G4PolarizedMollerCrossSection.hh

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00026 // $Id: G4PolarizedMollerCrossSection.hh 69847 2013-05-16 09:36:18Z gcosmo $
00027 //
00028 // GEANT4 Class file
00029 //  
00030 //
00031 // File name:     G4PolarizedMollerCrossSection
00032 //
00033 // Author:        Andreas Schaelicke
00034 //
00035 // Creation date: 12.01.2006
00036 //
00037 // Modifications:
00038 //   16-01-06 included cross section as calculated by P.Starovoitov
00039 //
00040 // Class Description:
00041 //   * calculates the differential cross section
00042 //     incomming electron (along positive z direction) scatters at an electron at rest
00043 //   * phi denotes the angle between the scattering plane (defined by the
00044 //     outgoing electron) and X-axis
00045 //   * all stokes vectors refer to spins in the Global System (X,Y,Z)
00046 //
00047 #ifndef G4PolarizedMollerCrossSection_h
00048 #define G4PolarizedMollerCrossSection_h 1
00049 
00050 #include "G4StokesVector.hh"
00051 #include "G4VPolarizedCrossSection.hh"
00052 
00053 class G4PolarizedMollerCrossSection : public G4VPolarizedCrossSection
00054 {
00055 public:
00056   G4PolarizedMollerCrossSection();
00057   virtual ~G4PolarizedMollerCrossSection();
00058 public:
00059   void Initialize(G4double x, G4double y, G4double phi,
00060                   const G4StokesVector & p0,const G4StokesVector & p1,
00061                   G4int flag=0);
00062 
00063   G4double XSection(const G4StokesVector & pol2,const G4StokesVector & pol3);
00064   G4double TotalXSection(G4double xmin, G4double xmax, G4double y,
00065                          const G4StokesVector & pol0,const G4StokesVector & pol1);
00066   // return expected mean polarisation
00067   G4StokesVector GetPol2();
00068   G4StokesVector GetPol3();
00069 private:
00070   G4double phi0;
00071   // - part depending on the polarization of the final electron P1
00072   G4ThreeVector phi2;
00073   // - part depending on the polarization of the final electron P2
00074   G4ThreeVector phi3;
00075 
00076 };
00077 #endif

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