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 | // $Id: G4LivermorePhotoElectricModel.cc,v 1.1 2008/10/30 14:16:35 sincerti Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-02 $ |
---|
28 | // |
---|
29 | |
---|
30 | #include "G4LivermorePhotoElectricModel.hh" |
---|
31 | |
---|
32 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
33 | |
---|
34 | using namespace std; |
---|
35 | |
---|
36 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
37 | |
---|
38 | G4LivermorePhotoElectricModel::G4LivermorePhotoElectricModel(const G4ParticleDefinition*, |
---|
39 | const G4String& nam) |
---|
40 | :G4VEmModel(nam),isInitialised(false) |
---|
41 | { |
---|
42 | lowEnergyLimit = 250 * eV; // SI - Could be 10 eV ? |
---|
43 | highEnergyLimit = 100 * GeV; |
---|
44 | SetLowEnergyLimit(lowEnergyLimit); |
---|
45 | SetHighEnergyLimit(highEnergyLimit); |
---|
46 | |
---|
47 | G4cout << "Livermore Compton is constructed " << G4endl |
---|
48 | << "Energy range: " |
---|
49 | << lowEnergyLimit / keV << " keV - " |
---|
50 | << highEnergyLimit / GeV << " GeV" |
---|
51 | << G4endl; |
---|
52 | |
---|
53 | verboseLevel= 0; |
---|
54 | // Verbosity scale: |
---|
55 | // 0 = nothing |
---|
56 | // 1 = warning for energy non-conservation |
---|
57 | // 2 = details of energy budget |
---|
58 | // 3 = calculation of cross sections, file openings, sampling of atoms |
---|
59 | // 4 = entering in methods |
---|
60 | } |
---|
61 | |
---|
62 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
63 | |
---|
64 | G4LivermorePhotoElectricModel::~G4LivermorePhotoElectricModel() |
---|
65 | { |
---|
66 | delete meanFreePathTable; |
---|
67 | delete crossSectionHandler; |
---|
68 | delete shellCrossSectionHandler; |
---|
69 | delete ElectronAngularGenerator; |
---|
70 | } |
---|
71 | |
---|
72 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
73 | |
---|
74 | void G4LivermorePhotoElectricModel::Initialise(const G4ParticleDefinition* particle, |
---|
75 | const G4DataVector& cuts) |
---|
76 | { |
---|
77 | if (verboseLevel > 3) |
---|
78 | G4cout << "Calling G4LivermorePhotoElectricModel::Initialise()" << G4endl; |
---|
79 | |
---|
80 | InitialiseElementSelectors(particle,cuts); |
---|
81 | |
---|
82 | // Energy limits |
---|
83 | |
---|
84 | if (LowEnergyLimit() < lowEnergyLimit) |
---|
85 | { |
---|
86 | G4cout << "G4LivermorePhotoElectricModel: low energy limit increased from " << |
---|
87 | LowEnergyLimit()/eV << " eV to " << lowEnergyLimit << " eV" << |
---|
88 | G4endl; |
---|
89 | SetLowEnergyLimit(lowEnergyLimit); |
---|
90 | } |
---|
91 | |
---|
92 | if (HighEnergyLimit() > highEnergyLimit) |
---|
93 | { |
---|
94 | G4cout << "G4LivermorePhotoElectricModel: high energy limit decreased from " << |
---|
95 | HighEnergyLimit()/GeV << " GeV to " << highEnergyLimit << " GeV" |
---|
96 | << G4endl; |
---|
97 | SetHighEnergyLimit(highEnergyLimit); |
---|
98 | } |
---|
99 | |
---|
100 | // Read data tables for all materials |
---|
101 | |
---|
102 | crossSectionHandler = new G4CrossSectionHandler(); |
---|
103 | crossSectionHandler->Clear(); |
---|
104 | G4String crossSectionFile = "phot/pe-cs-"; |
---|
105 | crossSectionHandler->LoadData(crossSectionFile); |
---|
106 | |
---|
107 | meanFreePathTable = 0; |
---|
108 | meanFreePathTable = crossSectionHandler->BuildMeanFreePathForMaterials(); |
---|
109 | |
---|
110 | shellCrossSectionHandler = new G4CrossSectionHandler(); |
---|
111 | shellCrossSectionHandler->Clear(); |
---|
112 | G4String shellCrossSectionFile = "phot/pe-ss-cs-"; |
---|
113 | shellCrossSectionHandler->LoadShellData(shellCrossSectionFile); |
---|
114 | |
---|
115 | // SI - Buggy default ? |
---|
116 | //generatorName = "geant4.6.2"; |
---|
117 | //ElectronAngularGenerator = new G4PhotoElectricAngularGeneratorSimple("GEANTSimpleGenerator"); // default generator |
---|
118 | |
---|
119 | // |
---|
120 | |
---|
121 | if (verboseLevel > 2) |
---|
122 | G4cout << "Loaded cross section files for Livermore PhotoElectric model" << G4endl; |
