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: G4PenelopeIonisation.cc,v 1.22 2009/06/11 15:47:08 mantero Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
---|
28 | // |
---|
29 | // -------------------------------------------------------------- |
---|
30 | // |
---|
31 | // File name: G4PenelopeIonisation |
---|
32 | // |
---|
33 | // Author: Luciano Pandola |
---|
34 | // |
---|
35 | // Creation date: March 2003 |
---|
36 | // |
---|
37 | // Modifications: |
---|
38 | // |
---|
39 | // 25.03.03 L.Pandola First implementation |
---|
40 | // 03.06.03 L.Pandola Added continuous part |
---|
41 | // 30.06.03 L.Pandola Added positrons |
---|
42 | // 01.07.03 L.Pandola Changed cross section files for e- and e+ |
---|
43 | // Interface with PenelopeCrossSectionHandler |
---|
44 | // 18.01.04 M.Mendenhall (Vanderbilt University) [bug report 568] |
---|
45 | // Changed returns in CalculateDiscreteForElectrons() |
---|
46 | // to eliminate leaks |
---|
47 | // 20.01.04 L.Pandola Changed returns in CalculateDiscreteForPositrons() |
---|
48 | // to eliminate the same bug |
---|
49 | // 10.03.04 L.Pandola Bug fixed with reference system of delta rays |
---|
50 | // 17.03.04 L.Pandola Removed unnecessary calls to std::pow(a,b) |
---|
51 | // 18.03.04 L.Pandola Bug fixed in the destructor |
---|
52 | // 01.06.04 L.Pandola StopButAlive for positrons on PostStepDoIt |
---|
53 | // 10.03.05 L.Pandola Fix of bug report 729. The solution works but it is |
---|
54 | // quite un-elegant. Something better to be found. |
---|
55 | // -------------------------------------------------------------- |
---|
56 | |
---|
57 | #include "G4PenelopeIonisation.hh" |
---|
58 | #include "G4PenelopeCrossSectionHandler.hh" |
---|
59 | #include "G4AtomicTransitionManager.hh" |
---|
60 | #include "G4AtomicShell.hh" |
---|
61 | #include "G4eIonisationSpectrum.hh" |
---|
62 | #include "G4VDataSetAlgorithm.hh" |
---|
63 | #include "G4SemiLogInterpolation.hh" |
---|
64 | #include "G4LogLogInterpolation.hh" |
---|
65 | #include "G4EMDataSet.hh" |
---|
66 | #include "G4VEMDataSet.hh" |
---|
67 | #include "G4CompositeEMDataSet.hh" |
---|
68 | #include "G4EnergyLossTables.hh" |
---|
69 | #include "G4UnitsTable.hh" |
---|
70 | #include "G4Electron.hh" |
---|
71 | #include "G4Gamma.hh" |
---|
72 | #include "G4Positron.hh" |
---|
73 | #include "G4ProductionCutsTable.hh" |
---|
74 | #include "G4ProcessManager.hh" |
---|
75 | |
---|
76 | G4PenelopeIonisation::G4PenelopeIonisation(const G4String& nam) |
---|
77 | : G4eLowEnergyLoss(nam), |
---|
78 | crossSectionHandler(0), |
---|
79 | theMeanFreePath(0), |
---|
80 | kineticEnergy1(0.0), |
---|
81 | cosThetaPrimary(1.0), |
---|
82 | energySecondary(0.0), |
---|
83 | cosThetaSecondary(0.0), |
---|
84 | iOsc(-1) |
---|
85 | { |
---|
86 | cutForPhotons = 250.0*eV; |
---|
87 | cutForElectrons = 250.0*eV; |
---|
88 | verboseLevel = 0; |
---|
89 | ionizationEnergy = new std::map<G4int,G4DataVector*>; |
---|
90 | resonanceEnergy = new std::map<G4int,G4DataVector*>; |
---|
91 | occupationNumber = new std::map<G4int,G4DataVector*>; |
---|
92 | shellFlag = new std::map<G4int,G4DataVector*>; |
---|
93 | ReadData(); //Read data from file |
---|
94 | |
---|
95 | G4cout << G4endl; |
---|
96 | G4cout << "*******************************************************************************" << G4endl; |
---|
97 | G4cout << "*******************************************************************************" << G4endl; |
---|
98 | G4cout << " The class G4PenelopeIonisation is NOT SUPPORTED ANYMORE. " << G4endl; |
---|
99 | G4cout << " It will be REMOVED with the next major release of Geant4. " << G4endl; |
---|
100 | G4cout << " Please consult: https://twiki.cern.ch/twiki/bin/view/Geant4/LoweProcesses" << G4endl; |
---|
101 | G4cout << "*******************************************************************************" << G4endl; |
---|
102 | G4cout << "*******************************************************************************" << G4endl; |
---|
103 | G4cout << G4endl; |
---|
104 | |
---|
105 | } |
---|
106 | |
---|
107 | |
---|
108 | G4PenelopeIonisation::~G4PenelopeIonisation() |
---|
109 | { |
---|
110 | delete crossSectionHandler; |
---|
111 | delete theMeanFreePath; |
---|
112 | for (G4int Z=1;Z<100;Z++) |
---|
113 | { |
---|
114 | if (ionizationEnergy->count(Z)) delete (ionizationEnergy->find(Z)->second); |
---|
115 | if (resonanceEnergy->count(Z)) delete (resonanceEnergy->find(Z)->second); |
---|
116 | if (occupationNumber->count(Z)) delete (occupationNumber->find(Z)->second); |
---|
117 | if (shellFlag->count(Z)) delete (shellFlag->find(Z)->second); |
---|
118 | } |
---|
119 | delete ionizationEnergy; |
---|
120 | delete resonanceEnergy; |
---|
121 | delete occupationNumber; |
---|
122 | delete shellFlag; |
---|
123 | } |
---|
124 | |
---|
125 | |
---|
126 | void G4PenelopeIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
---|
127 | { |
---|
128 | if(verboseLevel > 0) { |
---|
129 | G4cout << "G4PenelopeIonisation::BuildPhysicsTable start" << G4endl; |
---|
130 | } |
---|
131 | |
---|
132 | cutForDelta.clear(); |
---|
133 | |
---|
134 | // Create and fill G4CrossSectionHandler once |
---|
135 | if ( crossSectionHandler != 0 ) delete crossSectionHandler; |
---|
136 | G4VDataSetAlgorithm* interpolation = new G4LogLogInterpolation(); |
---|
137 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
---|
138 | G4double highKineticEnergy = GetUpperBoundEloss(); |
---|
139 | G4int totBin = GetNbinEloss(); |
---|
140 | crossSectionHandler = new G4PenelopeCrossSectionHandler(this,aParticleType, |
---|
141 | interpolation, |
---|
142 | lowKineticEnergy, |
---|
143 | highKineticEnergy, |
---|
144 | totBin); |
---|
145 | |
---|
146 | if (&aParticleType == G4Electron::Electron()) |
---|
147 | { |
---|
148 | crossSectionHandler->LoadData("penelope/ion-cs-el-"); |
---|
149 | } |
---|
150 | else if (&aParticleType == G4Positron::Positron()) |
---|
151 | { |
---|
152 | crossSectionHandler->LoadData("penelope/ion-cs-po-"); |
---|
153 | } |
---|
154 | |
---|
155 | if (verboseLevel > 0) { |
---|
156 | G4cout << GetProcessName() << " is created." << G4endl; |
---|
157 | } |
---|
158 | |
---|
159 | // Build loss table for Ionisation |
---|
160 | |
---|
161 | BuildLossTable(aParticleType); |
---|
162 | |
---|
163 | if(verboseLevel > 0) { |
---|
164 | G4cout << "The loss table is built" |
---|
165 | << G4endl; |
---|
166 | } |
---|
167 | |
---|
168 | if (&aParticleType==G4Electron::Electron()) { |
---|
169 | |
---|
170 | RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; |
---|
171 | CounterOfElectronProcess++; |
---|
172 | PrintInfoDefinition(); |
---|
173 | |
---|
174 | } else { |
---|
175 | |
---|
176 | RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; |
---|
177 | CounterOfPositronProcess++; |
---|
178 | PrintInfoDefinition(); |
---|
179 | } |
---|
180 | |
---|
181 | // Build mean free path data using cut values |
---|
182 | |
---|
183 | if( theMeanFreePath ) delete theMeanFreePath; |
---|
184 | theMeanFreePath = crossSectionHandler-> |
---|
185 | BuildMeanFreePathForMaterials(&cutForDelta); |
---|
186 | |
---|
187 | if(verboseLevel > 0) { |
---|
188 | G4cout << "The MeanFreePath table is built" |
---|
189 | << G4endl; |
---|
190 | if(verboseLevel > 1) theMeanFreePath->PrintData(); |
---|
191 | } |
---|
192 | |
---|
193 | // Build common DEDX table for all ionisation processes |
---|
194 | |
---|
195 | BuildDEDXTable(aParticleType); |
---|
196 | |
---|
197 | if (verboseLevel > 0) { |
---|
198 | G4cout << "G4PenelopeIonisation::BuildPhysicsTable end" |
---|
199 | << G4endl; |
---|
200 | } |
---|
201 | } |
