G4eplusTo3GammaOKVIModel.hh

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// $Id: G4eplusTo3GammaOKVIModel.hh 96909 2016-05-17 10:16:09Z vnivanch $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4eplusTo3GammaOKVIModel
//
// Author:        Vladimir Ivanchenko and Omrane Kadri 
//
// Creation date: 29.03.2018
//
//
// Class Description:
//
// Implementation of e+ annihilation into 2 gamma

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

#ifndef G4eplusTo3GammaOKVIModel_h
#define G4eplusTo3GammaOKVIModel_h 1

#include "G4VEmModel.hh"

class G4ParticleChangeForGamma;

class G4eplusTo3GammaOKVIModel : public G4VEmModel
{

public:

  explicit G4eplusTo3GammaOKVIModel(const G4ParticleDefinition* p = nullptr,
                                    const G4String& nam = "eplus3ggOKVI");

  virtual ~G4eplusTo3GammaOKVIModel();

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

  G4double ComputeCrossSectionPerElectron(G4double kinEnergy);
  
  virtual G4double ComputeCrossSectionPerAtom(
                                const G4ParticleDefinition*,
                                      G4double kinEnergy, 
                                      G4double Z, 
                                      G4double A = 0., 
                                      G4double cutEnergy = 0.,
                                      G4double maxEnergy = DBL_MAX) final;

  virtual G4double CrossSectionPerVolume(const G4Material*,
           const G4ParticleDefinition*,
           G4double kineticEnergy,
           G4double cutEnergy = 0.0,
           G4double maxEnergy = DBL_MAX) final;

  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
         const G4MaterialCutsCouple*,
         const G4DynamicParticle*,
         G4double tmin = 0.0,
         G4double maxEnergy = DBL_MAX) final;
  
private:

  // hide assignment operator
  G4eplusTo3GammaOKVIModel & operator=
  (const  G4eplusTo3GammaOKVIModel &right) = delete;
  G4eplusTo3GammaOKVIModel(const  G4eplusTo3GammaOKVIModel&) = delete;

  G4double pi_rcl2;
  G4double energyTh;
  G4ParticleDefinition*  theGamma;
  G4ParticleChangeForGamma* fParticleChange;
};

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#endif