---|
123 | |
---|
124 | G4cout << "Livermore PhotoElectric model is initialized " << G4endl |
---|
125 | << "Energy range: " |
---|
126 | << LowEnergyLimit() / keV << " keV - " |
---|
127 | << HighEnergyLimit() / GeV << " GeV" |
---|
128 | << G4endl; |
---|
129 | |
---|
130 | if(isInitialised) return; |
---|
131 | |
---|
132 | if(pParticleChange) |
---|
133 | fParticleChange = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange); |
---|
134 | else |
---|
135 | fParticleChange = new G4ParticleChangeForGamma(); |
---|
136 | |
---|
137 | isInitialised = true; |
---|
138 | } |
---|
139 | |
---|
140 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
141 | |
---|
142 | G4double G4LivermorePhotoElectricModel::ComputeCrossSectionPerAtom( |
---|
143 | const G4ParticleDefinition*, |
---|
144 | G4double GammaEnergy, |
---|
145 | G4double Z, G4double, |
---|
146 | G4double, G4double) |
---|
147 | { |
---|
148 | if (verboseLevel > 3) |
---|
149 | G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermorePhotoElectricModel" << G4endl; |
---|
150 | |
---|
151 | G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy); |
---|
152 | return cs; |
---|
153 | } |
---|
154 | |
---|
155 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
156 | |
---|
157 | void G4LivermorePhotoElectricModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
---|
158 | const G4MaterialCutsCouple* couple, |
---|
159 | const G4DynamicParticle* aDynamicGamma, |
---|
160 | G4double, |
---|
161 | G4double) |
---|
162 | { |
---|
163 | |
---|
164 | // Fluorescence generated according to: |
---|
165 | // J. Stepanek ,"A program to determine the radiation spectra due to a single atomic |
---|
166 | // subshell ionisation by a particle or due to deexcitation or decay of radionuclides", |
---|
167 | // Comp. Phys. Comm. 1206 pp 1-1-9 (1997) |
---|
168 | |
---|
169 | if (verboseLevel > 3) |
---|
170 | G4cout << "Calling SampleSecondaries() of G4LivermorePhotoElectricModel" << G4endl; |
---|
171 | |
---|
172 | G4double photonEnergy = aDynamicGamma->GetKineticEnergy(); |
---|
173 | |
---|
174 | if (photonEnergy <= lowEnergyLimit) |
---|
175 | { |
---|
176 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
---|
177 | fParticleChange->SetProposedKineticEnergy(0.); |
---|
178 | fParticleChange->ProposeLocalEnergyDeposit(photonEnergy); |
---|
179 | // SI - IS THE FOLLOWING RETURN NECESSARY ? |
---|
180 | return ; |
---|
181 | } |
---|
182 | |
---|
183 | G4ThreeVector photonDirection = aDynamicGamma->GetMomentumDirection(); // Returns the normalized direction of the momentum |
---|
184 | |
---|
185 | // Select randomly one element in the current material |
---|
186 | G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy); |
---|
187 | |
---|
188 | // Select the ionised shell in the current atom according to shell cross sections |
---|
189 | size_t shellIndex = shellCrossSectionHandler->SelectRandomShell(Z,photonEnergy); |
---|
190 | |
---|
191 | // Retrieve the corresponding identifier and binding energy of the selected shell |
---|
192 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
---|
193 | const G4AtomicShell* shell = transitionManager->Shell(Z,shellIndex); |
---|
194 | G4double bindingEnergy = shell->BindingEnergy(); |
---|
195 | G4int shellId = shell->ShellId(); |
---|
196 | |
---|
197 | // Create lists of pointers to DynamicParticles (photons and electrons) |
---|
198 | // (Is the electron vector necessary? To be checked) |
---|
199 | std::vector<G4DynamicParticle*>* photonVector = 0; |
---|
200 | std::vector<G4DynamicParticle*> electronVector; |
---|
201 | |
---|
202 | G4double energyDeposit = 0.0; |
---|
203 | |
---|
204 | // Primary outcoming electron |
---|
205 | G4double eKineticEnergy = photonEnergy - bindingEnergy; |
---|
206 | |
---|
207 | // There may be cases where the binding energy of the selected shell is > photon energy |
---|
208 | // In such cases do not generate secondaries |
---|
