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//
// $Id: PhysicsList.cc,v 1.16 2008/12/05 17:46:12 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//

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

#include "G4EmStandardPhysics.hh"
#include "G4EmStandardPhysics_option1.hh"
#include "G4EmStandardPhysics_option2.hh"
#include "G4EmStandardPhysics_option3.hh"
#include "G4DecayPhysics.hh"

#include "G4PAIModel.hh"
#include "G4PAIPhotonModel.hh"

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

#include "G4UnitsTable.hh"
#include "G4LossTableManager.hh"

#include "StepMax.hh"

#include "G4ProcessManager.hh"
#include "G4ParticleTypes.hh"
#include "G4ParticleTable.hh"

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PhysicsList::PhysicsList() : G4VModularPhysicsList()
{
  G4LossTableManager::Instance();
  defaultCutValue = 1.*mm;
  cutForGamma     = defaultCutValue;
  cutForElectron  = defaultCutValue;
  cutForPositron  = defaultCutValue;

  stepMaxProcess  = 0;

  pMessenger = new PhysicsListMessenger(this);

  // Decay Physics is always defined
  generalPhysicsList = new G4DecayPhysics();

  // EM physics
  emName = G4String("emstandard");
  emPhysicsList = new G4EmStandardPhysics(1);

  SetVerboseLevel(1);
}

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PhysicsList::~PhysicsList()
{
  delete pMessenger;
  delete generalPhysicsList;
  delete emPhysicsList;
  for(size_t i=0; i<hadronPhys.size(); i++) delete hadronPhys[i];
  delete stepMaxProcess;
}

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

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void PhysicsList::ConstructProcess()
{
  AddTransportation();
  emPhysicsList->ConstructProcess();
  em_config.AddModels();
  generalPhysicsList->ConstructProcess();
  for(size_t i=0; i<hadronPhys.size(); i++) hadronPhys[i]->ConstructProcess();
  AddStepMax();
}

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

  if (name == emName) {
    return;

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

    emName = name;
    delete emPhysicsList;
    emPhysicsList = new G4EmStandardPhysics_option1();

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

    emName = name;
    delete emPhysicsList;
    emPhysicsList = new G4EmStandardPhysics_option2();

  } else if (name == "emstandard_opt3") {

    emName = name;
    delete emPhysicsList;
    emPhysicsList = new G4EmStandardPhysics_option3();

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

    emName = name;
    AddPAIModel(name);

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

    emName = name;
    AddPAIModel(name);

  } else {

    G4cout << "PhysicsList::AddPhysicsList: <" << name << ">"
           << " is not defined"
           << G4endl;
  }
}

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void PhysicsList::AddStepMax()
{
  // Step limitation seen as a process
  stepMaxProcess = new StepMax();

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

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

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void PhysicsList::SetCuts()
{

  if ( verboseLevel > 0 )
  {
    G4cout << "PhysicsList::SetCuts:";
    G4cout << "CutLength : " << G4BestUnit(defaultCutValue,"Length") << G4endl;
  }

  // set cut values for gamma at first and for e- second and next for e+,
  // because some processes for e+/e- need cut values for gamma

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

  if ( verboseLevel > 0 ) DumpCutValuesTable();
}

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void PhysicsList::SetCutForGamma(G4double cut)
{
  cutForGamma = cut;
  SetParticleCuts(cutForGamma, G4Gamma::Gamma());
}

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void PhysicsList::SetCutForElectron(G4double cut)
{
  cutForElectron = cut;
  SetParticleCuts(cutForElectron, G4Electron::Electron());
}

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void PhysicsList::SetCutForPositron(G4double cut)
{
  cutForPositron = cut;
  SetParticleCuts(cutForPositron, G4Positron::Positron());
}

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void PhysicsList::AddPAIModel(const G4String& modname)
{
  theParticleIterator->reset();
  while ((*theParticleIterator)())
  {
    G4ParticleDefinition* particle = theParticleIterator->value();
    G4String partname = particle->GetParticleName();
    if(partname == "e-" || partname == "e+") {
      NewPAIModel(particle, modname, "eIoni");

    } else if(partname == "mu-" || partname == "mu+") {
      NewPAIModel(particle, modname, "muIoni");

    } else if(partname == "proton" ||
	      partname == "pi+" ||
              partname == "pi-"   
	      ) {
      NewPAIModel(particle, modname, "hIoni");
    }
  }
}

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void PhysicsList::NewPAIModel(const G4ParticleDefinition* part, 
			      const G4String& modname,
			      const G4String& procname)
{
  G4String partname = part->GetParticleName();
  if(modname == "pai") {
    G4PAIModel* pai = new G4PAIModel(part,"PAIModel");
    em_config.SetExtraEmModel(partname,procname,pai,"VertexDetector",
			      0.0,100.*TeV,pai);
  } else if(modname == "pai_photon") {
    G4PAIPhotonModel* pai = new G4PAIPhotonModel(part,"PAIPhotModel");
    em_config.SetExtraEmModel(partname,procname,pai,"VertexDetector",
			      0.0,100.*TeV,pai);
  }
}

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