examples/advanced/microbeam/src/PhysicsList.cc

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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software 
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
// The Geant4-DNA web site is available at http://geant4-dna.org
// 
// If you use this example, please cite the following publication:
// Rad. Prot. Dos. 133 (2009) 2-11

#include "PhysicsList.hh"
#include "PhysicsListMessenger.hh"

#include "G4SystemOfUnits.hh"
#include "G4StepLimiter.hh"

#include "G4EmStandardPhysics.hh"
#include "G4EmStandardPhysics_option1.hh"
#include "G4EmStandardPhysics_option2.hh"
#include "G4EmStandardPhysics_option3.hh"
#include "G4EmStandardPhysics_option4.hh"
#include "G4EmLivermorePhysics.hh"
#include "G4EmPenelopePhysics.hh"
#include "G4DecayPhysics.hh"

#include "G4ProcessManager.hh"

#include "G4Gamma.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"

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PhysicsList::PhysicsList() : G4VModularPhysicsList()
{
  fMessenger = new PhysicsListMessenger(this);

  SetVerboseLevel(1);

  // EM physics
  fEmName = G4String("emlivermore");  

  fEmPhysicsList = new G4EmLivermorePhysics();

  // Deacy physics and all particles
  fDecPhysicsList = new G4DecayPhysics();
}

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PhysicsList::~PhysicsList()
{
  delete fMessenger;
  delete fEmPhysicsList;
  delete fDecPhysicsList;
}

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void PhysicsList::ConstructParticle()
{
  fDecPhysicsList->ConstructParticle();
}

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void PhysicsList::ConstructProcess()
{
  // transportation
  AddTransportation();
  
  // electromagnetic physics list
  fEmPhysicsList->ConstructProcess();

  // decay physics list
  fDecPhysicsList->ConstructProcess();
  
  // step limitation (as a full process)
  AddStepMax();  
  
}

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void PhysicsList::AddPhysicsList(const G4String& name)
{
  if (verboseLevel>1) {
    G4cout << "PhysicsList::AddPhysicsList: <" << name << ">" << G4endl;
  }

  if (name == fEmName) return;

  if (name == "emstandard_opt0") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics(1);

  } else if (name == "emstandard_opt1") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics_option1();

  } else if (name == "emstandard_opt2") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics_option2();
    
  } else if (name == "emstandard_opt3") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics_option3();    

  } else if (name == "emstandard_opt4") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics_option4();    

  } else if (name == "emlivermore") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmLivermorePhysics();

  } else if (name == "empenelope") {
    
    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmPenelopePhysics();

  } 
}

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void PhysicsList::AddStepMax()
{
  // Step limitation seen as a process

  fStepMaxProcess = new G4StepLimiter();

  auto particleIterator=GetParticleIterator();
  
  particleIterator->reset();
  
  while ((*particleIterator)()){
      G4ParticleDefinition* particle = particleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();

    if (fStepMaxProcess->IsApplicable(*particle) && pmanager)
      {
  pmanager ->AddDiscreteProcess(fStepMaxProcess);
      }
  }
}

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