source: trunk/source/processes/hadronic/cross_sections/src/G4CrossSectionDataStore.cc@ 960

Last change on this file since 960 was 819, checked in by garnier, 17 years ago

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25//
26//
27
28#include "G4CrossSectionDataStore.hh"
29#include "G4HadronicException.hh"
30#include "G4StableIsotopes.hh"
31#include "G4HadTmpUtil.hh"
32#include "Randomize.hh"
33
34
35G4double
36G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
37 const G4Element* anElement,
38 G4double aTemperature)
39{
40 if (NDataSetList == 0)
41 {
42 throw G4HadronicException(__FILE__, __LINE__,
43 "G4CrossSectionDataStore: no data sets registered");
44 return DBL_MIN;
45 }
46 for (G4int i = NDataSetList-1; i >= 0; i--) {
47 if (DataSetList[i]->IsApplicable(aParticle, anElement))
48 return DataSetList[i]->GetCrossSection(aParticle,anElement,aTemperature);
49 }
50 throw G4HadronicException(__FILE__, __LINE__,
51 "G4CrossSectionDataStore: no applicable data set found "
52 "for particle/element");
53 return DBL_MIN;
54}
55
56G4VCrossSectionDataSet*
57G4CrossSectionDataStore::whichDataSetInCharge(const G4DynamicParticle* aParticle,
58 const G4Element* anElement)
59{
60 if (NDataSetList == 0)
61 {
62 throw G4HadronicException(__FILE__, __LINE__,
63 "G4CrossSectionDataStore: no data sets registered");
64 return 0;
65 }
66 for (G4int i = NDataSetList-1; i >= 0; i--) {
67 if (DataSetList[i]->IsApplicable(aParticle, anElement) )
68 {
69 return DataSetList[i];
70 }
71 }
72 throw G4HadronicException(__FILE__, __LINE__,
73 "G4CrossSectionDataStore: no applicable data set found "
74 "for particle/element");
75 return 0;
76}
77
78
79G4double
80G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
81 const G4Isotope* anIsotope,
82 G4double aTemperature)
83{
84 if (NDataSetList == 0)
85 {
86 throw G4HadronicException(__FILE__, __LINE__,
87 "G4CrossSectionDataStore: no data sets registered");
88 return DBL_MIN;
89 }
90 for (G4int i = NDataSetList-1; i >= 0; i--) {
91 if (DataSetList[i]->IsZAApplicable(aParticle, anIsotope->GetZ(), anIsotope->GetN()))
92 return DataSetList[i]->GetIsoCrossSection(aParticle,anIsotope,aTemperature);
93 }
94 throw G4HadronicException(__FILE__, __LINE__,
95 "G4CrossSectionDataStore: no applicable data set found "
96 "for particle/element");
97 return DBL_MIN;
98}
99
100
101G4double
102G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
103 G4double Z, G4double A,
104 G4double aTemperature)
105{
106 if (NDataSetList == 0)
107 {
108 throw G4HadronicException(__FILE__, __LINE__,
109 "G4CrossSectionDataStore: no data sets registered");
110 return DBL_MIN;
111 }
112 for (G4int i = NDataSetList-1; i >= 0; i--) {
113 if (DataSetList[i]->IsZAApplicable(aParticle, Z, A))
114 return DataSetList[i]->GetIsoZACrossSection(aParticle,Z,A,aTemperature);
115 }
116 throw G4HadronicException(__FILE__, __LINE__,
117 "G4CrossSectionDataStore: no applicable data set found "
118 "for particle/element");
119 return DBL_MIN;
120}
121
122
123G4double
124G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
125 const G4Material* aMaterial)
126{
127 G4double sigma(0);
128 G4double aTemp = aMaterial->GetTemperature();
129 G4int nElements = aMaterial->GetNumberOfElements();
130 const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
131 G4double xSection(0);
132
133 for(G4int i=0; i<nElements; i++) {
134 xSection = GetCrossSection( aParticle, (*aMaterial->GetElementVector())[i], aTemp);
135 sigma += theAtomsPerVolumeVector[i] * xSection;
136 }
137
138 return sigma;
139}
140
141
142std::pair<G4double, G4double>
143G4CrossSectionDataStore::SelectRandomIsotope(const G4DynamicParticle* particle,
144 const G4Material* aMaterial)
145{
146 static G4StableIsotopes theDefaultIsotopes; // natural abundances and
147 // stable isotopes
148 G4double aTemp = aMaterial->GetTemperature();
149 G4int nElements = aMaterial->GetNumberOfElements();
150 const G4ElementVector* theElementVector = aMaterial->GetElementVector();
151 const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
152 std::vector<std::vector<G4double> > awicsPerElement;
153 std::vector<std::vector<G4double> > AvaluesPerElement;
154 G4Element* anElement;
155
156 // Collect abundance weighted cross sections and A values for each isotope
157 // in each element
158
159 for (G4int i = 0; i < nElements; i++) {
160 anElement = (*theElementVector)[i];
161 G4int nIsoPerElement = anElement->GetNumberOfIsotopes();
162 std::vector<G4double> isoholder;
163 std::vector<G4double> aholder;
