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25 //
26 //
27 // Author: Luciano Pandola
28 //
29 // History:
30 // --------
31 // 23 Nov 2010 L Pandola First complete implementation, Penelope v2008
32 // 24 May 2011 L. Pandola Renamed (make default Penelope)
33 // 13 Mar 2012 L. Pandola Updated the interface for the angular generator
34 // 18 Jul 2012 L. Pandola Migrate to the new interface of the angular generator, which
35 // now provides the G4ThreeVector and takes care of rotation
36 // 02 Oct 2013 L. Pandola Migrated to MT
37 // 17 Oct 2013 L. Pandola Partially revert the MT migration: the angular generator is
38 // kept as thread-local, and created/managed by the workers.
39 //
40
41 #include "G4PenelopeBremsstrahlungModel.hh"
42 #include "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "G4PenelopeBremsstrahlungFS.hh"
45 #include "G4PenelopeBremsstrahlungAngular.hh"
46 #include "G4ParticleDefinition.hh"
47 #include "G4MaterialCutsCouple.hh"
48 #include "G4ProductionCutsTable.hh"
49 #include "G4DynamicParticle.hh"
50 #include "G4Gamma.hh"
51 #include "G4Electron.hh"
52 #include "G4Positron.hh"
53 #include "G4PenelopeOscillatorManager.hh"
54 #include "G4PenelopeCrossSection.hh"
55 #include "G4PhysicsFreeVector.hh"
56 #include "G4PhysicsLogVector.hh"
57 #include "G4PhysicsTable.hh"
58 #include "G4Exp.hh"
59
60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
61 namespace { G4Mutex PenelopeBremsstrahlungModelMutex = G4MUTEX_INITIALIZER; }
62
63 G4PenelopeBremsstrahlungModel::G4PenelopeBremsstrahlungModel(const G4ParticleDefinition* part,
64 const G4String& nam)
65 :G4VEmModel(nam),fParticleChange(nullptr),fParticle(nullptr),
66 fPenelopeFSHelper(nullptr),fPenelopeAngular(nullptr),fEnergyGrid(nullptr),
67 fXSTableElectron(nullptr),fXSTablePositron(nullptr),
68 fIsInitialised(false),fLocalTable(false)
69
70 {
71 fIntrinsicLowEnergyLimit = 100.0*eV;
72 fIntrinsicHighEnergyLimit = 100.0*GeV;
73 nBins = 200;
74
75 if (part)
76 SetParticle(part);
77
78 SetHighEnergyLimit(fIntrinsicHighEnergyLimit);
79 //
80 fOscManager = G4PenelopeOscillatorManager::GetOscillatorManager();
81 //
82 fVerboseLevel= 0;
83 // Verbosity scale:
84 // 0 = nothing
85 // 1 = warning for energy non-conservation
86 // 2 = details of energy budget
87 // 3 = calculation of cross sections, file openings, sampling of atoms
88 // 4 = entering in methods
89
90 // Atomic deexcitation model activated by default
91 SetDeexcitationFlag(true);
92
93 }
94
95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
96
97 G4PenelopeBremsstrahlungModel::~G4PenelopeBremsstrahlungModel()
98 {
99 if (IsMaster() || fLocalTable)
100 {
101 ClearTables();
102 if (fPenelopeFSHelper)
103 delete fPenelopeFSHelper;
104 }
105 // This is thread-local at the moment
106 if (fPenelopeAngular)
107 delete fPenelopeAngular;
108 }
109
110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
111
112 void G4PenelopeBremsstrahlungModel::Initialise(const G4ParticleDefinition* part,
113 const G4DataVector& theCuts)
114 {
115 if (fVerboseLevel > 3)
116 G4cout << "Calling G4PenelopeBremsstrahlungModel::Initialise()" << G4endl;
117
118 SetParticle(part);
119
120 if (IsMaster() && part == fParticle)
121 {
122 if (!fPenelopeFSHelper)
123 fPenelopeFSHelper = new G4PenelopeBremsstrahlungFS(fVerboseLevel);
124 if (!fPenelopeAngular)
125 fPenelopeAngular = new G4PenelopeBremsstrahlungAngular();
126 //Clear and re-build the tables
127 ClearTables();
128
129 //forces the cleaning of tables, in this specific case
130 if (fPenelopeAngular)
131 fPenelopeAngular->Initialize();
