G4BetaFermiFunction Class Reference

#include <G4BetaFermiFunction.hh>


Public Member Functions

 G4BetaFermiFunction (G4int const fA, G4int const fZ)
 ~G4BetaFermiFunction ()
G4double GetFF (const G4double E)
G4double GetFFN (const G4double E0)

Detailed Description

Definition at line 31 of file G4BetaFermiFunction.hh.

Constructor & Destructor Documentation

G4BetaFermiFunction::G4BetaFermiFunction ( G4int const   fA,
G4int const   fZ 
) [inline]

Definition at line 39 of file G4BetaFermiFunction.hh.

00039                                                       :
00040     A(fA), Z(fZ)
00041   {};
  // constructor: fA the daughter nucleus mass.

G4BetaFermiFunction::~G4BetaFermiFunction (  )  [inline]

Definition at line 46 of file G4BetaFermiFunction.hh.

00049   {};

Member Function Documentation

G4double G4BetaFermiFunction::GetFF ( const G4double  E  ) 

Definition at line 36 of file G4BetaFermiFunction.cc.

00037 {
00038   G4double A1, A2;
00039   G4double P, U, S, Y;
00040   G4double F2;
00041   G4double E = E0+1.;  
00042   P=std::sqrt(E*E-1.0) ;
00043   U=Z/137.0;
00044   S=std::sqrt(1.0-U*U) - 1.;
00045   Y = 2*PI*U*E/P;
00046   A1 = U*U*E*E + P*P/4.;
00047   A2 = std::fabs(Y/(1-std::exp(-Y)));
00048   F2 = std::pow(A1,S) * A2; 
00049   return F2;
00050 }

G4double G4BetaFermiFunction::GetFFN ( const G4double  E0  ) 

Definition at line 57 of file G4BetaFermiFunction.cc.

00058 {
00059 
00060   G4double A1, A2;
00061   G4double P, U, S, Y;
00062   G4double F2,E;
00063   G4double EE = E0/100.;
00064   U=Z/137.0;
00065   S=std::sqrt(1.0-U*U) - 1.;
00066   G4double F1 = 1E-10;
00067   for (G4int i = 1; i<=100 ; i++) {
00068     E = G4double(i)*EE + 1.;
00069     P=std::sqrt(E*E-1.0) ;
00070     Y = 2*PI*U*E/P;
00071     A1 = U*U*E*E + P*P/4.;
00072     A2 = std::fabs(Y/(1-std::exp(-Y)));
00073     F2 = std::pow(A1,S) * A2; 
00074     if (F2 > F1) F1 = F2;
00075   }                
00076   return F1;
00077 }

The documentation for this class was generated from the following files:
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