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: G4Penelope08PhotoElectricModel.cc,v 1.3 2010/03/31 11:12:08 pandola Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
---|
28 | // |
---|
29 | // Author: Luciano Pandola |
---|
30 | // |
---|
31 | // History: |
---|
32 | // -------- |
---|
33 | // 08 Jan 2010 L Pandola First implementation |
---|
34 | |
---|
35 | #include "G4Penelope08PhotoElectricModel.hh" |
---|
36 | #include "G4ParticleDefinition.hh" |
---|
37 | #include "G4MaterialCutsCouple.hh" |
---|
38 | #include "G4ProductionCutsTable.hh" |
---|
39 | #include "G4DynamicParticle.hh" |
---|
40 | #include "G4PhysicsTable.hh" |
---|
41 | #include "G4PhysicsFreeVector.hh" |
---|
42 | #include "G4ElementTable.hh" |
---|
43 | #include "G4Element.hh" |
---|
44 | #include "G4CrossSectionHandler.hh" |
---|
45 | #include "G4AtomicTransitionManager.hh" |
---|
46 | #include "G4AtomicShell.hh" |
---|
47 | #include "G4Gamma.hh" |
---|
48 | #include "G4Electron.hh" |
---|
49 | |
---|
50 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
51 | |
---|
52 | |
---|
53 | G4Penelope08PhotoElectricModel::G4Penelope08PhotoElectricModel(const G4ParticleDefinition*, |
---|
54 | const G4String& nam) |
---|
55 | :G4VEmModel(nam),isInitialised(false),logAtomicShellXS(0) |
---|
56 | { |
---|
57 | fIntrinsicLowEnergyLimit = 100.0*eV; |
---|
58 | fIntrinsicHighEnergyLimit = 100.0*GeV; |
---|
59 | // SetLowEnergyLimit(fIntrinsicLowEnergyLimit); |
---|
60 | SetHighEnergyLimit(fIntrinsicHighEnergyLimit); |
---|
61 | // |
---|
62 | verboseLevel= 0; |
---|
63 | // Verbosity scale: |
---|
64 | // 0 = nothing |
---|
65 | // 1 = warning for energy non-conservation |
---|
66 | // 2 = details of energy budget |
---|
67 | // 3 = calculation of cross sections, file openings, sampling of atoms |
---|
68 | // 4 = entering in methods |
---|
69 | |
---|
70 | //by default the model will inkove the atomic deexcitation |
---|
71 | SetDeexcitationFlag(true); |
---|
72 | ActivateAuger(false); |
---|
73 | } |
---|
74 | |
---|
75 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
76 | |
---|
77 | G4Penelope08PhotoElectricModel::~G4Penelope08PhotoElectricModel() |
---|
78 | { |
---|
79 | std::map <const G4int,G4PhysicsTable*>::iterator i; |
---|
80 | if (logAtomicShellXS) |
---|
81 | { |
---|
82 | for (i=logAtomicShellXS->begin();i != logAtomicShellXS->end();i++) |
---|
83 | { |
---|
84 | G4PhysicsTable* tab = i->second; |
---|
85 | tab->clearAndDestroy(); |
---|
86 | delete tab; |
---|
87 | } |
---|
88 | } |
---|
89 | delete logAtomicShellXS; |
---|
90 | } |
---|
91 | |
---|
92 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
93 | |
---|
94 | void G4Penelope08PhotoElectricModel::Initialise(const G4ParticleDefinition* particle, |
---|
95 | const G4DataVector& cuts) |
---|
96 | { |
---|
97 | if (verboseLevel > 3) |
---|
98 | G4cout << "Calling G4Penelope08PhotoElectricModel::Initialise()" << G4endl; |
---|
99 | |
---|
100 | // logAtomicShellXS is created only once, since it is never cleared |
---|
101 | if (!logAtomicShellXS) |
---|
102 | logAtomicShellXS = new std::map<const G4int,G4PhysicsTable*>; |
---|
103 | |
---|
104 | InitialiseElementSelectors(particle,cuts); |
---|
105 | |
---|
106 | if (verboseLevel > 0) { |
---|
107 | G4cout << "Penelope Photo-Electric model is initialized " << G4endl |
---|
108 | << "Energy range: " |
---|
109 | << LowEnergyLimit() / MeV << " MeV - " |