132
133 //Set the number of bins for the tables. 20 points per decade
134 nBins = (std::size_t) (20*std::log10(HighEnergyLimit()/LowEnergyLimit()));
135 nBins = std::max(nBins,(std::size_t)100);
136 fEnergyGrid = new G4PhysicsLogVector(LowEnergyLimit(),
137 HighEnergyLimit(),
138 nBins-1); //one hidden bin is added
139
140 fXSTableElectron = new
141 std::map< std::pair<const G4Material*,G4double>, G4PenelopeCrossSection*>;
142 fXSTablePositron = new
143 std::map< std::pair<const G4Material*,G4double>, G4PenelopeCrossSection*>;
144
145 G4ProductionCutsTable* theCoupleTable =
146 G4ProductionCutsTable::GetProductionCutsTable();
147
148 //Build tables for all materials
149 for (G4int i=0;i<(G4int)theCoupleTable->GetTableSize();++i)
150 {
151 const G4Material* theMat =
152 theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
153 //Forces the building of the helper tables
154 fPenelopeFSHelper->BuildScaledXSTable(theMat,theCuts.at(i),IsMaster());
155 fPenelopeAngular->PrepareTables(theMat,IsMaster());
156 BuildXSTable(theMat,theCuts.at(i));
157
158 }
159
160 if (fVerboseLevel > 2) {
161 G4cout << "Penelope Bremsstrahlung model v2008 is initialized " << G4endl
162 << "Energy range: "
163 << LowEnergyLimit() / keV << " keV - "
164 << HighEnergyLimit() / GeV << " GeV."
165 << G4endl;
166 }
167 }
168
169 if(fIsInitialised) return;
170 fParticleChange = GetParticleChangeForLoss();
171 fIsInitialised = true;
172 }
173
174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
175
176 void G4PenelopeBremsstrahlungModel::InitialiseLocal(const G4ParticleDefinition* part,
177 G4VEmModel *masterModel)
178 {
179 if (fVerboseLevel > 3)
180 G4cout << "Calling G4PenelopeBremsstrahlungModel::InitialiseLocal()" << G4endl;
181 //
182 //Check that particle matches: one might have multiple master models (e.g.
183 //for e+ and e-).
184 //
185 if (part == fParticle)
186 {
187 //Get the const table pointers from the master to the workers
188 const G4PenelopeBremsstrahlungModel* theModel =
189 static_cast<G4PenelopeBremsstrahlungModel*> (masterModel);
190
191 //Copy pointers to the data tables
192 fEnergyGrid = theModel->fEnergyGrid;
193 fXSTableElectron = theModel->fXSTableElectron;
194 fXSTablePositron = theModel->fXSTablePositron;
195 fPenelopeFSHelper = theModel->fPenelopeFSHelper;
196
197 //created in each thread and initialized.
198 if (!fPenelopeAngular)
199 fPenelopeAngular = new G4PenelopeBremsstrahlungAngular();
200 //forces the cleaning of tables, in this specific case
201 if (fPenelopeAngular)
202 fPenelopeAngular->Initialize();
203
204 G4ProductionCutsTable* theCoupleTable =
205 G4ProductionCutsTable::GetProductionCutsTable();
206 //Build tables for all materials
207 for (G4int i=0;i<(G4int)theCoupleTable->GetTableSize();++i)
208 {
209 const G4Material* theMat =
210 theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
211 fPenelopeAngular->PrepareTables(theMat,IsMaster());
212 }
213
214 //copy the data
215 nBins = theModel->nBins;
216
217 //Same verbosity for all workers, as the master
218 fVerboseLevel = theModel->fVerboseLevel;
219 }
220 return;
221 }
222
223 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
224
225 G4double G4PenelopeBremsstrahlungModel::CrossSectionPerVolume(const G4Material* material,
226 const G4ParticleDefinition* theParticle,
227 G4double energy,
228 G4double cutEnergy,
229 G4double)
230 {
231 //
232 if (fVerboseLevel > 3)
233 G4cout << "Calling CrossSectionPerVolume() of G4PenelopeBremsstrahlungModel" << G4endl;
234
235 SetupForMaterial(theParticle, material, energy);
