G4CrossSectionPairGG.hh

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//
//   Class G4CrossSectionPairGG
//
//     Extend a cross section to higher energies using
//       G4ComponentGGHadronNucleusXsc at high energies.
//       Smoothly join cross section sets by scaling GG at a given 
//       transition energy to match the given low energy cross section.
//
//  Author:  Gunter Folger
//           November 2010
//
#ifndef G4CrossSectionPairGG_h
#define G4CrossSectionPairGG_h

#include "globals.hh"
#include "G4VCrossSectionDataSet.hh"
#include "G4ParticleDefinition.hh"
#include <valarray>
#include <iostream>

class G4NistManager;
class G4ComponentGGHadronNucleusXsc;

class G4CrossSectionPairGG : public G4VCrossSectionDataSet
{
private:

public:
  G4CrossSectionPairGG(G4VCrossSectionDataSet * low,
           G4double Etransit);
            
  virtual ~G4CrossSectionPairGG();

  virtual void CrossSectionDescription(std::ostream&) const;

  virtual
  G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z, 
           const G4Material* mat = 0);

  virtual
  G4double GetElementCrossSection(const G4DynamicParticle*, G4int Z,
          const G4Material* mat = 0);

  virtual void BuildPhysicsTable(const G4ParticleDefinition&);
  virtual void DumpPhysicsTable(const G4ParticleDefinition&);
  
private:

  G4CrossSectionPairGG();
  G4CrossSectionPairGG(const G4CrossSectionPairGG&);
  G4CrossSectionPairGG& operator=(const G4CrossSectionPairGG&);

  G4NistManager* NistMan;
  G4VCrossSectionDataSet * theLowX;   
  G4ComponentGGHadronNucleusXsc * theHighX;
  G4double ETransition;
  typedef std::valarray<G4double> XS_factors;
  typedef std::pair<const G4ParticleDefinition *, XS_factors > ParticleXScale;
  std::vector<ParticleXScale> scale_factors;

};

#endif