]; |
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222 | if (density > 0.) |
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223 | { |
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224 | flagMaterialIsWater = true; |
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225 | densityWater = density; |
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226 | |
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227 | if (verboseLevel > 3) |
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228 | G4cout << "Water material is found with density(cm^-3)=" << density/(cm*cm*cm) << G4endl; |
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229 | } |
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230 | } |
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231 | } |
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232 | |
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233 | } |
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234 | } // if(numOfCouples>0) |
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235 | |
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236 | } // if (theCoupleTable) |
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237 | |
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238 | } |
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239 | |
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240 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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241 | |
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242 | G4double G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume(const G4Material*, |
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243 | const G4ParticleDefinition* particleDefinition, |
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244 | G4double k, |
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245 | G4double, |
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246 | G4double) |
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247 | { |
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248 | if (verboseLevel > 3) |
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249 | G4cout << "Calling CrossSectionPerVolume() of G4DNADingfelderChargeIncreaseModel" << G4endl; |
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250 | |
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251 | // Calculate total cross section for model |
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252 | |
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253 | G4DNAGenericIonsManager *instance; |
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254 | instance = G4DNAGenericIonsManager::Instance(); |
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255 | |
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256 | if ( |
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257 | particleDefinition != instance->GetIon("hydrogen") |
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258 | && |
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259 | particleDefinition != instance->GetIon("alpha+") |
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260 | && |
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261 | particleDefinition != instance->GetIon("helium") |
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262 | ) |
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263 | |
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264 | return 0; |
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265 | |
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266 | G4double lowLim = 0; |
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267 | G4double highLim = 0; |
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268 | G4double totalCrossSection = 0.; |
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269 | |
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270 | if (flagMaterialIsWater) |
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271 | { |
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272 | const G4String& particleName = particleDefinition->GetParticleName(); |
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273 | |
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274 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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275 | pos1 = lowEnergyLimit.find(particleName); |
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276 | |
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277 | if (pos1 != lowEnergyLimit.end()) |
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278 | { |
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279 | lowLim = pos1->second; |
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280 | } |
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281 | |
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282 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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283 | pos2 = highEnergyLimit.find(particleName); |
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284 | |
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285 | if (pos2 != highEnergyLimit.end()) |
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286 | { |
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287 | highLim = pos2->second; |
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288 | } |
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289 | |
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290 | if (k >= lowLim && k < highLim) |
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291 | { |
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292 | //HYDROGEN |
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293 | if (particleDefinition == instance->GetIon("hydrogen")) |
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294 | { |
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295 | const G4double aa = 2.835; |
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296 | const G4double bb = 0.310; |
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297 | const G4double cc = 2.100; |
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298 | const G4double dd = 0.760; |
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299 | const G4double fac = 1.0e-18; |
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300 | const G4double rr = 13.606 * eV; |
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301 | |
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302 | G4double t = k / (proton_mass_c2/electron_mass_c2); |
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303 | G4double x = t / rr; |
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304 | G4double temp = 4.0 * pi * Bohr_radius/nm * Bohr_radius/nm * fac; |
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305 | G4double sigmal = temp * cc * (std::pow(x,dd)); |
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306 | G4double sigmah = temp * (aa * std::log(1.0 + x) + bb) / x; |
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307 | totalCrossSection = 1.0/(1.0/sigmal + 1.0/sigmah) *m*m; |
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308 | } |
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309 | else |
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310 | { |
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311 | totalCrossSection = Sum(k,particleDefinition); |
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312 | } |
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313 | } |
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314 | |
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315 | if (verboseLevel > 3) |
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316 | { |
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317 | G4cout << "---> Kinetic energy(eV)=" << k/eV << G4endl; |
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318 | G4cout << " - Cross section per water molecule (cm^2)=" << totalCrossSection/cm/cm << G4endl; |
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319 | G4cout << " - Cross section per water molecule (cm^-1)=" << totalCrossSection*densityWater/(1./cm) << G4endl; |
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320 | } |
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321 | |
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322 | } // if (flagMaterialIsWater) |
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323 | |
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324 | return totalCrossSection*densityWater; |
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325 | |
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326 | } |
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327 | |
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328 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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329 | |
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330 | void G4DNADingfelderChargeIncreaseModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
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331 | const G4MaterialCutsCouple* /*couple*/, |
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332 | const G4DynamicParticle* aDynamicParticle, |
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333 | G4double, |
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334 | G4double) |
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335 | { |
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336 | if (verboseLevel > 3) |
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337 | G4cout << "Calling SampleSecondaries() of G4DNADingfelderChargeIncreaseModel" << G4endl; |
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338 | |
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339 | fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill); |
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340 | fParticleChangeForGamma->ProposeLocalEnergyDeposit(0.); |