---|
110 | << HighEnergyLimit() / GeV << " GeV" |
---|
111 | << G4endl; |
---|
112 | } |
---|
113 | |
---|
114 | if(isInitialised) return; |
---|
115 | fParticleChange = GetParticleChangeForGamma(); |
---|
116 | isInitialised = true; |
---|
117 | } |
---|
118 | |
---|
119 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
120 | |
---|
121 | G4double G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom( |
---|
122 | const G4ParticleDefinition*, |
---|
123 | G4double energy, |
---|
124 | G4double Z, G4double, |
---|
125 | G4double, G4double) |
---|
126 | { |
---|
127 | // |
---|
128 | // Penelope model. |
---|
129 | // |
---|
130 | |
---|
131 | if (verboseLevel > 3) |
---|
132 | G4cout << "Calling ComputeCrossSectionPerAtom() of G4Penelope08PhotoElectricModel" << G4endl; |
---|
133 | |
---|
134 | G4int iZ = (G4int) Z; |
---|
135 | |
---|
136 | //read data files |
---|
137 | if (!logAtomicShellXS->count(iZ)) |
---|
138 | ReadDataFile(iZ); |
---|
139 | //now it should be ok |
---|
140 | if (!logAtomicShellXS->count(iZ)) |
---|
141 | { |
---|
142 | G4cout << "Problem in G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom" |
---|
143 | << G4endl; |
---|
144 | G4Exception(); |
---|
145 | } |
---|
146 | |
---|
147 | G4double cross = 0; |
---|
148 | |
---|
149 | G4PhysicsTable* theTable = logAtomicShellXS->find(iZ)->second; |
---|
150 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[0]; |
---|
151 | |
---|
152 | if (!totalXSLog) |
---|
153 | { |
---|
154 | G4cout << "Problem in G4Penelope08PhotoElectricModel::ComputeCrossSectionPerAtom" |
---|
155 | << G4endl; |
---|
156 | G4Exception(); |
---|
157 | } |
---|
158 | G4double logene = log(energy); |
---|
159 | G4double logXS = totalXSLog->Value(logene); |
---|
160 | cross = exp(logXS); |
---|
161 | |
---|
162 | if (verboseLevel > 2) |
---|
163 | G4cout << "Photoelectric cross section at " << energy/MeV << " MeV for Z=" << Z << |
---|
164 | " = " << cross/barn << " barn" << G4endl; |
---|
165 | return cross; |
---|
166 | } |
---|
167 | |
---|
168 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
169 | |
---|
170 | void G4Penelope08PhotoElectricModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
---|
171 | const G4MaterialCutsCouple* couple, |
---|
172 | const G4DynamicParticle* aDynamicGamma, |
---|
173 | G4double, |
---|
174 | G4double) |
---|
175 | { |
---|
176 | // |
---|
177 | // Photoelectric effect, Penelope model |
---|
178 | // |
---|
179 | // The target atom and the target shell are sampled according to the Livermore |
---|
180 | // database |
---|
181 | // D.E. Cullen et al., Report UCRL-50400 (1989) |
---|
182 | // The angular distribution of the electron in the final state is sampled |
---|
183 | // according to the Sauter distribution from |
---|
184 | // F. Sauter, Ann. Phys. 11 (1931) 454 |
---|
185 | // The energy of the final electron is given by the initial photon energy minus |
---|
186 | // the binding energy. Fluorescence de-excitation is subsequently produced |
---|
187 | // (to fill the vacancy) according to the general Geant4 G4DeexcitationManager: |
---|
188 | // J. Stepanek, Comp. Phys. Comm. 1206 pp 1-1-9 (1997) |
---|
189 | |
---|
190 | if (verboseLevel > 3) |
---|
191 | G4cout << "Calling SamplingSecondaries() of G4Penelope08PhotoElectricModel" << G4endl; |
---|
192 | |
---|
193 | G4double photonEnergy = aDynamicGamma->GetKineticEnergy(); |
