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26 //
27 // GEANT4 physics class: G4PhotoNuclearCrossSection -- header file
28 // Created: M.V. Kossov, CERN/ITEP(Moscow), 10-OCT-01
29 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02
30
31 #ifndef G4PhotoNuclearCrossSection_h
32 #define G4PhotoNuclearCrossSection_h 1
33
34 #include "G4VCrossSectionDataSet.hh"
35 #include "G4DynamicParticle.hh"
36 #include "G4Element.hh"
37 #include "G4ParticleTable.hh"
38 #include "G4NucleiProperties.hh"
39 #include "G4NistManager.hh"
40 #include <vector>
41
42 class G4PhotoNuclearCrossSection : public G4VCrossSectionDataSet
43 {
44 public:
45
46 G4PhotoNuclearCrossSection();
47 ~G4PhotoNuclearCrossSection() override;
48
49 static const char* Default_Name() {return "PhotoNuclearXS";}
50
51 void CrossSectionDescription(std::ostream&) const override;
52
53 G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
54 const G4Element* elm = nullptr,
55 const G4Material* mat = nullptr) override;
56
57 G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z,
58 const G4Material* mat = nullptr) override;
59
60 G4double GetIsoCrossSection(const G4DynamicParticle*,
61 G4int Z, G4int A,
62 const G4Isotope* iso = nullptr,
63 const G4Element* elm = nullptr,
64 const G4Material* mat = nullptr) override;
65
66 G4double GetElementCrossSection(const G4DynamicParticle*, G4int Z,
67 const G4Material*) override;
68
69 G4double ComputeElementXSection(G4double energy, G4int Z);
70
71 G4double ComputeIsoXSection(G4double energy, G4int Z, G4int A);
72
73 G4PhotoNuclearCrossSection& operator=
74 (const G4PhotoNuclearCrossSection& right) = delete;
75 G4PhotoNuclearCrossSection(const G4PhotoNuclearCrossSection&) = delete;
76
77 private:
78
79 G4int GetFunctions(G4double a, G4double* y, G4double* z);
80 G4double EquLinearFit(G4double X, G4int N, const G4double X0,
81 const G4double XD, const G4double* Y);
82 G4double ThresholdEnergy(G4int Z, G4int N);
83
84 G4int lastZ = 0; // The last Z of calculated nucleus
85 G4double lastSig = 0.0; // Last value of the Cross Section
86 G4double* lastGDR = nullptr; // Pointer to the last array of GDR cross sections
87 G4double* lastHEN = nullptr; // Pointer to the last array of HEn cross sections
88 G4double lastE = 0.0; // Last used in the cross section Energy
89 G4double lastTH = 0.0; // Last value of the Energy Threshold (A-dependent)
90 G4double lastSP = 0.0; // Last value of the ShadowingPomeron (A-dependent)
91
92 // Vector of pointers to the GDRPhotonuclearCrossSection
93 std::vector <G4double*> GDR;
94
95 // store deuteron, triton, He3 XS
96 G4double* deuteron_GDR = nullptr;
97 G4double* deuteron_HR = nullptr;
98 G4double deuteron_TH = 0.0;
99 G4double deuteron_SP = 0.0;
100 G4double* triton_GDR = nullptr;
101 G4double* triton_HR = nullptr;
102 G4double triton_TH = 0.0;
103 G4double triton_SP = 0.0;
104 G4double* he3_GDR = nullptr;
105 G4double* he3_HR = nullptr;
106 G4double he3_TH = 0.0;
107 G4double he3_SP = 0.0;
108
109 // Vector of pointers to the HighEnPhotonuclearCrossSect
110 std::vector <G4double*> HEN;
111
112 std::vector <G4double> spA; // shadowing coefficients (A-dependent)
113 std::vector <G4double> eTH; // energy threshold (A-dependent)
114
115 G4NistManager* nistmngr;
116
117 G4double mNeut;
118 G4double mProt;
119 };
120
121 #endif
122