G4PolarizedGammaConversion.cc

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// -------------------------------------------------------------------
//
// File name:     G4PolarizedGammaConversion
//
// Author:        Karim Laihem based on code by Michel Maire
//
// Class Description:
//   polarized version of G4GammaConversion
//
// -----------------------------------------------------------------------------
 
#include "G4PolarizedGammaConversion.hh"
 
#include "G4Electron.hh"
#include "G4EmParameters.hh"
#include "G4Gamma.hh"
#include "G4PhysicalConstants.hh"
#include "G4PolarizedGammaConversionModel.hh"
#include "G4SystemOfUnits.hh"
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4PolarizedGammaConversion::G4PolarizedGammaConversion(
  const G4String& processName, G4ProcessType type)
  : G4VEmProcess(processName, type)
  , fIsInitialised(false)
{
  SetMinKinEnergy(2.0 * electron_mass_c2);
  SetLambdaBinning(220);
  SetProcessSubType(fGammaConversion);
  SetBuildTableFlag(true);
  SetSecondaryParticle(G4Electron::Electron());
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4PolarizedGammaConversion::~G4PolarizedGammaConversion() {}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4PolarizedGammaConversion::ProcessDescription(std::ostream& out) const
{
  out << "Polarized model for gamma conversion.\n";
 
  G4VEmProcess::ProcessDescription(out);
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4bool G4PolarizedGammaConversion::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == G4Gamma::Gamma());
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4PolarizedGammaConversion::InitialiseProcess(const G4ParticleDefinition*)
{
  if(!fIsInitialised)
  {
    fIsInitialised        = true;
    G4EmParameters* param = G4EmParameters::Instance();
    G4double emin = std::max(param->MinKinEnergy(), 2. * electron_mass_c2);
    G4double emax = param->MaxKinEnergy();
    if(!EmModel(0))
    {
      SetEmModel(new G4PolarizedGammaConversionModel());
    }
    EmModel(0)->SetLowEnergyLimit(emin);
    EmModel(0)->SetHighEnergyLimit(emax);
    AddEmModel(1, EmModel(0));
  }
}