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Question G4GeneralParticleSource problem 

Forum: Particles
Date: 19 Jul, 2007
From: Jérôme Souin <Jérôme Souin>

Hi,

I'm a begginer in Geant4 (8.3) and I want to construct a radioactive source of 60Co using G4GeneralParticleSource. I'm following the examples : novice N02 and extended exrdm.

Every thing is ok during the compilation but my nucleus don't decay... and the process "Decay" doesn't appear in the list of process??

Idle> process/list
     Transportation,                msc,              hIoni,        StepLimiter
              eIoni,              eBrem,            annihil,               phot
              compt,               conv,             muIoni,            muBrems
         muPairProd

I get only that as result :

*********************************************************************************************************
* G4Track Information:   Particle = Co60[0.0],   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm      0 fm      0 eV      0 eV      0 fm      0 fm   physicopper    initStep

#Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    1      0 fm      0 fm      0 fm      0 eV      0 eV      0 fm      0 fm   physicopper   UserLimit
Track (trackID 1, parentID 0) is processed with stopping code 2

In my PhysicList I have :

#include "globals.hh"
#include "ExPerso2PhysicsList.hh"

#include "G4ProcessManager.hh"
#include "G4ParticleTypes.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ExPerso2PhysicsList::ExPerso2PhysicsList():  G4VUserPhysicsList()
{
  defaultCutValue = 1.0*cm;
   SetVerboseLevel(1);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ExPerso2PhysicsList::~ExPerso2PhysicsList() {}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructParticle()
{
  // In this method, static member functions should be called
  // for all particles which you want to use.
  // This ensures that objects of these particle types will be
  // created in the program. 

  ConstructBosons();
  ConstructLeptons();
  ConstructBaryons();
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructBosons()
{
  // pseudo-particles
  G4Geantino::GeantinoDefinition();
  G4ChargedGeantino::ChargedGeantinoDefinition();

  // gamma
  G4Gamma::GammaDefinition();
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructLeptons()
{
  // leptons
  //  e+/-
  G4Electron::ElectronDefinition();
  G4Positron::PositronDefinition();
  // mu+/-
  G4MuonPlus::MuonPlusDefinition();
  G4MuonMinus::MuonMinusDefinition();
  // nu_e
  G4NeutrinoE::NeutrinoEDefinition();
  G4AntiNeutrinoE::AntiNeutrinoEDefinition();
  // nu_mu
  G4NeutrinoMu::NeutrinoMuDefinition();
  G4AntiNeutrinoMu::AntiNeutrinoMuDefinition();
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructBaryons()
{
  //  barions
  G4Proton::ProtonDefinition();
  G4AntiProton::AntiProtonDefinition();

  G4Neutron::NeutronDefinition();
  G4AntiNeutron::AntiNeutronDefinition();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructProcess()
{
  AddTransportation();
  ConstructEM();
  ConstructGeneral();
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#include "G4ComptonScattering.hh"
#include "G4GammaConversion.hh"
#include "G4PhotoElectricEffect.hh"

#include "G4MultipleScattering.hh"

#include "G4eIonisation.hh"
#include "G4eBremsstrahlung.hh"
#include "G4eplusAnnihilation.hh"

#include "G4MuIonisation.hh"
#include "G4MuBremsstrahlung.hh"
#include "G4MuPairProduction.hh"

#include "G4hIonisation.hh"

#include "G4StepLimiter.hh"
#include "G4UserSpecialCuts.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::ConstructEM()
{
  theParticleIterator->reset();
  while( (*theParticleIterator)() ){
    G4ParticleDefinition* particle = theParticleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();
    G4String particleName = particle->GetParticleName();

    if (particleName == "gamma") {
      // gamma         
      pmanager->AddDiscreteProcess(new G4PhotoElectricEffect);
      pmanager->AddDiscreteProcess(new G4ComptonScattering);
      pmanager->AddDiscreteProcess(new G4GammaConversion);

    } else if (particleName == "e-") {
      //electron
      pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
      pmanager->AddProcess(new G4eIonisation,       -1, 2,2);
      pmanager->AddProcess(new G4eBremsstrahlung,   -1, 3,3);      

    } else if (particleName == "e+") {
      //positron
      pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
      pmanager->AddProcess(new G4eIonisation,       -1, 2,2);
      pmanager->AddProcess(new G4eBremsstrahlung,   -1, 3,3);
      pmanager->AddProcess(new G4eplusAnnihilation,  0,-1,4);

    } else if( particleName == "mu+" || 
               particleName == "mu-"    ) {
      //muon  
      pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
      pmanager->AddProcess(new G4MuIonisation,      -1, 2,2);
      pmanager->AddProcess(new G4MuBremsstrahlung,  -1, 3,3);
      pmanager->AddProcess(new G4MuPairProduction,  -1, 4,4);       

    } else if ((!particle->IsShortLived()) &&
	       (particle->GetPDGCharge() != 0.0) && 
	       (particle->GetParticleName() != "chargedgeantino")) {
      //all others charged particles except geantino
      pmanager->AddProcess(new G4MultipleScattering,-1, 1,1);
      pmanager->AddProcess(new G4hIonisation,       -1, 2,2);
      //step limit
      pmanager->AddProcess(new G4StepLimiter,       -1,-1,3);         
      ///pmanager->AddProcess(new G4UserSpecialCuts,   -1,-1,4);  
    }
  }       

}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#include "G4GenericIon.hh"
#include "G4RadioactiveDecay.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"

void ExPerso2PhysicsList::ConstructGeneral() {

     const G4IonTable     *theIonTable =  G4ParticleTable::GetParticleTable()->GetIonTable();
     G4RadioactiveDecay*   theRadioactiveDecay  = new G4RadioactiveDecay();

    for (G4int i=0; i<theIonTable->Entries(); i++) 
    {   
      G4ParticleDefinition* ionparticle = theIonTable->GetParticle(i);
      G4String particleName = theIonTable->GetParticle(i)->GetParticleName();
      if (particleName == "GenericIon") 
      {
         G4ProcessManager* ionpmanager = ionparticle->GetProcessManager();
    	 ionpmanager->SetVerboseLevel(3);
    	 ionpmanager->AddProcess(theRadioactiveDecay);
    	 ionpmanager->SetProcessOrdering(theRadioactiveDecay, idxPostStep, 1);
    	 ionpmanager->SetProcessOrdering(theRadioactiveDecay, idxAtRest, 1);
     } 
    }
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ExPerso2PhysicsList::SetCuts()
{
  //G4VUserPhysicsList::SetCutsWithDefault method sets 
  //the default cut value for all particle types 
  //
  SetCutsWithDefault();

if (verboseLevel>0) DumpCutValuesTable(); }

Thank you for your help,

J.

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