236 G4double crossPerMolecule = 0.;
237
238 G4PenelopeCrossSection* theXS = GetCrossSectionTableForCouple(theParticle,material,
239 cutEnergy);
240 if (theXS)
241 crossPerMolecule = theXS->GetHardCrossSection(energy);
242
243 G4double atomDensity = material->GetTotNbOfAtomsPerVolume();
244 G4double atPerMol = fOscManager->GetAtomsPerMolecule(material);
245
246 if (fVerboseLevel > 3)
247 G4cout << "Material " << material->GetName() << " has " << atPerMol <<
248 "atoms per molecule" << G4endl;
249
250 G4double moleculeDensity = 0.;
251 if (atPerMol)
252 moleculeDensity = atomDensity/atPerMol;
253
254 G4double crossPerVolume = crossPerMolecule*moleculeDensity;
255
256 if (fVerboseLevel > 2)
257 {
258 G4cout << "G4PenelopeBremsstrahlungModel " << G4endl;
259 G4cout << "Mean free path for gamma emission > " << cutEnergy/keV << " keV at " <<
260 energy/keV << " keV = " << (1./crossPerVolume)/mm << " mm" << G4endl;
261 }
262
263 return crossPerVolume;
264 }
265
266 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
267
268 //This is a dummy method. Never inkoved by the tracking, it just issues
269 //a warning if one tries to get Cross Sections per Atom via the
270 //G4EmCalculator.
271 G4double G4PenelopeBremsstrahlungModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
272 G4double,
273 G4double,
274 G4double,
275 G4double,
276 G4double)
277 {
278 G4cout << "*** G4PenelopeBremsstrahlungModel -- WARNING ***" << G4endl;
279 G4cout << "Penelope Bremsstrahlung model v2008 does not calculate cross section _per atom_ " << G4endl;
280 G4cout << "so the result is always zero. For physics values, please invoke " << G4endl;
281 G4cout << "GetCrossSectionPerVolume() or GetMeanFreePath() via the G4EmCalculator" << G4endl;
282 return 0;
283 }
284
285 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
286
287 G4double G4PenelopeBremsstrahlungModel::ComputeDEDXPerVolume(const G4Material* material,
288 const G4ParticleDefinition* theParticle,
289 G4double kineticEnergy,
290 G4double cutEnergy)
291 {
292 if (fVerboseLevel > 3)
293 G4cout << "Calling ComputeDEDX() of G4PenelopeBremsstrahlungModel" << G4endl;
294
295 G4PenelopeCrossSection* theXS = GetCrossSectionTableForCouple(theParticle,material,
296 cutEnergy);
297 G4double sPowerPerMolecule = 0.0;
298 if (theXS)
299 sPowerPerMolecule = theXS->GetSoftStoppingPower(kineticEnergy);
300
301 G4double atomDensity = material->GetTotNbOfAtomsPerVolume();
302 G4double atPerMol = fOscManager->GetAtomsPerMolecule(material);
303
304 G4double moleculeDensity = 0.;
305 if (atPerMol)
306 moleculeDensity = atomDensity/atPerMol;
307
308 G4double sPowerPerVolume = sPowerPerMolecule*moleculeDensity;
309
310 if (fVerboseLevel > 2)
311 {
312 G4cout << "G4PenelopeBremsstrahlungModel " << G4endl;
313 G4cout << "Stopping power < " << cutEnergy/keV << " keV at " <<
314 kineticEnergy/keV << " keV = " <<
315 sPowerPerVolume/(keV/mm) << " keV/mm" << G4endl;
316 }
317 return sPowerPerVolume;
318 }
319
320 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
321
322 void G4PenelopeBremsstrahlungModel::SampleSecondaries(std::vector<G4DynamicParticle*>*fvect,
323 const G4MaterialCutsCouple* couple,
324 const G4DynamicParticle* aDynamicParticle,
325 G4double cutG,
326 G4double)
327 {
328 if (fVerboseLevel > 3)
329 G4cout << "Calling SampleSecondaries() of G4PenelopeBremsstrahlungModel" << G4endl;
330
331 G4double kineticEnergy = aDynamicParticle->GetKineticEnergy();
332 const G4Material* material = couple->GetMaterial();
333
334 if (kineticEnergy <= fIntrinsicLowEnergyLimit)
335 {