---|
194 | |
---|
195 | // always kill primary |
---|
196 | fParticleChange->ProposeTrackStatus(fStopAndKill); |
---|
197 | fParticleChange->SetProposedKineticEnergy(0.); |
---|
198 | |
---|
199 | if (photonEnergy <= fIntrinsicLowEnergyLimit) |
---|
200 | { |
---|
201 | fParticleChange->ProposeLocalEnergyDeposit(photonEnergy); |
---|
202 | return ; |
---|
203 | } |
---|
204 | |
---|
205 | G4ParticleMomentum photonDirection = aDynamicGamma->GetMomentumDirection(); |
---|
206 | |
---|
207 | // Select randomly one element in the current material |
---|
208 | if (verboseLevel > 2) |
---|
209 | G4cout << "Going to select element in " << couple->GetMaterial()->GetName() << G4endl; |
---|
210 | |
---|
211 | // atom can be selected efficiently if element selectors are initialised |
---|
212 | const G4Element* anElement = |
---|
213 | SelectRandomAtom(couple,G4Gamma::GammaDefinition(),photonEnergy); |
---|
214 | G4int Z = (G4int) anElement->GetZ(); |
---|
215 | if (verboseLevel > 2) |
---|
216 | G4cout << "Selected " << anElement->GetName() << G4endl; |
---|
217 | |
---|
218 | // Select the ionised shell in the current atom according to shell cross sections |
---|
219 | //shellIndex = 0 --> K shell |
---|
220 | // 1-3 --> L shells |
---|
221 | // 4-8 --> M shells |
---|
222 | // 9 --> outer shells cumulatively |
---|
223 | // |
---|
224 | size_t shellIndex = SelectRandomShell(Z,photonEnergy); |
---|
225 | |
---|
226 | if (verboseLevel > 2) |
---|
227 | G4cout << "Selected shell " << shellIndex << " of element " << anElement->GetName() << G4endl; |
---|
228 | |
---|
229 | // Retrieve the corresponding identifier and binding energy of the selected shell |
---|
230 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
---|
231 | |
---|
232 | //The number of shell cross section possibly reported in the Penelope database |
---|
233 | //might be different from the number of shells in the G4AtomicTransitionManager |
---|
234 | //(namely, Penelope may contain more shell, especially for very light elements). |
---|
235 | //In order to avoid a warning message from the G4AtomicTransitionManager, I |
---|
236 | //add this protection. Results are anyway changed, because when G4AtomicTransitionManager |
---|
237 | //has a shellID>maxID, it sets the shellID to the last valid shell. |
---|
238 | size_t numberOfShells = (size_t) transitionManager->NumberOfShells(Z); |
---|
239 | if (shellIndex >= numberOfShells) |
---|
240 | shellIndex = numberOfShells-1; |
---|
241 | |
---|
242 | const G4AtomicShell* shell = transitionManager->Shell(Z,shellIndex); |
---|
243 | G4double bindingEnergy = shell->BindingEnergy(); |
---|
244 | G4int shellId = shell->ShellId(); |
---|
245 | |
---|
246 | //Penelope considers only K, L and M shells. Cross sections of outer shells are |
---|
247 | //not included in the Penelope database. If SelectRandomShell() returns |
---|
248 | //shellIndex = 9, it means that an outer shell was ionized. In this case the |
---|
249 | //Penelope recipe is to set bindingEnergy = 0 (the energy is entirely assigned |
---|
250 | //to the electron) and to disregard fluorescence. |
---|
251 | if (shellIndex == 9) |
---|
252 | bindingEnergy = 0.*eV; |
---|
253 | |
---|
254 | |
---|
255 | G4double localEnergyDeposit = 0.0; |
---|
256 | G4double cosTheta = 1.0; |
---|
257 | |
---|
258 | // Primary outcoming electron |
---|
