G4LivermorePolarizedGammaConversionModel.hh

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// Authors: G.Depaola & F.Longo
//
 
#ifndef G4LivermorePolarizedGammaConversionModel_h
#define G4LivermorePolarizedGammaConversionModel_h 1
 
#include "G4VEmModel.hh"
#include "G4PhysicsFreeVector.hh"
 
class G4ParticleChangeForGamma;
 
class G4LivermorePolarizedGammaConversionModel : public G4VEmModel
{
public:
 
  explicit G4LivermorePolarizedGammaConversionModel(const G4ParticleDefinition* p = nullptr, 
                         const G4String& nam = "LivermorePolarizedGammaConversion");
  virtual ~G4LivermorePolarizedGammaConversionModel();
  
  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;
  
  G4double MinPrimaryEnergy(const G4Material*,
                const G4ParticleDefinition*,
                G4double) override;  
 
  G4LivermorePolarizedGammaConversionModel & operator=(const  G4LivermorePolarizedGammaConversionModel &right) = delete;
  G4LivermorePolarizedGammaConversionModel(const  G4LivermorePolarizedGammaConversionModel&) = delete;
 
private:
  void ReadData(size_t Z, const char* path = 0);
  
  G4double ScreenFunction1(G4double screenVariable);
  G4double ScreenFunction2(G4double screenVariable);
  
  // specific methods for polarization 
  G4ThreeVector GetRandomPolarization(G4ThreeVector& direction0); // Random Polarization
  G4ThreeVector GetPerpendicularPolarization(const G4ThreeVector& direction0, const G4ThreeVector& polarization0) const;
  G4ThreeVector SetPerpendicularVector(G4ThreeVector& a); // temporary
  void SystemOfRefChange(G4ThreeVector& direction0, G4ThreeVector& direction1, 
             G4ThreeVector& polarization0);
 
  // Gamma Conversion methods 
  G4double SetPhi(G4double);
  G4double SetPsi(G4double, G4double); //
 
  void SetTheta(G4double*, G4double*, G4double);
 
  G4double Poli(G4double , G4double, G4double, G4double);
  G4double Fln(G4double, G4double, G4double);
 
  G4double Encu(G4double*, G4double*, G4double);
 
  G4double Flor(G4double*, G4double);
  G4double Glor(G4double*, G4double);
 
  G4double Fdlor(G4double*, G4double);
  G4double Fintlor(G4double*, G4double);
  G4double Finvlor(G4double*, G4double,G4double);
 
  G4double Ftan(G4double*, G4double);
  G4double Fdtan(G4double*, G4double);
  G4double Finttan(G4double*, G4double);
  G4double Finvtan(G4double*, G4double, G4double);
 
 
  G4ParticleChangeForGamma* fParticleChange;
 
  static const G4int maxZ = 99;
  static G4PhysicsFreeVector* data[100]; // 100 because Z range is 1-99
 
  G4double lowEnergyLimit;  
  G4double smallEnergy;
  G4double Psi, Phi;
  G4int verboseLevel;
  G4bool isInitialised;
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#endif