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26 // -------------------------------------------------------------------
27 //
28 // GEANT4 Class file
29 //
30 // File name: G4VCrossSectionDataSet
31 //
32 // Author F.W. Jones, TRIUMF, 20-JAN-97
33 //
34 // Modifications:
35 // 23.01.2009 V.Ivanchenko move constructor and destructor to source
36 // 12.08.2011 G.Folger, V.Ivanchenko, T.Koi, D.Wright redesign the class
37 //
38
39 #include "G4VCrossSectionDataSet.hh"
40 #include "G4SystemOfUnits.hh"
41 #include "G4CrossSectionDataSetRegistry.hh"
42 #include "G4Material.hh"
43 #include "G4Element.hh"
44 #include "G4Isotope.hh"
45 #include "G4NistManager.hh"
46 #include "Randomize.hh"
47 #include "G4HadronicParameters.hh"
48
49 G4VCrossSectionDataSet::G4VCrossSectionDataSet(const G4String& nam) :
50 name(nam),
51 maxKinEnergy(G4HadronicParameters::Instance()->GetMaxEnergy())
52 {
53 registry = G4CrossSectionDataSetRegistry::Instance();
54 registry->Register(this);
55 }
56
57 G4VCrossSectionDataSet::~G4VCrossSectionDataSet()
58 {
59 registry->DeRegister(this);
60 }
61
62 G4bool
63 G4VCrossSectionDataSet::IsElementApplicable(const G4DynamicParticle*,
64 G4int,
65 const G4Material*)
66 {
67 return false;
68 }
69
70 G4bool
71 G4VCrossSectionDataSet::IsIsoApplicable(const G4DynamicParticle*,
72 G4int, G4int,
73 const G4Element*,
74 const G4Material*)
75 {
76 return false;
77 }
78
79 G4double
80 G4VCrossSectionDataSet::ComputeCrossSection(const G4DynamicParticle* part,
81 const G4Element* elm,
82 const G4Material* mat)
83 {
84 G4int Z = elm->GetZasInt();
85
86 if (IsElementApplicable(part, Z, mat)) {
87 return GetElementCrossSection(part, Z, mat);
88 }
89
90 // isotope-wise cross section making sum over available
91 // isotope cross sections, which may be incomplete, so
92 // the result is corrected
93 std::size_t nIso = elm->GetNumberOfIsotopes();
94 G4double fact = 0.0;
95 G4double xsec = 0.0;
96
97 // user-defined isotope abundances
98 const G4IsotopeVector* isoVector = elm->GetIsotopeVector();
99 const G4double* abundVector = elm->GetRelativeAbundanceVector();
100 for (std::size_t j=0; j<nIso; ++j) {
101 const G4Isotope* iso = (*isoVector)[j];
102 G4int A = iso->GetN();
103 if(abundVector[j] > 0.0 && IsIsoApplicable(part, Z, A, elm, mat)) {
104 fact += abundVector[j];
105 xsec += abundVector[j]*GetIsoCrossSection(part, Z, A, iso, elm, mat);
106 }
107 }
108 return (fact > 0.0) ? xsec/fact : 0.0;
109 }
110
111 G4double
112 G4VCrossSectionDataSet::ComputeCrossSectionPerElement(
113 G4double kinEnergy, G4double loge,
114 const G4ParticleDefinition* pd,
115 const G4Element* elm, const G4Material* mat)
116 {
117 G4int Z = elm->GetZasInt();
118 std::size_t nIso = elm->GetNumberOfIsotopes();
119 G4double xsec = 0.0;
120 const G4IsotopeVector* isoVector = elm->GetIsotopeVector();
121 const G4double* abundVector = elm->GetRelativeAbundanceVector();
122 for (std::size_t j=0; j<nIso; ++j) {
123 const G4Isotope* iso = (*isoVector)[j];
124 G4int A = iso->GetN();
125 xsec += abundVector[j]*
126 ComputeIsoCrossSection(kinEnergy, loge, pd, Z, A, iso, elm, mat);
