#mt01primarygeneratoraction.cc#

利用linux环境下蒙特卡罗计算工具geant4实现伽玛射线与探测器乘积能量的模拟过程

//
// ********************************************************************
// * DISCLAIMER                                                       *
// *                                                                  *
// * The following disclaimer summarizes all the specific disclaimers *
// * of contributors to this software. The specific disclaimers,which *
// * govern, are listed with their locations in:                      *
// *   http://cern.ch/geant4/license                                  *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.                                                             *
// *                                                                  *
// * This  code  implementation is the  intellectual property  of the *
// * GEANT4 collaboration.                                            *
// * By copying,  distributing  or modifying the Program (or any work *
// * based  on  the Program)  you indicate  your  acceptance of  this *
// * statement, and all its terms.                                    *
// ********************************************************************
//
//
// $Id: ExN01PrimaryGeneratorAction.cc,v 1.5 2002/05/14 01:50:31 asaim Exp $
// GEANT4 tag $Name: geant4-07-00-patch-01 $
//

#include "mt01PrimaryGeneratorAction.hh"

#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
   
#include "globals.hh"

mt01PrimaryGeneratorAction::mt01PrimaryGeneratorAction()
{
  G4int n_particle = 1;
  particleGun = new G4ParticleGun(n_particle);
 
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4String particleName;
 
  particleGun->SetParticleDefinition(particleTable->FindParticle(particleName="gamma"));
  particleGun->SetParticleEnergy(10.*MeV);
  particleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, 0.0));
}

mt01PrimaryGeneratorAction::~mt01PrimaryGeneratorAction()
{
  delete particleGun;
}

void mt01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
   G4int i = anEvent->GetEventID() % 100000000;
  G4ThreeVector v(0.0,0.0,-1);
  switch(i)
{
 case 0:
  particleGun->SetParticleEnergy(112.*keV);
  break;
 case 100000:
  particleGun->SetParticleEnergy(200.*keV);  
  break;
case 200000:
  particleGun->SetParticleEnergy(300.*keV); 
 break;
 case 300000:
  particleGun->SetParticleEnergy(400.*keV); 
 break; 
 case 400000:
  particleGun->SetParticleEnergy(500.*keV); 
 break;
 case 500000:
  particleGun->SetParticleEnergy(662.*keV);  
 break;
 case 600000:
  particleGun->SetParticleEnergy(700.*keV);
 break;  
 case 700000:
  particleGun->SetParticleEnergy(800.*keV);
 break;  
 case 800000:
  particleGun->SetParticleEnergy(900.*keV); 
 break; 
 case 900000:
  particleGun->SetParticleEnergy(1130.*keV);  
  break;
 case 1000000:
  particleGun->SetParticleEnergy(1460.*keV); 
 break; 
 case 1100000:
  particleGun->SetParticleEnergy(2615.*keV); 
 break;
 case 1200000:
  particleGun->SetParticleEnergy(4000.*keV);  
 break;
 case 1300000:
  particleGun->SetParticleEnergy(5000.*keV); 
  break;
 case 1400000:
  particleGun->SetParticleEnergy(6000.*keV);
  break;  
 case 1500000:
  particleGun->SetParticleEnergy(7000.*keV);
  break;  
 case 1600000:
  particleGun->SetParticleEnergy(8000.*keV);
  break;  
 case 1700000:
  particleGun->SetParticleEnergy(9000.*keV);
  break;  
 case 1800000:
  particleGun->SetParticleEnergy(10000.*keV);
  break;  
 }
   EventEnergy=particleGun->GetParticleEnergy()/keV; 
   //G4cout<<EventEnergy<<G4endl;  
particleGun->SetParticleMomentumDirection(v);
particleGun->GeneratePrimaryVertex(anEvent);
}