G4LivermorePolarizedGammaConversionModel.hh

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// $Id$
//
// Authors: G.Depaola & F.Longo
//
 
#ifndef G4LivermorePolarizedGammaConversionModel_h
#define G4LivermorePolarizedGammaConversionModel_h 1
 
#include "G4VEmModel.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4ParticleChangeForGamma.hh"
#include "G4CrossSectionHandler.hh"
#include "G4LogLogInterpolation.hh"
#include "G4CompositeEMDataSet.hh"
#include "G4ProductionCutsTable.hh"
#include "G4ForceCondition.hh"
 
 
class G4LivermorePolarizedGammaConversionModel : public G4VEmModel
{
 
public:
 
  G4LivermorePolarizedGammaConversionModel(const G4ParticleDefinition* p = 0, 
                           const G4String& nam = "LivermorePolarizedGammaConversion");
 
  virtual ~G4LivermorePolarizedGammaConversionModel();
 
  virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
 
  virtual G4double ComputeCrossSectionPerAtom(
                                const G4ParticleDefinition*,
                                      G4double kinEnergy, 
                                      G4double Z, 
                                      G4double A=0, 
                                      G4double cut=0,
                                      G4double emax=DBL_MAX);
 
  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                 const G4MaterialCutsCouple*,
                 const G4DynamicParticle*,
                 G4double tmin,
                 G4double maxEnergy);
 
protected:
 
  G4ParticleChangeForGamma* fParticleChange;
 
  G4double GetMeanFreePath(const G4Track& aTrack, 
               G4double previousStepSize, 
               G4ForceCondition* condition);
private:
 
  G4double lowEnergyLimit;  
  G4double highEnergyLimit; 
  G4bool isInitialised;
  G4int verboseLevel;
 
  G4VEMDataSet* meanFreePathTable;
  G4VCrossSectionHandler* crossSectionHandler;
 
 
  // 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); //
 
  G4double ScreenFunction1(G4double screenVariable);
  G4double ScreenFunction2(G4double screenVariable);
  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 Gtan(G4double*, G4double);
 
  G4double Fdtan(G4double*, G4double);
  G4double Finttan(G4double*, G4double);
  G4double Finvtan(G4double*, G4double, G4double);
 
  G4double smallEnergy;
  G4double Psi, Phi;
 
  
  G4LivermorePolarizedGammaConversionModel & operator=(const  G4LivermorePolarizedGammaConversionModel &right);
  G4LivermorePolarizedGammaConversionModel(const  G4LivermorePolarizedGammaConversionModel&);
 
};
 
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#endif