Gabriele Cosmo
151 lines
5.0 KiB
C++
151 lines
5.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 - Brachytherapy example
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// --------------------------------------------------------------
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//
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// Code developed by:
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// S.Guatelli
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//
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// ********************************************
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// * *
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// * BrachyPrimaryGeneratorActionI.cc *
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// * *
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// ********************************************
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//
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// $Id: BrachyPrimaryGeneratorActionI.cc,v 1.10 2006/06/29 15:48:48 gunter Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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//
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#include "BrachyPrimaryGeneratorActionI.hh"
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#ifdef G4ANALYSIS_USE
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#include "BrachyAnalysisManager.hh"
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#endif
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#include "globals.hh"
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#include "G4ParticleTable.hh"
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#include "Randomize.hh"
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#include "G4Event.hh"
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#include "G4ParticleGun.hh"
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//#include "G4IonTable.hh"
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#include "G4UImanager.hh"
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#include "G4RunManager.hh"
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BrachyPrimaryGeneratorActionI::BrachyPrimaryGeneratorActionI()
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{
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G4int numberParticles = 1;
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particleGun = new G4ParticleGun(numberParticles);
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// Gamma energy spectrum ...
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// Fill a vector with the energy probabilities
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energySpectrum.push_back(0.783913);
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energySpectrum.push_back(0.170416);
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energySpectrum.push_back(0.045671);
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}
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BrachyPrimaryGeneratorActionI::~BrachyPrimaryGeneratorActionI()
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{
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if(particleGun)
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delete particleGun;
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}
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void BrachyPrimaryGeneratorActionI::GeneratePrimaries(G4Event* anEvent)
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{
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#ifdef G4ANALYSIS_USE
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BrachyAnalysisManager* analysis = BrachyAnalysisManager::getInstance();
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#endif
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// Define the primary particle type
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G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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G4String ParticleName = "gamma";
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G4ParticleDefinition* particle = particleTable -> FindParticle(ParticleName);
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particleGun -> SetParticleDefinition(particle);
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// Random generation of gamma source point inside the Iodium core ...
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G4double x,y,z;
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G4double radiuMax = 0.30*mm;
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G4double radiusMin = 0.085*mm;
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do{
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x = (G4UniformRand()-0.5)*(radiuMax)/0.5;
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y = (G4UniformRand()-0.5)*(radiuMax)/0.5;
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}while(((x*x+y*y )> (radiuMax*radiuMax))||((x*x+y*y)<(radiusMin*radiusMin)));
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z = (G4UniformRand()-0.5)*1.75*mm/0.5 ;
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G4ThreeVector position(x,y,z);
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particleGun -> SetParticlePosition(position);
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// Random generation of the impulse direction of primary particles ...
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G4double a,b,c;
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G4double n;
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do{
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a = (G4UniformRand()-0.5)/0.5;
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b = (G4UniformRand()-0.5)/0.5;
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c = (G4UniformRand()-0.5)/0.5;
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n = a*a+b*b+c*c;
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}while(n > 1 || n == 0.0);
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n = std::sqrt(n);
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a /= n;
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b /= n;
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c /= n;
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G4ThreeVector direction(a,b,c);
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particleGun -> SetParticleMomentumDirection(direction);
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// Generate the primary particles with a defined energy spectrum
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G4double random = G4UniformRand();
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G4double sum = 0;
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G4int i = 0;
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while(sum<random){sum+=energySpectrum[i];
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i++;}
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// energy spectrum
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if(i==1){primaryParticleEnergy = 27.4*keV;}
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else{
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if(i==2){primaryParticleEnergy = 31.4*keV;}
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else {primaryParticleEnergy = 35.5*keV;}}
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particleGun -> SetParticleEnergy(primaryParticleEnergy);
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// Fill 1D histogram with gamma energy spectrum ...
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#ifdef G4ANALYSIS_USE
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analysis -> PrimaryParticleEnergySpectrum(primaryParticleEnergy);
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#endif
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// generate primary particle
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particleGun->GeneratePrimaryVertex(anEvent);
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}
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G4double BrachyPrimaryGeneratorActionI::GetEnergy()
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{
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return primaryParticleEnergy;
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}
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