1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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9 | // * include a list of copyright holders. * |
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11 | // * Neither the authors of this software system, nor their employing * |
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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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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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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 | // $Id: G4alphaIonisation.cc,v 1.1 2009/11/10 11:50:30 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // GEANT4 Class file |
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32 | // |
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33 | // |
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34 | // File name: G4alphaIonisation |
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35 | // |
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36 | // Author: Vladimir Ivanchenko |
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37 | // |
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38 | // Creation date: 28.10.2009 created from G4ionIonisation |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // |
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43 | // |
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44 | // ------------------------------------------------------------------- |
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45 | // |
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46 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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47 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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48 | |
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49 | #include "G4alphaIonisation.hh" |
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50 | #include "G4Electron.hh" |
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51 | #include "G4Alpha.hh" |
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52 | #include "G4BraggIonModel.hh" |
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53 | #include "G4BetheBlochModel.hh" |
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54 | #include "G4UnitsTable.hh" |
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55 | #include "G4LossTableManager.hh" |
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56 | #include "G4IonFluctuations.hh" |
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57 | #include "G4UniversalFluctuation.hh" |
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58 | |
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59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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60 | |
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61 | using namespace std; |
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62 | |
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63 | G4alphaIonisation::G4alphaIonisation(const G4String& name) |
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64 | : G4VEnergyLossProcess(name), |
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65 | theParticle(0), |
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66 | isInitialised(false), |
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67 | nuclearStopping(true) |
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68 | { |
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69 | // SetLinearLossLimit(0.15); |
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70 | SetStepFunction(0.2, 0.1*mm); |
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71 | // SetIntegral(true); |
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72 | SetProcessSubType(fIonisation); |
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73 | // SetVerboseLevel(1); |
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74 | mass = 0.0; |
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75 | ratio = 0.0; |
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76 | } |
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77 | |
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78 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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79 | |
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80 | G4alphaIonisation::~G4alphaIonisation() |
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81 | {} |
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82 | |
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83 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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84 | |
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85 | G4bool G4alphaIonisation::IsApplicable(const G4ParticleDefinition& p) |
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86 | { |
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87 | return (p.GetPDGCharge() == 2*eplus); |
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88 | } |
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89 | |
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90 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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91 | |
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92 | G4double G4alphaIonisation::MinPrimaryEnergy(const G4ParticleDefinition*, |
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93 | const G4Material*, |
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94 | G4double cut) |
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95 | { |
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96 | G4double x = 0.5*cut/electron_mass_c2; |
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97 | G4double g = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio)); |
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98 | return mass*(g - 1.0); |
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99 | } |
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100 | |
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101 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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102 | |
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103 | void G4alphaIonisation::InitialiseEnergyLossProcess( |
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104 | const G4ParticleDefinition* part, |
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105 | const G4ParticleDefinition* bpart) |
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106 | { |
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107 | if(!isInitialised) { |
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108 | |
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109 | theParticle = part; |
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110 | G4String pname = part->GetParticleName(); |
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111 | |
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112 | // define base particle |
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113 | const G4ParticleDefinition* theBaseParticle = 0; |
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114 | if(bpart == 0) { |
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115 | if(pname != "alpha") { theBaseParticle = G4Alpha::Alpha(); } |
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116 | } else { theBaseParticle = bpart; } |
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117 | |
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118 | mass = part->GetPDGMass(); |
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119 | ratio = electron_mass_c2/mass; |
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120 | |
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121 | SetBaseParticle(theBaseParticle); |
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122 | SetSecondaryParticle(G4Electron::Electron()); |
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123 | |
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124 | if (!EmModel(1)) SetEmModel(new G4BraggIonModel(), 1); |
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125 | EmModel(1)->SetLowEnergyLimit(MinKinEnergy()); |
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126 | |
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127 | // model limit defined for alpha |
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128 | eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2; |
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129 | EmModel(1)->SetHighEnergyLimit(eth); |
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130 | |
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131 | if (!FluctModel()) SetFluctModel(new G4UniversalFluctuation()); |
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132 | AddEmModel(1, EmModel(1), new G4IonFluctuations()); |
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133 | |
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134 | if (!EmModel(2)) SetEmModel(new G4BetheBlochModel(),2); |
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135 | EmModel(2)->SetLowEnergyLimit(eth); |
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136 | EmModel(2)->SetHighEnergyLimit(MaxKinEnergy()); |
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137 | AddEmModel(2, EmModel(2), FluctModel()); |
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138 | |
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139 | isInitialised = true; |
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140 | } |
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141 | // reinitialisation of corrections for the new run |
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142 | EmModel(1)->ActivateNuclearStopping(nuclearStopping); |
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143 | EmModel(2)->ActivateNuclearStopping(nuclearStopping); |
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144 | } |
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145 | |
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146 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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147 | |
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148 | void G4alphaIonisation::PrintInfo() |
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149 | { |
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150 | if (G4Alpha::Alpha() == theParticle) { |
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151 | if(EmModel(1) && EmModel(2)) { |
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152 | G4cout << " NuclearStopping= " << nuclearStopping |
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153 | << G4endl; |
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154 | } |
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155 | } |
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156 | } |
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157 | |
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158 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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