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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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 | // ------------------------------------------------------------------- |
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28 | // |
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29 | // GEANT4 Class file |
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30 | // |
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31 | // |
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32 | // File name: G4IonChuFluctuationModel |
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33 | // |
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34 | // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch) |
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35 | // |
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36 | // Creation date: 18 August 2000 |
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37 | // |
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38 | // Modifications: |
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39 | // 18/08/2000 V.Ivanchenko First implementation |
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40 | // 04/09/2000 V.Ivanchenko Rename fluctuations |
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41 | // 03/10/2000 V.Ivanchenko CodeWizard clean up |
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42 | // 10/05/2001 V.Ivanchenko Clean up againist Linux compilation with -Wall |
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43 | // |
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44 | // ------------------------------------------------------------------- |
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45 | // |
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46 | // Class Description: |
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47 | // |
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48 | // The aproximation of additional ion energy loss fluctuations |
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49 | // W.K.Chu, In: Ion Beam Handbook for Material Analysis. |
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50 | // eds. J.W. Mayer and E. Rimini (Academic Press, New York, 1977). |
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51 | // Q.Yang et al., NIM B61(1991)149-155. |
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52 | // |
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53 | // Class Description: End |
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54 | // |
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55 | // ------------------------------------------------------------------- |
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56 | // |
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57 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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58 | |
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59 | #include "G4IonChuFluctuationModel.hh" |
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60 | #include "G4DynamicParticle.hh" |
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61 | #include "G4ParticleDefinition.hh" |
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62 | #include "G4Material.hh" |
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63 | #include "globals.hh" |
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64 | |
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65 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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66 | |
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67 | G4IonChuFluctuationModel::G4IonChuFluctuationModel(const G4String& name) |
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68 | : G4VLowEnergyModel(name) |
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69 | {;} |
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70 | |
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71 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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72 | |
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73 | G4IonChuFluctuationModel::~G4IonChuFluctuationModel() |
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74 | {;} |
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75 | |
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76 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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77 | |
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78 | G4double G4IonChuFluctuationModel::TheValue(const G4DynamicParticle* particle, |
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79 | const G4Material* material) |
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80 | { |
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81 | G4double energy = particle->GetKineticEnergy() ; |
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82 | G4double particleMass = particle->GetMass() ; |
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83 | |
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84 | G4double q = ChuFluctuationModel(material,energy,particleMass) ; |
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85 | |
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86 | return q ; |
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87 | } |
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88 | |
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89 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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90 | |
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91 | G4double G4IonChuFluctuationModel::TheValue( |
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92 | const G4ParticleDefinition* aParticle, |
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93 | const G4Material* material, |
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94 | G4double kineticEnergy) |
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95 | { |
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96 | G4double particleMass = aParticle->GetPDGMass() ; |
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97 | |
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98 | G4double q = ChuFluctuationModel(material,kineticEnergy,particleMass); |
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99 | |
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100 | return q ; |
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101 | } |
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102 | |
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103 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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104 | |
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105 | G4double G4IonChuFluctuationModel::HighEnergyLimit(const G4ParticleDefinition*, |
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106 | const G4Material* ) const |
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107 | { |
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108 | return 1.0*TeV ; |
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109 | } |
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110 | |
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111 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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112 | |
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113 | G4double G4IonChuFluctuationModel::LowEnergyLimit(const G4ParticleDefinition*, |