---|
202 | |
---|
203 | |
---|
204 | void G4PenelopeIonisation::BuildLossTable( |
---|
205 | const G4ParticleDefinition& aParticleType) |
---|
206 | { |
---|
207 | // Build table for energy loss due to soft brems |
---|
208 | // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss |
---|
209 | |
---|
210 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
---|
211 | G4double highKineticEnergy = GetUpperBoundEloss(); |
---|
212 | size_t totBin = GetNbinEloss(); |
---|
213 | |
---|
214 | // create table |
---|
215 | |
---|
216 | if (theLossTable) { |
---|
217 | theLossTable->clearAndDestroy(); |
---|
218 | delete theLossTable; |
---|
219 | } |
---|
220 | const G4ProductionCutsTable* theCoupleTable= |
---|
221 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
222 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
223 | theLossTable = new G4PhysicsTable(numOfCouples); |
---|
224 | |
---|
225 | // Clean up the vector of cuts |
---|
226 | |
---|
227 | cutForDelta.clear(); |
---|
228 | |
---|
229 | // Loop for materials |
---|
230 | |
---|
231 | for (size_t m=0; m<numOfCouples; m++) { |
---|
232 | |
---|
233 | // create physics vector and fill it |
---|
234 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, |
---|
235 | highKineticEnergy, |
---|
236 | totBin); |
---|
237 | |
---|
238 | // get material parameters needed for the energy loss calculation |
---|
239 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m); |
---|
240 | const G4Material* material= couple->GetMaterial(); |
---|
241 | |
---|
242 | // the cut cannot be below lowest limit |
---|
243 | G4double tCut = 0.0; |
---|
244 | tCut = (*(theCoupleTable->GetEnergyCutsVector(1)))[m]; |
---|
245 | tCut = std::min(tCut,highKineticEnergy); |
---|
246 | |
---|
247 | cutForDelta.push_back(tCut); |
---|
248 | |
---|
249 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
250 | size_t NumberOfElements = material->GetNumberOfElements() ; |
---|
251 | const G4double* theAtomicNumDensityVector = |
---|
252 | material->GetAtomicNumDensityVector(); |
---|
253 | const G4double electronVolumeDensity = |
---|
254 | material->GetTotNbOfElectPerVolume(); //electron density |
---|
255 | if(verboseLevel > 0) { |
---|
256 | G4cout << "Energy loss for material # " << m |
---|
257 | << " tCut(keV)= " << tCut/keV |
---|
258 | << G4endl; |
---|
259 | } |
---|
260 | |
---|
261 | // now comes the loop for the kinetic energy values |
---|
262 | for (size_t i = 0; i<totBin; i++) { |
---|
263 | |
---|
264 | G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(i); |
---|
265 | G4double ionloss = 0.; |
---|
266 | |
---|
267 | // loop for elements in the material |
---|
268 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
---|
269 | |
---|
270 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
---|
271 | ionloss += |
---|
272 | CalculateContinuous(lowEdgeEnergy,tCut,Z,electronVolumeDensity, |
---|
273 | aParticleType) * theAtomicNumDensityVector[iel]; |
---|
274 | |
---|
275 | if(verboseLevel > 1) { |
---|
276 | G4cout << "Z= " << Z |
---|
277 | << " E(keV)= " << lowEdgeEnergy/keV |
---|
278 | << " loss= " << ionloss |
---|
279 | << " rho= " << theAtomicNumDensityVector[iel] |
---|
280 | << G4endl; |
---|
281 | } |
---|
282 | } |
---|
283 | aVector->PutValue(i,ionloss); |
---|
284 | } |
---|
285 | theLossTable->insert(aVector); |
---|
286 | } |
---|
287 | } |
---|
288 | |
---|
289 | |
---|
290 | G4VParticleChange* G4PenelopeIonisation::PostStepDoIt(const G4Track& track, |
---|
291 | const G4Step& step) |
---|
292 | { |
---|
293 | aParticleChange.Initialize(track); |
---|
294 | |
---|
295 | const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); |
---|
296 | const G4DynamicParticle* incidentElectron = track.GetDynamicParticle(); |
---|
297 | const G4Material* material = couple->GetMaterial(); |
---|
298 | const G4double electronVolumeDensity = |
---|
299 | material->GetTotNbOfElectPerVolume(); //electron density |
---|
300 | const G4ParticleDefinition* aParticleType = track.GetDefinition(); |
---|
301 | G4double kineticEnergy0 = incidentElectron->GetKineticEnergy(); |
---|
302 | G4ParticleMomentum electronDirection0 = incidentElectron->GetMomentumDirection(); |
---|
303 | |
---|
304 | //Inizialisation of variables |
---|
305 | kineticEnergy1=kineticEnergy0; |
---|
306 | cosThetaPrimary=1.0; |
---|
307 | energySecondary=0.0; |
---|
308 | cosThetaSecondary=1.0; |
---|
309 | |
---|
310 | G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy0); |
---|
311 | G4int index = couple->GetIndex(); |
---|
312 | G4double tCut = cutForDelta[index]; |
---|
313 | |
---|
314 | if (aParticleType==G4Electron::Electron()){ |
---|
315 | CalculateDiscreteForElectrons(kineticEnergy0,tCut,Z,electronVolumeDensity); |
---|
316 | } |
---|
317 | else if (aParticleType==G4Positron::Positron()){ |
---|
318 | CalculateDiscreteForPositrons(kineticEnergy0,tCut,Z,electronVolumeDensity); |
---|
319 | } |
---|
320 | // the method CalculateDiscrete() sets the private variables: |
---|
321 | // kineticEnergy1 = energy of the primary electron after the interaction |
---|
322 | // cosThetaPrimary = std::cos(theta) of the primary after the interaction |
---|
323 | // energySecondary = energy of the secondary electron |
---|
324 | // cosThetaSecondary = std::cos(theta) of the secondary |
---|
325 | |
---|
326 | if(energySecondary == 0.0) |
---|
327 | { |
---|
328 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
329 | } |
---|
330 | |
---|
331 | //Update the primary particle |
---|
332 | G4double sint = std::sqrt(1. - cosThetaPrimary*cosThetaPrimary); |
---|
333 | G4double phi = twopi * G4UniformRand(); |
---|
334 | G4double dirx = sint * std::cos(phi); |
---|
335 | G4double diry = sint * std::sin(phi); |
---|
336 | G4double dirz = cosThetaPrimary; |
---|
337 | |
---|
338 | G4ThreeVector electronDirection1(dirx,diry,dirz); |
---|
339 | electronDirection1.rotateUz(electronDirection0); |
---|
340 | aParticleChange.ProposeMomentumDirection(electronDirection1) ; |
---|
341 | |
---|
342 | if (kineticEnergy1 > 0.) |
---|
343 | { |
---|
344 | aParticleChange.ProposeEnergy(kineticEnergy1) ; |
---|
345 | } |
---|
346 | else |
---|
347 | { |
---|
348 | aParticleChange.ProposeEnergy(0.) ; |
---|
349 | if (aParticleType->GetProcessManager()->GetAtRestProcessVector()->size()) |
---|
350 | //In this case there is at least one AtRest process |
---|
351 | { |
---|
352 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
---|
353 | } |
---|
354 | else |
---|
355 | { |
---|
356 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
357 | } |
---|
358 | } |
---|
359 | |
---|
360 | //Generate the delta day |
---|
361 | G4int iosc2 = 0; |
---|
362 | G4double ioniEnergy = 0.0; |
---|
363 | if (iOsc > 0) { |
---|
364 | ioniEnergy=(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
365 | iosc2 = (ionizationEnergy->find(Z)->second->size()) - iOsc; //they are in reversed order |
---|
366 | } |
---|
367 | |
---|
368 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
---|
369 | G4double bindingEnergy = 0.0; |
---|
370 | G4int shellId = 0; |
---|
371 | if (iOsc > 0){ |
---|
372 | const G4AtomicShell* shell = transitionManager->Shell(Z,iosc2-1); // Modified by Alf |
---|
373 | bindingEnergy = shell->BindingEnergy(); |
---|
374 | shellId = shell->ShellId(); |
---|
375 | } |
---|
376 | |
---|
377 | G4double ionEnergy = bindingEnergy; //energy spent to ionise the atom according to G4dabatase |
---|
378 | G4double eKineticEnergy = energySecondary; |
---|
379 | |
---|
380 | //This is an awful thing: Penelope generates the fluorescence only for L and K shells |
---|
