G4LivermorePolarizedRayleighModel.hh

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//
// Author: Sebastien Incerti
//         30 October 2008
//         on base of G4LowEnergyPolarizedRayleigh developed by R. Capra
//
 
#ifndef G4LivermorePolarizedRayleighModel_h
#define G4LivermorePolarizedRayleighModel_h 1
 
#include "G4VEmModel.hh"
#include "G4ParticleChangeForGamma.hh"
#include "G4PhysicsFreeVector.hh"
#include "G4ProductionCutsTable.hh"
 
class G4LivermorePolarizedRayleighModel : public G4VEmModel
{
public:
 
  explicit G4LivermorePolarizedRayleighModel(
                      const G4ParticleDefinition* p = nullptr, 
              const G4String& nam = "LivermorePolarizedRayleigh");
 
  virtual ~G4LivermorePolarizedRayleighModel();
 
  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
  void InitialiseLocal(const G4ParticleDefinition*, 
                   G4VEmModel* masterModel) override;
  void InitialiseForElement(const G4ParticleDefinition*, G4int Z) override;
  
  G4double ComputeCrossSectionPerAtom(
                      const G4ParticleDefinition*,
                      G4double kinEnergy, 
                      G4double Z, 
                      G4double A=0, 
                      G4double cut=0,
                      G4double emax=DBL_MAX) override;
  
  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
             const G4MaterialCutsCouple*,
             const G4DynamicParticle*,
             G4double tmin,
             G4double maxEnergy) override;
 
  G4LivermorePolarizedRayleighModel & operator=
  (const  G4LivermorePolarizedRayleighModel &right) = delete;
  G4LivermorePolarizedRayleighModel(const  G4LivermorePolarizedRayleighModel&) = delete;
 
private:
  //cross sections
  void ReadData(size_t Z, const char* path = nullptr);
 
  // Polarization   
  //   Generates \f$cos \left ( \theta\right )\f$ of the scattered photon
  //   incomingPhotonEnergy The energy of the incoming photon
  //   zAtom Atomic number
  //   \f$cos \left ( \theta\right )\f$
  G4double GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const;
   
  //   Generates \f$\phi\f$ of the scattered photon
  //   cosTheta \f$cos \left ( \theta\right )\f$ of the scattered photon
  //    \f$\phi\f$
  G4double GeneratePhi(G4double cosTheta) const;
 
  //   Generates the polarization direction \f$\beta\f$ in the plane x, y relative to the x direction
  //   \f$\beta\f$
  G4double GeneratePolarizationAngle(void) const;
  G4ThreeVector GetPhotonPolarization(const G4DynamicParticle&  photon);
 
  G4ParticleChangeForGamma* fParticleChange;
 
  const G4int maxZ = 100;
  static G4PhysicsFreeVector* dataCS[101];
  static G4PhysicsFreeVector* formFactorData[101];
 
  G4double lowEnergyLimit;  
  G4int verboseLevel;
  G4bool isInitialised;
};
 
#endif