include/Geant4/G4PhotoNuclearCrossSection.hh

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0026 //
0027 // GEANT4 physics class: G4PhotoNuclearCrossSection -- header file
0028 // Created: M.V. Kossov, CERN/ITEP(Moscow), 10-OCT-01
0029 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02
0030
0031 #ifndef G4PhotoNuclearCrossSection_h
0032 #define G4PhotoNuclearCrossSection_h 1
0033
0034 #include "G4VCrossSectionDataSet.hh"
0035 #include "G4DynamicParticle.hh"
0036 #include "G4Element.hh"
0037 #include "G4ParticleTable.hh"
0038 #include "G4NucleiProperties.hh"
0039 #include "G4NistManager.hh"
0040 #include <vector>
0041
0042 class G4PhotoNuclearCrossSection : public G4VCrossSectionDataSet
0043 {
0044 public:
0045
0046     G4PhotoNuclearCrossSection();
0047     virtual ~G4PhotoNuclearCrossSection();
0048
0049     static const char* Default_Name() {return "PhotoNuclearXS";}
0050
0051     virtual void CrossSectionDescription(std::ostream&) const;
0052
0053     virtual G4bool
0054     IsIsoApplicable(const G4DynamicParticle* particle, G4int Z, G4int A,
0055                     const G4Element* elm = 0, const G4Material* mat = 0);
0056
0057     virtual G4bool
0058     IsElementApplicable(const G4DynamicParticle* particle, G4int Z,
0059                         const G4Material*);
0060
0061     virtual G4double
0062     GetIsoCrossSection(const G4DynamicParticle* dynPart,
0063                     G4int Z, G4int A,
0064                     const G4Isotope*,
0065                     const G4Element* elm,
0066                     const G4Material* mat);
0067
0068     virtual G4double
0069     GetElementCrossSection(const G4DynamicParticle*, G4int Z,
0070                            const G4Material*);
0071
0072 private:
0073
0074     G4int GetFunctions(G4double a, G4double* y, G4double* z);
0075     G4double EquLinearFit(G4double X, G4int N, const G4double X0,
0076                           const G4double XD, const G4double* Y);
0077     G4double ThresholdEnergy(G4int Z, G4int N);
0078
0079     // Body
0080 private:
0081
0082     G4int     lastZ = 0;         // The last Z of calculated nucleus
0083     G4double  lastSig = 0.0;     // Last value of the Cross Section
0084     G4double* lastGDR = nullptr; // Pointer to the last array of GDR cross sections
0085     G4double* lastHEN = nullptr; // Pointer to the last array of HEn cross sections
0086     G4double  lastE = 0.0;       // Last used in the cross section Energy
0087     G4double  lastTH = 0.0;      // Last value of the Energy Threshold (A-dependent)
0088     G4double  lastSP = 0.0;      // Last value of the ShadowingPomeron (A-dependent)
0089
0090     // Vector of pointers to the GDRPhotonuclearCrossSection
0091     std::vector <G4double*> GDR;
0092
0093     // store deuteron, triton, He3 XS
0094     G4double* deuteron_GDR = nullptr;
0095     G4double* deuteron_HR = nullptr;
0096     G4double deuteron_TH = 0.0;
0097     G4double deuteron_SP = 0.0;
0098     G4double* triton_GDR = nullptr;
0099     G4double* triton_HR = nullptr;
0100     G4double triton_TH = 0.0;
0101     G4double triton_SP = 0.0;
0102     G4double* he3_GDR = nullptr;
0103     G4double* he3_HR = nullptr;
0104     G4double he3_TH = 0.0;
0105     G4double he3_SP = 0.0;
0106
0107     // Vector of pointers to the HighEnPhotonuclearCrossSect
0108     std::vector <G4double*> HEN;
0109
0110     std::vector <G4double> spA;  // shadowing coefficients (A-dependent)
0111     std::vector <G4double> eTH;    // energy threshold (A-dependent)
0112
0113     G4NistManager* nistmngr;
0114
0115     G4double mNeut;
0116     G4double mProt;
0117 };
0118
0119 #endif