brachytherapy/src/BrachyPrimaryGeneratorAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0024 // ********************************************************************
0025 //
0026 //
0027 // --------------------------------------------------------------
0028 //                 GEANT 4 - Brachytherapy example
0029 // --------------------------------------------------------------
0030 //
0031 // Code developed by:
0032 // S.Guatelli
0033 //
0034 //    ********************************************
0035 //    *                                          *
0036 //    *    BrachyPrimaryGeneratorAction.cc       *
0037 //    *                                          *
0038 //    ********************************************
0039 //
0040 //
0041
0042 #include "globals.hh"
0043
0044 #include "BrachyPrimaryGeneratorAction.hh"
0045 #include "Randomize.hh"
0046 #include "G4AnalysisManager.hh"
0047 #include "G4Event.hh"
0048 #include "G4GeneralParticleSource.hh"
0049 #include "G4RunManager.hh"
0050 #include "G4SystemOfUnits.hh"
0051
0052 BrachyPrimaryGeneratorAction::BrachyPrimaryGeneratorAction()
0053 {
0054 // Use the GPS to generate primary particles,
0055 // Particle type, energy position, direction are specified in
0056 // macro files
0057  fGun = new G4GeneralParticleSource();
0058 }
0059
0060 BrachyPrimaryGeneratorAction::~BrachyPrimaryGeneratorAction()
0061 {
0062 delete fGun;
0063 }
0064
0065 void BrachyPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0066 {
0067  fGun -> GeneratePrimaryVertex(anEvent);
0068
0069  if (fGun -> GetParticleDefinition()-> GetParticleName()== "gamma")
0070  {
0071   auto analysisManager = G4AnalysisManager::Instance();
0072   G4double energy = fGun -> GetParticleEnergy();
0073   // Fill histogram with the energy spectrum of
0074   // the photons emitted by the radionuclide
0075   // when modelling the photons as primary particles (not via radioactive decay)
0076    analysisManager -> FillH1(0, energy/keV);
0077  }
0078 }
0079
0080