381 | //(i.e. Osc = 1 --> 4). For high-Z, the other shells can be quite relevant. In this case |
---|
382 | //one MUST ensure ''by hand'' the energy conservation. Then there is the other problem that |
---|
383 | //the fluorescence database of Penelope doesn not match that of Geant4. |
---|
384 | |
---|
385 | G4double energyBalance = kineticEnergy0 - kineticEnergy1 - energySecondary; //Penelope Balance |
---|
386 | |
---|
387 | if (std::abs(energyBalance) < 1*eV) |
---|
388 | { |
---|
389 | //in this case Penelope didn't subtract the fluorescence energy: do here by hand |
---|
390 | eKineticEnergy = energySecondary - bindingEnergy; |
---|
391 | } |
---|
392 | else |
---|
393 | { |
---|
394 | //Penelope subtracted the fluorescence, but one has to match the databases |
---|
395 | eKineticEnergy = energySecondary+ioniEnergy-bindingEnergy; |
---|
396 | } |
---|
397 | |
---|
398 | //Now generates the various secondaries |
---|
399 | size_t nTotPhotons=0; |
---|
400 | G4int nPhotons=0; |
---|
401 | |
---|
402 | const G4ProductionCutsTable* theCoupleTable= |
---|
403 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
404 | size_t indx = couple->GetIndex(); |
---|
405 | G4double cutg = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx]; |
---|
406 | cutg = std::min(cutForPhotons,cutg); |
---|
407 | |
---|
408 | G4double cute = (*(theCoupleTable->GetEnergyCutsVector(1)))[indx]; |
---|
409 | cute = std::min(cutForPhotons,cute); |
---|
410 | |
---|
411 | std::vector<G4DynamicParticle*>* photonVector=0; |
---|
412 | G4DynamicParticle* aPhoton; |
---|
413 | if (Z>5 && (ionEnergy > cutg || ionEnergy > cute)) |
---|
414 | { |
---|
415 | photonVector = deexcitationManager.GenerateParticles(Z,shellId); |
---|
416 | nTotPhotons = photonVector->size(); |
---|
417 | for (size_t k=0;k<nTotPhotons;k++){ |
---|
418 | aPhoton = (*photonVector)[k]; |
---|
419 | if (aPhoton) |
---|
420 | { |
---|
421 | G4double itsCut = cutg; |
---|
422 | if (aPhoton->GetDefinition() == G4Electron::Electron()) itsCut = cute; |
---|
423 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
---|
424 | if (itsEnergy > itsCut && itsEnergy <= ionEnergy) |
---|
425 | { |
---|
426 | nPhotons++; |
---|
427 | ionEnergy -= itsEnergy; |
---|
428 | } |
---|
429 | else |
---|
430 | { |
---|
431 | delete aPhoton; |
---|
432 | (*photonVector)[k]=0; |
---|
433 | } |
---|
434 | } |
---|
435 | } |
---|
436 | } |
---|
437 | G4double energyDeposit=ionEnergy; //il deposito locale e' quello che rimane |
---|
438 | G4int nbOfSecondaries=nPhotons; |
---|
439 | |
---|
440 | |
---|
441 | // Generate the delta ray |
---|
442 | G4double sin2 = std::sqrt(1. - cosThetaSecondary*cosThetaSecondary); |
---|
443 | G4double phi2 = twopi * G4UniformRand(); |
---|
444 | G4DynamicParticle* electron = 0; |
---|
445 | |
---|
446 | G4double xEl = sin2 * std::cos(phi2); |
---|
447 | G4double yEl = sin2 * std::sin(phi2); |
---|
448 | G4double zEl = cosThetaSecondary; |
---|
449 | G4ThreeVector eDirection(xEl,yEl,zEl); //electron direction |
---|
450 | eDirection.rotateUz(electronDirection0); |
---|
451 | |
---|
452 | electron = new G4DynamicParticle (G4Electron::Electron(), |
---|
453 | eDirection,eKineticEnergy) ; |
---|
454 | nbOfSecondaries++; |
---|
455 | |
---|
456 | aParticleChange.SetNumberOfSecondaries(nbOfSecondaries); |
---|
457 | if (electron) aParticleChange.AddSecondary(electron); |
---|
458 | |
---|
459 | G4double energySumTest = kineticEnergy1 + eKineticEnergy; |
---|
460 | |
---|
461 | for (size_t ll=0;ll<nTotPhotons;ll++) |
---|
462 | { |
---|
463 | aPhoton = (*photonVector)[ll]; |
---|
464 | if (aPhoton) { |
---|
465 | aParticleChange.AddSecondary(aPhoton); |
---|
466 | energySumTest += aPhoton->GetKineticEnergy(); |
---|
467 | } |
---|
468 | } |
---|
469 | delete photonVector; |
---|
470 | if (energyDeposit < 0) |
---|
471 | { |
---|
472 | G4cout << "WARNING-" |
---|
473 | << "G4PenelopeIonisaition::PostStepDoIt - Negative energy deposit" |
---|
474 | << G4endl; |
---|
475 | energyDeposit=0; |
---|
476 | } |
---|
477 | energySumTest += energyDeposit; |
---|
478 | if (std::abs(energySumTest-kineticEnergy0)>1*eV) |
---|
479 | { |
---|
480 | G4cout << "WARNING-" |
---|
481 | << "G4PenelopeIonisaition::PostStepDoIt - Energy non conservation" |
---|
482 | << G4endl; |
---|
483 | G4cout << "Final energy - initial energy = " << |
---|
484 | (energySumTest-kineticEnergy0)/eV << " eV" << G4endl; |
---|
485 | } |
---|
486 | aParticleChange.ProposeLocalEnergyDeposit(energyDeposit); |
---|
487 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
488 | } |
---|
489 | |
---|
490 | |
---|
491 | void G4PenelopeIonisation::PrintInfoDefinition() |
---|
492 | { |
---|
493 | G4String comments = "Total cross sections from EEDL database."; |
---|
494 | comments += "\n Delta energy sampled from a parametrised formula."; |
---|
495 | comments += "\n Implementation of the continuous dE/dx part."; |
---|
496 | comments += "\n At present it can be used for electrons and positrons "; |
---|
497 | comments += "in the energy range [250eV,100GeV]."; |
---|
498 | comments += "\n The process must work with G4PenelopeBremsstrahlung."; |
---|
499 | |
---|
500 | G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; |
---|
501 | } |
---|
502 | |
---|
503 | G4bool G4PenelopeIonisation::IsApplicable(const G4ParticleDefinition& particle) |
---|
504 | { |
---|
505 | return ( (&particle == G4Electron::Electron()) || ( |
---|
506 | &particle == G4Positron::Positron()) ); |
---|
507 | } |
---|
508 | |
---|
509 | G4double G4PenelopeIonisation::GetMeanFreePath(const G4Track& track, |
---|
510 | G4double, // previousStepSize |
---|
511 | G4ForceCondition* cond) |
---|
512 | { |
---|
513 | *cond = NotForced; |
---|
514 | G4int index = (track.GetMaterialCutsCouple())->GetIndex(); |
---|
515 | const G4VEMDataSet* data = theMeanFreePath->GetComponent(index); |
---|
516 | G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); |
---|
517 | return meanFreePath; |
---|
518 | } |
---|
519 | |
---|
520 | void G4PenelopeIonisation::SetCutForLowEnSecPhotons(G4double cut) |
---|
521 | { |
---|
522 | cutForPhotons = cut; |
---|
523 | deexcitationManager.SetCutForSecondaryPhotons(cut); |
---|
524 | } |
---|
525 | |
---|
526 | void G4PenelopeIonisation::SetCutForLowEnSecElectrons(G4double cut) |
---|
527 | { |
---|
528 | cutForElectrons = cut; |
---|
529 | deexcitationManager.SetCutForAugerElectrons(cut); |
---|
530 | } |
---|
531 | |
---|
532 | void G4PenelopeIonisation::ActivateAuger(G4bool val) |
---|
533 | { |
---|
534 | deexcitationManager.ActivateAugerElectronProduction(val); |
---|
535 | } |
---|
536 | |
---|
537 | |
---|
538 | void G4PenelopeIonisation::CalculateDiscreteForElectrons(G4double ene,G4double cutoff, |
---|
539 | G4int Z,G4double electronVolumeDensity) |
---|
540 | { |
---|
541 | kineticEnergy1=ene; |
---|
542 | cosThetaPrimary=1.0; |
---|
543 | energySecondary=0.0; |
---|
544 | cosThetaSecondary=1.0; |
---|
545 | iOsc=-1; |
---|
546 | //constants |
---|
547 | G4double rb=ene+2.0*electron_mass_c2; |
---|
548 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
549 | G4double gamma2 = gamma*gamma; |
---|
550 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
551 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
552 | G4double cps = ene*rb; |
---|
553 | G4double cp = std::sqrt(cps); |
---|
554 | |
---|
555 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
556 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
557 | |
---|
558 | G4double rl,rl1; |
---|
559 | |
---|
560 | if (cutoff > ene) return; //delta rays are not generated |
---|
561 | |
---|
562 | G4DataVector* qm = new G4DataVector(); |
---|
