G4OpAbsorption.cc

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//
//
// Optical Photon Absorption Class Implementation
//
// File:        G4OpAbsorption.cc
// Description: Discrete Process -- Absorption of Optical Photons  
// Version:     1.0
// Created:     1996-05-21
// Author:      Juliet Armstrong
// Updated:     2005-07-28 - add G4ProcessType to constructor
//              2000-09-18 by Peter Gumplinger
//              > comment out warning - "No Absorption length specified" 
//              1997-04-09 by Peter Gumplinger
//              > new physics/tracking scheme
//              1998-08-25 by Stefano Magni
//              > Change process to use G4MaterialPropertiesTables
//              1998-09-03 by Peter Gumplinger
//              > Protect G4MaterialPropertyVector* AttenuationLengthVector
// mail:        gum@triumf.ca
//              magni@mi.infn.it
//

#include "G4ios.hh"
#include "G4OpProcessSubType.hh"

#include "G4OpAbsorption.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4OpAbsorption::G4OpAbsorption(const G4String& processName, G4ProcessType type)
  : G4VDiscreteProcess(processName, type)
{
  if (verboseLevel >0 ) {
     G4cout << GetProcessName() << " is created " << G4endl;
  }

  SetProcessSubType(fOpAbsorption);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4OpAbsorption::~G4OpAbsorption()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4VParticleChange*
G4OpAbsorption::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep)
{
  aParticleChange.Initialize(aTrack);

  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
  G4double thePhotonMomentum = aParticle->GetTotalMomentum();

  aParticleChange.ProposeLocalEnergyDeposit(thePhotonMomentum);

  aParticleChange.ProposeTrackStatus(fStopAndKill);

  if (verboseLevel>0) {
    G4cout << "\n** Photon absorbed! **" << G4endl;
  }
  return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4double G4OpAbsorption::GetMeanFreePath(const G4Track& aTrack,
                 G4double,
                 G4ForceCondition*)
{
  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
  const G4Material* aMaterial = aTrack.GetMaterial();

  G4double thePhotonMomentum = aParticle->GetTotalMomentum();

  G4MaterialPropertiesTable* aMaterialPropertyTable;
  G4MaterialPropertyVector* AttenuationLengthVector;

  G4double AttenuationLength = DBL_MAX;

  aMaterialPropertyTable = aMaterial->GetMaterialPropertiesTable();

  if (aMaterialPropertyTable) {
    AttenuationLengthVector = aMaterialPropertyTable->GetProperty(kABSLENGTH);
    if (AttenuationLengthVector) {
      AttenuationLength = AttenuationLengthVector->Value(thePhotonMomentum);
    }
    //    else {
    //    G4cout << "No Absorption length specified" << G4endl;
    //    }
  }
  //  else {
  //           G4cout << "No Absorption length specified" << G4endl;
  //  }

  return AttenuationLength;
}