G4ComptonScattering.cc

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// 
//------------ G4ComptonScattering physics process -----------------------------
//                   by Michel Maire, April 1996
//
// Modified: Michel Maire and Vladimir Ivanchenko
//
// -----------------------------------------------------------------------------
 
#include "G4ComptonScattering.hh"
#include "G4SystemOfUnits.hh"
#include "G4KleinNishinaModel.hh"
#include "G4KleinNishinaCompton.hh"
#include "G4Electron.hh"
#include "G4EmParameters.hh"
 
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using namespace std;
 
G4ComptonScattering::G4ComptonScattering(const G4String& processName,
  G4ProcessType type):G4VEmProcess (processName, type)
{
  SetStartFromNullFlag(true);
  SetBuildTableFlag(true);
  SetSecondaryParticle(G4Electron::Electron());
  SetProcessSubType(fComptonScattering);
  SetMinKinEnergyPrim(1*CLHEP::MeV);
  SetSplineFlag(true);
}
 
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G4ComptonScattering::~G4ComptonScattering() = default;
 
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G4bool G4ComptonScattering::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == G4Gamma::Gamma());
}
 
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void G4ComptonScattering::InitialiseProcess(const G4ParticleDefinition*)
{
  if(!isInitialised) {
    isInitialised = true;
    if(nullptr == EmModel(0)) { SetEmModel(new G4KleinNishinaCompton()); }
    G4EmParameters* param = G4EmParameters::Instance();
    EmModel(0)->SetLowEnergyLimit(param->MinKinEnergy());
    EmModel(0)->SetHighEnergyLimit(param->MaxKinEnergy());
    AddEmModel(1, EmModel(0));
  } 
}
 
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void G4ComptonScattering::ProcessDescription(std::ostream& out) const
{
  out << "  Compton scattering";
  G4VEmProcess::ProcessDescription(out);
}
 
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