| 1 | //
|
|---|
| 2 | // ********************************************************************
|
|---|
| 3 | // * License and Disclaimer *
|
|---|
| 4 | // * *
|
|---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
|
|---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
|
|---|
| 7 | // * conditions of the Geant4 Software License, included in the file *
|
|---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
|
|---|
| 9 | // * include a list of copyright holders. *
|
|---|
| 10 | // * *
|
|---|
| 11 | // * Neither the authors of this software system, nor their employing *
|
|---|
| 12 | // * institutes,nor the agencies providing financial support for this *
|
|---|
| 13 | // * work make any representation or warranty, express or implied, *
|
|---|
| 14 | // * regarding this software system or assume any liability for its *
|
|---|
| 15 | // * use. Please see the license in the file LICENSE and URL above *
|
|---|
| 16 | // * for the full disclaimer and the limitation of liability. *
|
|---|
| 17 | // * *
|
|---|
| 18 | // * This code implementation is the result of the scientific and *
|
|---|
| 19 | // * technical work of the GEANT4 collaboration. *
|
|---|
| 20 | // * By using, copying, modifying or distributing the software (or *
|
|---|
| 21 | // * any work based on the software) you agree to acknowledge its *
|
|---|
| 22 | // * use in resulting scientific publications, and indicate your *
|
|---|
| 23 | // * acceptance of all terms of the Geant4 Software license. *
|
|---|
| 24 | // ********************************************************************
|
|---|
| 25 | //
|
|---|
| 26 | //
|
|---|
| 27 |
|
|---|
| 28 | #include "G4CrossSectionDataStore.hh"
|
|---|
| 29 | #include "G4HadronicException.hh"
|
|---|
| 30 | #include "G4StableIsotopes.hh"
|
|---|
| 31 | #include "G4HadTmpUtil.hh"
|
|---|
| 32 | #include "Randomize.hh"
|
|---|
| 33 | #include "G4Nucleus.hh"
|
|---|
| 34 |
|
|---|
| 35 |
|
|---|
| 36 | G4double
|
|---|
| 37 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
|
|---|
| 38 | const G4Element* anElement,
|
|---|
| 39 | G4double aTemperature)
|
|---|
| 40 | {
|
|---|
| 41 | if (NDataSetList == 0)
|
|---|
| 42 | {
|
|---|
| 43 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 44 | "G4CrossSectionDataStore: no data sets registered");
|
|---|
| 45 | return DBL_MIN;
|
|---|
| 46 | }
|
|---|
| 47 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 48 | if (DataSetList[i]->IsApplicable(aParticle, anElement))
|
|---|
| 49 | return DataSetList[i]->GetCrossSection(aParticle,anElement,aTemperature);
|
|---|
| 50 | }
|
|---|
| 51 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 52 | "G4CrossSectionDataStore: no applicable data set found "
|
|---|
| 53 | "for particle/element");
|
|---|
| 54 | return DBL_MIN;
|
|---|
| 55 | }
|
|---|
| 56 |
|
|---|
| 57 | G4VCrossSectionDataSet*
|
|---|
| 58 | G4CrossSectionDataStore::whichDataSetInCharge(const G4DynamicParticle* aParticle,
|
|---|
| 59 | const G4Element* anElement)
|
|---|
| 60 | {
|
|---|
| 61 | if (NDataSetList == 0)
|
|---|
| 62 | {
|
|---|
