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// $Id: G4eplusAnnihilation.hh 68797 2013-04-05 13:27:11Z gcosmo $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4eplusAnnihilation
//
// Author:        Vladimir Ivanchenko on base of Michel Maire code
//
// Creation date: 02.08.2004
//
// Modifications:
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivanchenko)
// 15-03-05 Update interface according to changings
//           in G4VEmProcess (V.Ivanchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivanchenko)
// 04-05-05 Make class to be default (V.Ivanchenko)
// 04-12-05 SetProposedKineticEnergy(0.) for annihilated positron (mma)
// 09-08-06 add SetModel(G4VEmModel*) (mma)
// 12-09-06, move SetModel(G4VEmModel*) in G4VEmProcess (mma)
// 14-09-22 Copied code to new file RATeplusAnnihilation.hh in RAT.
//          See docDB: doc-7593 (James Page - jp643@sussex.ac.uk).
//
// Class Description:
//
// This class manages the process of e+ annihilation into 2 gammas
//

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

#ifndef RATeplusAnnihilation_h
#define RATeplusAnnihilation_h

#include "G4VEmProcess.hh"

class G4ParticleDefinition;

class RATeplusAnnihilation : public G4VEmProcess
{

public:

  RATeplusAnnihilation(const G4String& name = "annihil");

  virtual ~RATeplusAnnihilation();

  virtual G4bool IsApplicable(const G4ParticleDefinition& p);

  virtual G4VParticleChange* AtRestDoIt(
                             const G4Track& aTrack,
                             const G4Step& stepData);

  virtual G4double AtRestGetPhysicalInteractionLength(
                             const G4Track& track,
                             G4ForceCondition* condition
                            );

  // Print out of the class parameters
  virtual void PrintInfo();

protected:

  virtual void InitialiseProcess(const G4ParticleDefinition*);

private:

  G4bool  fisInitialised;
  const G4ParticleDefinition* fGamma;
  double fFormfrac;
  double fLifetime;
  bool fRandom;
};

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#endif