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27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // 31 //
32 // File name: G4GammaNuclearXS 32 // File name: G4GammaNuclearXS
33 // 33 //
34 // Authors V.Ivantchenko, Geant4, 20 October 34 // Authors V.Ivantchenko, Geant4, 20 October 2020
35 // B.Kutsenko, BINP/NSU, 10 August 20 35 // B.Kutsenko, BINP/NSU, 10 August 2021
36 // 36 //
37 // 37 //
38 // Class Description: 38 // Class Description:
39 // This is a base class for gamma-nuclear cros 39 // This is a base class for gamma-nuclear cross section based on
40 // data files from IAEA Evaluated Photonuclear 40 // data files from IAEA Evaluated Photonuclear Data Library (IAEA/PD-2019)
41 // https://www-nds.iaea.org/photonuclear/ 41 // https://www-nds.iaea.org/photonuclear/
42 // Database review: 42 // Database review:
43 // https://www.sciencedirect.com/science/artic 43 // https://www.sciencedirect.com/science/article/pii/S0090375219300699?via%3Dihub
44 // 44 //
45 45
46 #ifndef G4GammaNuclearXS_h 46 #ifndef G4GammaNuclearXS_h
47 #define G4GammaNuclearXS_h 1 47 #define G4GammaNuclearXS_h 1
48 48
49 #include "G4VCrossSectionDataSet.hh" 49 #include "G4VCrossSectionDataSet.hh"
50 #include "globals.hh" 50 #include "globals.hh"
51 #include <vector> 51 #include <vector>
52 52
53 class G4DynamicParticle; 53 class G4DynamicParticle;
54 class G4ParticleDefinition; 54 class G4ParticleDefinition;
55 class G4Element; 55 class G4Element;
56 class G4ElementData; 56 class G4ElementData;
57 class G4PhysicsVector; 57 class G4PhysicsVector;
58 class G4PhotoNuclearCrossSection; <<
59 58
60 class G4GammaNuclearXS final : public G4VCross 59 class G4GammaNuclearXS final : public G4VCrossSectionDataSet
61 { 60 {
62 public: 61 public:
63 62
64 G4GammaNuclearXS(); 63 G4GammaNuclearXS();
65 64
66 ~G4GammaNuclearXS() override = default; 65 ~G4GammaNuclearXS() override = default;
67 66
68 static const char* Default_Name() { return " 67 static const char* Default_Name() { return "GammaNuclearXS"; }
69 68
70 G4bool IsElementApplicable(const G4DynamicPa 69 G4bool IsElementApplicable(const G4DynamicParticle*,
71 G4int Z, const G4Material*) final; 70 G4int Z, const G4Material*) final;
72 71
73 G4bool IsIsoApplicable(const G4DynamicPartic 72 G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
74 const G4Element*, const G4Material* mat 73 const G4Element*, const G4Material* mat) final;
75 74
76 G4double GetElementCrossSection(const G4Dyna 75 G4double GetElementCrossSection(const G4DynamicParticle*,
77 G4int Z, 76 G4int Z,
78 const G4Mate 77 const G4Material* mat = nullptr) final;
79 78
80 G4double GetIsoCrossSection(const G4DynamicP 79 G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,
81 const G4Isotope* 80 const G4Isotope* iso = nullptr,
82 const G4Element* 81 const G4Element* elm = nullptr,
83 const G4Material 82 const G4Material* mat = nullptr) final;
84 83
85 const G4Isotope* SelectIsotope(const G4Eleme 84 const G4Isotope* SelectIsotope(const G4Element*,
86 G4double kinE 85 G4double kinEnergy, G4double logE) final;
87 86
88 void BuildPhysicsTable(const G4ParticleDefin 87 void BuildPhysicsTable(const G4ParticleDefinition&) final;
89 88
90 G4double IsoCrossSection(const G4double ekin << 89 G4double IsoCrossSection(G4double ekin, G4int Z, G4int A);
91 90
92 G4double ElementCrossSection(const G4double << 91 G4double ElementCrossSection(G4double ekin, G4int Z);
93 92
94 G4double LowEnergyCrossSection(G4double ekin 93 G4double LowEnergyCrossSection(G4double ekin, G4int Z);
95 94
96 void CrossSectionDescription(std::ostream&) 95 void CrossSectionDescription(std::ostream&) const final;
97 96
98 G4GammaNuclearXS & operator=(const G4GammaNu 97 G4GammaNuclearXS & operator=(const G4GammaNuclearXS &right) = delete;
99 G4GammaNuclearXS(const G4GammaNuclearXS&) = 98 G4GammaNuclearXS(const G4GammaNuclearXS&) = delete;
100 99
101 private: 100 private:
102 101
103 void Initialise(G4int Z); 102 void Initialise(G4int Z);
104 103
105 const G4String& FindDirectoryPath(); 104 const G4String& FindDirectoryPath();
106 105
107 G4PhysicsVector* RetrieveVector(std::ostring 106 G4PhysicsVector* RetrieveVector(std::ostringstream& in, G4bool warn, G4int Z);
108 107
109 G4PhotoNuclearCrossSection* ggXsection = nul << 108 G4VCrossSectionDataSet* ggXsection = nullptr;
110 const G4ParticleDefinition* gamma; 109 const G4ParticleDefinition* gamma;
111 110
112 // Cache 111 // Cache
113 G4double fXS = 0.0; 112 G4double fXS = 0.0;
114 G4double fEkin = 0.0; 113 G4double fEkin = 0.0;
115 G4int fZ = 0; 114 G4int fZ = 0;
116 115
117 static const G4int MAXZGAMMAXS = 95; 116 static const G4int MAXZGAMMAXS = 95;
118 static const G4int MAXNFREE = 11; 117 static const G4int MAXNFREE = 11;
119 static G4ElementData* data; 118 static G4ElementData* data;
>> 119 // Upper limit of the linear transition between IAEA database and CHIPS model
>> 120 static const G4double eTransitionBound;
120 // The list of elements with non-linear para 121 // The list of elements with non-linear parametrisation for better precision
121 static const G4int freeVectorException[MAXNF 122 static const G4int freeVectorException[MAXNFREE];
122 // CHIPS photonuclear model had a problem wi 123 // CHIPS photonuclear model had a problem with high energy parametrisation
123 // for isotopes of H and He, coefficient is 124 // for isotopes of H and He, coefficient is needed to connect isotope cross
124 // section with element cross-section on hig 125 // section with element cross-section on high energies.
125 static G4double coeff[3][3]; 126 static G4double coeff[3][3];
126 static G4double xs150[MAXZGAMMAXS]; 127 static G4double xs150[MAXZGAMMAXS];
127 static G4String gDataDirectory; 128 static G4String gDataDirectory;
128 129
129 std::vector<G4double> temp; 130 std::vector<G4double> temp;
130 }; 131 };
131 132
132 #endif 133 #endif
133 134