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     ~G4PhotoNuclearCrossSection() override;
0048
0049     static const char* Default_Name() {return "PhotoNuclearXS";}
0050
0051     void CrossSectionDescription(std::ostream&) const override;
0052
0053     G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
0054                            const G4Element* elm = nullptr,
0055                const G4Material* mat = nullptr) override;
0056
0057     G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z,
0058                                const G4Material* mat = nullptr) override;
0059
0060     G4double GetIsoCrossSection(const G4DynamicParticle*,
0061                                 G4int Z, G4int A,
0062                                 const G4Isotope* iso = nullptr,
0063                                 const G4Element* elm = nullptr,
0064                                 const G4Material* mat = nullptr) override;
0065
0066     G4double GetElementCrossSection(const G4DynamicParticle*, G4int Z,
0067                                     const G4Material*) override;
0068
0069     G4double ComputeElementXSection(G4double energy, G4int Z);
0070
0071     G4double ComputeIsoXSection(G4double energy, G4int Z, G4int A);
0072
0073     G4PhotoNuclearCrossSection& operator=
0074     (const G4PhotoNuclearCrossSection& right) = delete;
0075     G4PhotoNuclearCrossSection(const G4PhotoNuclearCrossSection&) = delete;
0076
0077 private:
0078
0079     G4int GetFunctions(G4double a, G4double* y, G4double* z);
0080     G4double EquLinearFit(G4double X, G4int N, const G4double X0,
0081                           const G4double XD, const G4double* Y);
0082     G4double ThresholdEnergy(G4int Z, G4int N);
0083
0084     G4int     lastZ = 0;         // The last Z of calculated nucleus
0085     G4double  lastSig = 0.0;     // Last value of the Cross Section
0086     G4double* lastGDR = nullptr; // Pointer to the last array of GDR cross sections
0087     G4double* lastHEN = nullptr; // Pointer to the last array of HEn cross sections
0088     G4double  lastE = 0.0;       // Last used in the cross section Energy
0089     G4double  lastTH = 0.0;      // Last value of the Energy Threshold (A-dependent)
0090     G4double  lastSP = 0.0;      // Last value of the ShadowingPomeron (A-dependent)
0091
0092     // Vector of pointers to the GDRPhotonuclearCrossSection
0093     std::vector <G4double*> GDR;
0094
0095     // store deuteron, triton, He3 XS
0096     G4double* deuteron_GDR = nullptr;
0097     G4double* deuteron_HR = nullptr;
0098     G4double deuteron_TH = 0.0;
0099     G4double deuteron_SP = 0.0;
0100     G4double* triton_GDR = nullptr;
0101     G4double* triton_HR = nullptr;
0102     G4double triton_TH = 0.0;
0103     G4double triton_SP = 0.0;
0104     G4double* he3_GDR = nullptr;
0105     G4double* he3_HR = nullptr;
0106     G4double he3_TH = 0.0;
0107     G4double he3_SP = 0.0;
0108
0109     // Vector of pointers to the HighEnPhotonuclearCrossSect
0110     std::vector <G4double*> HEN;
0111
0112     std::vector <G4double> spA;  // shadowing coefficients (A-dependent)
0113     std::vector <G4double> eTH;    // energy threshold (A-dependent)
0114
0115     G4NistManager* nistmngr;
0116
0117     G4double mNeut;
0118     G4double mProt;
0119 };
0120
0121 #endif