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 // $Id: G4VPolarizedCrossSection.hh 69847 2013-05-16 09:36:18Z gcosmo $ 00027 // 00028 // File name: G4VPolarizedCrossSection 00029 // 00030 // Author: Andreas Schaelicke 00031 // 00032 // Creation date: 15.05.2005 00033 // 00034 // Modifications: 00035 // 00036 // Class Description: 00037 // (pure virtual) interface class 00038 // 00039 // provides readable but efficient routines to determine 00040 // polarization for the final state of a given process 00041 // empoying the differential cross section 00042 // 00043 00044 #ifndef G4VPolarizedCrossSection_h 00045 #define G4VPolarizedCrossSection_h 1 00046 00047 #include "G4StokesVector.hh" 00048 00049 00050 class G4VPolarizedCrossSection 00051 { 00052 public: 00053 G4VPolarizedCrossSection(); 00054 virtual ~G4VPolarizedCrossSection(); 00055 00056 public: 00057 virtual void Initialize(G4double, G4double, G4double, 00058 const G4StokesVector & p0,const G4StokesVector & p1, 00059 G4int flag=0); 00060 virtual G4double XSection(const G4StokesVector & pol2,const G4StokesVector & pol3) = 0; 00061 virtual G4double TotalXSection(G4double xmin, G4double xmax, G4double y, 00062 const G4StokesVector & pol0, 00063 const G4StokesVector & pol1); 00064 00065 // return expected mean polarisation 00066 virtual G4StokesVector GetPol2(); 00067 virtual G4StokesVector GetPol3(); 00068 00069 // return basic kinematics properties 00070 // minimal gamma value in TotalXSection 00071 inline G4double GetYmin() {return fYmin; } 00072 // minimal energy fraction in TotalXSection 00073 virtual G4double GetXmin(G4double y); 00074 // maximal energy fraction in TotalXSection 00075 virtual G4double GetXmax(G4double y); 00076 00077 // return appropriate distribute polarisation states; 00078 // void DicePolarization(); 00079 // G4StokesVector DicedPol2(); 00080 // G4StokesVector DicedPol3(); 00081 inline void SetMaterial(G4double A, G4double Z, G4double coul) 00082 { theA=A; theZ=Z; fCoul=coul; } 00083 protected: 00084 // define kinematics properties 00085 inline void SetXmin(G4double xmin) { fXmin=xmin;} 00086 inline void SetXmax(G4double xmax) { fXmax=xmax;} 00087 inline void SetYmin(G4double ymin) { fYmin=ymin;} 00088 00089 // kinematic properties 00090 G4double fXmin, fXmax, fYmin; 00091 // material properties 00092 G4double theA, theZ; 00093 G4double fCoul; 00094 }; 00095 00096 00097 #endif