| 63 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 64 | "G4CrossSectionDataStore: no data sets registered");
|
|---|
| 65 | return 0;
|
|---|
| 66 | }
|
|---|
| 67 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 68 | if (DataSetList[i]->IsApplicable(aParticle, anElement) )
|
|---|
| 69 | {
|
|---|
| 70 | return DataSetList[i];
|
|---|
| 71 | }
|
|---|
| 72 | }
|
|---|
| 73 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 74 | "G4CrossSectionDataStore: no applicable data set found "
|
|---|
| 75 | "for particle/element");
|
|---|
| 76 | return 0;
|
|---|
| 77 | }
|
|---|
| 78 |
|
|---|
| 79 |
|
|---|
| 80 | G4double
|
|---|
| 81 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
|
|---|
| 82 | const G4Isotope* anIsotope,
|
|---|
| 83 | G4double aTemperature)
|
|---|
| 84 | {
|
|---|
| 85 | if (NDataSetList == 0)
|
|---|
| 86 | {
|
|---|
| 87 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 88 | "G4CrossSectionDataStore: no data sets registered");
|
|---|
| 89 | return DBL_MIN;
|
|---|
| 90 | }
|
|---|
| 91 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 92 | if (DataSetList[i]->IsZAApplicable(aParticle, anIsotope->GetZ(), anIsotope->GetN()))
|
|---|
| 93 | return DataSetList[i]->GetIsoCrossSection(aParticle,anIsotope,aTemperature);
|
|---|
| 94 | }
|
|---|
| 95 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 96 | "G4CrossSectionDataStore: no applicable data set found "
|
|---|
| 97 | "for particle/element");
|
|---|
| 98 | return DBL_MIN;
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 |
|
|---|
| 102 | G4double
|
|---|
| 103 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
|
|---|
| 104 | G4double Z, G4double A,
|
|---|
| 105 | G4double aTemperature)
|
|---|
| 106 | {
|
|---|
| 107 | if (NDataSetList == 0)
|
|---|
| 108 | {
|
|---|
| 109 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 110 | "G4CrossSectionDataStore: no data sets registered");
|
|---|
| 111 | return DBL_MIN;
|
|---|
| 112 | }
|
|---|
| 113 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 114 | if (DataSetList[i]->IsZAApplicable(aParticle, Z, A))
|
|---|
| 115 | return DataSetList[i]->GetIsoZACrossSection(aParticle,Z,A,aTemperature);
|
|---|
| 116 | }
|
|---|
| 117 | throw G4HadronicException(__FILE__, __LINE__,
|
|---|
| 118 | "G4CrossSectionDataStore: no applicable data set found "
|
|---|
| 119 | "for particle/element");
|
|---|
| 120 | return DBL_MIN;
|
|---|
| 121 | }
|
|---|
| 122 |
|
|---|
| 123 |
|
|---|
| 124 | G4double
|
|---|
| 125 | G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
|
|---|
| 126 | const G4Material* aMaterial)
|
|---|
| 127 | {
|
|---|
| 128 | G4double sigma(0);
|
|---|
| 129 | G4double aTemp = aMaterial->GetTemperature();
|
|---|
| 130 | G4int nElements = aMaterial->GetNumberOfElements();
|
|---|
| 131 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
|
|---|
| 132 | G4double xSection(0);
|
|---|
| 133 |
|
|---|
| 134 | for(G4int i=0; i<nElements; i++) {
|
|---|
| 135 | xSection = GetCrossSection( aParticle, (*aMaterial->GetElementVector())[i], aTemp);
|
|---|
| 136 | sigma += theAtomsPerVolumeVector[i] * xSection;
|
|---|
| 137 | }
|
|---|
| 138 |
|
|---|
| 139 | return sigma;