209 | if (eKineticEnergy > 0.) |
---|
210 | { |
---|
211 | // SI - Removed safety |
---|
212 | |
---|
213 | // Generate the electron only if with large enough range w.r.t. cuts and safety |
---|
214 | //G4double safety = aStep.GetPostStepPoint()->GetSafety(); |
---|
215 | |
---|
216 | //if (rangeTest->Escape(G4Electron::Electron(),couple,eKineticEnergy,safety)) |
---|
217 | { |
---|
218 | |
---|
219 | // Calculate direction of the photoelectron |
---|
220 | G4ThreeVector gammaPolarization = aDynamicGamma->GetPolarization(); |
---|
221 | G4ThreeVector electronDirection = ElectronAngularGenerator->GetPhotoElectronDirection(photonDirection,eKineticEnergy,gammaPolarization,shellId); |
---|
222 | |
---|
223 | // The electron is created ... |
---|
224 | G4DynamicParticle* electron = new G4DynamicParticle (G4Electron::Electron(), |
---|
225 | electronDirection, |
---|
226 | eKineticEnergy); |
---|
227 | electronVector.push_back(electron); |
---|
228 | } |
---|
229 | /*else |
---|
230 | { |
---|
231 | energyDeposit += eKineticEnergy; |
---|
232 | }*/ |
---|
233 | } |
---|
234 | else |
---|
235 | { |
---|
236 | bindingEnergy = photonEnergy; |
---|
237 | } |
---|
238 | |
---|
239 | G4int nElectrons = electronVector.size(); |
---|
240 | size_t nTotPhotons = 0; |
---|
241 | G4int nPhotons=0; |
---|
242 | const G4ProductionCutsTable* theCoupleTable= |
---|
243 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
244 | |
---|
245 | size_t index = couple->GetIndex(); |
---|
246 | G4double cutg = (*(theCoupleTable->GetEnergyCutsVector(0)))[index]; |
---|
247 | cutg = std::min(cutForLowEnergySecondaryPhotons,cutg); |
---|
248 | |
---|
249 | G4double cute = (*(theCoupleTable->GetEnergyCutsVector(1)))[index]; |
---|
250 | cute = std::min(cutForLowEnergySecondaryPhotons,cute); |
---|
251 | |
---|
252 | G4DynamicParticle* aPhoton; |
---|
253 | |
---|
254 | // Generation of fluorescence |
---|
255 | // Data in EADL are available only for Z > 5 |
---|
256 | // Protection to avoid generating photons in the unphysical case of |
---|
257 | // shell binding energy > photon energy |
---|
258 | if (Z > 5 && (bindingEnergy > cutg || bindingEnergy > cute)) |
---|
259 | { |
---|
260 | photonVector = deexcitationManager.GenerateParticles(Z,shellId); |
---|
261 | nTotPhotons = photonVector->size(); |
---|
262 | for (size_t k=0; k<nTotPhotons; k++) |
---|
263 | { |
---|
264 | aPhoton = (*photonVector)[k]; |
---|
265 | if (aPhoton) |
---|
266 | { |
---|
267 | G4double itsCut = cutg; |
---|
268 | if(aPhoton->GetDefinition() == G4Electron::Electron()) itsCut = cute; |
---|
269 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
---|
270 | |
---|
271 | if (itsEnergy > itsCut && itsEnergy <= bindingEnergy) |
---|
272 | { |
---|
273 | nPhotons++; |
---|
274 | // Local energy deposit is given as the sum of the |
---|
275 | // energies of incident photons minus the energies |
---|
276 | // of the outcoming fluorescence photons |
---|
277 | bindingEnergy -= itsEnergy; |
---|
278 | |
---|
279 | } |
---|
280 | else |
---|
281 | { |
---|
282 | delete aPhoton; |
---|
283 | (*photonVector)[k] = 0; |
---|
284 | } |
---|
285 | } |
---|
286 | } |
---|
287 | } |
---|
288 | |
---|
289 | energyDeposit += bindingEnergy; |
---|
290 | |
---|
291 | // Final state |
---|
292 | |
---|
293 | for (G4int l = 0; l<nElectrons; l++ ) |
---|
294 | { |
---|
295 | aPhoton = electronVector[l]; |
---|
296 | if(aPhoton) { |
---|
297 | fvect->push_back(aPhoton); |
---|
298 | } |
---|
299 | } |
---|
300 | for ( size_t ll = 0; ll < nTotPhotons; ll++) |
---|
301 | { |
---|
302 | aPhoton = (*photonVector)[ll]; |
---|
303 | if(aPhoton) { |
---|
304 | fvect->push_back(aPhoton); |
---|
305 | } |
---|
306 | } |
---|
307 | |
---|
308 | delete photonVector; |
---|
309 | |
---|
310 | if (energyDeposit < 0) |
---|
311 | { |
---|
312 | G4cout << "WARNING - " |
---|
313 | << "G4LowEnergyPhotoElectric::PostStepDoIt - Negative energy deposit" |
---|
314 | << G4endl; |
---|
315 | energyDeposit = 0; |