563 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
564 | G4DataVector* typeOfInteraction = new G4DataVector(); |
---|
565 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
566 | |
---|
567 | //Hard close collisions with outer shells |
---|
568 | G4double wmaxc = 0.5*ene; |
---|
569 | G4double closeCS0 = 0.0; |
---|
570 | G4double closeCS = 0.0; |
---|
571 | if (cutoff>0.1*eV) |
---|
572 | { |
---|
573 | rl=cutoff/ene; |
---|
574 | rl1=1.0-rl; |
---|
575 | if (rl < 0.5) |
---|
576 | closeCS0 = (amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/ene; |
---|
577 | } |
---|
578 | |
---|
579 | // Cross sections for the different oscillators |
---|
580 | |
---|
581 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
582 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
583 | // i.e. |
---|
584 | // cumulHardCS[0] = 0.0 |
---|
585 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
586 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
587 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
588 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
589 | // etc. |
---|
590 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
591 | // interaction. |
---|
592 | // |
---|
593 | // For each index iFill of the cumulHardCS vector, |
---|
594 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
595 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
596 | // 1 = distant longitudinal interaction |
---|
597 | // 2 = distant transverse interaction |
---|
598 | // 3 = close collision |
---|
599 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
600 | |
---|
601 | |
---|
602 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
603 | G4double totalHardCS = 0.0; |
---|
604 | G4double involvedElectrons = 0.0; |
---|
605 | for (G4int i=0;i<nOscil;i++){ |
---|
606 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
607 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
608 | //Distant excitations |
---|
609 | if (wi>cutoff && wi<ene) |
---|
610 | { |
---|
611 | if (wi>(1e-6*ene)){ |
---|
612 | G4double cpp=std::sqrt((ene-wi)*(ene-wi+2.0*electron_mass_c2)); |
---|
613 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+electron_mass_c2*electron_mass_c2)-electron_mass_c2); |
---|
614 | } |
---|
615 | else |
---|
616 | { |
---|
617 | qm->push_back((wi*wi)/(beta2*2.0*electron_mass_c2)); |
---|
618 | } |
---|
619 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento |
---|
620 | if ((*qm)[i] < wi) |
---|
621 | { |
---|
622 | |
---|
623 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
624 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
625 | cumulHardCS->push_back(totalHardCS); |
---|
626 | typeOfInteraction->push_back(1.0); //distant longitudinal |
---|
627 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
628 | totalHardCS += distantLongitCS; |
---|
629 | |
---|
630 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
631 | |
---|
632 | cumulHardCS->push_back(totalHardCS); |
---|
633 | typeOfInteraction->push_back(2.0); //distant tranverse |
---|
634 | nbOfLevel->push_back((G4double) i); |
---|
635 | totalHardCS += distantTransvCS; |
---|
636 | } |
---|
637 | } |
---|
638 | else |
---|
639 | { |
---|
640 | qm->push_back(wi); |
---|
641 | } |
---|
642 | //close collisions |
---|
643 | if(wi < wmaxc){ |
---|
644 | if (wi < cutoff) { |
---|
645 | involvedElectrons += occupNb; |
---|
646 | } |
---|
647 | else |
---|
648 | { |
---|
649 | rl=wi/ene; |
---|
650 | rl1=1.0-rl; |
---|
651 | closeCS = occupNb*(amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/ene; |
---|
652 | cumulHardCS->push_back(totalHardCS); |
---|
653 | typeOfInteraction->push_back(3.0); //close |
---|
654 | nbOfLevel->push_back((G4double) i); |
---|
655 | totalHardCS += closeCS; |
---|
656 | } |
---|
657 | } |
---|
658 | } // loop on the levels |
---|
659 | |
---|
660 | cumulHardCS->push_back(totalHardCS); |
---|
661 | typeOfInteraction->push_back(4.0); //close interaction with outer shells |
---|
662 | nbOfLevel->push_back(-1.0); |
---|
663 | totalHardCS += involvedElectrons*closeCS0; |
---|
664 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
665 | |
---|
666 | if (totalHardCS < 1e-30) { |
---|
667 | kineticEnergy1=ene; |
---|
668 | cosThetaPrimary=1.0; |
---|
669 | energySecondary=0.0; |
---|
670 | cosThetaSecondary=0.0; |
---|
671 | iOsc=-1; |
---|
672 | delete qm; |
---|
673 | delete cumulHardCS; |
---|
674 | delete typeOfInteraction; |
---|
675 | delete nbOfLevel; |
---|
676 | return; |
---|
677 | } |
---|
678 | |
---|
679 | |
---|
680 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
681 | G4double TST = totalHardCS*G4UniformRand(); |
---|
682 | G4int is=0; |
---|
683 | G4int js= nbOfLevel->size(); |
---|
684 | do{ |
---|
685 | G4int it=(is+js)/2; |
---|
686 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
687 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
688 | }while((js-is) > 1); |
---|
689 | |
---|
690 | G4double UII=0.0; |
---|
691 | G4double rkc=cutoff/ene; |
---|
692 | G4double dde; |
---|
693 | G4int kks; |
---|
694 | |
---|
695 | G4double sampledInteraction = (*typeOfInteraction)[is]; |
---|
696 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
697 | |
---|
698 | //Generates the final state according to the sampled level and |
---|
699 | //interaction channel |
---|
700 | |
---|
701 | if (sampledInteraction == 1.0) //Hard distant longitudinal collisions |
---|
702 | { |
---|
703 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
704 | kineticEnergy1=ene-dde; |
---|
705 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
706 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
707 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
708 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
709 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
710 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
711 | //Energy and emission angle of the delta ray |
---|
712 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
713 | if (kks>4) |
---|
714 | { |
---|
715 | energySecondary=dde; |
---|
716 | } |
---|
717 | else |
---|
718 | { |
---|
719 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
720 | } |
---|
721 | cosThetaSecondary = 0.5*(dde*(ene+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
722 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
723 | } |
---|
724 | |
---|
725 | else if (sampledInteraction == 2.0) //Hard distant transverse collisions |
---|
726 | { |
---|
727 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
728 | kineticEnergy1=ene-dde; |
---|
729 | cosThetaPrimary=1.0; |
---|
730 | //Energy and emission angle of the delta ray |
---|
731 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
732 | if (kks>4) |
---|
733 | { |
---|
734 | energySecondary=dde; |
---|
735 | } |
---|
736 | else |
---|
737 | { |
---|
738 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
739 | } |
---|
740 | cosThetaSecondary = 1.0; |
---|
741 | } |
---|
742 | |
---|
743 | else if (sampledInteraction == 3.0 || sampledInteraction == 4.0) //Close interaction |
---|
744 | { |
---|
745 | if (sampledInteraction == 4.0) //interaction with inner shells |
---|
746 | { |
---|
747 | UII=0.0; |
---|
748 | rkc = cutoff/ene; |
---|
749 | iOsc = -1; |
---|
750 | } |
---|
751 | else |
---|
752 | { |
---|
753 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
754 | if (kks > 4) { |
---|
755 | UII=0.0; |
---|
756 | } |
---|
757 | else |
---|
758 | { |
---|
759 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
760 | } |
---|
761 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/ene; |
---|
762 | } |
---|
763 | G4double A = 0.5*amol; |
---|
764 | G4double arkc = A*0.5*rkc; |
