1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // -------------------------------------------------------------- |
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28 | // GEANT 4 - Brachytherapy example |
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29 | // -------------------------------------------------------------- |
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30 | // |
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31 | // Code developed by: S.Guatelli |
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32 | // |
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33 | // ******************************************** |
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34 | // * * |
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35 | // * BrachyPrimaryGeneratorActionI.cc * |
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36 | // * * |
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37 | // ******************************************** |
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38 | // |
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39 | // $Id: BrachyPrimaryGeneratorActionI.cc,v 1.4 2006/06/29 17:33:34 gunter Exp $ |
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40 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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41 | // |
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42 | #include "BrachyPrimaryGeneratorActionI.hh" |
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43 | |
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44 | #ifdef G4ANALYSIS_USE |
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45 | #include "BrachyAnalysisManager.hh" |
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46 | #endif |
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47 | |
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48 | #include "globals.hh" |
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49 | #include "G4ParticleTable.hh" |
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50 | #include "Randomize.hh" |
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51 | #include "G4Event.hh" |
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52 | #include "G4ParticleGun.hh" |
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53 | #include "G4IonTable.hh" |
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54 | #include "G4UImanager.hh" |
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55 | #include "G4RunManager.hh" |
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56 | |
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57 | BrachyPrimaryGeneratorActionI::BrachyPrimaryGeneratorActionI() |
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58 | { |
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59 | G4int numberParticles = 1; |
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60 | |
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61 | particleGun = new G4ParticleGun(numberParticles); |
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62 | |
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63 | // Gamma energy spectrum ... |
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64 | energySpectrum.push_back(0.783913); |
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65 | energySpectrum.push_back(0.170416); |
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66 | energySpectrum.push_back(0.045671); |
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67 | } |
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68 | |
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69 | BrachyPrimaryGeneratorActionI::~BrachyPrimaryGeneratorActionI() |
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70 | { |
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71 | if(particleGun) |
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72 | delete particleGun; |
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73 | } |
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74 | |
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75 | void BrachyPrimaryGeneratorActionI::GeneratePrimaries(G4Event* anEvent) |
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76 | { |
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77 | #ifdef G4ANALYSIS_USE |
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78 | BrachyAnalysisManager* analysis = BrachyAnalysisManager::getInstance(); |
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79 | #endif |
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80 | |
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81 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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82 | G4String ParticleName = "gamma"; |
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83 | G4ParticleDefinition* particle = particleTable -> FindParticle(ParticleName); |
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84 | |
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85 | particleGun->SetParticleDefinition(particle); |
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86 | |
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87 | // Random generation of gamma source point inside the Iodium core ... |
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88 | G4double x,y,z; |
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89 | G4double radiuMax = 0.30*mm; |
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90 | G4double radiusMin = 0.085*mm; |
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91 | |
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92 | do{ |
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93 | x = (G4UniformRand()-0.5)*(radiuMax)/0.5; |
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94 | y = (G4UniformRand()-0.5)*(radiuMax)/0.5; |
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95 | }while(((x*x+y*y )> (radiuMax*radiuMax))||((x*x+y*y)<(radiusMin*radiusMin))); |
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96 | |
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97 | z = (G4UniformRand()-0.5)*1.75*mm/0.5 ; |
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98 | |
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99 | G4ThreeVector position(x,y,z); |
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100 | particleGun -> SetParticlePosition(position); |
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101 | |
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102 | // Random generation of the impulse direction of primary particles ... |
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103 | G4double a,b,c; |
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104 | G4double n; |
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105 | do{ |
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106 | a = (G4UniformRand()-0.5)/0.5; |
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107 | b = (G4UniformRand()-0.5)/0.5; |
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108 | c = (G4UniformRand()-0.5)/0.5; |
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109 | n = a*a+b*b+c*c; |
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110 | }while(n > 1 || n == 0.0); |
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111 | n = std::sqrt(n); |
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112 | a /= n; |
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113 | b /= n; |
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114 | c /= n; |
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115 | |
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116 | G4ThreeVector direction(a,b,c); |
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117 | particleGun -> SetParticleMomentumDirection(direction); |
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118 | |
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119 | G4double random = G4UniformRand(); |
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120 | G4double sum = 0; |
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121 | G4int i = 0; |
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122 | while(sum<random){sum+=energySpectrum[i]; |
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123 | i++;} |
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124 | |
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125 | // energy spectrum |
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126 | if(i==1){primaryParticleEnergy = 27.4*keV;} |
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127 | else{ |
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128 | if(i==2){primaryParticleEnergy = 31.4*keV;} |
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129 | else {primaryParticleEnergy = 35.5*keV;} |
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130 | } |
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131 | |
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132 | particleGun -> SetParticleEnergy(primaryParticleEnergy); |
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133 | |
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134 | // Fill 1D histogram with gamma energy spectrum ... |
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135 | #ifdef G4ANALYSIS_USE |
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136 | analysis -> PrimaryParticleEnergySpectrum(primaryParticleEnergy); |
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137 | #endif |
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138 | |
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139 | // generate primary particle |
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140 | particleGun -> GeneratePrimaryVertex(anEvent); |
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141 | } |
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142 | |
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143 | G4double BrachyPrimaryGeneratorActionI::GetEnergy() |
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144 | { |
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145 | return primaryParticleEnergy; |
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146 | } |
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147 | |
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