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 // INCL++ intra-nuclear cascade model 00027 // Pekka Kaitaniemi, CEA and Helsinki Institute of Physics 00028 // Davide Mancusi, CEA 00029 // Alain Boudard, CEA 00030 // Sylvie Leray, CEA 00031 // Joseph Cugnon, University of Liege 00032 // 00033 #define INCLXX_IN_GEANT4_MODE 1 00034 00035 #include "globals.hh" 00036 00047 #ifndef G4INCLDEJONGSPIN_HH_ 00048 #define G4INCLDEJONGSPIN_HH_ 00049 00050 #include "G4INCLGlobals.hh" 00051 #include "G4INCLRandom.hh" 00052 00053 namespace G4INCL { 00054 class DeJongSpin { 00055 public: 00056 static ThreeVector shoot(const G4int Ap, const G4int Af) { 00057 return Random::gaussVector(getSpinCutoffParameter(Ap, Af)); 00058 } 00059 00060 private: 00061 static G4double getSpinCutoffParameter(const G4int Ap, const G4int Af) { 00062 const G4double jz2 = jzFactor * Math::pow23((G4double) Ap); // No deformation assumed 00063 const G4double sigma = jz2 * Af*(Ap-Af)/((G4double)(Ap-1)); 00064 return std::sqrt(sigma); 00065 } 00066 00067 const static G4double jzFactor; 00068 00069 DeJongSpin() {} 00070 ~DeJongSpin() {} 00071 00072 }; 00073 } 00074 00075 #endif // G4INCLDEJONGSPIN_HH_