---|
765 | G4double phi,rk2,rk,rkf; |
---|
766 | do{ |
---|
767 | G4double fb = (1.0+arkc)*G4UniformRand(); |
---|
768 | if (fb<1.0) |
---|
769 | { |
---|
770 | rk=rkc/(1.0-fb*(1.0-(rkc*2.0))); |
---|
771 | } |
---|
772 | else{ |
---|
773 | rk = rkc+(fb-1.0)*(0.5-rkc)/arkc; |
---|
774 | } |
---|
775 | rk2 = rk*rk; |
---|
776 | rkf = rk/(1.0-rk); |
---|
777 | phi = 1.0+(rkf*rkf)-rkf+amol*(rk2+rkf); |
---|
778 | }while ((G4UniformRand()*(1.0+A*rk2)) > phi); |
---|
779 | //Energy and scattering angle (primary electron); |
---|
780 | kineticEnergy1 = ene*(1.0-rk); |
---|
781 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(ene*(rb-(rk*ene)))); |
---|
782 | //Energy and scattering angle of the delta ray |
---|
783 | energySecondary = ene-kineticEnergy1-UII; |
---|
784 | cosThetaSecondary = std::sqrt(rk*ene*rb/(ene*(rk*ene+2.0*electron_mass_c2))); |
---|
785 | } |
---|
786 | |
---|
787 | else |
---|
788 | |
---|
789 | { |
---|
790 | G4String excep = "G4PenelopeIonisation - Error in the calculation of the final state"; |
---|
791 | G4Exception(excep); |
---|
792 | } |
---|
793 | |
---|
794 | delete qm; |
---|
795 | delete cumulHardCS; |
---|
796 | delete typeOfInteraction; |
---|
797 | delete nbOfLevel; |
---|
798 | |
---|
799 | return; |
---|
800 | } |
---|
801 | |
---|
802 | void G4PenelopeIonisation::ReadData() |
---|
803 | { |
---|
804 | char* path = getenv("G4LEDATA"); |
---|
805 | if (!path) |
---|
806 | { |
---|
807 | G4String excep = "G4PenelopeIonisation - G4LEDATA environment variable not set!"; |
---|
808 | G4Exception(excep); |
---|
809 | } |
---|
810 | G4String pathString(path); |
---|
811 | G4String pathFile = pathString + "/penelope/ion-pen.dat"; |
---|
812 | std::ifstream file(pathFile); |
---|
813 | std::filebuf* lsdp = file.rdbuf(); |
---|
814 | |
---|
815 | if (!(lsdp->is_open())) |
---|
816 | { |
---|
817 | G4String excep = "G4PenelopeIonisation - data file " + pathFile + " not found!"; |
---|
818 | G4Exception(excep); |
---|
819 | } |
---|
820 | |
---|
821 | G4int k1,test,test1,k2,k3; |
---|
822 | G4double a1,a2,a3,a4; |
---|
823 | G4int Z=1,nLevels=0; |
---|
824 | G4DataVector* x1; |
---|
825 | G4DataVector* x2; |
---|
826 | G4DataVector* x3; |
---|
827 | G4DataVector* x4; |
---|
828 | |
---|
829 | do{ |
---|
830 | x1 = new G4DataVector; |
---|
831 | x2 = new G4DataVector; |
---|
832 | x3 = new G4DataVector; |
---|
833 | x4 = new G4DataVector; |
---|
834 | file >> Z >> nLevels; |
---|
835 | for (G4int h=0;h<nLevels;h++){ |
---|
836 | //index,occup number,ion energy,res energy,fj0,kz,shell flag |
---|
837 | file >> k1 >> a1 >> a2 >> a3 >> a4 >> k2 >> k3; |
---|
838 | x1->push_back(a1); |
---|
839 | x2->push_back(a2); |
---|
840 | x3->push_back(a3); |
---|
841 | x4->push_back((G4double) k3); |
---|
842 | } |
---|
843 | occupationNumber->insert(std::make_pair(Z,x1)); |
---|
844 | ionizationEnergy->insert(std::make_pair(Z,x2)); |
---|
845 | resonanceEnergy->insert(std::make_pair(Z,x3)); |
---|
846 | shellFlag->insert(std::make_pair(Z,x4)); |
---|
847 | file >> test >> test1; //-1 -1 close the data for each Z |
---|
848 | if (test > 0) { |
---|
849 | G4String excep = "G4PenelopeIonisation - data file corrupted!"; |
---|
850 | G4Exception(excep); |
---|
851 | } |
---|
852 | }while (test != -2); //the very last Z is closed with -2 instead of -1 |
---|
853 | } |
---|
854 | |
---|
855 | |
---|
856 | G4double G4PenelopeIonisation::CalculateDeltaFermi(G4double ene,G4int Z, |
---|
857 | G4double electronVolumeDensity) |
---|
858 | { |
---|
859 | G4double plasmaEnergyCoefficient = 1.377e-39; //(e*hbar)^2/(epsilon0*electron_mass) |
---|
860 | G4double plasmaEnergySquared = plasmaEnergyCoefficient*(electronVolumeDensity*m3); |
---|
861 | // std::sqrt(plasmaEnergySquared) is the plasma energy of the solid (MeV) |
---|
862 | G4double gam = 1.0+ene/electron_mass_c2; |
---|
863 | G4double gam2=gam*gam; |
---|
864 | G4double delta = 0.0; |
---|
865 | |
---|
866 | //Density effect |
---|
867 | G4double TST = ((G4double) Z)/(gam2*plasmaEnergySquared); |
---|
868 | |
---|
869 | G4double wl2 = 0.0; |
---|
870 | G4double fdel=0.0; |
---|
871 | G4double wr=0; |
---|
872 | G4double help1=0.0; |
---|
873 | size_t nbOsc = resonanceEnergy->find(Z)->second->size(); |
---|
874 | for(size_t i=0;i<nbOsc;i++) |
---|
875 | { |
---|
876 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
877 | wr = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
878 | fdel += occupNb/(wr*wr+wl2); |
---|
879 | } |
---|
880 | if (fdel < TST) return delta; |
---|
881 | help1 = (*(resonanceEnergy->find(Z)->second))[nbOsc-1]; |
---|
882 | wl2 = help1*help1; |
---|
883 | do{ |
---|
884 | wl2=wl2*2.0; |
---|
885 | fdel = 0.0; |
---|
886 | for (size_t ii=0;ii<nbOsc;ii++){ |
---|
887 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[ii]; |
---|
888 | wr = (*(resonanceEnergy->find(Z)->second))[ii]; |
---|
889 | fdel += occupNb/(wr*wr+wl2); |
---|
890 | } |
---|
891 | }while (fdel > TST); |
---|
892 | G4double wl2l=0.0; |
---|
893 | G4double wl2u = wl2; |
---|
894 | G4double control = 0.0; |
---|
895 | do{ |
---|
896 | wl2=0.5*(wl2l+wl2u); |
---|
897 | fdel = 0.0; |
---|
898 | for (size_t jj=0;jj<nbOsc;jj++){ |
---|
899 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[jj]; |
---|
900 | wr = (*(resonanceEnergy->find(Z)->second))[jj]; |
---|
901 | fdel += occupNb/(wr*wr+wl2); |
---|
902 | } |
---|
903 | if (fdel > TST) |
---|
904 | { |
---|
905 | wl2l = wl2; |
---|
906 | } |
---|
907 | else |
---|
908 | { |
---|
909 | wl2u = wl2; |
---|
910 | } |
---|
911 | control = wl2u-wl2l-wl2*1e-12; |
---|
912 | }while(control>0); |
---|
913 | |
---|
914 | //Density correction effect |
---|
915 | for (size_t kk=0;kk<nbOsc;kk++){ |
---|
916 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[kk]; |
---|
917 | wr = (*(resonanceEnergy->find(Z)->second))[kk]; |
---|
918 | delta += occupNb*std::log(1.0+wl2/(wr*wr)); |
---|
919 | } |
---|
920 | delta = (delta/((G4double) Z))-wl2/(gam2*plasmaEnergySquared); |
---|
921 | return delta; |
---|
922 | } |
---|
923 | |
---|
924 | G4double G4PenelopeIonisation::CalculateContinuous(G4double ene,G4double cutoff, |
---|
925 | G4int Z,G4double electronVolumeDensity, |
---|
926 | const G4ParticleDefinition& particle) |
---|
927 | { |
---|
928 | //Constants |
---|
929 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
930 | G4double gamma2 = gamma*gamma; |
---|
931 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
932 | G4double constant = pi*classic_electr_radius*classic_electr_radius |
---|
933 | *2.0*electron_mass_c2/beta2; |
---|
934 | |
---|
935 | |
---|
936 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
937 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size(); |
---|
938 | G4double S1 = 0.0; |
---|
939 | G4double stoppingPower = 0.0; |
---|
940 | for (G4int i=0;i<nbOsc;i++){ |
---|
941 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
942 | if (&particle == G4Electron::Electron()) |
---|
943 | { |
---|
944 | S1 = CalculateStoppingPowerForElectrons(ene,resEnergy,delta,cutoff); |
---|
945 | } |
---|
946 | else if (&particle == G4Positron::Positron()) |
---|
947 | { |
---|
948 | S1 = CalculateStoppingPowerForPositrons(ene,resEnergy,delta,cutoff); |
---|
949 | } |
---|
950 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i]; |
---|
951 | stoppingPower += occupNb*constant*S1; |
---|
952 | } |
---|
953 | |
---|
954 | return stoppingPower; |
---|
955 | } |
---|
956 | |
---|
957 | G4double G4PenelopeIonisation::CalculateStoppingPowerForElectrons(G4double ene,G4double resEne, |
---|
958 | G4double delta,G4double cutoff) |
---|
959 | { |
---|
960 | //Calculate constants |
