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 // GEANT4 tag $Name: not supported by cvs2svn $ 00027 // 00028 // GEANT4 physics class: G4PhotoNuclearCrossSection -- header file 00029 // Created: M.V. Kossov, CERN/ITEP(Moscow), 10-OCT-01 00030 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02 00031 00032 #ifndef G4PhotoNuclearCrossSection_h 00033 #define G4PhotoNuclearCrossSection_h 1 00034 00035 #include "G4VCrossSectionDataSet.hh" 00036 #include "G4DynamicParticle.hh" 00037 #include "G4Element.hh" 00038 #include "G4ParticleTable.hh" 00039 #include "G4NucleiProperties.hh" 00040 #include <vector> 00041 00042 class G4PhotoNuclearCrossSection : public G4VCrossSectionDataSet 00043 { 00044 public: 00045 00046 G4PhotoNuclearCrossSection(const G4String& name = "PhotoNuclearXS"); 00047 virtual ~G4PhotoNuclearCrossSection(); 00048 00049 virtual void CrossSectionDescription(std::ostream&) const; 00050 00051 virtual G4bool 00052 IsIsoApplicable(const G4DynamicParticle* particle, G4int /*Z*/, G4int /*A*/, 00053 const G4Element*, const G4Material*); 00054 00055 virtual G4double 00056 GetIsoCrossSection(const G4DynamicParticle*, G4int /*Z*/, G4int /*A*/, 00057 const G4Isotope*, const G4Element*, const G4Material*); 00058 00059 private: 00060 00061 G4int GetFunctions(G4double a, G4double* y, G4double* z); 00062 G4double EquLinearFit(G4double X, G4int N, const G4double X0, 00063 const G4double XD, const G4double* Y); 00064 G4double ThresholdEnergy(G4int Z, G4int N); 00065 00066 // Body 00067 private: 00068 00069 static G4int lastN; // The last N of calculated nucleus 00070 static G4int lastZ; // The last Z of calculated nucleus 00071 static G4double lastSig; // Last value of the Cross Section 00072 static G4double* lastGDR; // Pointer to the last array of GDR cross sections 00073 static G4double* lastHEN; // Pointer to the last array of HEn cross sections 00074 static G4double lastE; // Last used in the cross section Energy 00075 static G4double lastTH; // Last value of the Energy Threshold (A-dependent) 00076 static G4double lastSP; // Last value of the ShadowingPomeron (A-dependent) 00077 00078 // Vector of pointers to the GDRPhotonuclearCrossSection 00079 static std::vector <G4double*> GDR; 00080 00081 // Vector of pointers to the HighEnPhotonuclearCrossSect 00082 static std::vector <G4double*> HEN; 00083 }; 00084 00085 #endif