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 | // $Id: G4hhIonisation.cc,v 1.10 2010/06/04 10:23:31 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
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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: G4hhIonisation |
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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: 30.09.2005 |
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39 | // |
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40 | // Modifications: |
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41 | // 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko) |
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42 | // 27-10-06 Add maxKinEnergy (V.Ivantchenko) |
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43 | // |
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44 | // |
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45 | // ------------------------------------------------------------------- |
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46 | // |
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47 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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48 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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49 | |
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50 | #include "G4hhIonisation.hh" |
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51 | #include "G4BraggNoDeltaModel.hh" |
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52 | #include "G4BetheBlochNoDeltaModel.hh" |
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53 | #include "G4ICRU73NoDeltaModel.hh" |
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54 | #include "G4UniversalFluctuation.hh" |
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55 | #include "G4BohrFluctuations.hh" |
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56 | #include "G4UnitsTable.hh" |
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57 | #include "G4Electron.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 | G4hhIonisation::G4hhIonisation(const G4String& name) |
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62 | : G4VEnergyLossProcess(name), |
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63 | theParticle(0), |
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64 | theBaseParticle(0), |
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65 | isInitialised(false) |
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66 | { |
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67 | SetStepFunction(0.1, 0.1*mm); |
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68 | SetVerboseLevel(1); |
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69 | SetProcessSubType(fIonisation); |
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70 | mass = 0.0; |
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71 | ratio = 0.0; |
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72 | } |
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73 | |
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74 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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75 | |
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76 | G4hhIonisation::~G4hhIonisation() |
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77 | {} |
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78 | |
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79 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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80 | |
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81 | G4bool G4hhIonisation::IsApplicable(const G4ParticleDefinition& p) |
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82 | { |
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83 | return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 100.0*MeV && |
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84 | !p.IsShortLived()); |
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85 | } |
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86 | |
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87 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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88 | |
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89 | G4double G4hhIonisation::MinPrimaryEnergy(const G4ParticleDefinition*, |
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90 | const G4Material*, |
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91 | G4double cut) |
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92 | { |
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93 | G4double x = 0.5*cut/electron_mass_c2; |
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94 | G4double y = electron_mass_c2/mass; |
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95 | G4double g = x*y + std::sqrt((1. + x)*(1. + x*y*y)); |
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96 | return mass*(g - 1.0); |
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97 | } |
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98 | |
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99 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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100 | |
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101 | void G4hhIonisation::InitialiseEnergyLossProcess(const G4ParticleDefinition* part, |
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102 | const G4ParticleDefinition* bpart) |
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103 | { |
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104 | if(isInitialised) return; |
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105 | |
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106 | theParticle = part; |
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107 | if(bpart) G4cout << "G4hhIonisation::InitialiseEnergyLossProcess WARNING: no " |
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108 | << "base particle should be defined for the process " |
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109 | << GetProcessName() << G4endl; |
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110 | |
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111 | SetBaseParticle(0); |
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112 | SetSecondaryParticle(G4Electron::Electron()); |
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113 | //G4double q = theParticle->GetPDGCharge(); |
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114 | mass = theParticle->GetPDGMass(); |
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115 | ratio = electron_mass_c2/mass; |
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116 | eth = 2.0*MeV*mass/proton_mass_c2; |
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117 | flucModel = new G4BohrFluctuations(); |
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118 | |
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119 | G4int nm = 1; |
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120 | |
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121 | minKinEnergy = MinKinEnergy(); |
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122 | |
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123 | if(eth > minKinEnergy) { |
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124 | G4VEmModel* em; |
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125 | em = new G4BraggNoDeltaModel(); |
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126 | //if(q > 0.0) { em = new G4BraggNoDeltaModel(); } |
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127 | //else { em = new G4ICRU73NoDeltaModel(); } |
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128 | em->SetLowEnergyLimit(minKinEnergy); |
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129 | em->SetHighEnergyLimit(eth); |
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130 | AddEmModel(nm, em, flucModel); |
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131 | ++nm; |
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132 | } |
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133 | |
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134 | if(eth < MaxKinEnergy()) { |
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135 | G4VEmModel* em1 = new G4BetheBlochNoDeltaModel(); |
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136 | em1->SetLowEnergyLimit(std::max(eth,minKinEnergy)); |
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137 | em1->SetHighEnergyLimit(MaxKinEnergy()); |
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138 | AddEmModel(nm, em1, flucModel); |
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139 | } |
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140 | |
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141 | if(verboseLevel>1) { |
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142 | G4cout << "G4hhIonisation is initialised: Nmodels= " << nm << G4endl; |
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143 | } |
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144 | isInitialised = true; |
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145 | } |
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146 | |
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147 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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148 | |
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149 | void G4hhIonisation::PrintInfo() |
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150 | { |
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151 | G4cout << " Delta-ray will not be produced; " |
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152 | << G4endl; |
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153 | } |
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154 | |
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155 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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