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// $Id: G4CrossSectionPsCreationChampion.cc,v 1.2 2009/06/10 13:32:36 mantero Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $
// -------------------------------------------------------------------

#include "G4CrossSectionPsCreationChampion.hh"

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G4CrossSectionPsCreationChampion::G4CrossSectionPsCreationChampion()
{
  lowEnergyLimit = 10. * eV;
  highEnergyLimit = 5. * keV;

  G4ParticleDefinition* positronDef = G4Positron::PositronDefinition();
  if (positronDef ==0 ) G4Exception("G4CrossSectionPsCreationchampion constructor: positron is not defined");
}

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G4CrossSectionPsCreationChampion::~G4CrossSectionPsCreationChampion()
{}

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G4double G4CrossSectionPsCreationChampion::CrossSection(const G4Track& track )
{
  const G4DynamicParticle* particle = track.GetDynamicParticle();
  G4double k = particle->GetKineticEnergy();
  const G4ParticleDefinition* particleDefinition = track.GetDefinition();
  
  if (particleDefinition != G4Positron::PositronDefinition())
     G4Exception("G4CrossSectionPsCreationChampion::CrossSection: attempting to calculate cross section for wrong particle");

  G4double totalCrossSection = 0.;

  if (k > lowEnergyLimit && k < highEnergyLimit)
  {
    totalCrossSection = partialCrossSection.Sum(k,particleDefinition);
  }
  return totalCrossSection;
}