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// $Id$
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4HeatedKleinNishinaCompton
//
// Author:        Vladimir Grichine on base of M. Maire and V. Ivanchenko code
//
// Creation date: 15.03.2009
//
// Modifications:
// 
//
//
// Class Description:
//
// Implementation of gamma Compton scattering on heated electrons 
// Maxwell distributed with the temperature fTemperature (default = 1*keV)
// 

// -------------------------------------------------------------------
//

#ifndef G4HeatedKleinNishinaCompton_h
#define G4HeatedKleinNishinaCompton_h 1

#include "G4VEmModel.hh"

class G4ParticleChangeForGamma;

class G4HeatedKleinNishinaCompton : public G4VEmModel
{

public:

  G4HeatedKleinNishinaCompton(const G4ParticleDefinition* p = 0, 
			const G4String& nam = "Heated-Klein-Nishina");

  virtual ~G4HeatedKleinNishinaCompton();

  virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);

  virtual G4double ComputeCrossSectionPerAtom(
                                const G4ParticleDefinition*,
                                      G4double kinEnergy, 
                                      G4double Z, 
                                      G4double A, 
                                      G4double cut,
                                      G4double emax);

  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
				 const G4MaterialCutsCouple*,
				 const G4DynamicParticle*,
				 G4double tmin,
				 G4double maxEnergy);

  void     SetElectronTemperature(G4double t){fTemperature=t;};
  G4double GetElectronTemperature(){return fTemperature;};

protected:

  G4ParticleDefinition*     theGamma;
  G4ParticleDefinition*     theElectron;
  G4ParticleChangeForGamma* fParticleChange;
  G4double                  lowestGammaEnergy;
  G4double                  fTemperature;  // electron temperature in energy units

private:

  // hide assignment operator
  G4HeatedKleinNishinaCompton & operator=(const  G4HeatedKleinNishinaCompton &right);
  G4HeatedKleinNishinaCompton(const  G4HeatedKleinNishinaCompton&);

};

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#endif