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114 | const G4Material*) const |
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115 | { |
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116 | return 0.0 ; |
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117 | } |
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118 | |
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119 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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120 | |
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121 | G4double G4IonChuFluctuationModel::HighEnergyLimit(const G4ParticleDefinition*) const |
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122 | { |
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123 | return 1.0*TeV ; |
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124 | } |
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125 | |
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126 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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127 | |
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128 | G4double G4IonChuFluctuationModel::LowEnergyLimit(const G4ParticleDefinition*) const |
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129 | { |
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130 | return 0.0 ; |
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131 | } |
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132 | |
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133 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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134 | |
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135 | G4bool G4IonChuFluctuationModel::IsInCharge(const G4DynamicParticle*, |
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136 | const G4Material*) const |
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137 | { |
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138 | return true ; |
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139 | } |
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140 | |
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141 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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142 | |
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143 | G4bool G4IonChuFluctuationModel::IsInCharge(const G4ParticleDefinition*, |
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144 | const G4Material*) const |
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145 | { |
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146 | return true ; |
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147 | } |
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148 | |
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149 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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150 | |
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151 | G4double G4IonChuFluctuationModel::ChuFluctuationModel(const G4Material* material, |
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152 | G4double kineticEnergy, |
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153 | G4double particleMass) const |
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154 | { |
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155 | // The aproximation of energy loss fluctuations |
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156 | // Q.Yang et al., NIM B61(1991)149-155. |
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157 | |
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158 | // Reduced energy in MeV/AMU |
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159 | G4double energy = kineticEnergy * amu_c2/(particleMass*MeV) ; |
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160 | |
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161 | G4double zeff = (material->GetElectronDensity())/ |
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162 | (material->GetTotNbOfAtomsPerVolume()) ; |
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163 | |
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164 | static G4double a[96][4] = { |
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165 | {-0.3291, -0.8312, 0.2460, -1.0220}, |
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166 | {-0.5615, -0.5898, 0.5205, -0.7258}, |
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167 | {-0.5280, -0.4981, 0.5519, -0.5865}, |
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168 | {-0.5125, -0.4625, 0.5660, -0.5190}, |
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169 | {-0.5127, -0.8595, 0.5626, -0.8721}, |
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170 | {-0.5174, -1.1930, 0.5565, -1.1980}, |
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171 | {-0.5179, -1.1850, 0.5560, -1.2070}, |
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172 | {-0.5209, -0.9355, 0.5590, -1.0250}, |
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173 | {-0.5255, -0.7766, 0.5720, -0.9412}, |
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174 | |
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175 | {-0.5776, -0.6665, 0.6598, -0.8484}, |
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176 | {-0.6013, -0.6045, 0.7321, -0.7671}, |
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177 | {-0.5781, -0.5518, 0.7605, -0.6919}, |
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178 | {-0.5587, -0.4981, 0.7835, -0.6195}, |
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179 | {-0.5466, -0.4656, 0.7978, -0.5771}, |
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180 | {-0.5406, -0.4690, 0.8031, -0.5718}, |
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181 | {-0.5391, -0.5061, 0.8024, -0.5974}, |
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182 | {-0.5380, -0.6483, 0.7962, -0.6970}, |
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183 | {-0.5355, -0.7722, 0.7962, -0.7839}, |
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184 | {-0.5329, -0.7720, 0.7988, -0.7846}, |
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185 | |
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186 | {-0.5335, -0.7671, 0.7984, -0.7933}, |
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187 | {-0.5324, -0.7612, 0.7998, -0.8031}, |
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188 | {-0.5305, -0.7300, 0.8031, -0.7990}, |
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189 | {-0.5307, -0.7178, 0.8049, -0.8216}, |
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190 | {-0.5248, -0.6621, 0.8165, -0.7919}, |
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191 | {-0.5180, -0.6502, 0.8266, -0.7986}, |
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192 | {-0.5084, -0.6408, 0.8396, -0.8048}, |
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193 | {-0.4967, -0.6331, 0.8549, -0.8093}, |
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194 | {-0.4861, -0.6508, 0.8712, -0.8432}, |
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195 | {-0.4700, -0.6186, 0.8961, -0.8132}, |
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196 | |
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197 | {-0.4545, -0.5720, 0.9227, -0.7710}, |
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198 | {-0.4404, -0.5226, 0.9481, -0.7254}, |
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199 | {-0.4288, -0.4778, 0.9701, -0.6850}, |
