G4IonProtonCrossSection.cc

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// $Id: G4IonProtonCrossSection.cc 90447 2015-05-29 07:41:53Z gcosmo $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:  G4IonProtonCrossSection
//
// Author  Ivantchenko, Geant4, 30 July 2010
//
// Modifications:
//

#include "G4IonProtonCrossSection.hh"
#include "G4SystemOfUnits.hh"
#include "G4ProtonInelasticCrossSection.hh"
#include "G4DynamicParticle.hh"
#include "G4Element.hh"
#include "G4HadTmpUtil.hh"

using namespace std;

G4IonProtonCrossSection::G4IonProtonCrossSection() 
  : G4VCrossSectionDataSet("AxenWellischIonH") 
{
  theForward = new G4ProtonInelasticCrossSection();
}

G4IonProtonCrossSection::~G4IonProtonCrossSection()
{}

G4bool 
G4IonProtonCrossSection::IsElementApplicable(const G4DynamicParticle* dp, 
                                             G4int Z, const G4Material*)
{
  return ((1 == Z) && (dp->GetDefinition()->GetPDGCharge()/eplus > 1.5)); 
}


G4double 
G4IonProtonCrossSection::GetElementCrossSection(
                                   const G4DynamicParticle* dp, 
                                   G4int, const G4Material*)
{
  const G4ParticleDefinition* p = dp->GetDefinition();
  G4double e = dp->GetKineticEnergy()*CLHEP::proton_mass_c2/p->GetPDGMass();
  return 
    theForward->GetProtonCrossSection(e, G4lrint(p->GetPDGCharge()/eplus));
}

void 
G4IonProtonCrossSection::CrossSectionDescription(std::ostream& outFile) const
{
  outFile << "G4IonProtonCrossSection calculates the inelastic cross section\n"
          << "for any ion projectile with Z >=2 only on hydrogen target.\n"
          << "It uses the inverse kinematics and the Axen-Wellisch\n"
          << "inelastic cross section (G4ProtonInelasticCrossSection).\n"; 
}