G4QNuNuNuclearCrossSection.hh

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00027 // $Id$
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00029 //
00030 // GEANT4 physics class: G4QNuNuNuclearCrossSection -- header file
00031 // M.V. Kossov, CERN-ITEP(Moscow), 20-DEC-2005
00032 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 20-DEC-2005
00033 //
00034 // Short description: this G4 singletone class calculates (nu,nu) Nuclear cross section
00035 // (Energy limit: E<320GeV->badExtrapolation) for a particular isotope (proportional to A)
00036 // ****************************************************************************************
00037 
00038 #ifndef G4QNuNuNuclearCrossSection_h
00039 #define G4QNuNuNuclearCrossSection_h 1
00040 
00041 #include "G4ParticleTable.hh"
00042 #include "G4NucleiProperties.hh"
00043 #include <vector>
00044 #include "Randomize.hh"
00045 #include "G4MuonPlus.hh"
00046 #include "G4MuonMinus.hh"
00047 #include "G4VQCrossSection.hh"
00048 
00049 class G4QNuNuNuclearCrossSection : public G4VQCrossSection
00050 {
00051 protected:
00052 
00053   G4QNuNuNuclearCrossSection()  {};
00054 
00055 public:
00056 
00057   ~G4QNuNuNuclearCrossSection();
00058 
00059   static G4VQCrossSection* GetPointer(); // Gives a pointer to this singletone
00060 
00061   G4double ThresholdEnergy(G4int Z, G4int N, G4int PDG=14);
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,
00068                                                                G4int N, G4double Momentum);
00069 
00070   G4int    GetExchangePDGCode();
00071 
00072   G4double GetDirectPart(G4double Q2);
00073 
00074   G4double GetNPartons(G4double Q2);
00075 
00076   G4double GetQEL_ExchangeQ2();
00077 
00078   G4double GetNQE_ExchangeQ2();
00079 
00080   // Get static members
00081   G4double GetLastTOTCS() {return lastSig;}
00082   G4double GetLastQELCS() {return lastQEL;}
00083 
00084 private:
00085   G4int    GetFunctions(G4int z, G4int n, G4double* t, G4double* q, G4double* e);
00086   G4double HighEnergyTX(G4double lE);
00087   G4double HighEnergyQE(G4double lE);
00088 
00089 // Body
00090 private:
00091   static G4bool    onlyCS;   // flag to calculate only CS (not TX & QE)
00092   static G4double  lastSig;  // Last calculated total cross section
00093   static G4double  lastQEL;  // Last calculated quasi-elastic cross section
00094   static G4int     lastL;    // Last bin used in the cross section TheLastBin
00095   static G4double  lastE;    // Last energy used in the cross section Energy
00096   static G4double* lastEN;   // Pointer to the last array of the energy axis
00097   static G4double* lastTX;   // Pointer to the last array of the total CS function
00098   static G4double* lastQE;   // Pointer to the last array of the QE CS function
00099   static G4int     lastPDG;  // The last projectile PDG
00100   static G4int     lastN;    // The last N of calculated nucleus
00101   static G4int     lastZ;    // The last Z of calculated nucleus
00102   static G4double  lastP;    // Last used in the cross section Momentum
00103   static G4double  lastTH;   // Last value of the Momentum Threshold
00104   static G4double  lastCS;   // Last value of the Cross Section
00105   static G4int     lastI;    // The last position in the DAMDB
00106   static std::vector <G4double*>* TX; // Vector of pointers to the TX tabulated functions
00107   static std::vector <G4double*>* QE; // Vector of pointers to the QE tabulated functions
00108 };
00109 
00110 #endif

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