259 | G4double eKineticEnergy = photonEnergy - bindingEnergy; |
---|
260 | |
---|
261 | // There may be cases where the binding energy of the selected shell is > photon energy |
---|
262 | // In such cases do not generate secondaries |
---|
263 | if (eKineticEnergy > 0.) |
---|
264 | { |
---|
265 | // The electron is created |
---|
266 | // Direction sampled from the Sauter distribution |
---|
267 | cosTheta = SampleElectronDirection(eKineticEnergy); |
---|
268 | G4double sinTheta = std::sqrt(1-cosTheta*cosTheta); |
---|
269 | G4double phi = twopi * G4UniformRand() ; |
---|
270 | G4double dirx = sinTheta * std::cos(phi); |
---|
271 | G4double diry = sinTheta * std::sin(phi); |
---|
272 | G4double dirz = cosTheta ; |
---|
273 | G4ThreeVector electronDirection(dirx,diry,dirz); //electron direction |
---|
274 | electronDirection.rotateUz(photonDirection); |
---|
275 | G4DynamicParticle* electron = new G4DynamicParticle (G4Electron::Electron(), |
---|
276 | electronDirection, |
---|
277 | eKineticEnergy); |
---|
278 | fvect->push_back(electron); |
---|
279 | } |
---|
280 | else |
---|
281 | { |
---|
282 | bindingEnergy = photonEnergy; |
---|
283 | } |
---|
284 | |
---|
285 | G4double energyInFluorescence = 0; //testing purposes |
---|
286 | |
---|
287 | //Now, take care of fluorescence, if required |
---|
288 | if(DeexcitationFlag() && Z > 5) |
---|
289 | { |
---|
290 | const G4ProductionCutsTable* theCoupleTable= |
---|
291 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
292 | size_t indx = couple->GetIndex(); |
---|
293 | G4double cutG = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx]; |
---|
294 | G4double cutE = (*(theCoupleTable->GetEnergyCutsVector(1)))[indx]; |
---|
295 | |
---|
296 | // Protection to avoid generating photons in the unphysical case of |
---|
297 | // shell binding energy > photon energy |
---|
298 | if (bindingEnergy > cutG || bindingEnergy > cutE) |
---|
299 | { |
---|
300 | deexcitationManager.SetCutForSecondaryPhotons(cutG); |
---|
301 | deexcitationManager.SetCutForAugerElectrons(cutE); |
---|
302 | std::vector<G4DynamicParticle*>* photonVector = |
---|
303 | deexcitationManager.GenerateParticles(Z,shellId); |
---|
304 | //Check for secondaries |
---|
305 | if(photonVector) |
---|
306 | { |
---|
307 | for (size_t k=0; k< photonVector->size(); k++) |
---|
308 | { |
---|
309 | G4DynamicParticle* aPhoton = (*photonVector)[k]; |
---|
310 | if (aPhoton) |
---|
311 | { |
---|
312 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
---|
313 | if (itsEnergy <= bindingEnergy) |
---|
314 | { |
---|
315 | if(aPhoton->GetDefinition() == G4Gamma::Gamma()) |
---|
316 | energyInFluorescence += itsEnergy; |
---|
317 | bindingEnergy -= itsEnergy; |
---|
318 | fvect->push_back(aPhoton); |
---|
319 | } |
---|
320 | else |
---|
321 | { |
---|
322 | delete aPhoton; |
---|
323 | (*photonVector)[k] = 0; |
---|
324 | } |
---|
325 | } |
---|
326 | } |
---|
327 | delete photonVector; |
---|
328 | } |
---|
329 | } |
---|
330 | } |
---|
331 | //Residual energy is deposited locally |
---|
332 | localEnergyDeposit += bindingEnergy; |
---|
333 | |
---|
334 | if (localEnergyDeposit < 0) |
---|
335 | { |
---|
336 | G4cout << "WARNING - " |
---|
337 | << "G4Penelope08PhotoElectric::PostStepDoIt - Negative energy deposit" |
---|
338 | << G4endl; |
---|
339 | localEnergyDeposit = 0; |
---|
340 | } |
---|
341 | |
---|
342 | fParticleChange->ProposeLocalEnergyDeposit(localEnergyDeposit); |