|
|---|
| 140 | }
|
|---|
| 141 |
|
|---|
| 142 |
|
|---|
| 143 | G4Element* G4CrossSectionDataStore::SampleZandA(const G4DynamicParticle* particle,
|
|---|
| 144 | const G4Material* aMaterial,
|
|---|
| 145 | G4Nucleus& target)
|
|---|
| 146 | {
|
|---|
| 147 | G4double aTemp = aMaterial->GetTemperature();
|
|---|
| 148 | const G4int nElements = aMaterial->GetNumberOfElements();
|
|---|
| 149 | const G4ElementVector* theElementVector = aMaterial->GetElementVector();
|
|---|
| 150 | G4Element* anElement = (*theElementVector)[0];
|
|---|
| 151 | G4VCrossSectionDataSet* inCharge;
|
|---|
| 152 | G4int i;
|
|---|
| 153 |
|
|---|
| 154 | // compounds
|
|---|
| 155 | if(1 < nElements) {
|
|---|
| 156 | G4double* xsec = new G4double [nElements];
|
|---|
| 157 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
|
|---|
| 158 | G4double cross = 0.0;
|
|---|
| 159 | for(i=0; i<nElements; i++) {
|
|---|
| 160 | anElement= (*theElementVector)[i];
|
|---|
| 161 | inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 162 | cross += theAtomsPerVolumeVector[i]*
|
|---|
| 163 | inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 164 | xsec[i] = cross;
|
|---|
| 165 | }
|
|---|
| 166 | cross *= G4UniformRand();
|
|---|
| 167 |
|
|---|
| 168 | for(i=0; i<nElements; i++) {
|
|---|
| 169 | if( cross <= xsec[i] ) {
|
|---|
| 170 | anElement = (*theElementVector)[i];
|
|---|
| 171 | break;
|
|---|
| 172 | }
|
|---|
| 173 | }
|
|---|
| 174 | delete [] xsec;
|
|---|
| 175 | }
|
|---|
| 176 |
|
|---|
| 177 | // element have been selected
|
|---|
| 178 | inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 179 | G4double ZZ = anElement->GetZ();
|
|---|
| 180 | G4double AA;
|
|---|
| 181 |
|
|---|
| 182 | // Collect abundance weighted cross sections and A values for each isotope
|
|---|
| 183 | // in each element
|
|---|
| 184 |
|
|---|
| 185 | const G4int nIsoPerElement = anElement->GetNumberOfIsotopes();
|
|---|
| 186 |
|
|---|
| 187 | // user-defined isotope abundances
|
|---|
| 188 | if (0 < nIsoPerElement) {
|
|---|
| 189 | G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
|
|---|
| 190 | AA = G4double((*isoVector)[0]->GetN());
|
|---|
| 191 | if(1 < nIsoPerElement) {
|
|---|
| 192 |
|
|---|
| 193 | G4double* xsec = new G4double [nIsoPerElement];
|
|---|
| 194 | G4double iso_xs = 0.0;
|
|---|
| 195 | G4double cross = 0.0;
|
|---|
| 196 |
|
|---|
| 197 | G4double* abundVector = anElement->GetRelativeAbundanceVector();
|
|---|
| 198 | G4bool elementXS = false;
|
|---|
| 199 | for (i = 0; i<nIsoPerElement; i++) {
|
|---|
| 200 | if (inCharge->IsZAApplicable(particle, ZZ, G4double((*isoVector)[i]->GetN()))) {
|
|---|
| 201 | iso_xs = inCharge->GetIsoCrossSection(particle, (*isoVector)[i], aTemp);
|
|---|
| 202 | } else if (elementXS == false) {
|
|---|
| 203 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 204 | elementXS = true;
|
|---|
| 205 | }
|
|---|
| 206 |
|
|---|
| 207 | cross += abundVector[i]*iso_xs;
|
|---|
| 208 | xsec[i] = cross;
|
|---|
| 209 | }
|
|---|
| 210 | cross *= G4UniformRand();
|
|---|
| 211 | for (i = 0; i<nIsoPerElement; i++) {
|
|---|
| 212 | if(cross <= xsec[i]) {