336 fParticleChange->SetProposedKineticEnergy(0.);
337 fParticleChange->ProposeLocalEnergyDeposit(kineticEnergy);
338 return ;
339 }
340
341 G4ParticleMomentum particleDirection0 = aDynamicParticle->GetMomentumDirection();
342 //This is the momentum
343 G4ThreeVector initialMomentum = aDynamicParticle->GetMomentum();
344
345 //Not enough energy to produce a secondary! Return with nothing happened
346 if (kineticEnergy < cutG)
347 return;
348
349 if (fVerboseLevel > 3)
350 G4cout << "Going to sample gamma energy for: " <<material->GetName() << " " <<
351 "energy = " << kineticEnergy/keV << ", cut = " << cutG/keV << G4endl;
352
353 //Sample gamma's energy according to the spectrum
354 G4double gammaEnergy =
355 fPenelopeFSHelper->SampleGammaEnergy(kineticEnergy,material,cutG);
356
357 if (fVerboseLevel > 3)
358 G4cout << "Sampled gamma energy: " << gammaEnergy/keV << " keV" << G4endl;
359
360 //Now sample the direction for the Gamma. Notice that the rotation is already done
361 //Z is unused here, I plug 0. The information is in the material pointer
362 G4ThreeVector gammaDirection1 =
363 fPenelopeAngular->SampleDirection(aDynamicParticle,gammaEnergy,0,material);
364
365 if (fVerboseLevel > 3)
366 G4cout << "Sampled cosTheta for e-: " << gammaDirection1.cosTheta() << G4endl;
367
368 G4double residualPrimaryEnergy = kineticEnergy-gammaEnergy;
369 if (residualPrimaryEnergy < 0)
370 {
371 //Ok we have a problem, all energy goes with the gamma
372 gammaEnergy += residualPrimaryEnergy;
373 residualPrimaryEnergy = 0.0;
374 }
375
376 //Produce final state according to momentum conservation
377 G4ThreeVector particleDirection1 = initialMomentum - gammaEnergy*gammaDirection1;
378 particleDirection1 = particleDirection1.unit(); //normalize
379
380 //Update the primary particle
381 if (residualPrimaryEnergy > 0.)
382 {
383 fParticleChange->ProposeMomentumDirection(particleDirection1);
384 fParticleChange->SetProposedKineticEnergy(residualPrimaryEnergy);
385 }
386 else
387 {
388 fParticleChange->SetProposedKineticEnergy(0.);
389 }
390
391 //Now produce the photon
392 G4DynamicParticle* theGamma = new G4DynamicParticle(G4Gamma::Gamma(),
393 gammaDirection1,
394 gammaEnergy);
395 fvect->push_back(theGamma);
396
397 if (fVerboseLevel > 1)
398 {
399 G4cout << "-----------------------------------------------------------" << G4endl;
400 G4cout << "Energy balance from G4PenelopeBremsstrahlung" << G4endl;
401 G4cout << "Incoming primary energy: " << kineticEnergy/keV << " keV" << G4endl;
402 G4cout << "-----------------------------------------------------------" << G4endl;
403 G4cout << "Outgoing primary energy: " << residualPrimaryEnergy/keV << " keV" << G4endl;
404 G4cout << "Bremsstrahlung photon " << gammaEnergy/keV << " keV" << G4endl;
405 G4cout << "Total final state: " << (residualPrimaryEnergy+gammaEnergy)/keV
406 << " keV" << G4endl;
407 G4cout << "-----------------------------------------------------------" << G4endl;
408 }
409
410 if (fVerboseLevel > 0)
411 {
412 G4double energyDiff = std::fabs(residualPrimaryEnergy+gammaEnergy-kineticEnergy);
413 if (energyDiff > 0.05*keV)
414 G4cout << "Warning from G4PenelopeBremsstrahlung: problem with energy conservation: "
415 <<
416 (residualPrimaryEnergy+gammaEnergy)/keV <<
417 " keV (final) vs. " <<
418 kineticEnergy/keV << " keV (initial)" << G4endl;
419 }
420 return;
421 }
422
423 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
424
425 void G4PenelopeBremsstrahlungModel::ClearTables()
426 {
427 if (!IsMaster() && !fLocalTable)
428 //Should not be here!