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200 | {-0.4199, -0.4425, 0.9874, -0.6539}, |
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201 | {-0.4131, -0.4188, 0.9998, -0.6332}, |
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202 | {-0.4089, -0.4057, 1.0070, -0.6218}, |
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203 | {-0.4039, -0.3913, 1.0150, -0.6107}, |
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204 | {-0.3987, -0.3698, 1.0240, -0.5938}, |
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205 | {-0.3977, -0.3608, 1.0260, -0.5852}, |
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206 | {-0.3972, -0.3600, 1.0260, -0.5842}, |
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207 | |
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208 | {-0.3985, -0.3803, 1.0200, -0.6013}, |
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209 | {-0.3985, -0.3979, 1.0150, -0.6168}, |
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210 | {-0.3968, -0.3990, 1.0160, -0.6195}, |
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211 | {-0.3971, -0.4432, 1.0050, -0.6591}, |
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212 | {-0.3944, -0.4665, 1.0010, -0.6825}, |
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213 | {-0.3924, -0.5109, 0.9921, -0.7235}, |
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214 | {-0.3882, -0.5158, 0.9947, -0.7343}, |
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215 | {-0.3838, -0.5125, 0.9999, -0.7370}, |
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216 | {-0.3786, -0.4976, 1.0090, -0.7310}, |
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217 | {-0.3741, -0.4738, 1.0200, -0.7155}, |
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218 | |
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219 | {-0.3969, -0.4496, 1.0320, -0.6982}, |
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220 | {-0.3663, -0.4297, 1.0430, -0.6828}, |
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221 | {-0.3630, -0.4120, 1.0530, -0.6689}, |
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222 | {-0.3597, -0.3964, 1.0620, -0.6564}, |
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223 | {-0.3555, -0.3809, 1.0720, -0.6454}, |
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224 | {-0.3525, -0.3607, 1.0820, -0.6289}, |
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225 | {-0.3505, -0.3465, 1.0900, -0.6171}, |
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226 | {-0.3397, -0.3570, 1.1020, -0.6384}, |
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227 | {-0.3314, -0.3552, 1.1130, -0.6441}, |
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228 | {-0.3235, -0.3531, 1.1230, -0.6498}, |
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229 | |
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230 | {-0.3150, -0.3483, 1.1360, -0.6539}, |
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231 | {-0.3060, -0.3441, 1.1490, -0.6593}, |
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232 | {-0.2968, -0.3396, 1.1630, -0.6649}, |
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233 | {-0.2935, -0.3225, 1.1760, -0.6527}, |
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234 | {-0.2797, -0.3262, 1.1940, -0.6722}, |
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235 | {-0.2704, -0.3202, 1.2100, -0.6770}, |
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236 | {-0.2815, -0.3227, 1.2480, -0.6775}, |
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237 | {-0.2880, -0.3245, 1.2810, -0.6801}, |
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238 | {-0.3034, -0.3263, 1.3270, -0.6778}, |
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239 | {-0.2936, -0.3215, 1.3430, -0.6835}, |
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240 | |
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241 | {-0.3282, -0.3200, 1.3980, -0.6650}, |
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242 | {-0.3260, -0.3070, 1.4090, -0.6552}, |
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243 | {-0.3511, -0.3074, 1.4470, -0.6442}, |
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244 | {-0.3501, -0.3064, 1.4500, -0.6442}, |
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245 | {-0.3490, -0.3027, 1.4550, -0.6418}, |
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246 | {-0.3487, -0.3048, 1.4570, -0.6447}, |
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247 | {-0.3478, -0.3074, 1.4600, -0.6483}, |
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248 | {-0.3501, -0.3283, 1.4540, -0.6669}, |
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249 | {-0.3494, -0.3373, 1.4550, -0.6765}, |
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250 | {-0.3485, -0.3373, 1.4570, -0.6774}, |
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251 | |
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252 | {-0.3462, -0.3300, 1.4630, -0.6728}, |
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253 | {-0.3462, -0.3225, 1.4690, -0.6662}, |
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254 | {-0.3453, -0.3094, 1.4790, -0.6553}, |
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255 | {-0.3844, -0.3134, 1.5240, -0.6412}, |
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256 | {-0.3848, -0.3018, 1.5310, -0.6303}, |
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257 | {-0.3862, -0.2955, 1.5360, -0.6237}, |
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258 | {-0.4262, -0.2991, 1.5860, -0.6115}, |
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259 | {-0.4278, -0.2910, 1.5900, -0.6029}, |
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260 | {-0.4303, -0.2817, 1.5940, -0.5927}, |
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261 | {-0.4315, -0.2719, 1.6010, -0.5829}, |
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262 | |
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263 | {-0.4359, -0.2914, 1.6050, -0.6010}, |
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264 | {-0.4365, -0.2982, 1.6080, -0.6080}, |
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265 | {-0.4253, -0.3037, 1.6120, -0.6150}, |
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266 | {-0.4335, -0.3245, 1.6160, -0.6377}, |
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267 | {-0.4307, -0.3292, 1.6210, -0.6447}, |
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268 | {-0.4284, -0.3204, 1.6290, -0.6380}, |
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269 | {-0.4227, -0.3217, 1.6360, -0.6438} |
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270 | } ; |
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271 | |
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272 | G4int iz = (G4int)zeff - 2 ; |
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273 | if( 0 > iz ) iz = 0 ; |
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274 | if(95 < iz ) iz = 95 ; |
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275 | |
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276 | G4double q = 1.0 / (1.0 + a[iz][0]*std::pow(energy,a[iz][1])+ |
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277 | + a[iz][2]*std::pow(energy,a[iz][3])) ; |
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278 | |
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279 | return q ; |
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280 | } |
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281 | |
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282 | |
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