---|
343 | |
---|
344 | if (verboseLevel > 1) |
---|
345 | { |
---|
346 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
347 | G4cout << "Energy balance from G4Penelope08PhotoElectric" << G4endl; |
---|
348 | G4cout << "Selected shell: " << WriteTargetShell(shellIndex) << " of element " << |
---|
349 | anElement->GetName() << G4endl; |
---|
350 | G4cout << "Incoming photon energy: " << photonEnergy/keV << " keV" << G4endl; |
---|
351 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
352 | if (eKineticEnergy) |
---|
353 | G4cout << "Outgoing electron " << eKineticEnergy/keV << " keV" << G4endl; |
---|
354 | G4cout << "Fluorescence: " << energyInFluorescence/keV << " keV" << G4endl; |
---|
355 | G4cout << "Local energy deposit " << localEnergyDeposit/keV << " keV" << G4endl; |
---|
356 | G4cout << "Total final state: " << (eKineticEnergy+energyInFluorescence+localEnergyDeposit)/keV << |
---|
357 | " keV" << G4endl; |
---|
358 | G4cout << "-----------------------------------------------------------" << G4endl; |
---|
359 | } |
---|
360 | if (verboseLevel > 0) |
---|
361 | { |
---|
362 | G4double energyDiff = |
---|
363 | std::fabs(eKineticEnergy+energyInFluorescence+localEnergyDeposit-photonEnergy); |
---|
364 | if (energyDiff > 0.05*keV) |
---|
365 | G4cout << "Warning from G4Penelope08PhotoElectric: problem with energy conservation: " << |
---|
366 | (eKineticEnergy+energyInFluorescence+localEnergyDeposit)/keV |
---|
367 | << " keV (final) vs. " << |
---|
368 | photonEnergy/keV << " keV (initial)" << G4endl; |
---|
369 | } |
---|
370 | } |
---|
371 | |
---|
372 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
373 | |
---|
374 | void G4Penelope08PhotoElectricModel::ActivateAuger(G4bool augerbool) |
---|
375 | { |
---|
376 | if (!DeexcitationFlag() && augerbool) |
---|
377 | { |
---|
378 | G4cout << "WARNING - G4Penelope08PhotoElectricModel" << G4endl; |
---|
379 | G4cout << "The use of the Atomic Deexcitation Manager is set to false " << G4endl; |
---|
380 | G4cout << "Therefore, Auger electrons will be not generated anyway" << G4endl; |
---|
381 | } |
---|
382 | deexcitationManager.ActivateAugerElectronProduction(augerbool); |
---|
383 | if (verboseLevel > 1) |
---|
384 | G4cout << "Auger production set to " << augerbool << G4endl; |
---|
385 | } |
---|
386 | |
---|
387 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
388 | |
---|
389 | G4double G4Penelope08PhotoElectricModel::SampleElectronDirection(G4double energy) |
---|
390 | { |
---|
391 | G4double costheta = 1.0; |
---|
392 | if (energy>1*GeV) return costheta; |
---|
393 | |
---|
394 | //1) initialize energy-dependent variables |
---|
395 | // Variable naming according to Eq. (2.24) of Penelope Manual |
---|
396 | // (pag. 44) |
---|
397 | G4double gamma = 1.0 + energy/electron_mass_c2; |
---|
398 | G4double gamma2 = gamma*gamma; |
---|
399 | G4double beta = std::sqrt((gamma2-1.0)/gamma2); |
---|
400 | |
---|
401 | // ac corresponds to "A" of Eq. (2.31) |
---|
402 | // |
---|
403 | G4double ac = (1.0/beta) - 1.0; |
---|
404 | G4double a1 = 0.5*beta*gamma*(gamma-1.0)*(gamma-2.0); |
---|
405 | G4double a2 = ac + 2.0; |
---|
406 | G4double gtmax = 2.0*(a1 + 1.0/ac); |
---|
407 | |
---|
408 | G4double tsam = 0; |
---|
409 | G4double gtr = 0; |
---|
410 | |
---|
411 | //2) sampling. Eq. (2.31) of Penelope Manual |
---|
