source: trunk/examples/advanced/brachytherapy/src/BrachyPhysicsList.cc@ 1277

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//
//
// Code developed by:
// S. Agostinelli, F. Foppiano, S. Garelli , M. Tropeano, S.Guatelli
//
// Code review: MGP, 5 November 2006 (still to be completed)
//
//    **********************************
//    *                                *
//    *     BrachyPhysicsList.cc       *
//    *                                *
//    **********************************
//
// $Id: BrachyPhysicsList.cc,v 1.14 2009/11/12 02:50:51 cirrone Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//
#include "BrachyPhysicsList.hh"

#include "G4ParticleDefinition.hh"
#include "G4ProductionCutsTable.hh"
#include "G4ProcessManager.hh"
#include "G4ParticleTypes.hh"
#include "G4UnitsTable.hh"
#include "G4ios.hh"              
#include "G4MultipleScattering.hh"
// gamma
#include "G4PhotoElectricEffect.hh"
#include "G4LivermorePhotoElectricModel.hh"

#include "G4ComptonScattering.hh"
#include "G4LivermoreComptonModel.hh"

#include "G4GammaConversion.hh"
#include "G4LivermoreGammaConversionModel.hh"

#include "G4RayleighScattering.hh" 
#include "G4LivermoreRayleighModel.hh"

// e-
#include "G4eMultipleScattering.hh"
#include "G4eIonisation.hh"
#include "G4LivermoreIonisationModel.hh"
#include "G4eBremsstrahlung.hh"
#include "G4LivermoreBremsstrahlungModel.hh"

// e+
#include "G4eIonisation.hh" 
#include "G4eBremsstrahlung.hh" 
#include "G4eplusAnnihilation.hh"

BrachyPhysicsList::BrachyPhysicsList():  G4VUserPhysicsList()
{
  SetVerboseLevel(1);
}

BrachyPhysicsList::~BrachyPhysicsList()
{
}

void BrachyPhysicsList::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();

}

void BrachyPhysicsList::ConstructBosons()
{ 
  // photons
  G4Gamma::GammaDefinition();
}

void BrachyPhysicsList::ConstructLeptons()
{
  // leptons
  G4Electron::ElectronDefinition();
  G4Positron::PositronDefinition();
}

void BrachyPhysicsList::ConstructProcess()
{
  AddTransportation();
  ConstructEM();
}

void BrachyPhysicsList::ConstructEM()
{
  theParticleIterator->reset();

  while( (*theParticleIterator)() ){

    G4ParticleDefinition* particle = theParticleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();
    G4String particleName = particle->GetParticleName();
    
    // Processes
    
    if (particleName == "gamma") {
      
      // Photon     
      G4RayleighScattering* theRayleigh = new G4RayleighScattering();
      theRayleigh->SetModel(new G4LivermoreRayleighModel());  //not strictly necessary
      pmanager->AddDiscreteProcess(theRayleigh);

      G4PhotoElectricEffect* thePhotoElectricEffect = new G4PhotoElectricEffect();
      thePhotoElectricEffect->SetModel(new G4LivermorePhotoElectricModel());
      pmanager->AddDiscreteProcess(thePhotoElectricEffect);
        
      G4ComptonScattering* theComptonScattering = new G4ComptonScattering();
      theComptonScattering->SetModel(new G4LivermoreComptonModel());
      pmanager->AddDiscreteProcess(theComptonScattering);
        
      G4GammaConversion* theGammaConversion = new G4GammaConversion();
      theGammaConversion->SetModel(new G4LivermoreGammaConversionModel());
      pmanager->AddDiscreteProcess(theGammaConversion);
      
    } else if (particleName == "e-") {
      // Electron
      
      G4eMultipleScattering* msc = new G4eMultipleScattering();
      msc->SetStepLimitType(fUseDistanceToBoundary);
      pmanager->AddProcess(msc,-1, 1, 1);

      // Ionisation
      G4eIonisation* eIonisation = new G4eIonisation();
      eIonisation->SetEmModel(new G4LivermoreIonisationModel());
      eIonisation->SetStepFunction(0.2, 100*um); //improved precision in tracking  
      pmanager->AddProcess(eIonisation,-1, 2, 2);
        
      // Bremsstrahlung
      G4eBremsstrahlung* eBremsstrahlung = new G4eBremsstrahlung();
      eBremsstrahlung->SetEmModel(new G4LivermoreBremsstrahlungModel());
      pmanager->AddProcess(eBremsstrahlung, -1,-3, 3);
      
    } else if (particleName == "e+") {
      // Positron      
      G4eMultipleScattering* msc = new G4eMultipleScattering();
      msc->SetStepLimitType(fUseDistanceToBoundary);
      pmanager->AddProcess(msc,-1, 1, 1);
        
      // Ionisation
      G4eIonisation* eIonisation = new G4eIonisation();
      eIonisation->SetStepFunction(0.2, 100*um); //     
      pmanager->AddProcess(eIonisation,                 -1, 2, 2);

      //Bremsstrahlung (use default, no low-energy available)
      pmanager->AddProcess(new G4eBremsstrahlung(), -1,-1, 3);

      //Annihilation
      pmanager->AddProcess(new G4eplusAnnihilation(),0,-1, 4);     
      
    }
  }  
}

void BrachyPhysicsList::SetCuts()
{
  // The production threshold is fixed to 0.1 mm for all the particles
  // Secondary particles with a range bigger than 0.1 mm 
  // are generated; otherwise their energy is considered deposited locally

  defaultCutValue = 0.1 * mm;

  const G4double cutForGamma = defaultCutValue;
  const G4double cutForElectron = defaultCutValue;
  const G4double cutForPositron = defaultCutValue;

  SetCutValue(cutForGamma, "gamma");
  SetCutValue(cutForElectron, "e-");
  SetCutValue(cutForPositron, "e+");

  // Set the secondary production cut lower than 990. eV
  // Very important for high precision of lowenergy processes at low energies
 
  G4double lowLimit = 250. * eV;
  G4double highLimit = 100. * GeV;
  G4ProductionCutsTable::GetProductionCutsTable()->SetEnergyRange(lowLimit, highLimit);
  
  if (verboseLevel>0) DumpCutValuesTable();
}