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// $Id: G4NeutronHPElasticFS.hh,v 1.12 2007/06/06 12:45:13 ahoward Exp $
// GEANT4 tag $Name: geant4-09-03-ref-09 $
//
// 25-08-06 New Final State type (refFlag==3 , Legendre (Low Energy) + Probability (High Energy) )
//          is added by T. KOI
//
#ifndef G4NeutronHPElasticFS_h
#define G4NeutronHPElasticFS_h 1

#include "globals.hh"
#include "G4HadProjectile.hh"
#include "G4HadFinalState.hh"
#include "G4NeutronHPFinalState.hh"
#include "G4NeutronHPLegendreStore.hh"
#include "G4NeutronHPPartial.hh"
#include "G4NeutronHPFastLegendre.hh"
#include "G4NeutronHPInterpolator.hh"
#include "G4NeutronHPNames.hh"

class G4NeutronHPElasticFS : public G4NeutronHPFinalState
{
  public:
  
  G4NeutronHPElasticFS()
  {
    hasXsec = false; 
    theCoefficients = 0;
    theProbArray = 0;
  }
  ~G4NeutronHPElasticFS()
  {
    if(theCoefficients!=0) delete theCoefficients;
    if(theProbArray!=0) delete theProbArray;
  }
  void Init (G4double A, G4double Z, G4String & dirName, G4String & aFSType);
  G4HadFinalState * ApplyYourself(const G4HadProjectile & theTrack);
  G4NeutronHPFinalState * New() 
  {
   G4NeutronHPElasticFS * theNew = new G4NeutronHPElasticFS;
   return theNew;
  }
  
  private:
  G4int repFlag;    // Legendre coeff(1), or probability array(2), or isotropic(0).
                    // add 3: for Legendre (Low Energy) + Probability (High Energy)
  G4double tE_of_repFlag3; // transition energy in case of  repFlag 3:
  G4double targetMass; // in neutronmass units.
  G4int frameFlag;  // CMS or Lab system.
  
  G4NeutronHPLegendreStore * theCoefficients; // the legendre coefficients
  G4NeutronHPPartial * theProbArray; // the probability array p,costh for energy
  G4NeutronHPInterpolator theInt; // interpolation
  
  G4NeutronHPFastLegendre theLegend; // fast look-up for leg-integrals
};
#endif