|
|---|
| 213 | AA = G4double((*isoVector)[i]->GetN());
|
|---|
| 214 | break;
|
|---|
| 215 | }
|
|---|
| 216 | }
|
|---|
| 217 | delete [] xsec;
|
|---|
| 218 | }
|
|---|
| 219 | // natural abundances
|
|---|
| 220 | } else {
|
|---|
| 221 |
|
|---|
| 222 | G4StableIsotopes theDefaultIsotopes;
|
|---|
| 223 | G4int Z = G4int(ZZ + 0.5);
|
|---|
| 224 | const G4int nIso = theDefaultIsotopes.GetNumberOfIsotopes(Z);
|
|---|
| 225 | G4int index = theDefaultIsotopes.GetFirstIsotope(Z);
|
|---|
| 226 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index));
|
|---|
| 227 |
|
|---|
| 228 | if(1 < nIso) {
|
|---|
| 229 |
|
|---|
| 230 | G4double* xsec = new G4double [nIso];
|
|---|
| 231 | G4double iso_xs = 0.0;
|
|---|
| 232 | G4double cross = 0.0;
|
|---|
| 233 | G4bool elementXS= false;
|
|---|
| 234 |
|
|---|
| 235 | for (i = 0; i<nIso; i++) {
|
|---|
| 236 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+i));
|
|---|
| 237 | if (inCharge->IsZAApplicable(particle, ZZ, AA )) {
|
|---|
| 238 | iso_xs = inCharge->GetIsoZACrossSection(particle, ZZ, AA, aTemp);
|
|---|
| 239 | } else if (elementXS == false) {
|
|---|
| 240 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 241 | elementXS = true;
|
|---|
| 242 | }
|
|---|
| 243 | cross += theDefaultIsotopes.GetAbundance(index+i)*iso_xs;
|
|---|
| 244 | xsec[i] = cross;
|
|---|
| 245 | }
|
|---|
| 246 | cross *= G4UniformRand();
|
|---|
| 247 | for (i = 0; i<nIso; i++) {
|
|---|
| 248 | if(cross <= xsec[i]) {
|
|---|
| 249 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+i));
|
|---|
| 250 | break;
|
|---|
| 251 | }
|
|---|
| 252 | }
|
|---|
| 253 | delete [] xsec;
|
|---|
| 254 | }
|
|---|
| 255 | }
|
|---|
| 256 | //G4cout << "XS: " << particle->GetDefinition()->GetParticleName()
|
|---|
| 257 | // << " e(GeV)= " << particle->GetKineticEnergy()/GeV
|
|---|
| 258 | // << " in " << aMaterial->GetName()
|
|---|
| 259 | // << " ZZ= " << ZZ << " AA= " << AA << " " << anElement->GetName() << G4endl;
|
|---|
| 260 |
|
|---|
| 261 | target.SetParameters(AA, ZZ);
|
|---|
| 262 | return anElement;
|
|---|
| 263 | }
|
|---|
| 264 |
|
|---|
| 265 | /*
|
|---|
| 266 | G4Element* G4CrossSectionDataStore::SampleZandA(const G4DynamicParticle* particle,
|
|---|
| 267 | const G4Material* aMaterial,
|
|---|
| 268 | G4Nucleus& target)
|
|---|
| 269 | {
|
|---|
| 270 | static G4StableIsotopes theDefaultIsotopes; // natural abundances and
|
|---|
| 271 | // stable isotopes
|
|---|
| 272 | G4double aTemp = aMaterial->GetTemperature();
|
|---|
| 273 | G4int nElements = aMaterial->GetNumberOfElements();
|
|---|
| 274 | const G4ElementVector* theElementVector = aMaterial->GetElementVector();
|
|---|
| 275 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
|
|---|
| 276 | std::vector<std::vector<G4double> > awicsPerElement;
|
|---|
| 277 | std::vector<std::vector<G4double> > AvaluesPerElement;
|
|---|
| 278 | G4Element* anElement;
|
|---|
| 279 |
|
|---|
| 280 | // Collect abundance weighted cross sections and A values for each isotope
|
|---|
| 281 | // in each element
|
|---|
| 282 |
|
|---|
| 283 | for (G4int i = 0; i < nElements; i++) {