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341 | |
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342 | G4ParticleDefinition* definition = aDynamicParticle->GetDefinition(); |
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343 | |
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344 | G4double inK = aDynamicParticle->GetKineticEnergy(); |
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345 | |
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346 | G4int finalStateIndex = RandomSelect(inK,definition); |
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347 | |
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348 | G4int n = NumberOfFinalStates(definition,finalStateIndex); |
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349 | |
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350 | G4double outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex); |
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351 | |
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352 | G4DNAGenericIonsManager* instance; |
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353 | instance = G4DNAGenericIonsManager::Instance(); |
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354 | |
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355 | G4double electronK; |
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356 | if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2; |
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357 | else electronK = inK*electron_mass_c2/(3728*MeV); |
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358 | |
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359 | if (outK<0) |
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360 | { |
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361 | G4String message; |
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362 | message="G4DNADingfelderChargeIncreaseModel::SampleSecondaries: final kinetic energy is below 0! Process "; |
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363 | } |
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364 | |
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365 | G4DynamicParticle* dp = new G4DynamicParticle |
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366 | |
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367 | (OutgoingParticleDefinition(definition,finalStateIndex), |
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368 | aDynamicParticle->GetMomentumDirection(), |
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369 | outK) ; |
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370 | |
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371 | fvect->push_back(dp); |
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372 | |
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373 | n = n - 1; |
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374 | |
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375 | while (n>0) |
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376 | { |
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377 | n--; |
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378 | fvect->push_back(new G4DynamicParticle |
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379 | (G4Electron::Electron(), aDynamicParticle->GetMomentumDirection(), electronK) ); |
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380 | } |
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381 | |
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382 | } |
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383 | |
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384 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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385 | |
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386 | G4int G4DNADingfelderChargeIncreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition, |
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387 | G4int finalStateIndex ) |
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388 | |
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389 | { |
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390 | G4DNAGenericIonsManager* instance; |
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391 | instance = G4DNAGenericIonsManager::Instance(); |
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392 | if (particleDefinition == instance->GetIon("hydrogen")) return 2; |
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393 | if (particleDefinition == instance->GetIon("alpha+")) return 2; |
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394 | |
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395 | if (particleDefinition == instance->GetIon("helium")) |
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396 | { if (finalStateIndex==0) return 2; |
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397 | return 3; |
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398 | } |
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399 | return 0; |
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400 | } |
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401 | |
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402 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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403 | |
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404 | G4ParticleDefinition* G4DNADingfelderChargeIncreaseModel::OutgoingParticleDefinition (G4ParticleDefinition* particleDefinition, |
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405 | G4int finalStateIndex) |
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406 | { |
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407 | G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance()); |
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408 | if (particleDefinition == instance->GetIon("hydrogen")) return G4Proton::Proton(); |
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409 | if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("alpha++"); |
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410 | |
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411 | if (particleDefinition == instance->GetIon("alpha+")) return instance->GetIon("helium"); |
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412 | { |
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413 | if (finalStateIndex==0) return instance->GetIon("alpha+"); |
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414 | return instance->GetIon("alpha++"); |
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415 | } |
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416 | return 0; |
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417 | } |
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418 | |
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419 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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420 | |
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421 | G4double G4DNADingfelderChargeIncreaseModel::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition, |
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422 | G4int finalStateIndex ) |
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423 | { |
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424 | G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance()); |
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425 | if(particleDefinition == instance->GetIon("hydrogen")) return 13.6*eV; |
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426 | |
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427 | if(particleDefinition == instance->GetIon("alpha+")) |
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428 | { |
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429 | // Binding energy for He+ -> He++ + e- 54.509 eV |
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430 | // Binding energy for He -> He+ + e- 24.587 eV |
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431 | return 54.509*eV; |
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432 | } |
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433 | |
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434 | if(particleDefinition == instance->GetIon("helium")) |
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435 | { |
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436 | // Binding energy for He+ -> He++ + e- 54.509 eV |
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437 | // Binding energy for He -> He+ + e- 24.587 eV |
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438 | |
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439 | if (finalStateIndex==0) return 24.587*eV; |
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440 | return (54.509 + 24.587)*eV; |
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441 | } |
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442 | |
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443 | return 0; |
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444 | } |
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445 | |
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446 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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447 | |
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448 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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449 | |
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450 | G4double G4DNADingfelderChargeIncreaseModel::PartialCrossSection(G4double k, G4int index, |
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451 | const G4ParticleDefinition* particleDefinition) |
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452 | { |
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453 | |
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454 | G4int particleTypeIndex = 0; |
