G4eeToTwoGammaModel.hh

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00001 //
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00025 //
00026 // $Id$
00027 //
00028 // -------------------------------------------------------------------
00029 //
00030 // GEANT4 Class header file
00031 //
00032 //
00033 // File name:     G4eeToTwoGammaModel
00034 //
00035 // Author:        Vladimir Ivanchenko on base of Michel Maire code
00036 //
00037 // Creation date: 02.08.2004
00038 //
00039 // Modifications:
00040 // 08-04-05 Major optimisation of internal interfaces (V.Ivanchenko)
00041 // 18-04-05 Compute CrossSectionPerVolume (V.Ivanchenko)
00042 // 06-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
00043 // 20-10-06 Add theGamma as a member (V.Ivanchenko)
00044 //
00045 //
00046 // Class Description:
00047 //
00048 // Implementation of e+ annihilation into 2 gamma
00049 
00050 // -------------------------------------------------------------------
00051 //
00052 
00053 #ifndef G4eeToTwoGammaModel_h
00054 #define G4eeToTwoGammaModel_h 1
00055 
00056 #include "G4VEmModel.hh"
00057 
00058 class G4ParticleChangeForGamma;
00059 
00060 class G4eeToTwoGammaModel : public G4VEmModel
00061 {
00062 
00063 public:
00064 
00065   G4eeToTwoGammaModel(const G4ParticleDefinition* p = 0,
00066                       const G4String& nam = "eplus2gg");
00067 
00068   virtual ~G4eeToTwoGammaModel();
00069 
00070   virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
00071   
00072   virtual G4double ComputeCrossSectionPerElectron(
00073                                 const G4ParticleDefinition*,
00074                                       G4double kinEnergy, 
00075                                       G4double cutEnergy = 0.,
00076                                       G4double maxEnergy = DBL_MAX);
00077   
00078   virtual G4double ComputeCrossSectionPerAtom(
00079                                 const G4ParticleDefinition*,
00080                                       G4double kinEnergy, 
00081                                       G4double Z, 
00082                                       G4double A = 0., 
00083                                       G4double cutEnergy = 0.,
00084                                       G4double maxEnergy = DBL_MAX);
00085 
00086   virtual G4double CrossSectionPerVolume(const G4Material*,
00087                                          const G4ParticleDefinition*,
00088                                          G4double kineticEnergy,
00089                                          G4double cutEnergy,
00090                                          G4double maxEnergy);
00091 
00092   virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
00093                                  const G4MaterialCutsCouple*,
00094                                  const G4DynamicParticle*,
00095                                  G4double tmin,
00096                                  G4double maxEnergy);
00097 
00098 private:
00099 
00100   // hide assignment operator
00101   G4eeToTwoGammaModel & operator=(const  G4eeToTwoGammaModel &right);
00102   G4eeToTwoGammaModel(const  G4eeToTwoGammaModel&);
00103 
00104   G4double pi_rcl2;
00105   G4ParticleDefinition*  theGamma;
00106   G4ParticleChangeForGamma* fParticleChange;
00107   G4bool isInitialised;
00108 };
00109 
00110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
00111 
00112 #endif

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