412 | // tsam = 1-std::cos(theta) |
---|
413 | // gtr = rejection function according to Eq. (2.28) |
---|
414 | do{ |
---|
415 | G4double rand = G4UniformRand(); |
---|
416 | tsam = 2.0*ac * (2.0*rand + a2*std::sqrt(rand)) / (a2*a2 - 4.0*rand); |
---|
417 | gtr = (2.0 - tsam) * (a1 + 1.0/(ac+tsam)); |
---|
418 | }while(G4UniformRand()*gtmax > gtr); |
---|
419 | costheta = 1.0-tsam; |
---|
420 | |
---|
421 | |
---|
422 | return costheta; |
---|
423 | } |
---|
424 | |
---|
425 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
426 | |
---|
427 | void G4Penelope08PhotoElectricModel::ReadDataFile(G4int Z) |
---|
428 | { |
---|
429 | if (verboseLevel > 2) |
---|
430 | { |
---|
431 | G4cout << "G4Penelope08PhotoElectricModel::ReadDataFile()" << G4endl; |
---|
432 | G4cout << "Going to read PhotoElectric data files for Z=" << Z << G4endl; |
---|
433 | } |
---|
434 | |
---|
435 | char* path = getenv("G4LEDATA"); |
---|
436 | if (!path) |
---|
437 | { |
---|
438 | G4String excep = "G4Penelope08PhotoElectricModel - G4LEDATA environment variable not set!"; |
---|
439 | G4Exception(excep); |
---|
440 | } |
---|
441 | |
---|
442 | /* |
---|
443 | Read the cross section file |
---|
444 | */ |
---|
445 | std::ostringstream ost; |
---|
446 | if (Z>9) |
---|
447 | ost << path << "/penelope/photoelectric/pdgph" << Z << ".p08"; |
---|
448 | else |
---|
449 | ost << path << "/penelope/photoelectric/pdgph0" << Z << ".p08"; |
---|
450 | std::ifstream file(ost.str().c_str()); |
---|
451 | if (!file.is_open()) |
---|
452 | { |
---|
453 | G4String excep = "G4Penelope08PhotoElectricModel - data file " + G4String(ost.str()) + " not found!"; |
---|
454 | G4Exception(excep); |
---|
455 | } |
---|
456 | //I have to know in advance how many points are in the data list |
---|
457 | //to initialize the G4PhysicsFreeVector() |
---|
458 | size_t ndata=0; |
---|
459 | G4String line; |
---|
460 | while( getline(file, line) ) |
---|
461 | ndata++; |
---|
462 | ndata -= 1; |
---|
463 | //G4cout << "Found: " << ndata << " lines" << G4endl; |
---|
464 | |
---|
465 | file.clear(); |
---|
466 | file.close(); |
---|
467 | file.open(ost.str().c_str()); |
---|
468 | |
---|
469 | G4int readZ =0; |
---|
470 | size_t nShells= 0; |
---|
471 | file >> readZ >> nShells; |
---|
472 | |
---|
473 | if (verboseLevel > 3) |
---|
474 | G4cout << "Element Z=" << Z << " , nShells = " << nShells << G4endl; |
---|
475 | |
---|
476 | //check the right file is opened. |
---|
477 | if (readZ != Z || nShells <= 0) |
---|
478 | { |
---|
479 | G4cout << "G4Penelope08PhotoElectricModel::ReadDataFile()" << G4endl; |
---|
480 | G4cout << "Corrupted data file for Z=" << Z << G4endl; |
---|
481 | G4Exception(); |
---|
482 | } |
---|
483 | G4PhysicsTable* thePhysicsTable = new G4PhysicsTable(); |
---|
484 | |
---|
485 | //the table has to contain nShell+1 G4PhysicsFreeVectors, |
---|
486 | //(theTable)[0] --> total cross section |
---|
487 | //(theTable)[ishell] --> cross section for shell (ishell-1) |
---|
488 | |
---|
489 | |
---|
490 | |
---|
491 | //reserve space for the vectors |
---|
492 | //everything is log-log |
---|
493 | for (size_t i=0;i<nShells+1;i++) |
---|
494 | thePhysicsTable->push_back(new G4PhysicsFreeVector(ndata)); |
---|
495 | |
---|
496 | size_t k =0; |
---|
497 | for (k=0;k<ndata && !file.eof();k++) |
---|
498 | { |
---|
499 | G4double energy = 0; |
---|
500 | G4double aValue = 0; |
---|
