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 // 00027 // GEANT4 tag $Name: not supported by cvs2svn $ 00028 // 00029 // 00030 // GEANT4 physics class: G4QPhotonNuclearCrossSection -- header file 00031 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20-Dec-01 00032 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02 00033 // 00034 // **************************************************************************************** 00035 // ********* This HEADER is temporary moved from the photolepton_hadron directory ********* 00036 // ******* DO NOT MAKE ANY CHANGE! With time it'll move back to photolepton...(M.K.) ****** 00037 // **************************************************************************************** 00038 // Short description: This is an original CHIPS process for photo-nuclear 00039 // interactions, which does not include "fast and dirty" corrections for 00040 // reactions near threshold, with respect to the GHAD application of CHIPS. 00041 // ------------------------------------------------------------------------ 00042 00043 #ifndef G4QPhotonNuclearCrossSection_h 00044 #define G4QPhotonNuclearCrossSection_h 1 00045 00046 #include "G4ParticleTable.hh" 00047 #include "G4NucleiProperties.hh" 00048 #include <vector> 00049 #include "G4VQCrossSection.hh" 00050 00051 class G4QPhotonNuclearCrossSection : public G4VQCrossSection 00052 { 00053 protected: 00054 00055 G4QPhotonNuclearCrossSection() {} 00056 00057 public: 00058 00059 ~G4QPhotonNuclearCrossSection(); 00060 00061 static G4VQCrossSection* GetPointer(); // Gives a pointer to this singletone 00062 00063 // At present momentum (pMom) must be in GeV (@@ Units) 00064 virtual G4double GetCrossSection(G4bool fCS, G4double pMom, G4int tgZ, G4int tgN, 00065 G4int pPDG=0); 00066 00067 G4double CalculateCrossSection(G4bool CS, G4int F, G4int I, G4int PDG, G4int Z, G4int N, 00068 G4double Momentum); 00069 00070 G4double ThresholdEnergy(G4int Z, G4int N, G4int PDG=22); 00071 00072 private: 00073 G4int GetFunctions(G4double A, G4double* y, G4double* z);// y&z are pointers to arrays 00074 00075 // Body 00076 private: 00077 static G4bool onlyCS; // flag to calculate only CrossSection 00078 static G4double lastSig; // Last value of the Cross Section 00079 static G4double* lastGDR; // Pointer to the last array of GDR cross sections 00080 static G4double* lastHEN; // Pointer to the last array of HEn cross sections 00081 static G4double lastE; // Last used in the cross section Energy 00082 static G4double lastSP; // Last value of the ShadowingPomeron (A-dependent) 00083 static G4int lastPDG; // The last projectile PDG 00084 static G4int lastN; // The last N of calculated nucleus 00085 static G4int lastZ; // The last Z of calculated nucleus 00086 static G4double lastP; // Last used in the cross section Momentum 00087 static G4double lastTH; // Last value of the Momentum Threshold 00088 static G4double lastCS; // Last value of the Cross Section 00089 static G4int lastI; // The last position in the DAMDB 00090 static std::vector <G4double*>* GDR; // Vector of pointers to GDRPhotonuclearCrossSection 00091 static std::vector <G4double*>* HEN; // Vector of pointers to HighEnPhotonuclearCrossSect 00092 }; 00093 00094 #endif