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455 | G4DNAGenericIonsManager *instance; |
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456 | instance = G4DNAGenericIonsManager::Instance(); |
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457 | |
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458 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0; |
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459 | if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1; |
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460 | |
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461 | // |
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462 | // sigma(T) = f0 10 ^ y(log10(T/eV)) |
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463 | // |
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464 | // / a0 x + b0 x < x0 |
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465 | // | |
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466 | // y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1 |
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467 | // | |
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468 | // \ a1 x + b1 x >= x1 |
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469 | // |
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470 | // |
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471 | // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++) |
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472 | // |
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473 | // f0 has been added to the code in order to manage partial (shell-dependent) cross sections (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1) |
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474 | // |
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475 | // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al. |
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476 | // Inelastic-collision cross sections of liquid water for interactions of energetic proton |
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477 | // |
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478 | |
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479 | if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex]) |
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480 | { |
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481 | // |
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482 | // if x1 < x0 means that x1 and b1 will be calculated with the following formula (this piece of code is run on all alphas and not on protons) |
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483 | // |
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484 | // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1)) |
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485 | // |
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486 | // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0 |
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487 | // |
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488 | |
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489 | x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.)); |
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490 | b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex] + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex] - x0[index][particleTypeIndex], d0[index][particleTypeIndex]); |
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491 | } |
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492 | |
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493 | G4double x(std::log10(k/eV)); |
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494 | G4double y; |
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495 | |
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496 | if (x<x0[index][particleTypeIndex]) |
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497 | y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex]; |
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498 | else if (x<x1[index][particleTypeIndex]) |
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499 | y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]); |
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500 | else |
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501 | y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex]; |
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502 | |
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503 | return f0[index][particleTypeIndex] * std::pow(10., y)*m*m; |
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504 | |
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505 | } |
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506 | |
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507 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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508 | |
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509 | G4int G4DNADingfelderChargeIncreaseModel::RandomSelect(G4double k, |
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510 | const G4ParticleDefinition* particleDefinition) |
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511 | { |
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512 | |
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513 | G4int particleTypeIndex = 0; |
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514 | G4DNAGenericIonsManager *instance; |
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515 | instance = G4DNAGenericIonsManager::Instance(); |
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516 | |
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517 | if (particleDefinition == instance->GetIon("hydrogen")) return 0; |
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518 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0; |
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519 | if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1; |
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520 | |
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521 | const G4int n = numberOfPartialCrossSections[particleTypeIndex]; |
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522 | G4double* values(new G4double[n]); |
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523 | G4double value = 0; |
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524 | G4int i = n; |
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525 | |
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526 | while (i>0) |
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527 | { |
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528 | i--; |
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529 | values[i]=PartialCrossSection(k, i, particleDefinition); |
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530 | value+=values[i]; |
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531 | } |
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532 | |
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533 | value*=G4UniformRand(); |
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534 | |
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535 | i=n; |
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536 | while (i>0) |
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537 | { |
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538 | i--; |
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539 | |
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540 | if (values[i]>value) |
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541 | break; |
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542 | |
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543 | value-=values[i]; |
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544 | } |
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545 | |
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546 | delete[] values; |
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547 | |
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548 | return i; |
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549 | } |
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550 | |
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551 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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552 | |
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553 | G4double G4DNADingfelderChargeIncreaseModel::Sum(G4double k, const G4ParticleDefinition* particleDefinition) |
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554 | { |
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555 | G4int particleTypeIndex = 0; |
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556 | G4DNAGenericIonsManager *instance; |
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557 | instance = G4DNAGenericIonsManager::Instance(); |
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558 | |
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559 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=0; |
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560 | if (particleDefinition == instance->GetIon("helium")) particleTypeIndex=1; |
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561 | |
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562 | G4double totalCrossSection = 0.; |
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563 | |
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564 | for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++) |
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565 | { |
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566 | totalCrossSection += PartialCrossSection(k,i,particleDefinition); |
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567 | } |
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568 | return totalCrossSection; |
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569 | } |
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