| Geant4 Cross Reference |
1 //
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24 // ********************************************************************
25 //
26 //
27 //
28 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
29 //
30 // History:
31 // -----------
32 // 16 Sep 2001 MGP Created
33 // 26 Sep 2001 V.Ivanchenko Hide copy constructor and assignement operator
34 // 18 Apr 2002 V.Ivanchenko Move member function ValueForMaterial to public
35 // 21 Jan 2003 V.Ivanchenko Cut per region
36 // 15 Jul 2009 N.A.Karakatsanis New methods added for loading logarithmic data
37 // to enhance computing performance of interpolation
38 //
39 // -------------------------------------------------------------------
40
41 // Class description:
42 // Low Energy Electromagnetic Physics
43 // Base class for cross section manager for an electromagnetic physics process
44
45 // -------------------------------------------------------------------
46
47 #ifndef G4VCROSSSECTIONHANDLER_HH
48 #define G4VCROSSSECTIONHANDLER_HH 1
49
50 #include <map>
51 #include <vector>
52 #include <CLHEP/Units/SystemOfUnits.h>
53
54 #include "globals.hh"
55 #include "G4DataVector.hh"
56 #include "G4MaterialCutsCouple.hh"
57
58 class G4VDataSetAlgorithm;
59 class G4VEMDataSet;
60 class G4Material;
61 class G4Element;
62
63 class G4VCrossSectionHandler {
64
65 public:
66 explicit G4VCrossSectionHandler();
67 explicit G4VCrossSectionHandler(G4VDataSetAlgorithm* interpolation,
68 G4double minE = 250*CLHEP::eV,
69 G4double maxE = 100*CLHEP::GeV,
70 G4int nBins = 200,
71 G4double unitE = CLHEP::MeV,
72 G4double unitData = CLHEP::barn,
73 G4int minZ = 1, G4int maxZ = 99);
74
75 virtual ~G4VCrossSectionHandler();
76
77 void Initialise(G4VDataSetAlgorithm* interpolation = nullptr,
78 G4double minE = 250*CLHEP::eV,
79 G4double maxE = 100*CLHEP::GeV,
80 G4int numberOfBins = 200,
81 G4double unitE = CLHEP::MeV,
82 G4double unitData = CLHEP::barn,
83 G4int minZ = 1, G4int maxZ = 99);
84
85 G4int SelectRandomAtom(const G4MaterialCutsCouple* couple, G4double e) const;
86 const G4Element* SelectRandomElement(const G4MaterialCutsCouple* material,
87 G4double e) const;
88
89 G4int SelectRandomShell(G4int Z, G4double e) const;
90 G4VEMDataSet* BuildMeanFreePathForMaterials(const G4DataVector* energyCuts = nullptr);
91 G4double FindValue(G4int Z, G4double e) const;
92 G4double FindValue(G4int Z, G4double e, G4int shellIndex) const;
93 G4double ValueForMaterial(const G4Material* material, G4double e) const;
94 void LoadData(const G4String& dataFile);
95 void LoadNonLogData(const G4String& dataFile);
96 void LoadShellData(const G4String& dataFile);
97 void PrintData() const;
98 void Clear();
99
100 G4VCrossSectionHandler(const G4VCrossSectionHandler&) = delete;
101 G4VCrossSectionHandler & operator=(const G4VCrossSectionHandler &right) = delete;
102
103 protected:
104
105 G4int NumberOfComponents(G4int Z) const;
106 void ActiveElements();
107
108 // Factory method
109 virtual std::vector<G4VEMDataSet*>* BuildCrossSectionsForMaterials(const G4DataVector& energyVector,
110 const G4DataVector* energyCuts = nullptr) = 0;
111
112 // Factory method
113 virtual G4VDataSetAlgorithm* CreateInterpolation();
114 const G4VDataSetAlgorithm* GetInterpolation() const { return interpolation; }
115
116 private:
117 G4VDataSetAlgorithm* interpolation;
118 G4DataVector activeZ;
119
120 std::map<G4int,G4VEMDataSet*,std::less<G4int> > dataMap;
121 std::vector<G4VEMDataSet*>* crossSections;
122
123 G4double eMin;
124 G4double eMax;
125 G4double unit1;
126 G4double unit2;
127
128 G4int zMin;
129 G4int zMax;
130 G4int nBins;
131 };
132
133 #endif
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