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// $Id$
//
//
//J.M. Quesada (August2008). Based on:
//
// Hadronic Process: Nuclear De-excitations
// by V. Lara (Oct 1998)
//
// 17-11-2010 V.Ivanchenko in constructor replace G4VEmissionProbability by 
//            G4EvaporationProbability and do not new and delete probability
//            object at each call; use G4Pow

#ifndef G4EvaporationChannel_h
#define G4EvaporationChannel_h 1

#include "G4VEvaporationChannel.hh"
#include "G4EvaporationProbability.hh"
#include "G4VCoulombBarrier.hh"

class G4EvaporationLevelDensityParameter;

class G4EvaporationChannel : public G4VEvaporationChannel
{
public:
  // constructor
  G4EvaporationChannel(G4int theA, G4int theZ, const G4String & aName,
		       G4EvaporationProbability * aEmissionStrategy,
	               G4VCoulombBarrier * aCoulombBarrier);

  // destructor
  virtual ~G4EvaporationChannel();
  
  inline void SetEmissionStrategy(G4EvaporationProbability * aEmissionStrategy)
  {theEvaporationProbabilityPtr = aEmissionStrategy;}

  inline void SetCoulombBarrierStrategy(G4VCoulombBarrier * aCoulombBarrier)
  {theCoulombBarrierPtr = aCoulombBarrier;} 
    
protected:
  // default constructor
  G4EvaporationChannel();
  
public:  

  //  virtual void Initialize(const G4Fragment & fragment);

  virtual G4double GetEmissionProbability(G4Fragment* fragment); 

  G4FragmentVector * BreakUp(const G4Fragment & theNucleus);

  inline G4double GetMaximalKineticEnergy(void) const 
  { return MaximalKineticEnergy; }
  
private: 
  
  // Calculate Binding Energy for separate fragment from nucleus
  G4double CalcBindingEnergy(G4int anA, G4int aZ);

  // Calculate maximal kinetic energy that can be carried by fragment (in MeV)
  G4double CalcMaximalKineticEnergy(G4double U);

  // Samples fragment kinetic energy.
  G4double  GetKineticEnergy(const G4Fragment & aFragment);

  // This has to be removed and put in Random Generator
  G4ThreeVector IsotropicVector(G4double Magnitude  = 1.0);

  G4EvaporationChannel(const G4EvaporationChannel & right);
  const G4EvaporationChannel & operator=(const G4EvaporationChannel & right);
  G4bool operator==(const G4EvaporationChannel & right) const;
  G4bool operator!=(const G4EvaporationChannel & right) const;

	// Data Members
	// ************
private:

  // This data member define the channel. 
  // They are intializated at object creation (constructor) time.

  // Atomic Number of ejectile
  G4int theA;

  // Charge of ejectile
  G4int theZ;

  G4double EvaporatedMass;
  G4double ResidualMass;

  // For evaporation probability calcualation
  G4EvaporationProbability * theEvaporationProbabilityPtr;

  // For Level Density calculation
  // G4bool MyOwnLevelDensity;
  G4VLevelDensityParameter * theLevelDensityPtr;

  // For Coulomb Barrier calculation
  G4VCoulombBarrier * theCoulombBarrierPtr;
  G4double CoulombBarrier;
   
  //---------------------------------------------------

  // These values depend on the nucleus that is being evaporated.
  // They are calculated through the Initialize method which takes as parameters 
  // the atomic number, charge and excitation energy of nucleus.

  // Residual Mass Number
  G4int ResidualA;

  // Residual Charge
  G4int ResidualZ;
	
  // Emission Probability
  G4double EmissionProbability;

  // Maximal Kinetic Energy that can be carried by fragment
  G4double MaximalKineticEnergy;

};


#endif