127 }
128 return xsec;
129 }
130
131 G4double
132 G4VCrossSectionDataSet::GetElementCrossSection(const G4DynamicParticle* dynPart,
133 G4int Z,
134 const G4Material* mat)
135 {
136 G4ExceptionDescription ed;
137 ed << "GetElementCrossSection is not implemented in <" << name << ">\n"
138 << "Particle: " << dynPart->GetDefinition()->GetParticleName()
139 << " Ekin(MeV)= " << dynPart->GetKineticEnergy()/MeV;
140 if(nullptr != mat) { ed << " material: " << mat->GetName(); }
141 ed << " target Z= " << Z << G4endl;
142 G4Exception("G4VCrossSectionDataSet::GetElementCrossSection", "had001",
143 FatalException, ed);
144 return 0.0;
145 }
146
147 G4double
148 G4VCrossSectionDataSet::GetIsoCrossSection(const G4DynamicParticle* dynPart,
149 G4int Z, G4int A,
150 const G4Isotope*,
151 const G4Element* elm,
152 const G4Material* mat)
153 {
154 G4ExceptionDescription ed;
155 ed << "GetIsoCrossSection is not implemented in <" << name << ">\n"
156 << "Particle: " << dynPart->GetDefinition()->GetParticleName()
157 << " Ekin(MeV)= " << dynPart->GetKineticEnergy()/MeV;
158 if(nullptr != mat) { ed << " material: " << mat->GetName(); }
159 if(nullptr != elm) { ed << " element: " << elm->GetName(); }
160 ed << " target Z= " << Z << " A= " << A << G4endl;
161 G4Exception("G4VCrossSectionDataSet::GetIsoCrossSection", "had001",
162 FatalException, ed);
163 return 0.0;
164 }
165
166 G4double
167 G4VCrossSectionDataSet::ComputeIsoCrossSection(G4double kinEnergy, G4double,
168 const G4ParticleDefinition* pd,
169 G4int Z, G4int A,
170 const G4Isotope*,
171 const G4Element* elm,
172 const G4Material* mat)
173 {
174 G4ExceptionDescription ed;
175 ed << "GetIsoCrossSection is not implemented in <" << name << ">\n"
176 << "Particle: " << pd->GetParticleName()
177 << " Ekin(MeV)= " << kinEnergy/CLHEP::MeV;
178 if(nullptr != mat) { ed << " material: " << mat->GetName(); }
179 if(nullptr != elm) { ed << " element: " << elm->GetName(); }
180 ed << " target Z= " << Z << " A= " << A << G4endl;
181 G4Exception("G4VCrossSectionDataSet::GetIsoCrossSection", "had001",
182 FatalException, ed);
183 return 0.0;
184 }
185
186 const G4Isotope*
187 G4VCrossSectionDataSet::SelectIsotope(const G4Element* anElement,
188 G4double, G4double)
189 {
190 G4int nIso = (G4int)anElement->GetNumberOfIsotopes();
191 const G4Isotope* iso = anElement->GetIsotope(0);
192
193 // more than 1 isotope
194 if(1 < nIso) {
195 const G4double* abundVector = anElement->GetRelativeAbundanceVector();
196 G4double sum = 0.0;
197 G4double q = G4UniformRand();
198 for (G4int j=0; j<nIso; ++j) {
199 sum += abundVector[j];
200 if(q <= sum) {
201 iso = anElement->GetIsotope(j);
202 break;
203 }
204 }
205 }
206 return iso;
207 }
208
209 void G4VCrossSectionDataSet::BuildPhysicsTable(const G4ParticleDefinition&)
210 {}
211
212 void G4VCrossSectionDataSet::DumpPhysicsTable(const G4ParticleDefinition&)
213 {}
214
215 void G4VCrossSectionDataSet::CrossSectionDescription(std::ostream& outFile) const
216 {
217 outFile << "The description for this cross section data set has not been written yet.\n";
218 }
219