---|
316 | } |
---|
317 | |
---|
318 | // kill incident photon |
---|
319 | fParticleChange->ProposeMomentumDirection( 0., 0., 0. ); |
---|
320 | fParticleChange->SetProposedKineticEnergy(0.); |
---|
321 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
---|
322 | fParticleChange->ProposeLocalEnergyDeposit(energyDeposit); |
---|
323 | } |
---|
324 | |
---|
325 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
326 | |
---|
327 | void G4LivermorePhotoElectricModel::SetCutForLowEnSecPhotons(G4double cut) |
---|
328 | { |
---|
329 | cutForLowEnergySecondaryPhotons = cut; |
---|
330 | deexcitationManager.SetCutForSecondaryPhotons(cut); |
---|
331 | } |
---|
332 | |
---|
333 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
334 | |
---|
335 | void G4LivermorePhotoElectricModel::SetCutForLowEnSecElectrons(G4double cut) |
---|
336 | { |
---|
337 | cutForLowEnergySecondaryElectrons = cut; |
---|
338 | deexcitationManager.SetCutForAugerElectrons(cut); |
---|
339 | } |
---|
340 | |
---|
341 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
342 | |
---|
343 | void G4LivermorePhotoElectricModel::ActivateAuger(G4bool val) |
---|
344 | { |
---|
345 | deexcitationManager.ActivateAugerElectronProduction(val); |
---|
346 | } |
---|
347 | |
---|
348 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
349 | |
---|
350 | void G4LivermorePhotoElectricModel::SetAngularGenerator(G4VPhotoElectricAngularDistribution* distribution) |
---|
351 | { |
---|
352 | ElectronAngularGenerator = distribution; |
---|
353 | ElectronAngularGenerator->PrintGeneratorInformation(); |
---|
354 | } |
---|
355 | |
---|
356 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
357 | |
---|
358 | void G4LivermorePhotoElectricModel::SetAngularGenerator(const G4String& name) |
---|
359 | { |
---|
360 | if (name == "default") |
---|
361 | { |
---|
362 | delete ElectronAngularGenerator; |
---|
363 | ElectronAngularGenerator = new G4PhotoElectricAngularGeneratorSimple("GEANT4LowEnergySimpleGenerator"); |
---|
364 | generatorName = name; |
---|
365 | } |
---|
366 | else if (name == "standard") |
---|
367 | { |
---|
368 | delete ElectronAngularGenerator; |
---|
369 | ElectronAngularGenerator = new G4PhotoElectricAngularGeneratorSauterGavrila("GEANT4SauterGavrilaGenerator"); |
---|
370 | generatorName = name; |
---|
371 | } |
---|
372 | else if (name == "polarized") |
---|
373 | { |
---|
374 | delete ElectronAngularGenerator; |
---|
375 | ElectronAngularGenerator = new G4PhotoElectricAngularGeneratorPolarized("GEANT4LowEnergyPolarizedGenerator"); |
---|
376 | generatorName = name; |
---|
377 | } |
---|
378 | else |
---|
379 | { |
---|
380 | G4Exception("G4LowEnergyPhotoElectric::SetAngularGenerator - generator does not exist"); |
---|
381 | } |
---|
382 | |
---|
383 | ElectronAngularGenerator->PrintGeneratorInformation(); |
---|
384 | } |
---|
385 | |
---|
386 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
387 | |
---|
388 | G4double G4LivermorePhotoElectricModel::GetMeanFreePath(const G4Track& track, |
---|
389 | G4double, // previousStepSize |
---|
390 | G4ForceCondition*) |
---|
391 | { |
---|
392 | const G4DynamicParticle* photon = track.GetDynamicParticle(); |
---|
393 | G4double energy = photon->GetKineticEnergy(); |
---|
394 | G4Material* material = track.GetMaterial(); |
---|
395 | // size_t materialIndex = material->GetIndex(); |
---|
396 | |
---|
397 | G4double meanFreePath = DBL_MAX; |
---|
398 | |
---|
399 | // if (energy > highEnergyLimit) |
---|
400 | // meanFreePath = meanFreePathTable->FindValue(highEnergyLimit,materialIndex); |
---|
401 | // else if (energy < lowEnergyLimit) meanFreePath = DBL_MAX; |
---|
402 | // else meanFreePath = meanFreePathTable->FindValue(energy,materialIndex); |
---|
403 | |
---|
404 | G4double cross = shellCrossSectionHandler->ValueForMaterial(material,energy); |
---|
405 | if(cross > 0.0) meanFreePath = 1.0/cross; |
---|
406 | |
---|
407 | return meanFreePath; |
---|
408 | } |
---|
409 | |
---|