G4ParticleChangeForGamma.cc

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//
// G4ParticleChangeForGamma class implementation
//
// Author: Hisaya Kurashige, 23 March 1998  
// Revision: Vladimir Ivantchenko, 15 April 2005
// --------------------------------------------------------------------
 
#include "G4ParticleChangeForGamma.hh"
#include "G4SystemOfUnits.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4DynamicParticle.hh"
#include "G4ExceptionSeverity.hh"
 
// --------------------------------------------------------------------
G4ParticleChangeForGamma::G4ParticleChangeForGamma() 
{
  // Disable flag to avoid check of each secondary at each step
  debugFlag = false;
  SetNumberOfSecondaries(2);
}
 
// --------------------------------------------------------------------
void G4ParticleChangeForGamma::AddSecondary(G4DynamicParticle* aParticle)
{
  // create track
  G4Track* aTrack = new G4Track(aParticle, theCurrentTrack->GetGlobalTime(),
                                theCurrentTrack->GetPosition());
 
  // touchable handle is copied to keep the pointer
  aTrack->SetTouchableHandle(theCurrentTrack->GetTouchableHandle());
 
  // add a secondary
  G4VParticleChange::AddSecondary(aTrack);
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForGamma::UpdateStepForAtRest(G4Step* pStep)
{
  pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
  pStep->SetStepLength(0.0);
 
  if(isParentWeightProposed)
  {
    pStep->GetPostStepPoint()->SetWeight(theParentWeight);
  }
 
  return pStep;
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForGamma::UpdateStepForPostStep(G4Step* pStep)
{
  G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
 
  pPostStepPoint->SetMomentumDirection(proposedMomentumDirection);
  pPostStepPoint->SetPolarization(proposedPolarization);
 
  // update velocity for scattering process and particles with mass
  if(proposedKinEnergy > 0.0) 
  {
    pPostStepPoint->SetKineticEnergy(proposedKinEnergy);
    G4double mass = theCurrentTrack->GetDefinition()->GetPDGMass();
    G4double v = CLHEP::c_light;
    if(mass > 0.0) { 
      v *= std::sqrt(proposedKinEnergy*(proposedKinEnergy + 2*mass))/
    (proposedKinEnergy + mass);
    }
    pPostStepPoint->SetVelocity(v);
  }
  else 
  {
    pPostStepPoint->SetKineticEnergy(0.0);
    pPostStepPoint->SetVelocity(0.0);
  }
 
  if(isParentWeightProposed)
  {
    pPostStepPoint->SetWeight(theParentWeight);
  }
 
  pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
  pStep->AddNonIonizingEnergyDeposit(theNonIonizingEnergyDeposit);
  return pStep;
}
 
// --------------------------------------------------------------------
void G4ParticleChangeForGamma::DumpInfo() const
{
  // use base-class DumpInfo
  G4VParticleChange::DumpInfo();
 
  G4long oldprc = G4cout.precision(8);
  G4cout << "      -----------------------------------------------" << G4endl;
  G4cout << "        G4ParticleChangeForGamma proposes: " << G4endl;
  G4cout << "        Kinetic Energy (MeV): " << std::setw(20)
         << proposedKinEnergy / MeV << G4endl;
  G4cout << "        Momentum Direction: " << std::setw(20)
         << proposedMomentumDirection << G4endl;
  G4cout << "        Polarization: " << std::setw(20) << proposedPolarization
         << G4endl;
  G4cout.precision(oldprc);
}