include/Geant4/G4LivermorePolarizedRayleighModel.hh

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0025 //
0026 //
0027 // Author: Sebastien Incerti
0028 //         30 October 2008
0029 //         on base of G4LowEnergyPolarizedRayleigh developed by R. Capra
0030 //
0031
0032 #ifndef G4LivermorePolarizedRayleighModel_h
0033 #define G4LivermorePolarizedRayleighModel_h 1
0034
0035 #include "G4VEmModel.hh"
0036 #include "G4ParticleChangeForGamma.hh"
0037 #include "G4PhysicsFreeVector.hh"
0038 #include "G4ProductionCutsTable.hh"
0039
0040 class G4LivermorePolarizedRayleighModel : public G4VEmModel
0041 {
0042 public:
0043
0044   explicit G4LivermorePolarizedRayleighModel(
0045                       const G4ParticleDefinition* p = nullptr,
0046               const G4String& nam = "LivermorePolarizedRayleigh");
0047
0048   virtual ~G4LivermorePolarizedRayleighModel();
0049
0050   void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
0051   void InitialiseLocal(const G4ParticleDefinition*,
0052                    G4VEmModel* masterModel) override;
0053   void InitialiseForElement(const G4ParticleDefinition*, G4int Z) override;
0054
0055   G4double ComputeCrossSectionPerAtom(
0056                       const G4ParticleDefinition*,
0057                       G4double kinEnergy,
0058                       G4double Z,
0059                       G4double A=0,
0060                       G4double cut=0,
0061                       G4double emax=DBL_MAX) override;
0062
0063   void SampleSecondaries(std::vector<G4DynamicParticle*>*,
0064              const G4MaterialCutsCouple*,
0065              const G4DynamicParticle*,
0066              G4double tmin,
0067              G4double maxEnergy) override;
0068
0069   G4LivermorePolarizedRayleighModel & operator=
0070   (const  G4LivermorePolarizedRayleighModel &right) = delete;
0071   G4LivermorePolarizedRayleighModel(const  G4LivermorePolarizedRayleighModel&) = delete;
0072
0073 private:
0074   //cross sections
0075   void ReadData(size_t Z, const char* path = nullptr);
0076
0077   // Polarization
0078   //   Generates \f$cos \left ( \theta\right )\f$ of the scattered photon
0079   //   incomingPhotonEnergy The energy of the incoming photon
0080   //   zAtom Atomic number
0081   //   \f$cos \left ( \theta\right )\f$
0082   G4double GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const;
0083
0084   //   Generates \f$\phi\f$ of the scattered photon
0085   //   cosTheta \f$cos \left ( \theta\right )\f$ of the scattered photon
0086   //    \f$\phi\f$
0087   G4double GeneratePhi(G4double cosTheta) const;
0088
0089   //   Generates the polarization direction \f$\beta\f$ in the plane x, y relative to the x direction
0090   //   \f$\beta\f$
0091   G4double GeneratePolarizationAngle(void) const;
0092   G4ThreeVector GetPhotonPolarization(const G4DynamicParticle&  photon);
0093
0094   G4ParticleChangeForGamma* fParticleChange;
0095
0096   const G4int maxZ = 100;
0097   static G4PhysicsFreeVector* dataCS[101];
0098   static G4PhysicsFreeVector* formFactorData[101];
0099
0100   G4double lowEnergyLimit;
0101   G4int verboseLevel;
0102   G4bool isInitialised;
0103 };
0104
0105 #endif