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// $Id: G4CrossSectionExcitationBorn.cc,v 1.4 2008/07/14 20:47:34 sincerti Exp $
// GEANT4 tag $Name: geant4-09-02-ref-02 $

#include "G4CrossSectionExcitationBorn.hh"

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G4CrossSectionExcitationBorn::G4CrossSectionExcitationBorn()
{
  lowEnergyLimit = 500. * keV;
  highEnergyLimit = 10 * MeV;
  table = 0;
}

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

G4CrossSectionExcitationBorn::~G4CrossSectionExcitationBorn()
{
  delete table;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4double G4CrossSectionExcitationBorn::CrossSection(const G4Track& track)
{

  G4double sigma = 0.;

  if (table == 0)
  {
    table = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,(1e-22/3.343)*m*m );
    table->LoadData("dna/sigma_excitation_p_born");
  }

  const G4DynamicParticle* particle = track.GetDynamicParticle();
  G4double k = particle->GetKineticEnergy();

  if (k >= lowEnergyLimit && k <= highEnergyLimit)
  { 
    sigma = table->FindValue(k); 
  }
  return sigma;
}