|
|---|
| 284 | anElement = (*theElementVector)[i];
|
|---|
| 285 | G4int nIsoPerElement = anElement->GetNumberOfIsotopes();
|
|---|
| 286 | std::vector<G4double> isoholder;
|
|---|
| 287 | std::vector<G4double> aholder;
|
|---|
| 288 | G4double iso_xs = DBL_MIN;
|
|---|
| 289 |
|
|---|
| 290 | if (nIsoPerElement) { // user-defined isotope abundances
|
|---|
| 291 | G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
|
|---|
| 292 | G4double* abundVector = anElement->GetRelativeAbundanceVector();
|
|---|
| 293 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 294 | G4bool elementXS = false;
|
|---|
| 295 | for (G4int j = 0; j < nIsoPerElement; j++) {
|
|---|
| 296 | if (inCharge->IsZAApplicable(particle, (*isoVector)[j]->GetZ(),
|
|---|
| 297 | (*isoVector)[j]->GetN() ) ) {
|
|---|
| 298 | iso_xs = inCharge->GetIsoCrossSection(particle, (*isoVector)[j], aTemp);
|
|---|
| 299 | } else if (elementXS == false) {
|
|---|
| 300 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 301 | elementXS = true;
|
|---|
| 302 | }
|
|---|
| 303 |
|
|---|
| 304 | isoholder.push_back(abundVector[j]*iso_xs);
|
|---|
| 305 | aholder.push_back(G4double((*isoVector)[j]->GetN()));
|
|---|
| 306 | }
|
|---|
| 307 |
|
|---|
| 308 | } else { // natural abundances
|
|---|
| 309 | G4int ZZ = G4lrint(anElement->GetZ());
|
|---|
| 310 | nIsoPerElement = theDefaultIsotopes.GetNumberOfIsotopes(ZZ);
|
|---|
| 311 | G4int index = theDefaultIsotopes.GetFirstIsotope(ZZ);
|
|---|
| 312 | G4double AA;
|
|---|
| 313 | G4double abundance;
|
|---|
| 314 |
|
|---|
| 315 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 316 | G4bool elementXS = false;
|
|---|
| 317 |
|
|---|
| 318 | for (G4int j = 0; j < nIsoPerElement; j++) {
|
|---|
| 319 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+j));
|
|---|
| 320 | aholder.push_back(AA);
|
|---|
| 321 | if (inCharge->IsZAApplicable(particle, G4double(ZZ), AA) ) {
|
|---|
| 322 | iso_xs = inCharge->GetIsoZACrossSection(particle, G4double(ZZ), AA, aTemp);
|
|---|
| 323 | } else if (elementXS == false) {
|
|---|
| 324 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 325 | elementXS = true;
|
|---|
| 326 | }
|
|---|
| 327 | abundance = theDefaultIsotopes.GetAbundance(index+j)/100.0;
|
|---|
| 328 | isoholder.push_back(abundance*iso_xs);
|
|---|
| 329 | }
|
|---|
| 330 | }
|
|---|
| 331 |
|
|---|
| 332 | awicsPerElement.push_back(isoholder);
|
|---|
| 333 | AvaluesPerElement.push_back(aholder);
|
|---|
| 334 | }
|
|---|
| 335 |
|
|---|
| 336 | // Calculate running sums for isotope selection
|
|---|
| 337 |
|
|---|
| 338 | G4double crossSectionTotal = 0;
|
|---|
| 339 | G4double xSectionPerElement;
|
|---|
| 340 | std::vector<G4double> runningSum;
|
|---|
| 341 |
|
|---|
| 342 | for (G4int i=0; i < nElements; i++) {
|
|---|
| 343 | xSectionPerElement = 0;
|
|---|
| 344 | for (G4int j=0; j < G4int(awicsPerElement[i].size()); j++)
|
|---|
| 345 | xSectionPerElement += awicsPerElement[i][j];
|
|---|
| 346 | runningSum.push_back(theAtomsPerVolumeVector[i]*xSectionPerElement);
|
|---|
| 347 | crossSectionTotal += runningSum[i];
|
|---|
| 348 | }
|
|---|
| 349 |
|
|---|