164 G4double iso_xs = DBL_MIN;
165
166 if (nIsoPerElement) { // user-defined isotope abundances
167 G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
168 G4double* abundVector = anElement->GetRelativeAbundanceVector();
169 G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
170 G4bool elementXS = false;
171 for (G4int j = 0; j < nIsoPerElement; j++) {
172 if (inCharge->IsZAApplicable(particle, (*isoVector)[j]->GetZ(),
173 (*isoVector)[j]->GetN() ) ) {
174 iso_xs = inCharge->GetIsoCrossSection(particle, (*isoVector)[j], aTemp);
175 } else if (elementXS == false) {
176 iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
177 elementXS = true;
178 }
179
180 isoholder.push_back(abundVector[j]*iso_xs);
181 aholder.push_back(G4double((*isoVector)[j]->GetN()));
182 }
183
184 } else { // natural abundances
185 G4int ZZ = G4lrint(anElement->GetZ());
186 nIsoPerElement = theDefaultIsotopes.GetNumberOfIsotopes(ZZ);
187 G4int index = theDefaultIsotopes.GetFirstIsotope(ZZ);
188 G4double AA;
189 G4double abundance;
190
191 G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
192 G4bool elementXS = false;
193
194 for (G4int j = 0; j < nIsoPerElement; j++) {
195 AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+j));
196 aholder.push_back(AA);
197 if (inCharge->IsZAApplicable(particle, G4double(ZZ), AA) ) {
198 iso_xs = inCharge->GetIsoZACrossSection(particle, G4double(ZZ), AA, aTemp);
199 } else if (elementXS == false) {
200 iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
201 elementXS = true;
202 }
203 abundance = theDefaultIsotopes.GetAbundance(index+j)/100.0;
204 isoholder.push_back(abundance*iso_xs);
205 }
206 }
207
208 awicsPerElement.push_back(isoholder);
209 AvaluesPerElement.push_back(aholder);
210 }
211
212 // Calculate running sums for isotope selection
213
214 G4double crossSectionTotal = 0;
215 G4double xSectionPerElement;
216 std::vector<G4double> runningSum;
217
218 for (G4int i=0; i < nElements; i++) {
219 xSectionPerElement = 0;
220 for (G4int j=0; j < G4int(awicsPerElement[i].size()); j++)
221 xSectionPerElement += awicsPerElement[i][j];
222 runningSum.push_back(theAtomsPerVolumeVector[i]*xSectionPerElement);
223 crossSectionTotal += runningSum[i];
224 }
225
226 // Compare random number to running sum over element xc to choose Z
227
228 // Initialize Z and A to first element and first isotope in case
229 // cross section is zero
230
231 G4double ZZ = (*theElementVector)[0]->GetZ();
232 G4double AA = AvaluesPerElement[0][0];
233 if (crossSectionTotal != 0.) {
234 G4double random = G4UniformRand();
235 for(G4int i=0; i < nElements; i++) {
236 if(i!=0) runningSum[i] += runningSum[i-1];
237 if(random <= runningSum[i]/crossSectionTotal) {
238 ZZ = ((*theElementVector)[i])->GetZ();
239
240 // Compare random number to running sum over isotope xc to choose A
241
242 G4int nIso = awicsPerElement[i].size();
243 G4double* running = new G4double[nIso];
244 for (G4int j=0; j < nIso; j++) {
245 running[j] = awicsPerElement[i][j];
246 if(j!=0) running[j] += running[j-1];
247 }
248
249 G4double trial = G4UniformRand();
250 for (G4int j=0; j < nIso; j++) {
251 AA = AvaluesPerElement[i][j];
252 if (trial <= running[j]/running[nIso-1]) break;
253 }
254 delete [] running;
255 break;
256 }
257 }
258 }
259 return std::pair<G4double, G4double>(ZZ, AA);
260}
261
262
263void
264G4CrossSectionDataStore::AddDataSet(G4VCrossSectionDataSet* aDataSet)
265{
266 if (NDataSetList == NDataSetMax) {
267 G4cout << "WARNING: G4CrossSectionDataStore::AddDataSet: "<<G4endl;
268 G4cout << " reached maximum number of data sets";
269 G4cout << " data set not added !!!!!!!!!!!!!!!!";
270 return;
271 }
272 DataSetList[NDataSetList] = aDataSet;
273 NDataSetList++;
274}
275
276
277void
278G4CrossSectionDataStore::
279BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
280{
281 if (NDataSetList == 0)
282 {
283 G4Exception("G4CrossSectionDataStore", "007", FatalException,
284 "BuildPhysicsTable: no data sets registered");
285 return;
286 }
287 for (G4int i = NDataSetList-1; i >= 0; i--) {
288 DataSetList[i]->BuildPhysicsTable(aParticleType);
289 }
290}
291
292
293void
294G4CrossSectionDataStore::
295DumpPhysicsTable(const G4ParticleDefinition& aParticleType)
296{
297 if (NDataSetList == 0) {
298 G4cout << "WARNING - G4CrossSectionDataStore::DumpPhysicsTable: no data sets registered"<<G4endl;
299 return;
300 }
301 for (G4int i = NDataSetList-1; i >= 0; i--) {
302 DataSetList[i]->DumpPhysicsTable(aParticleType);
303 }
304}
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