PhysListEmStandard_GS.cc

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// $Id: PhysListEmStandard_GS.cc 100265 2016-10-17 08:11:18Z gcosmo $
//
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#include "PhysListEmStandard_GS.hh"
#include "DetectorConstruction.hh"

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

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

#include "G4eMultipleScattering.hh"
#include "G4GoudsmitSaundersonMscModel.hh"

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

#include "G4hIonisation.hh"
#include "G4hMultipleScattering.hh"

#include "G4EmParameters.hh"
#include "G4MscStepLimitType.hh"

#include "G4BuilderType.hh"
#include "G4SystemOfUnits.hh"

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PhysListEmStandard_GS::PhysListEmStandard_GS(const G4String& name,
                               DetectorConstruction* det)
: G4VPhysicsConstructor(name), fDetector(det)
{
  G4EmParameters* param = G4EmParameters::Instance();
  param->SetDefaults();
  param->SetVerbose(1);
  param->SetMinEnergy(100*eV);
  param->SetMaxEnergy(10*GeV);
  param->SetNumberOfBinsPerDecade(20);
  param->SetLowestElectronEnergy(1*eV);
  param->SetBuildCSDARange(true);
  param->SetMaxEnergyForCSDARange(10*GeV);
  param->SetMscStepLimitType(fUseDistanceToBoundary);
  SetPhysicsType(bElectromagnetic);
}

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PhysListEmStandard_GS::~PhysListEmStandard_GS()
{}

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void PhysListEmStandard_GS::ConstructProcess()
{
  // Add standard EM Processes
  //

  auto particleIterator=GetParticleIterator();
  particleIterator->reset();
  while( (*particleIterator)() ){
    G4ParticleDefinition* particle = particleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();
    G4String particleName = particle->GetParticleName();
     
    if (particleName == "gamma") {
      // gamma
    
      G4ComptonScattering* compton = new G4ComptonScattering();
      MyKleinNishinaCompton* comptonModel = 
        new MyKleinNishinaCompton(fDetector);
      comptonModel->SetCSFactor(1000.);      
      compton->SetEmModel(comptonModel );
            
      pmanager->AddDiscreteProcess(new G4PhotoElectricEffect);
      pmanager->AddDiscreteProcess(compton);
      pmanager->AddDiscreteProcess(new G4GammaConversion);
      
    } else if (particleName == "e-") {
      //electron

      G4eMultipleScattering* eMsc = new G4eMultipleScattering();
      eMsc->AddEmModel(1, new G4GoudsmitSaundersonMscModel);
            
      G4eIonisation* eIoni = new G4eIonisation();
      eIoni->SetEmModel(new MyMollerBhabhaModel);
      eIoni->SetStepFunction(0.2, 10*um);
                         
      pmanager->AddProcess(eMsc,                      -1, 1, 1);
      pmanager->AddProcess(eIoni,                     -1, 2, 2);
            
    } else if (particleName == "e+") {
      //positron

      G4eMultipleScattering* pMsc = new G4eMultipleScattering();
      pMsc->AddEmModel(1, new G4GoudsmitSaundersonMscModel);
            
      G4eIonisation* pIoni = new G4eIonisation();
      pIoni->SetEmModel(new MyMollerBhabhaModel);
                               
      pmanager->AddProcess(pMsc,                      -1, 1, 1);
      pmanager->AddProcess(pIoni,                     -1, 2, 2);
      pmanager->AddProcess(new G4eplusAnnihilation,    0,-1, 3);
             
    } else if( particleName == "proton" ) {
      //proton  
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(new G4hIonisation,         -1, 2, 2);
    }
  }
}

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