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// $Id: RemSimPhotonEPDL.cc,v 1.8 2009/11/12 05:12:18 cirrone Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//
// Author:Susanna Guatelli, guatelli@ge.infn.it 
//
#include "RemSimPhotonEPDL.hh"

#include "G4ProcessManager.hh"
#include "G4Gamma.hh"
#include "G4ParticleDefinition.hh"

#include "G4PhotoElectricEffect.hh"
#include "G4LivermorePhotoElectricModel.hh"

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

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

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

#include "G4StepLimiter.hh"

RemSimPhotonEPDL::RemSimPhotonEPDL(const G4String& name):
 G4VPhysicsConstructor(name)
{ }

RemSimPhotonEPDL::~RemSimPhotonEPDL()
{ }

void RemSimPhotonEPDL::ConstructProcess()
{
  // Add EPDL processes for photons
  
  theParticleIterator -> reset();

  while( (*theParticleIterator)() )
    {
      G4ParticleDefinition* particle = theParticleIterator -> value();
      G4ProcessManager* pmanager = particle -> GetProcessManager();
      G4String particleName = particle -> GetParticleName();
     
      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);  
     
      pmanager->AddProcess(new G4StepLimiter(),  -1,-1,3);
	}   
    }
}