---|
961 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
962 | G4double gamma2 = gamma*gamma; |
---|
963 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
964 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
965 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
966 | G4double sPower = 0.0; |
---|
967 | if (ene < resEne) return sPower; |
---|
968 | |
---|
969 | //Distant interactions |
---|
970 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
971 | G4double cp1 = std::sqrt(cp1s); |
---|
972 | G4double cp = std::sqrt(cps); |
---|
973 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
974 | |
---|
975 | //Distant longitudinal interactions |
---|
976 | G4double qm = 0.0; |
---|
977 | |
---|
978 | if (resEne > ene*(1e-6)) |
---|
979 | { |
---|
980 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
981 | } |
---|
982 | else |
---|
983 | { |
---|
984 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
985 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
986 | } |
---|
987 | |
---|
988 | if (qm < resEne) |
---|
989 | { |
---|
990 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
991 | } |
---|
992 | else |
---|
993 | { |
---|
994 | sdLong = 0.0; |
---|
995 | } |
---|
996 | |
---|
997 | if (sdLong > 0) { |
---|
998 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
999 | sdDist = sdTrans + sdLong; |
---|
1000 | if (cutoff > resEne) sPower = sdDist; |
---|
1001 | } |
---|
1002 | |
---|
1003 | |
---|
1004 | // Close collisions (Moeller's cross section) |
---|
1005 | G4double wl = std::max(cutoff,resEne); |
---|
1006 | G4double wu = 0.5*ene; |
---|
1007 | |
---|
1008 | if (wl < (wu-1*eV)) wu=wl; |
---|
1009 | wl = resEne; |
---|
1010 | if (wl > (wu-1*eV)) return sPower; |
---|
1011 | sPower += std::log(wu/wl)+(ene/(ene-wu))-(ene/(ene-wl)) |
---|
1012 | + (2.0 - amol)*std::log((ene-wu)/(ene-wl)) |
---|
1013 | + amol*((wu*wu)-(wl*wl))/(2.0*ene*ene); |
---|
1014 | |
---|
1015 | return sPower; |
---|
1016 | } |
---|
1017 | |
---|
1018 | G4double G4PenelopeIonisation::CalculateStoppingPowerForPositrons(G4double ene,G4double resEne, |
---|
1019 | G4double delta,G4double cutoff) |
---|
1020 | { |
---|
1021 | //Calculate constants |
---|
1022 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
1023 | G4double gamma2 = gamma*gamma; |
---|
1024 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
1025 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
1026 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)); |
---|
1027 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
1028 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
1029 | G4double bha2 = amol*(3.0+1.0/help); |
---|
1030 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
1031 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
1032 | |
---|
1033 | G4double sPower = 0.0; |
---|
1034 | if (ene < resEne) return sPower; |
---|
1035 | |
---|
1036 | //Distant interactions |
---|
1037 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
1038 | G4double cp1 = std::sqrt(cp1s); |
---|
1039 | G4double cp = std::sqrt(cps); |
---|
1040 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
1041 | |
---|
1042 | //Distant longitudinal interactions |
---|
1043 | G4double qm = 0.0; |
---|
1044 | |
---|
1045 | if (resEne > ene*(1e-6)) |
---|
1046 | { |
---|
1047 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
1048 | } |
---|
1049 | else |
---|
1050 | { |
---|
1051 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
1052 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
1053 | } |
---|
1054 | |
---|
1055 | if (qm < resEne) |
---|
1056 | { |
---|
1057 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
1058 | } |
---|
1059 | else |
---|
1060 | { |
---|
1061 | sdLong = 0.0; |
---|
1062 | } |
---|
1063 | |
---|
1064 | if (sdLong > 0) { |
---|
1065 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
1066 | sdDist = sdTrans + sdLong; |
---|
1067 | if (cutoff > resEne) sPower = sdDist; |
---|
1068 | } |
---|
1069 | |
---|
1070 | |
---|
1071 | // Close collisions (Bhabha's cross section) |
---|
1072 | G4double wl = std::max(cutoff,resEne); |
---|
1073 | G4double wu = ene; |
---|
1074 | |
---|
1075 | if (wl < (wu-1*eV)) wu=wl; |
---|
1076 | wl = resEne; |
---|
1077 | if (wl > (wu-1*eV)) return sPower; |
---|
1078 | sPower += std::log(wu/wl)-bha1*(wu-wl)/ene |
---|
1079 | + bha2*((wu*wu)-(wl*wl))/(2.0*ene*ene) |
---|
1080 | - bha3*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene) |
---|
1081 | + bha4*((wu*wu*wu*wu)-(wl*wl*wl*wl))/(4.0*ene*ene*ene*ene); |
---|
1082 | |
---|
1083 | return sPower; |
---|
1084 | } |
---|
1085 | |
---|
1086 | void G4PenelopeIonisation::CalculateDiscreteForPositrons(G4double ene,G4double cutoff, |
---|
1087 | G4int Z,G4double electronVolumeDensity) |
---|
1088 | |
---|
1089 | { |
---|
1090 | kineticEnergy1=ene; |
---|
1091 | cosThetaPrimary=1.0; |
---|
1092 | energySecondary=0.0; |
---|
1093 | cosThetaSecondary=1.0; |
---|
1094 | iOsc=-1; |
---|
1095 | //constants |
---|
1096 | G4double rb=ene+2.0*electron_mass_c2; |
---|
1097 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
1098 | G4double gamma2 = gamma*gamma; |
---|
1099 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
1100 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
1101 | G4double cps = ene*rb; |
---|
1102 | G4double cp = std::sqrt(cps); |
---|
1103 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
1104 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
1105 | G4double bha2 = amol*(3.0+1.0/help); |
---|
1106 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
1107 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
1108 | |
---|
1109 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
1110 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
1111 | |
---|
1112 | G4double rl,rl1; |
---|
1113 | |
---|
1114 | if (cutoff > ene) return; //delta rays are not generated |
---|
1115 | |
---|
1116 | G4DataVector* qm = new G4DataVector(); |
---|
1117 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
1118 | G4DataVector* typeOfInteraction = new G4DataVector(); |
---|
1119 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
1120 | |
---|
1121 | |
---|
1122 | //Hard close collisions with outer shells |
---|
1123 | G4double wmaxc = ene; |
---|
1124 | G4double closeCS0 = 0.0; |
---|
1125 | G4double closeCS = 0.0; |
---|
1126 | if (cutoff>0.1*eV) |
---|
1127 | { |
---|
1128 | rl=cutoff/ene; |
---|
1129 | rl1=1.0-rl; |
---|
1130 | if (rl < 1.0) |
---|
1131 | closeCS0 = (((1.0/rl)-1.0) + bha1*std::log(rl) + bha2*rl1 |
---|
1132 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
1133 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/ene; |
---|
1134 | } |
---|
1135 | |
---|
1136 | // Cross sections for the different oscillators |
---|
1137 | |
---|
1138 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
1139 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
1140 | // i.e. |
---|
1141 | // cumulHardCS[0] = 0.0 |
---|
1142 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
1143 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
1144 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
1145 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
1146 | // etc. |
---|
1147 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
1148 | // interaction. |
---|
1149 | // |
---|
1150 | // For each index iFill of the cumulHardCS vector, |
---|
1151 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
1152 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
1153 | // 1 = distant longitudinal interaction |
---|
1154 | // 2 = distant transverse interaction |
---|
1155 | // 3 = close collision |
