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 //
 // G4 Low energy model: n-n or p-p scattering
 // F.W. Jones, L.G. Greeniaus, H.P. Wellisch
 //  
 // For further comments see G4LEppData.hh and G4LEpp.cc
 //

#ifndef G4LEpp_h
#define G4LEpp_h 1
 
#include "globals.hh"
#include "Randomize.hh"
#include "G4Element.hh"
#include "G4ElementVector.hh"
#include "G4ElementTable.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsVector.hh"
#include "G4LPhysicsFreeVector.hh"
#include "G4Gamma.hh"
#include "G4Step.hh"
#include "G4TrackStatus.hh"
#include "G4HadronicInteraction.hh"


class G4LEpp : public G4HadronicInteraction
{
 private:

   enum { NENERGY=22, NANGLE=180 };

 public:

   G4LEpp();

   ~G4LEpp();
 
   G4HadFinalState* ApplyYourself(const G4HadProjectile& aTrack,
                                  G4Nucleus& targetNucleus);

   void SetCoulombEffects(G4int State);
  
 private:

  G4float * sig[NANGLE];
  G4float * elab;

 // The following arrays are declared static to allow the use of initializers.
 // They are initialized in G4LEppData.hh

 // Coulomb effects suppressed:
   static G4float Sig[NENERGY][NANGLE];
   static G4float Pcm[NENERGY], Elab[NENERGY], 
     dSigmax[NENERGY], Sigtot[NENERGY];

 // Coulomb effects not suppressed:
   static G4float SigCoul[NENERGY][NANGLE];
   static G4float PcmCoul[NENERGY], ElabCoul[NENERGY], 
     dSigmaxCoul[NENERGY], SigtotCoul[NENERGY];


};

#endif