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// $Id: G4E1Probability.hh,v 1.5 2010/05/19 10:21:44 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-04-beta-cand-01 $
//
//---------------------------------------------------------------------
//
// Geant4 header G4E1Probability
//
// by V. Lara (May 2003)
//
// Modifications:
// 18.05.2010 V.Ivanchenko trying to speedup the most slow method
//            by usage of G4Pow, integer A and introduction of const members
//
//

#ifndef G4E1Probability_hh
#define G4E1Probability_hh

#include "globals.hh"
#include "G4VEmissionProbability.hh"
#include "G4Fragment.hh"

class G4Pow;

class G4E1Probability : public G4VEmissionProbability
{

public:

  G4E1Probability();

  virtual ~G4E1Probability();

  G4double EmissionProbability(const G4Fragment& frag, const G4double excite);
  G4double EmissionProbDensity(const G4Fragment& frag, const G4double ePhoton);

private:

  G4E1Probability(const G4E1Probability& right);

  const G4E1Probability& operator=(const G4E1Probability& right);
  G4bool operator==(const G4E1Probability& right) const;
  G4bool operator!=(const G4E1Probability& right) const;

  // Integrator (simple Gaussian quadrature)
  G4double EmissionIntegration(const G4Fragment& frag, const G4double excite,
                               const G4double lowLim, const G4double upLim,
                               const G4int numIters);

  // members
  G4Pow*   fG4pow;
  G4double theLevelDensityParameter;
  G4double normC;

};

#endif
