F06ExtraPhysics.cc

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#include "globals.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4ProcessManager.hh"

#include "G4Decay.hh"
#include "G4DecayTable.hh"
#include "G4NeutronBetaDecayChannel.hh"

#include "G4UserSpecialCuts.hh"
#include "G4StepLimiter.hh"
#include "G4SystemOfUnits.hh"

#include "F06ExtraPhysics.hh"

F06ExtraPhysics::F06ExtraPhysics() 
    : G4VPhysicsConstructor("Extra") {;}

F06ExtraPhysics::~F06ExtraPhysics() {;}

void F06ExtraPhysics::ConstructParticle() {;}

void F06ExtraPhysics::ConstructProcess()
{
    theParticleIterator->reset();

    while ((*theParticleIterator)()) {
        G4ParticleDefinition* particle = theParticleIterator->value();
        G4ProcessManager* pmanager = particle->GetProcessManager();
        G4String particleName = particle->GetParticleName();

        if (!pmanager) {
            std::ostringstream o;
            o << "Particle " << particleName << "without a Process Manager";
            G4Exception("F06ExtraPhysics::ConstructProcess()","",
                         FatalException,o.str().c_str());
        }

        pmanager->AddDiscreteProcess(new G4StepLimiter());
        pmanager->AddDiscreteProcess(new G4UserSpecialCuts());
    }

    AddBetaDecay();
}

void F06ExtraPhysics::AddBetaDecay()
{
    theParticleIterator->reset();

    while ((*theParticleIterator)()) {

        G4ParticleDefinition* particle = theParticleIterator->value();
        G4String particleName = particle->GetParticleName();

        if (particleName == "neutron") {

           particle->SetPDGLifeTime(885.7*second);
           particle->SetPDGStable(false);

           G4DecayTable * table = new G4DecayTable();
           G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("neutron",1.00);
           table->Insert(mode);
           particle->SetDecayTable(table);

           G4ProcessManager* pmanager = particle->GetProcessManager();
           if (!pmanager) {
               std::ostringstream o;
               o << "Particle " << particleName << "without a Process Manager";
               G4Exception("F06ExtraPhysics::ConstructProcess()","",
                            FatalException,o.str().c_str());
           }

           G4Decay* theDecayProcess = new G4Decay();
           pmanager->AddProcess(theDecayProcess);
           pmanager->SetProcessOrdering(theDecayProcess,idxPostStep);
           pmanager->SetProcessOrdering(theDecayProcess,idxAtRest);

           break;
        }
    }
}