00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 #ifndef G4BetaFermiFunction_h 00027 #define G4BetaFermiFunction_h 1 00028 00029 #include "globals.hh" 00030 00031 class G4BetaFermiFunction 00032 { 00033 // class description 00034 // It is to calculate the Coulomb correction to beta particles 00035 // 00036 00037 public: // with description 00038 00039 G4BetaFermiFunction(G4int const fA, G4int const fZ) : 00040 A(fA), Z(fZ) 00041 {}; 00042 // constructor: fA the daughter nucleus mass. 00043 // fZ the daughter nucleus charge. Negative value for 00044 // beta+ decays. 00045 // 00046 ~G4BetaFermiFunction() 00047 // desctructor 00048 // 00049 {}; 00050 G4double GetFF(const G4double E); 00051 // Returns the BetaFermi factor at energy E. 00052 // E kinetic energy of the beta particle in unit of Me. 00053 // 00054 G4double GetFFN(const G4double E0); 00055 // Returns the BetaFermi factor normalisation, i.e. the maximum 00056 // value for beta decay with end-point energy E0. 00057 // E0 dose not including beta particle rest mass in unit 00058 // of Me. 00059 // 00060 private: 00061 00062 G4int A; 00063 G4int Z; 00064 00065 static const G4double PI; 00066 00067 private: 00068 00069 G4double Gamma(G4double X); 00070 00071 }; 00072 #endif 00073 00074 00075 00076 00077 00078 00079 00080 00081 00082 00083 00084 00085 00086