501 | file >> energy ; |
---|
502 | energy *= eV; |
---|
503 | G4double logene = log(energy); |
---|
504 | //loop on the columns |
---|
505 | for (size_t i=0;i<nShells+1;i++) |
---|
506 | { |
---|
507 | file >> aValue; |
---|
508 | aValue *= barn; |
---|
509 | G4PhysicsFreeVector* theVec = (G4PhysicsFreeVector*) ((*thePhysicsTable)[i]); |
---|
510 | if (aValue < 1e-40*cm2) //protection against log(0) |
---|
511 | aValue = 1e-40*cm2; |
---|
512 | theVec->PutValue(k,logene,log(aValue)); |
---|
513 | } |
---|
514 | } |
---|
515 | |
---|
516 | if (verboseLevel > 2) |
---|
517 | { |
---|
518 | G4cout << "G4Penelope08PhotoElectricModel: read " << k << " points for element Z = " |
---|
519 | << Z << G4endl; |
---|
520 | } |
---|
521 | |
---|
522 | logAtomicShellXS->insert(std::make_pair(Z,thePhysicsTable)); |
---|
523 | |
---|
524 | file.close(); |
---|
525 | return; |
---|
526 | } |
---|
527 | |
---|
528 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
529 | |
---|
530 | size_t G4Penelope08PhotoElectricModel::SelectRandomShell(G4int Z,G4double energy) |
---|
531 | { |
---|
532 | G4double logEnergy = log(energy); |
---|
533 | |
---|
534 | //Check if data have been read (it should be!) |
---|
535 | if (!logAtomicShellXS->count(Z)) |
---|
536 | { |
---|
537 | G4cout << "Problem in G4Penelope08PhotoElectricModel::SelectRandomShell" << G4endl; |
---|
538 | G4cout << "Cannot find data for Z=" << Z << G4endl; |
---|
539 | G4Exception(); |
---|
540 | } |
---|
541 | |
---|
542 | size_t shellIndex = 0; |
---|
543 | |
---|
544 | G4PhysicsTable* theTable = logAtomicShellXS->find(Z)->second; |
---|
545 | |
---|
546 | G4DataVector* tempVector = new G4DataVector(); |
---|
547 | |
---|
548 | G4double sum = 0; |
---|
549 | //loop on shell partial XS, retrieve the value for the given energy and store on |
---|
550 | //a temporary vector |
---|
551 | tempVector->push_back(sum); //first element is zero |
---|
552 | |
---|
553 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[0]; |
---|
554 | G4double logXS = totalXSLog->Value(logEnergy); |
---|
555 | G4double totalXS = exp(logXS); |
---|
556 | |
---|
557 | //Notice: totalXS is the total cross section and it does *not* correspond to |
---|
558 | //the sum of partialXS's, since these include only K, L and M shells. |
---|
559 | // |
---|
560 | // Therefore, here one have to consider the possibility of ionisation of |
---|
561 | // an outer shell. Conventionally, it is indicated with id=10 in Penelope |
---|
562 | // |
---|
563 | |
---|
564 | for (size_t k=1;k<theTable->entries();k++) |
---|
565 | { |
---|
566 | G4PhysicsFreeVector* partialXSLog = (G4PhysicsFreeVector*) (*theTable)[k]; |
---|
567 | G4double logXS = partialXSLog->Value(logEnergy); |
---|
568 | G4double partialXS = exp(logXS); |
---|
569 | sum += partialXS; |
---|
570 | tempVector->push_back(sum); |
---|
571 | } |
---|
572 | |
---|
573 | tempVector->push_back(totalXS); //last element |
---|
574 | |
---|
575 | G4double random = G4UniformRand()*totalXS; |
---|
576 | |
---|
577 | /* |
---|
578 | for (size_t i=0;i<tempVector->size(); i++) |
---|
579 | G4cout << i << " " << (*tempVector)[i]/totalXS << G4endl; |
---|
580 | */ |
---|
581 | |
---|
582 | //locate bin of tempVector |
---|
583 | //Now one has to sample according to the elements in tempVector |
---|
584 | //This gives the left edge of the interval... |
---|
585 | size_t lowerBound = 0; |
---|
