include/Geant4/G4ParamExpTwoBodyAngDst.hh

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0025 //
0026 // Author:  Michael Kelsey (SLAC)
0027 // Date:    20 February 2013
0028 //
0029 // Description: Templated base class for exponential parametrization of
0030 //               two-body angular distributions in Bertini-style cascade
0031 //
0032 // 20130227  Renamed from "ParamExp" to "ParamExp" to fix misattribution.
0033
0034 #ifndef G4ParamExpTwoBodyAngDst_h
0035 #define G4ParamExpTwoBodyAngDst_h 1
0036
0037 #include "G4VTwoBodyAngDst.hh"
0038 #include "G4CascadeInterpolator.hh"
0039
0040
0041 template <G4int NKEBINS>
0042 class G4ParamExpTwoBodyAngDst : public G4VTwoBodyAngDst {
0043 public:
0044   enum { nKEbins=NKEBINS }; // For use in function arguments
0045
0046   G4ParamExpTwoBodyAngDst(const G4String& name,
0047                  const G4double (&kebins)[nKEbins],
0048                  const G4double (&pFrac)[nKEbins],
0049                  const G4double (&pA)[nKEbins],
0050                  const G4double (&pC)[nKEbins],
0051                  const G4double (&pCos)[nKEbins],
0052                  G4int verbose = 0)
0053     : G4VTwoBodyAngDst(name, verbose), labKE(kebins), angleCut(pFrac),
0054       smallScale(pA), largeScale(pC), cosScale(pCos), interpolator(kebins) {;}
0055
0056   virtual ~G4ParamExpTwoBodyAngDst() {;}
0057
0058   virtual G4double GetCosTheta(const G4double& ekin, const G4double& pcm) const;
0059
0060 protected:
0061   // Kinetic energies at which angular distributions are taken
0062   const G4double (&labKE)[nKEbins];
0063
0064   // Cut-off for small- vs. large-angle functions at each energy
0065   const G4double (&angleCut)[nKEbins];
0066
0067   // Scale factors for small- vs. large-angle regions
0068   const G4double (&smallScale)[nKEbins];
0069   const G4double (&largeScale)[nKEbins];
0070
0071   // Scale factor for exponential mapping to cos(theta)
0072   const G4double (&cosScale)[nKEbins];
0073
0074   G4CascadeInterpolator<NKEBINS> interpolator;
0075 };
0076
0077 // Implementations must be included for templated classes
0078 #include "G4ParamExpTwoBodyAngDst.icc"
0079
0080 #endif  /* G4ParamExpTwoBodyAngDst_h */