429 G4Exception("G4PenelopeBremsstrahlungModel::ClearTables()",
430 "em0100",FatalException,"Worker thread in this method");
431
432 if (fXSTableElectron)
433 {
434 for (auto& item : (*fXSTableElectron))
435 delete item.second;
436 delete fXSTableElectron;
437 fXSTableElectron = nullptr;
438 }
439 if (fXSTablePositron)
440 {
441 for (auto& item : (*fXSTablePositron))
442 delete item.second;
443 delete fXSTablePositron;
444 fXSTablePositron = nullptr;
445 }
446 /*
447 if (fEnergyGrid)
448 delete fEnergyGrid;
449 */
450 if (fPenelopeFSHelper)
451 fPenelopeFSHelper->ClearTables(IsMaster());
452
453 if (fVerboseLevel > 2)
454 G4cout << "G4PenelopeBremsstrahlungModel: cleared tables" << G4endl;
455
456 return;
457 }
458
459 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
460
461 G4double G4PenelopeBremsstrahlungModel::MinEnergyCut(const G4ParticleDefinition*,
462 const G4MaterialCutsCouple*)
463 {
464 return fIntrinsicLowEnergyLimit;
465 }
466
467 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
468
469 void G4PenelopeBremsstrahlungModel::BuildXSTable(const G4Material* mat,G4double cut)
470 {
471 if (!IsMaster() && !fLocalTable)
472 //Should not be here!
473 G4Exception("G4PenelopeBremsstrahlungModel::BuildXSTable()",
474 "em0100",FatalException,"Worker thread in this method");
475
476 //The key of the map
477 std::pair<const G4Material*,G4double> theKey = std::make_pair(mat,cut);
478
479 //The table already exists
480 if (fXSTableElectron->count(theKey) && fXSTablePositron->count(theKey))
481 return;
482
483 //
484 //This method fills the G4PenelopeCrossSection containers for electrons or positrons
485 //and for the given material/cut couple.
486 //Equivalent of subroutines EBRaT and PINaT of Penelope
487 //
488 if (fVerboseLevel > 2)
489 {
490 G4cout << "G4PenelopeBremsstrahlungModel: going to build cross section table " << G4endl;
491 G4cout << "for e+/e- in " << mat->GetName() << " for Ecut(gamma)= " <<
492 cut/keV << " keV " << G4endl;
493 }
494
495 //Tables have been already created (checked by GetCrossSectionTableForCouple)
496 if (fEnergyGrid->GetVectorLength() != nBins)
497 {
498 G4ExceptionDescription ed;
499 ed << "Energy Grid looks not initialized" << G4endl;
500 ed << nBins << " " << fEnergyGrid->GetVectorLength() << G4endl;
501 G4Exception("G4PenelopeBremsstrahlungModel::BuildXSTable()",
502 "em2016",FatalException,ed);
503 }
504
505 G4PenelopeCrossSection* XSEntry = new G4PenelopeCrossSection(nBins);
506 G4PenelopeCrossSection* XSEntry2 = new G4PenelopeCrossSection(nBins);
507 const G4PhysicsTable* table = fPenelopeFSHelper->GetScaledXSTable(mat,cut);
508
509 //loop on the energy grid
510 for (std::size_t bin=0;bin<nBins;++bin)
511 {
512 G4double energy = fEnergyGrid->GetLowEdgeEnergy(bin);
513 G4double XH0=0, XH1=0, XH2=0;
514 G4double XS0=0, XS1=0, XS2=0;
515
516 //Global xs factor
517 G4double fact = fPenelopeFSHelper->GetEffectiveZSquared(mat)*
518 ((energy+electron_mass_c2)*(energy+electron_mass_c2)/
519 (energy*(energy+2.0*electron_mass_c2)));
520
521 G4double restrictedCut = cut/energy;
522
523 //Now I need the dSigma/dX profile - interpolated on energy - for
524 //the 32-point x grid. Interpolation is log-log
525 std::size_t nBinsX = fPenelopeFSHelper->GetNBinsX();
526 G4double* tempData = new G4double[nBinsX];
527 G4double logene = G4Log(energy);
528 for (std::size_t ix=0;ix<nBinsX;++ix)
529 {
530 //find dSigma/dx for the given E. X belongs to the 32-point grid.