586 | size_t upperBound = tempVector->size()-1; |
---|
587 | while (lowerBound <= upperBound) |
---|
588 | { |
---|
589 | size_t midBin = (lowerBound + upperBound)/2; |
---|
590 | if( random < (*tempVector)[midBin]) |
---|
591 | upperBound = midBin-1; |
---|
592 | else |
---|
593 | lowerBound = midBin+1; |
---|
594 | } |
---|
595 | |
---|
596 | shellIndex = upperBound; |
---|
597 | |
---|
598 | delete tempVector; |
---|
599 | return shellIndex; |
---|
600 | } |
---|
601 | |
---|
602 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
603 | |
---|
604 | size_t G4Penelope08PhotoElectricModel::GetNumberOfShellXS(G4int Z) |
---|
605 | { |
---|
606 | //read data files |
---|
607 | if (!logAtomicShellXS->count(Z)) |
---|
608 | ReadDataFile(Z); |
---|
609 | //now it should be ok |
---|
610 | if (!logAtomicShellXS->count(Z)) |
---|
611 | { |
---|
612 | G4cout << "Problem in G4Penelope08PhotoElectricModel::GetNumberOfShellXS()" |
---|
613 | << G4endl; |
---|
614 | G4Exception(); |
---|
615 | } |
---|
616 | //one vector is allocated for the _total_ cross section |
---|
617 | size_t nEntries = logAtomicShellXS->find(Z)->second->entries(); |
---|
618 | return (nEntries-1); |
---|
619 | } |
---|
620 | |
---|
621 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
622 | |
---|
623 | G4double G4Penelope08PhotoElectricModel::GetShellCrossSection(G4int Z,size_t shellID,G4double energy) |
---|
624 | { |
---|
625 | //this forces also the loading of the data |
---|
626 | size_t entries = GetNumberOfShellXS(Z); |
---|
627 | |
---|
628 | if (shellID >= entries) |
---|
629 | { |
---|
630 | G4cout << "Element Z=" << Z << " has data for " << entries << " shells only" << G4endl; |
---|
631 | G4cout << "so shellID should be from 0 to " << entries-1 << G4endl; |
---|
632 | return 0; |
---|
633 | } |
---|
634 | |
---|
635 | G4PhysicsTable* theTable = logAtomicShellXS->find(Z)->second; |
---|
636 | //[0] is the total XS, shellID is in the element [shellID+1] |
---|
637 | G4PhysicsFreeVector* totalXSLog = (G4PhysicsFreeVector*) (*theTable)[shellID+1]; |
---|
638 | |
---|
639 | if (!totalXSLog) |
---|
640 | { |
---|
641 | G4cout << "Problem in G4Penelope08PhotoElectricModel::GetShellCrossSection()" |
---|
642 | << G4endl; |
---|
643 | G4Exception(); |
---|
644 | } |
---|
645 | G4double logene = log(energy); |
---|
646 | G4double logXS = totalXSLog->Value(logene); |
---|
647 | G4double cross = exp(logXS); |
---|
648 | if (cross < 2e-40*cm2) cross = 0; |
---|
649 | return cross; |
---|
650 | } |
---|
651 | |
---|
652 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
653 | |
---|
654 | G4String G4Penelope08PhotoElectricModel::WriteTargetShell(size_t shellID) |
---|
655 | { |
---|
656 | G4String theShell = "outer shell"; |
---|
657 | if (shellID == 0) |
---|
658 | theShell = "K"; |
---|
659 | else if (shellID == 1) |
---|
660 | theShell = "L1"; |
---|
661 | else if (shellID == 2) |
---|
662 | theShell = "L2"; |
---|
663 | else if (shellID == 3) |
---|
664 | theShell = "L3"; |
---|
665 | else if (shellID == 4) |
---|
666 | theShell = "M1"; |
---|
667 | else if (shellID == 5) |
---|
668 | theShell = "M2"; |
---|
669 | else if (shellID == 6) |
---|
670 | theShell = "M3"; |
---|
671 | else if (shellID == 7) |
---|
672 | theShell = "M4"; |
---|
673 | else if (shellID == 8) |
---|
674 | theShell = "M5"; |
---|
675 | |
---|
676 | return theShell; |
---|
677 | } |
---|