Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/electromagnetic/standard/include/G4eeToTwoGammaModel.hh

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 25 //
 26 //
 27 // -------------------------------------------------------------------
 28 //
 29 // GEANT4 Class header file
 30 //
 31 //
 32 // File name:     G4eeToTwoGammaModel
 33 //
 34 // Author:        Vladimir Ivanchenko on base of Michel Maire code
 35 //
 36 // Creation date: 02.08.2004
 37 //
 38 // Modifications:
 39 // 08-04-05 Major optimisation of internal interfaces (V.Ivanchenko)
 40 // 18-04-05 Compute CrossSectionPerVolume (V.Ivanchenko)
 41 // 06-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
 42 // 20-10-06 Add theGamma as a member (V.Ivanchenko)
 43 //
 44 //
 45 // Class Description:
 46 //
 47 // Implementation of e+ annihilation into 2 gamma on fly
 48 // Annihilation at rest is sampled by G4VPositronAtRestModel
 49 //
 50 // -------------------------------------------------------------------
 51 //
 52 
 53 #ifndef G4eeToTwoGammaModel_h
 54 #define G4eeToTwoGammaModel_h 1
 55 
 56 #include "G4VEmModel.hh"
 57 #include <vector>
 58 
 59 class G4ParticleChangeForGamma;
 60 
 61 class G4eeToTwoGammaModel : public G4VEmModel
 62 {
 63 
 64 public:
 65 
 66   explicit G4eeToTwoGammaModel(const G4ParticleDefinition* p = nullptr,
 67                                const G4String& nam = "eplus2gg");
 68 
 69   ~G4eeToTwoGammaModel() override;
 70 
 71   void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
 72   
 73   virtual G4double ComputeCrossSectionPerElectron(G4double kinEnergy); 
 74   
 75   G4double ComputeCrossSectionPerAtom(
 76                                  const G4ParticleDefinition*,
 77                                  G4double kinEnergy, 
 78                                  G4double Z, 
 79                                  G4double A = 0., 
 80                                  G4double cutEnergy = 0.,
 81                                  G4double maxEnergy = DBL_MAX) override;
 82 
 83   G4double CrossSectionPerVolume(const G4Material*,
 84          const G4ParticleDefinition*,
 85          G4double kineticEnergy,
 86          G4double cutEnergy = 0.0,
 87          G4double maxEnergy = DBL_MAX) override;
 88 
 89   void SampleSecondaries(std::vector<G4DynamicParticle*>*,
 90          const G4MaterialCutsCouple*,
 91          const G4DynamicParticle*,
 92          G4double tmin,
 93          G4double maxEnergy) override;
 94 
 95   // hide assignment operator
 96   G4eeToTwoGammaModel & operator=(const  G4eeToTwoGammaModel &right) = delete;
 97   G4eeToTwoGammaModel(const  G4eeToTwoGammaModel&) = delete;
 98 
 99 private:
100 
101   G4double pi_rcl2;
102   const G4ParticleDefinition* theGamma;
103   G4ParticleChangeForGamma* fParticleChange;
104 };
105 
106 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
107 
108 #endif
109