---|
1156 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
1157 | |
---|
1158 | |
---|
1159 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
1160 | G4double totalHardCS = 0.0; |
---|
1161 | G4double involvedElectrons = 0.0; |
---|
1162 | for (G4int i=0;i<nOscil;i++){ |
---|
1163 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
1164 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
1165 | //Distant excitations |
---|
1166 | if (wi>cutoff && wi<ene) |
---|
1167 | { |
---|
1168 | if (wi>(1e-6*ene)){ |
---|
1169 | G4double cpp=std::sqrt((ene-wi)*(ene-wi+2.0*electron_mass_c2)); |
---|
1170 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+ electron_mass_c2 * electron_mass_c2)-electron_mass_c2); |
---|
1171 | } |
---|
1172 | else |
---|
1173 | { |
---|
1174 | qm->push_back(wi*wi/(beta2+2.0*electron_mass_c2)); |
---|
1175 | } |
---|
1176 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento |
---|
1177 | if ((*qm)[i] < wi) |
---|
1178 | { |
---|
1179 | |
---|
1180 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
1181 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
1182 | cumulHardCS->push_back(totalHardCS); |
---|
1183 | typeOfInteraction->push_back(1.0); //distant longitudinal |
---|
1184 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
1185 | totalHardCS += distantLongitCS; |
---|
1186 | |
---|
1187 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
1188 | |
---|
1189 | cumulHardCS->push_back(totalHardCS); |
---|
1190 | typeOfInteraction->push_back(2.0); //distant tranverse |
---|
1191 | nbOfLevel->push_back((G4double) i); |
---|
1192 | totalHardCS += distantTransvCS; |
---|
1193 | } |
---|
1194 | } |
---|
1195 | else |
---|
1196 | { |
---|
1197 | qm->push_back(wi); |
---|
1198 | } |
---|
1199 | //close collisions |
---|
1200 | if(wi < wmaxc){ |
---|
1201 | if (wi < cutoff) { |
---|
1202 | involvedElectrons += occupNb; |
---|
1203 | } |
---|
1204 | else |
---|
1205 | { |
---|
1206 | rl=wi/ene; |
---|
1207 | rl1=1.0-rl; |
---|
1208 | closeCS = occupNb*(((1.0/rl)-1.0)+bha1*std::log(rl)+bha2*rl1 |
---|
1209 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
1210 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/ene; |
---|
1211 | cumulHardCS->push_back(totalHardCS); |
---|
1212 | typeOfInteraction->push_back(3.0); //close |
---|
1213 | nbOfLevel->push_back((G4double) i); |
---|
1214 | totalHardCS += closeCS; |
---|
1215 | } |
---|
1216 | } |
---|
1217 | } // loop on the levels |
---|
1218 | |
---|
1219 | cumulHardCS->push_back(totalHardCS); |
---|
1220 | typeOfInteraction->push_back(4.0); //close interaction with outer shells |
---|
1221 | nbOfLevel->push_back(-1.0); |
---|
1222 | totalHardCS += involvedElectrons*closeCS0; |
---|
1223 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
1224 | |
---|
1225 | if (totalHardCS < 1e-30) { |
---|
1226 | kineticEnergy1=ene; |
---|
1227 | cosThetaPrimary=1.0; |
---|
1228 | energySecondary=0.0; |
---|
1229 | cosThetaSecondary=0.0; |
---|
1230 | iOsc=-1; |
---|
1231 | delete qm; |
---|
1232 | delete cumulHardCS; |
---|
1233 | delete typeOfInteraction; |
---|
1234 | delete nbOfLevel; |
---|
1235 | return; |
---|
1236 | } |
---|
1237 | |
---|
1238 | |
---|
1239 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
1240 | G4double TST = totalHardCS*G4UniformRand(); |
---|
1241 | G4int is=0; |
---|
1242 | G4int js= nbOfLevel->size(); |
---|
1243 | do{ |
---|
1244 | G4int it=(is+js)/2; |
---|
1245 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
1246 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
1247 | }while((js-is) > 1); |
---|
1248 | |
---|
1249 | G4double UII=0.0; |
---|
1250 | G4double rkc=cutoff/ene; |
---|
1251 | G4double dde; |
---|
1252 | G4int kks; |
---|
1253 | |
---|
1254 | G4double sampledInteraction = (*typeOfInteraction)[is]; |
---|
1255 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
1256 | |
---|
1257 | //Generates the final state according to the sampled level and |
---|
1258 | //interaction channel |
---|
1259 | |
---|
1260 | if (sampledInteraction == 1.0) //Hard distant longitudinal collisions |
---|
1261 | { |
---|
1262 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
1263 | kineticEnergy1=ene-dde; |
---|
1264 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
1265 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
1266 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
1267 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
1268 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
1269 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
1270 | //Energy and emission angle of the delta ray |
---|
1271 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
1272 | if (kks>4) |
---|
1273 | { |
---|
1274 | energySecondary=dde; |
---|
1275 | } |
---|
1276 | else |
---|
1277 | { |
---|
1278 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
1279 | } |
---|
1280 | cosThetaSecondary = 0.5*(dde*(ene+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
1281 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
1282 | } |
---|
1283 | |
---|
1284 | else if (sampledInteraction == 2.0) //Hard distant transverse collisions |
---|
1285 | { |
---|
1286 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
1287 | kineticEnergy1=ene-dde; |
---|
1288 | cosThetaPrimary=1.0; |
---|
1289 | //Energy and emission angle of the delta ray |
---|
1290 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
1291 | if (kks>4) |
---|
1292 | { |
---|
1293 | energySecondary=dde; |
---|
1294 | } |
---|
1295 | else |
---|
1296 | { |
---|
1297 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
1298 | } |
---|
1299 | cosThetaSecondary = 1.0; |
---|
1300 | } |
---|
1301 | |
---|
1302 | else if (sampledInteraction == 3.0 || sampledInteraction == 4.0) //Close interaction |
---|
1303 | { |
---|
1304 | if (sampledInteraction == 4.0) //interaction with inner shells |
---|
1305 | { |
---|
1306 | UII=0.0; |
---|
1307 | rkc = cutoff/ene; |
---|
1308 | iOsc = -1; |
---|
1309 | } |
---|
1310 | else |
---|
1311 | { |
---|
1312 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
1313 | if (kks > 4) { |
---|
1314 | UII=0.0; |
---|
1315 | } |
---|
1316 | else |
---|
1317 | { |
---|
1318 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
1319 | } |
---|
1320 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/ene; |
---|
1321 | } |
---|
1322 | G4double phi,rk; |
---|
1323 | do{ |
---|
1324 | rk=rkc/(1.0-G4UniformRand()*(1.0-rkc)); |
---|
1325 | phi = 1.0-rk*(bha1-rk*(bha2-rk*(bha3-bha4*rk))); |
---|
1326 | }while ( G4UniformRand() > phi); |
---|
1327 | //Energy and scattering angle (primary electron); |
---|
1328 | kineticEnergy1 = ene*(1.0-rk); |
---|
1329 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(ene*(rb-(rk*ene)))); |
---|
1330 | //Energy and scattering angle of the delta ray |
---|
1331 | energySecondary = ene-kineticEnergy1-UII; |
---|
1332 | cosThetaSecondary = std::sqrt(rk*ene*rb/(ene*(rk*ene+2.0*electron_mass_c2))); |
---|
1333 | } |
---|
1334 | else |
---|
1335 | { |
---|
1336 | G4String excep = "G4PenelopeIonisation - Error in the calculation of the final state"; |
---|
1337 | G4Exception(excep); |
---|
1338 | } |
---|
1339 | |
---|
1340 | delete qm; |
---|
1341 | delete cumulHardCS; |
---|
1342 | delete typeOfInteraction; |
---|
1343 | delete nbOfLevel; |
---|
1344 | |
---|
1345 | return; |
---|
1346 | } |
---|
1347 | |
---|
1348 | // This stuff in needed in order to interface with the Cross Section Handler |
---|
1349 | |
---|
1350 | G4double G4PenelopeIonisation::CalculateCrossSectionsRatio(G4double ene,G4double cutoff, |
---|
1351 | G4int Z,G4double electronVolumeDensity, |