| 350 | // Compare random number to running sum over element xc to choose Z
|
|---|
| 351 |
|
|---|
| 352 | // Initialize Z and A to first element and first isotope in case
|
|---|
| 353 | // cross section is zero
|
|---|
| 354 |
|
|---|
| 355 | anElement = (*theElementVector)[0];
|
|---|
| 356 | G4double ZZ = anElement->GetZ();
|
|---|
| 357 | G4double AA = AvaluesPerElement[0][0];
|
|---|
| 358 | if (crossSectionTotal != 0.) {
|
|---|
| 359 | G4double random = G4UniformRand();
|
|---|
| 360 | for(G4int i=0; i < nElements; i++) {
|
|---|
| 361 | if(i!=0) runningSum[i] += runningSum[i-1];
|
|---|
| 362 | if(random <= runningSum[i]/crossSectionTotal) {
|
|---|
| 363 | anElement = (*theElementVector)[i];
|
|---|
| 364 | ZZ = anElement->GetZ();
|
|---|
| 365 |
|
|---|
| 366 | // Compare random number to running sum over isotope xc to choose A
|
|---|
| 367 |
|
|---|
| 368 | G4int nIso = awicsPerElement[i].size();
|
|---|
| 369 | G4double* running = new G4double[nIso];
|
|---|
| 370 | for (G4int j=0; j < nIso; j++) {
|
|---|
| 371 | running[j] = awicsPerElement[i][j];
|
|---|
| 372 | if(j!=0) running[j] += running[j-1];
|
|---|
| 373 | }
|
|---|
| 374 |
|
|---|
| 375 | G4double trial = G4UniformRand();
|
|---|
| 376 | for (G4int j=0; j < nIso; j++) {
|
|---|
| 377 | AA = AvaluesPerElement[i][j];
|
|---|
| 378 | if (trial <= running[j]/running[nIso-1]) break;
|
|---|
| 379 | }
|
|---|
| 380 | delete [] running;
|
|---|
| 381 | break;
|
|---|
| 382 | }
|
|---|
| 383 | }
|
|---|
| 384 | }
|
|---|
| 385 |
|
|---|
| 386 | //G4cout << "XS: " << particle->GetDefinition()->GetParticleName()
|
|---|
| 387 | // << " e(GeV)= " << particle->GetKineticEnergy()/GeV
|
|---|
| 388 | // << " in " << aMaterial->GetName()
|
|---|
| 389 | // << " ZZ= " << ZZ << " AA= " << AA << " " << anElement->GetName() << G4endl;
|
|---|
| 390 |
|
|---|
| 391 | target.SetParameters(AA, ZZ);
|
|---|
| 392 | return anElement;
|
|---|
| 393 | }
|
|---|
| 394 | */
|
|---|
| 395 |
|
|---|
| 396 | std::pair<G4double, G4double>
|
|---|
| 397 | G4CrossSectionDataStore::SelectRandomIsotope(const G4DynamicParticle* particle,
|
|---|
| 398 | const G4Material* aMaterial)
|
|---|
| 399 | {
|
|---|
| 400 | static G4StableIsotopes theDefaultIsotopes; // natural abundances and
|
|---|
| 401 | // stable isotopes
|
|---|
| 402 | G4double aTemp = aMaterial->GetTemperature();
|
|---|
| 403 | G4int nElements = aMaterial->GetNumberOfElements();
|
|---|
| 404 | const G4ElementVector* theElementVector = aMaterial->GetElementVector();
|
|---|
| 405 | const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
|
|---|
| 406 | std::vector<std::vector<G4double> > awicsPerElement;
|
|---|
| 407 | std::vector<std::vector<G4double> > AvaluesPerElement;
|
|---|
| 408 | G4Element* anElement;
|
|---|
| 409 |
|
|---|
| 410 | // Collect abundance weighted cross sections and A values for each isotope
|
|---|
| 411 | // in each element
|
|---|
| 412 |
|
|---|
| 413 | for (G4int i = 0; i < nElements; i++) {
|
|---|
| 414 | anElement = (*theElementVector)[i];
|
|---|
| 415 | G4int nIsoPerElement = anElement->GetNumberOfIsotopes();
|
|---|
| 416 | std::vector<G4double> isoholder;
