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// $Id: G4CameronTruranHilfPairingCorrections.hh,v 1.5 2009/03/04 11:05:02 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03-ref-09 $
//
// Hadronic Process: Nuclear De-excitations
// by V. Lara

#ifndef G4CameronTruranHilfPairingCorrections_h
#define G4CameronTruranHilfPairingCorrections_h 1

#include "globals.hh"

//#define verbose 1

class G4CameronTruranHilfPairingCorrections
{
private:

  G4CameronTruranHilfPairingCorrections();
	
  static G4CameronTruranHilfPairingCorrections* theInstance;


public:
  static G4CameronTruranHilfPairingCorrections* GetInstance();

  ~G4CameronTruranHilfPairingCorrections();

  G4double GetParingCorrection(const G4int A, const  G4int Z) const
  {
    return GetPairingZ(Z) + GetPairingN(A-Z);
  }


  G4double GetPairingZ(const G4int Z) const 
  {
    if (IsInTableThisZ(Z)) return -PairingZTable[Z-ZTableMin]*MeV; // Notice the sign 
    else {
#ifdef verbose
      G4cerr << "G4CameronTruranHilfPairingCorrections: out of table for Z = " << Z << G4endl;
#endif
      return 0.0;
    }
  }
  
  G4bool IsInTableThisZ(const G4int Z) const 
  {
    if ( Z >= ZTableMin && Z <= ZTableMax ) return true;
    else return false;
  }

	
  G4double GetPairingN(const G4int N)  const 
  {
    if (IsInTableThisN(N)) return -PairingNTable[N-NTableMin]*MeV; // Notice the sign
    else {
#ifdef verbose
      G4cerr << "G4CameronTruranHilfPairingCorrections: out of table for N = " << N << G4endl;
#endif
      return 0.0;
    }
  }
  
  G4bool IsInTableThisN(const G4int N)  const 
  {
    if ( N >= NTableMin && N <= NTableMax ) return true;
    else return false;
  }


  enum  { ZTableSize = 93, NTableSize = 146, ZTableMin = 10, ZTableMax = 102,
	  NTableMin = 10, NTableMax = 155 };
private:



    static const G4double PairingZTable[ZTableSize];

    static const G4double PairingNTable[NTableSize];
	
};
#endif