---|
1352 | const G4ParticleDefinition& particle) |
---|
1353 | { |
---|
1354 | //Constants |
---|
1355 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
1356 | G4double gamma2 = gamma*gamma; |
---|
1357 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
1358 | G4double constant = pi*classic_electr_radius*classic_electr_radius*2.0*electron_mass_c2/beta2; |
---|
1359 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
1360 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size(); |
---|
1361 | G4double S0 = 0.0, H0=0.0; |
---|
1362 | G4double softCS = 0.0; |
---|
1363 | G4double hardCS = 0.0; |
---|
1364 | for (G4int i=0;i<nbOsc;i++){ |
---|
1365 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
1366 | if (&particle == G4Electron::Electron()) |
---|
1367 | { |
---|
1368 | S0 = CrossSectionsRatioForElectrons(ene,resEnergy,delta,cutoff,1); |
---|
1369 | H0 = CrossSectionsRatioForElectrons(ene,resEnergy,delta,cutoff,2); |
---|
1370 | } |
---|
1371 | else if (&particle == G4Positron::Positron()) |
---|
1372 | { |
---|
1373 | S0 = CrossSectionsRatioForPositrons(ene,resEnergy,delta,cutoff,1); |
---|
1374 | H0 = CrossSectionsRatioForPositrons(ene,resEnergy,delta,cutoff,2); |
---|
1375 | } |
---|
1376 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i]; |
---|
1377 | softCS += occupNb*constant*S0; |
---|
1378 | hardCS += occupNb*constant*H0; |
---|
1379 | } |
---|
1380 | G4double ratio = 0.0; |
---|
1381 | if (softCS+hardCS) ratio = (hardCS)/(softCS+hardCS); |
---|
1382 | return ratio; |
---|
1383 | } |
---|
1384 | |
---|
1385 | |
---|
1386 | G4double G4PenelopeIonisation::CrossSectionsRatioForElectrons(G4double ene,G4double resEne, |
---|
1387 | G4double delta,G4double cutoff, |
---|
1388 | G4int index) |
---|
1389 | { |
---|
1390 | //Calculate constants |
---|
1391 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
1392 | G4double gamma2 = gamma*gamma; |
---|
1393 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
1394 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
1395 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)) ; |
---|
1396 | G4double hardCont = 0.0; |
---|
1397 | G4double softCont = 0.0; |
---|
1398 | if (ene < resEne) return 0.0; |
---|
1399 | |
---|
1400 | //Distant interactions |
---|
1401 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
1402 | G4double cp1 = std::sqrt(cp1s); |
---|
1403 | G4double cp = std::sqrt(cps); |
---|
1404 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
1405 | |
---|
1406 | //Distant longitudinal interactions |
---|
1407 | G4double qm = 0.0; |
---|
1408 | |
---|
1409 | if (resEne > ene*(1e-6)) |
---|
1410 | { |
---|
1411 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
1412 | } |
---|
1413 | else |
---|
1414 | { |
---|
1415 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
1416 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
1417 | } |
---|
1418 | |
---|
1419 | if (qm < resEne) |
---|
1420 | { |
---|
1421 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
1422 | } |
---|
1423 | else |
---|
1424 | { |
---|
1425 | sdLong = 0.0; |
---|
1426 | } |
---|
1427 | |
---|
1428 | if (sdLong > 0) { |
---|
1429 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
1430 | sdDist = sdTrans + sdLong; |
---|
1431 | if (cutoff > resEne) |
---|
1432 | { |
---|
1433 | softCont = sdDist/resEne; |
---|
1434 | } |
---|
1435 | else |
---|
1436 | { |
---|
1437 | hardCont = sdDist/resEne; |
---|
1438 | } |
---|
1439 | } |
---|
1440 | |
---|
1441 | |
---|
1442 | // Close collisions (Moeller's cross section) |
---|
1443 | G4double wl = std::max(cutoff,resEne); |
---|
1444 | G4double wu = 0.5*ene; |
---|
1445 | |
---|
1446 | if (wl < (wu-1*eV)) |
---|
1447 | { |
---|
1448 | hardCont += (1.0/(ene-wu))-(1.0/(ene-wl)) |
---|
1449 | - (1.0/wu)+(1.0/wl) |
---|
1450 | + (1.0-amol)*std::log(((ene-wu)*wl)/((ene-wl)*wu))/ene |
---|
1451 | + amol*(wu-wl)/(ene*ene); |
---|
1452 | wu=wl; |
---|
1453 | } |
---|
1454 | |
---|
1455 | wl = resEne; |
---|
1456 | if (wl > (wu-1*eV)) { |
---|
1457 | if (index == 1) return softCont; |
---|
1458 | if (index == 2) return hardCont; |
---|
1459 | } |
---|
1460 | softCont += (1.0/(ene-wu))-(1.0/(ene-wl)) |
---|
1461 | - (1.0/wu)+(1.0/wl) |
---|
1462 | + (1.0-amol)*std::log(((ene-wu)*wl)/((ene-wl)*wu))/ene |
---|
1463 | + amol*(wu-wl)/(ene*ene); |
---|
1464 | if (index == 1) return softCont; |
---|
1465 | return hardCont; |
---|
1466 | } |
---|
1467 | |
---|
1468 | G4double G4PenelopeIonisation::CrossSectionsRatioForPositrons(G4double ene,G4double resEne, |
---|
1469 | G4double delta,G4double cutoff,G4int index) |
---|
1470 | { |
---|
1471 | //Calculate constants |
---|
1472 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
1473 | G4double gamma2 = gamma*gamma; |
---|
1474 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
1475 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
1476 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)) ; |
---|
1477 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
1478 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
1479 | G4double bha2 = amol*(3.0+1.0/help); |
---|
1480 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
1481 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
1482 | G4double hardCont = 0.0; |
---|
1483 | G4double softCont = 0.0; |
---|
1484 | if (ene < resEne) return 0.0; |
---|
1485 | |
---|
1486 | |
---|
1487 | //Distant interactions |
---|
1488 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
1489 | G4double cp1 = std::sqrt(cp1s); |
---|
1490 | G4double cp = std::sqrt(cps); |
---|
1491 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
1492 | |
---|
1493 | //Distant longitudinal interactions |
---|
1494 | G4double qm = 0.0; |
---|
1495 | |
---|
1496 | if (resEne > ene*(1e-6)) |
---|
1497 | { |
---|
1498 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
1499 | } |
---|
1500 | else |
---|
1501 | { |
---|
1502 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
1503 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
1504 | } |
---|
1505 | |
---|
1506 | if (qm < resEne) |
---|
1507 | { |
---|
1508 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
1509 | } |
---|
1510 | else |
---|
1511 | { |
---|
1512 | sdLong = 0.0; |
---|
1513 | } |
---|
1514 | |
---|
1515 | if (sdLong > 0) { |
---|
1516 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
1517 | sdDist = sdTrans + sdLong; |
---|
1518 | if (cutoff > resEne) |
---|
1519 | { |
---|
1520 | softCont = sdDist/resEne; |
---|
1521 | } |
---|
1522 | else |
---|
1523 | { |
---|
1524 | hardCont = sdDist/resEne; |
---|
1525 | } |
---|
1526 | } |
---|
1527 | |
---|
1528 | |
---|
1529 | // Close collisions (Bhabha's cross section) |
---|
1530 | G4double wl = std::max(cutoff,resEne); |
---|
1531 | G4double wu = ene; |
---|
1532 | |
---|
1533 | if (wl < (wu-1*eV)) { |
---|
1534 | hardCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/ene |
---|
1535 | + bha2*(wu-wl)/(ene*ene) -bha3*((wu*wu)-(wl*wl))/(2.0*ene*ene*ene) |
---|
1536 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene*ene); |
---|
1537 | wu=wl; |
---|
1538 | } |
---|
1539 | wl = resEne; |
---|
1540 | if (wl > (wu-1*eV)) |
---|
1541 | { |
---|
1542 | if (index == 1) return softCont; |
---|
1543 | if (index == 2) return hardCont; |
---|
1544 | } |
---|
1545 | softCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/ene |
---|
1546 | + bha2*(wu-wl)/(ene*ene) -bha3*((wu*wu)-(wl*wl))/(2.0*ene*ene*ene) |
---|
1547 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene*ene); |
---|
1548 | |
---|
1549 | if (index == 1) return softCont; |
---|
1550 | return hardCont; |
---|
1551 | } |
---|