531 G4double val = (*table)[ix]->Value(logene);
532 tempData[ix] = G4Exp(val); //back to the real value!
533 }
534
535 G4double XH0A = 0.;
536 if (restrictedCut <= 1) //calculate only if we are above threshold!
537 XH0A = fPenelopeFSHelper->GetMomentumIntegral(tempData,1.0,-1) -
538 fPenelopeFSHelper->GetMomentumIntegral(tempData,restrictedCut,-1);
539 G4double XS1A = fPenelopeFSHelper->GetMomentumIntegral(tempData,
540 restrictedCut,0);
541 G4double XS2A = fPenelopeFSHelper->GetMomentumIntegral(tempData,
542 restrictedCut,1);
543 G4double XH1A=0, XH2A=0;
544 if (restrictedCut <=1)
545 {
546 XH1A = fPenelopeFSHelper->GetMomentumIntegral(tempData,1.0,0) -
547 XS1A;
548 XH2A = fPenelopeFSHelper->GetMomentumIntegral(tempData,1.0,1) -
549 XS2A;
550 }
551 delete[] tempData;
552
553 XH0 = XH0A*fact;
554 XS1 = XS1A*fact*energy;
555 XH1 = XH1A*fact*energy;
556 XS2 = XS2A*fact*energy*energy;
557 XH2 = XH2A*fact*energy*energy;
558
559 XSEntry->AddCrossSectionPoint(bin,energy,XH0,XH1,XH2,XS0,XS1,XS2);
560
561 //take care of positrons
562 G4double posCorrection = GetPositronXSCorrection(mat,energy);
563 XSEntry2->AddCrossSectionPoint(bin,energy,XH0*posCorrection,
564 XH1*posCorrection,
565 XH2*posCorrection,
566 XS0,
567 XS1*posCorrection,
568 XS2*posCorrection);
569 }
570
571 //Insert in the appropriate table
572 fXSTableElectron->insert(std::make_pair(theKey,XSEntry));
573 fXSTablePositron->insert(std::make_pair(theKey,XSEntry2));
574
575 return;
576 }
577
578
579 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
580
581 G4PenelopeCrossSection*
582 G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple(const G4ParticleDefinition* part,
583 const G4Material* mat,
584 G4double cut)
585 {
586 if (part != G4Electron::Electron() && part != G4Positron::Positron())
587 {
588 G4ExceptionDescription ed;
589 ed << "Invalid particle: " << part->GetParticleName() << G4endl;
590 G4Exception("G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple()",
591 "em0001",FatalException,ed);
592 return nullptr;
593 }
594
595 if (part == G4Electron::Electron())
596 {
597 //Either Initialize() was not called, or we are in a slave and InitializeLocal() was
598 //not invoked
599 if (!fXSTableElectron)
600 {
601 //create a **thread-local** version of the table. Used only for G4EmCalculator and
602 //Unit Tests
603 G4String excep = "The Cross Section Table for e- was not initialized correctly!";
604 G4Exception("G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple()",
605 "em2013",JustWarning,excep);
606 fLocalTable = true;
607 fXSTableElectron = new
608 std::map< std::pair<const G4Material*,G4double>, G4PenelopeCrossSection*>;
609 if (!fEnergyGrid)
610 fEnergyGrid = new G4PhysicsLogVector(LowEnergyLimit(),
611 HighEnergyLimit(),
612 nBins-1); //one hidden bin is added
613 if (!fPenelopeFSHelper)
614 fPenelopeFSHelper = new G4PenelopeBremsstrahlungFS(fVerboseLevel);
615 }
616 std::pair<const G4Material*,G4double> theKey = std::make_pair(mat,cut);
617 if (fXSTableElectron->count(theKey)) //table already built
618 return fXSTableElectron->find(theKey)->second;
619 else
620 {
621 //If we are here, it means that Initialize() was inkoved, but the MaterialTable was
622 //not filled up. This can happen in a UnitTest or via G4EmCalculator
623 if (fVerboseLevel > 0)
624 {
625 //G4Exception (warning) is issued only in verbose mode
626 G4ExceptionDescription ed;
627 ed << "Unable to find e- table for " << mat->GetName() << " at Ecut(gamma)= "
