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25 //
26 // Calculation of the total, elastic and inelastic cross-sections
27 // based on Barashenkov parametrisations of pion data
28 //
29 // 16.08.06 V.Ivanchenko - first implementation
30 // 22.01.07 V.Ivanchenko - add cross section interfaces with Z and A
31 // 05.03.07 V.Ivanchenko - add IfZAApplicable
32 //
33
34 #ifndef G4UPiNuclearCrossSection_h
35 #define G4UPiNuclearCrossSection_h
36
37 #include "G4VCrossSectionDataSet.hh"
38 #include "G4DynamicParticle.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "globals.hh"
41
42 class G4PhysicsTable;
43
44 class G4UPiNuclearCrossSection : public G4VCrossSectionDataSet
45 {
46 public:
47
48 explicit G4UPiNuclearCrossSection();
49
50 ~G4UPiNuclearCrossSection() override = default;
51
52 G4bool IsElementApplicable(const G4DynamicParticle* aParticle,
53 G4int Z, const G4Material*) final;
54
55 inline
56 G4double GetElasticCrossSection(const G4DynamicParticle* aParticle,
57 G4int Z, G4int A) const;
58
59 inline
60 G4double GetInelasticCrossSection(const G4DynamicParticle* aParticle,
61 G4int Z, G4int A) const;
62
63 void BuildPhysicsTable(const G4ParticleDefinition&) final;
64
65 void DumpPhysicsTable(const G4ParticleDefinition&) final;
66
67 void CrossSectionDescription(std::ostream&) const final;
68
69 private:
70
71 G4double Interpolate(G4int Z, G4int A, G4double ekin,
72 const G4PhysicsTable*) const;
73
74 void AddDataSet(const G4String& p, const G4double* tot,
75 const G4double* in, const G4double* e, G4int n);
76
77 void LoadData();
78
79 const G4ParticleDefinition* piPlus;
80 const G4ParticleDefinition* piMinus;
81
82 static const G4int NZ = 16;
83 static G4int theZ[NZ];
84 static G4int idxZ[93];
85
86 static G4double theA[NZ];
87 static G4double APower[93];
88
89 static G4PhysicsTable* piPlusElastic;
90 static G4PhysicsTable* piPlusInelastic;
91 static G4PhysicsTable* piMinusElastic;
92 static G4PhysicsTable* piMinusInelastic;
93
94 G4double aPower{0.75};
95 G4double elow;
96
97 G4bool spline{false};
98 };
99
100 inline G4double
101 G4UPiNuclearCrossSection::GetElasticCrossSection(
102 const G4DynamicParticle* dp, G4int Z, G4int A) const
103 {
104 const G4PhysicsTable* table =
105 (dp->GetDefinition() == piPlus) ? piPlusElastic : piMinusElastic;
106 return Interpolate(Z, A, dp->GetKineticEnergy(), table);
107 }
108
109 inline G4double
110 G4UPiNuclearCrossSection::GetInelasticCrossSection(
111 const G4DynamicParticle* dp, G4int Z, G4int A) const
112 {
113 const G4PhysicsTable* table =
114 (dp->GetDefinition() == piPlus) ? piPlusInelastic : piMinusInelastic;
115 return Interpolate(Z, A, dp->GetKineticEnergy(), table);
116 }
117
118 #endif
119