[807] | 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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[1230] | 40 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[807] | 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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