G4ModifiedTsai.hh

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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:  G4ModifiedTsai
//
// Author:     Andreia Trindade (andreia@lip.pt)
//             Pedro Rodrigues  (psilva@lip.pt)
//             Luis Peralta     (luis@lip.pt)
// 
// Creation date: 21 March 2003
//
// Modifications: 
// 21 Mar 2003 A.Trindade First implementation acording with new design
// 24 Mar 2003 A.Trindade Fix in Tsai generator in order to prevent theta 
//                        generation above pi
// 13 Oct 2010  V.Ivanchenko  Moved to standard and improved comment
//
// Class Description: 
//
// Bremsstrahlung Angular Distribution Generation 
// suggested by L.Urban (Geant3 manual (1993) Phys211)
// Derived from Tsai distribution (Rev Mod Phys 49,421(1977))
//
// -------------------------------------------------------------------
//
 
#ifndef G4ModifiedTsai_h
#define G4ModifiedTsai_h 1
 
#include "G4ios.hh"
#include "globals.hh"
#include "G4VEmAngularDistribution.hh"
 
class G4ModifiedTsai : public G4VEmAngularDistribution
{
 
public:
 
  explicit G4ModifiedTsai(const G4String& name = "");
 
  ~G4ModifiedTsai() override;
 
  G4ThreeVector& SampleDirection(const G4DynamicParticle* dp,
                 G4double out_energy, G4int Z,
                 const G4Material* mat = nullptr) final;
 
  void SamplePairDirections(const G4DynamicParticle* dp,
                G4double elecKinEnergy,
                G4double posiKinEnergy,
                G4ThreeVector& dirElectron,
                G4ThreeVector& dirPositron,
                G4int Z = 0,
                const G4Material* mat = nullptr) final;
 
  void PrintGeneratorInformation() const final;
 
  // hide assignment operator 
  G4ModifiedTsai & operator=(const  G4ModifiedTsai &right) = delete;
  G4ModifiedTsai(const  G4ModifiedTsai&) = delete;
 
private:
 
  G4double SampleCosTheta(G4double kinEnergy);
 
};
 
#endif