|
|---|
| 417 | std::vector<G4double> aholder;
|
|---|
| 418 | G4double iso_xs = DBL_MIN;
|
|---|
| 419 |
|
|---|
| 420 | if (nIsoPerElement) { // user-defined isotope abundances
|
|---|
| 421 | G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
|
|---|
| 422 | G4double* abundVector = anElement->GetRelativeAbundanceVector();
|
|---|
| 423 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 424 | G4bool elementXS = false;
|
|---|
| 425 | for (G4int j = 0; j < nIsoPerElement; j++) {
|
|---|
| 426 | if (inCharge->IsZAApplicable(particle, (*isoVector)[j]->GetZ(),
|
|---|
| 427 | (*isoVector)[j]->GetN() ) ) {
|
|---|
| 428 | iso_xs = inCharge->GetIsoCrossSection(particle, (*isoVector)[j], aTemp);
|
|---|
| 429 | } else if (elementXS == false) {
|
|---|
| 430 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 431 | elementXS = true;
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 | isoholder.push_back(abundVector[j]*iso_xs);
|
|---|
| 435 | aholder.push_back(G4double((*isoVector)[j]->GetN()));
|
|---|
| 436 | }
|
|---|
| 437 |
|
|---|
| 438 | } else { // natural abundances
|
|---|
| 439 | G4int ZZ = G4lrint(anElement->GetZ());
|
|---|
| 440 | nIsoPerElement = theDefaultIsotopes.GetNumberOfIsotopes(ZZ);
|
|---|
| 441 | G4int index = theDefaultIsotopes.GetFirstIsotope(ZZ);
|
|---|
| 442 | G4double AA;
|
|---|
| 443 | G4double abundance;
|
|---|
| 444 |
|
|---|
| 445 | G4VCrossSectionDataSet* inCharge = whichDataSetInCharge(particle, anElement);
|
|---|
| 446 | G4bool elementXS = false;
|
|---|
| 447 |
|
|---|
| 448 | for (G4int j = 0; j < nIsoPerElement; j++) {
|
|---|
| 449 | AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+j));
|
|---|
| 450 | aholder.push_back(AA);
|
|---|
| 451 | if (inCharge->IsZAApplicable(particle, G4double(ZZ), AA) ) {
|
|---|
| 452 | iso_xs = inCharge->GetIsoZACrossSection(particle, G4double(ZZ), AA, aTemp);
|
|---|
| 453 | } else if (elementXS == false) {
|
|---|
| 454 | iso_xs = inCharge->GetCrossSection(particle, anElement, aTemp);
|
|---|
| 455 | elementXS = true;
|
|---|
| 456 | }
|
|---|
| 457 | abundance = theDefaultIsotopes.GetAbundance(index+j)/100.0;
|
|---|
| 458 | isoholder.push_back(abundance*iso_xs);
|
|---|
| 459 | }
|
|---|
| 460 | }
|
|---|
| 461 |
|
|---|
| 462 | awicsPerElement.push_back(isoholder);
|
|---|
| 463 | AvaluesPerElement.push_back(aholder);
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | // Calculate running sums for isotope selection
|
|---|
| 467 |
|
|---|
| 468 | G4double crossSectionTotal = 0;
|
|---|
| 469 | G4double xSectionPerElement;
|
|---|
| 470 | std::vector<G4double> runningSum;
|
|---|
| 471 |
|
|---|
| 472 | for (G4int i=0; i < nElements; i++) {
|
|---|
| 473 | xSectionPerElement = 0;
|
|---|
| 474 | for (G4int j=0; j < G4int(awicsPerElement[i].size()); j++)
|
|---|
| 475 | xSectionPerElement += awicsPerElement[i][j];
|
|---|
| 476 | runningSum.push_back(theAtomsPerVolumeVector[i]*xSectionPerElement);
|
|---|
| 477 | crossSectionTotal += runningSum[i];
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 | // Compare random number to running sum over element xc to choose Z
|