628 << cut/keV << " keV " << G4endl;
629 ed << "This can happen only in Unit Tests or via G4EmCalculator" << G4endl;
630 G4Exception("G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple()",
631 "em2009",JustWarning,ed);
632 }
633 //protect file reading via autolock
634 G4AutoLock lock(&PenelopeBremsstrahlungModelMutex);
635 fPenelopeFSHelper->BuildScaledXSTable(mat,cut,true); //pretend to be a master
636 BuildXSTable(mat,cut);
637 lock.unlock();
638 //now it should be ok
639 return fXSTableElectron->find(theKey)->second;
640 }
641 }
642 if (part == G4Positron::Positron())
643 {
644 //Either Initialize() was not called, or we are in a slave and InitializeLocal() was
645 //not invoked
646 if (!fXSTablePositron)
647 {
648 G4String excep = "The Cross Section Table for e+ was not initialized correctly!";
649 G4Exception("G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple()",
650 "em2013",JustWarning,excep);
651 fLocalTable = true;
652 fXSTablePositron = new
653 std::map< std::pair<const G4Material*,G4double>, G4PenelopeCrossSection*>;
654 if (!fEnergyGrid)
655 fEnergyGrid = new G4PhysicsLogVector(LowEnergyLimit(),
656 HighEnergyLimit(),
657 nBins-1); //one hidden bin is added
658 if (!fPenelopeFSHelper)
659 fPenelopeFSHelper = new G4PenelopeBremsstrahlungFS(fVerboseLevel);
660 }
661 std::pair<const G4Material*,G4double> theKey = std::make_pair(mat,cut);
662 if (fXSTablePositron->count(theKey)) //table already built
663 return fXSTablePositron->find(theKey)->second;
664 else
665 {
666 //If we are here, it means that Initialize() was inkoved, but the MaterialTable was
667 //not filled up. This can happen in a UnitTest or via G4EmCalculator
668 if (fVerboseLevel > 0)
669 {
670 //Issue a G4Exception (warning) only in verbose mode
671 G4ExceptionDescription ed;
672 ed << "Unable to find e+ table for " << mat->GetName() << " at Ecut(gamma)= "
673 << cut/keV << " keV " << G4endl;
674 ed << "This can happen only in Unit Tests or via G4EmCalculator" << G4endl;
675 G4Exception("G4PenelopeBremsstrahlungModel::GetCrossSectionTableForCouple()",
676 "em2009",JustWarning,ed);
677 }
678 //protect file reading via autolock
679 G4AutoLock lock(&PenelopeBremsstrahlungModelMutex);
680 fPenelopeFSHelper->BuildScaledXSTable(mat,cut,true); //pretend to be a master
681 BuildXSTable(mat,cut);
682 lock.unlock();
683 //now it should be ok
684 return fXSTablePositron->find(theKey)->second;
685 }
686 }
687 return nullptr;
688 }
689
690 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
691
692 G4double G4PenelopeBremsstrahlungModel::GetPositronXSCorrection(const G4Material* mat,
693 G4double energy)
694 {
695 //The electron-to-positron correction factor is set equal to the ratio of the
696 //radiative stopping powers for positrons and electrons, which has been calculated
697 //by Kim et al. (1986) (cf. Berger and Seltzer, 1982). Here, it is used an
698 //analytical approximation which reproduces the tabulated values with 0.5%
699 //accuracy
700 G4double t=G4Log(1.0+1e6*energy/
701 (electron_mass_c2*fPenelopeFSHelper->GetEffectiveZSquared(mat)));
702 G4double corr = 1.0-G4Exp(-t*(1.2359e-1-t*(6.1274e-2-t*
703 (3.1516e-2-t*(7.7446e-3-t*(1.0595e-3-t*
704 (7.0568e-5-t*
705 1.8080e-6)))))));
706 return corr;
707 }
708
709 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
710
711 void G4PenelopeBremsstrahlungModel::SetParticle(const G4ParticleDefinition* p)
712 {
713 if(!fParticle) {
714 fParticle = p;
715 }
716 }
717