|---|
| 481 |
|
|---|
| 482 | // Initialize Z and A to first element and first isotope in case
|
|---|
| 483 | // cross section is zero
|
|---|
| 484 |
|
|---|
| 485 | G4double ZZ = (*theElementVector)[0]->GetZ();
|
|---|
| 486 | G4double AA = AvaluesPerElement[0][0];
|
|---|
| 487 | if (crossSectionTotal != 0.) {
|
|---|
| 488 | G4double random = G4UniformRand();
|
|---|
| 489 | for(G4int i=0; i < nElements; i++) {
|
|---|
| 490 | if(i!=0) runningSum[i] += runningSum[i-1];
|
|---|
| 491 | if(random <= runningSum[i]/crossSectionTotal) {
|
|---|
| 492 | ZZ = ((*theElementVector)[i])->GetZ();
|
|---|
| 493 |
|
|---|
| 494 | // Compare random number to running sum over isotope xc to choose A
|
|---|
| 495 |
|
|---|
| 496 | G4int nIso = awicsPerElement[i].size();
|
|---|
| 497 | G4double* running = new G4double[nIso];
|
|---|
| 498 | for (G4int j=0; j < nIso; j++) {
|
|---|
| 499 | running[j] = awicsPerElement[i][j];
|
|---|
| 500 | if(j!=0) running[j] += running[j-1];
|
|---|
| 501 | }
|
|---|
| 502 |
|
|---|
| 503 | G4double trial = G4UniformRand();
|
|---|
| 504 | for (G4int j=0; j < nIso; j++) {
|
|---|
| 505 | AA = AvaluesPerElement[i][j];
|
|---|
| 506 | if (trial <= running[j]/running[nIso-1]) break;
|
|---|
| 507 | }
|
|---|
| 508 | delete [] running;
|
|---|
| 509 | break;
|
|---|
| 510 | }
|
|---|
| 511 | }
|
|---|
| 512 | }
|
|---|
| 513 | return std::pair<G4double, G4double>(ZZ, AA);
|
|---|
| 514 | }
|
|---|
| 515 |
|
|---|
| 516 |
|
|---|
| 517 | void
|
|---|
| 518 | G4CrossSectionDataStore::AddDataSet(G4VCrossSectionDataSet* aDataSet)
|
|---|
| 519 | {
|
|---|
| 520 | if (NDataSetList == NDataSetMax) {
|
|---|
| 521 | G4cout << "WARNING: G4CrossSectionDataStore::AddDataSet: "<<G4endl;
|
|---|
| 522 | G4cout << " reached maximum number of data sets";
|
|---|
| 523 | G4cout << " data set not added !!!!!!!!!!!!!!!!";
|
|---|
| 524 | return;
|
|---|
| 525 | }
|
|---|
| 526 | DataSetList[NDataSetList] = aDataSet;
|
|---|
| 527 | NDataSetList++;
|
|---|
| 528 | }
|
|---|
| 529 |
|
|---|
| 530 |
|
|---|
| 531 | void
|
|---|
| 532 | G4CrossSectionDataStore::
|
|---|
| 533 | BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
|
|---|
| 534 | {
|
|---|
| 535 | if (NDataSetList == 0)
|
|---|
| 536 | {
|
|---|
| 537 | G4Exception("G4CrossSectionDataStore", "007", FatalException,
|
|---|
| 538 | "BuildPhysicsTable: no data sets registered");
|
|---|
| 539 | return;
|
|---|
| 540 | }
|
|---|
| 541 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 542 | DataSetList[i]->BuildPhysicsTable(aParticleType);
|
|---|
| 543 | }
|
|---|
| 544 | }
|
|---|
| 545 |
|
|---|
| 546 |
|
|---|
| 547 | void
|
|---|
| 548 | G4CrossSectionDataStore::
|
|---|
| 549 | DumpPhysicsTable(const G4ParticleDefinition& aParticleType)
|
|---|
| 550 | {
|
|---|
| 551 | if (NDataSetList == 0) {
|
|---|
| 552 | G4cout << "WARNING - G4CrossSectionDataStore::DumpPhysicsTable: no data sets registered"<<G4endl;
|
|---|
| 553 | return;
|
|---|
| 554 | }
|
|---|
| 555 | for (G4int i = NDataSetList-1; i >= 0; i--) {
|
|---|
| 556 | DataSetList[i]->DumpPhysicsTable(aParticleType);
|
|---|
| 557 | }
|
|---|
| 558 | }
|
|---|
