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 | // * * |
---|
21 | // * Parts of this code which have been developed by QinetiQ Ltd * |
---|
22 | // * under contract to the European Space Agency (ESA) are the * |
---|
23 | // * intellectual property of ESA. Rights to use, copy, modify and * |
---|
24 | // * redistribute this software for general public use are granted * |
---|
25 | // * in compliance with any licensing, distribution and development * |
---|
26 | // * policy adopted by the Geant4 Collaboration. This code has been * |
---|
27 | // * written by QinetiQ Ltd for the European Space Agency, under ESA * |
---|
28 | // * contract 17191/03/NL/LvH (Aurora Programme). * |
---|
29 | // * * |
---|
30 | // * By using, copying, modifying or distributing the software (or * |
---|
31 | // * any work based on the software) you agree to acknowledge its * |
---|
32 | // * use in resulting scientific publications, and indicate your * |
---|
33 | // * acceptance of all terms of the Geant4 Software license. * |
---|
34 | // ******************************************************************** |
---|
35 | // |
---|
36 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
37 | // |
---|
38 | // MODULE: G4WilsonAblationModel.cc |
---|
39 | // |
---|
40 | // Version: B.1 |
---|
41 | // Date: 15/04/04 |
---|
42 | // Author: P R Truscott |
---|
43 | // Organisation: QinetiQ Ltd, UK |
---|
44 | // Customer: ESA/ESTEC, NOORDWIJK |
---|
45 | // Contract: 17191/03/NL/LvH |
---|
46 | // |
---|
47 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
48 | // |
---|
49 | // CHANGE HISTORY |
---|
50 | // -------------- |
---|
51 | // |
---|
52 | // 6 October 2003, P R Truscott, QinetiQ Ltd, UK |
---|
53 | // Created. |
---|
54 | // |
---|
55 | // 15 March 2004, P R Truscott, QinetiQ Ltd, UK |
---|
56 | // Beta release |
---|
57 | // |
---|
58 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
59 | //////////////////////////////////////////////////////////////////////////////// |
---|
60 | // |
---|
61 | #include "G4WilsonAblationModel.hh" |
---|
62 | #include "Randomize.hh" |
---|
63 | #include "G4ParticleTable.hh" |
---|
64 | #include "G4IonTable.hh" |
---|
65 | #include "G4Alpha.hh" |
---|
66 | #include "G4He3.hh" |
---|
67 | #include "G4Triton.hh" |
---|
68 | #include "G4Deuteron.hh" |
---|
69 | #include "G4Proton.hh" |
---|
70 | #include "G4Neutron.hh" |
---|
71 | #include "G4AlphaEvaporationChannel.hh" |
---|
72 | #include "G4He3EvaporationChannel.hh" |
---|
73 | #include "G4TritonEvaporationChannel.hh" |
---|
74 | #include "G4DeuteronEvaporationChannel.hh" |
---|
75 | #include "G4ProtonEvaporationChannel.hh" |
---|
76 | #include "G4NeutronEvaporationChannel.hh" |
---|
77 | #include "G4LorentzVector.hh" |
---|
78 | #include "G4VEvaporationChannel.hh" |
---|
79 | |
---|
80 | #include <iomanip> |
---|
81 | #include <numeric> |
---|
82 | //////////////////////////////////////////////////////////////////////////////// |
---|
83 | // |
---|
84 | G4WilsonAblationModel::G4WilsonAblationModel() |
---|
85 | { |
---|
86 | // |
---|
87 | // |
---|
88 | // Send message to stdout to advise that the G4Abrasion model is being used. |
---|
89 | // |
---|
90 | PrintWelcomeMessage(); |
---|
91 | // |
---|
92 | // |
---|
93 | // Set the default verbose level to 0 - no output. |
---|
94 | // |
---|
95 | verboseLevel = 0; |
---|
96 | // |
---|
97 | // |
---|
98 | // Set the binding energy per nucleon .... did I mention that this is a crude |
---|
99 | // model for nuclear de-excitation? |
---|
100 | // |
---|
101 | B = 10.0 * MeV; |
---|
102 | // |
---|
103 | // |
---|
104 | // It is possuble to switch off secondary particle production (other than the |
---|
105 | // final nuclear fragment). The default is on. |
---|
106 | // |
---|
107 | produceSecondaries = true; |
---|
108 | // |
---|
109 | // |
---|
110 | // Now we need to define the decay modes. We're using the G4Evaporation model |
---|
111 | // to help determine the kinematics of the decay. |
---|
112 | // |
---|
113 | nFragTypes = 6; |
---|
114 | fragType[0] = G4Alpha::Alpha(); |
---|
115 | fragType[1] = G4He3::He3(); |
---|
116 | fragType[2] = G4Triton::Triton(); |
---|
117 | fragType[3] = G4Deuteron::Deuteron(); |
---|
118 | fragType[4] = G4Proton::Proton(); |
---|
119 | fragType[5] = G4Neutron::Neutron(); |
---|
120 | // |
---|
121 | // |
---|
122 | // Set verboseLevel default to no output. |
---|
123 | // |
---|
124 | verboseLevel = 0; |
---|
125 | } |
---|
126 | //////////////////////////////////////////////////////////////////////////////// |
---|
127 | // |
---|
128 | G4WilsonAblationModel::~G4WilsonAblationModel() |
---|
129 | {;} |
---|
130 | //////////////////////////////////////////////////////////////////////////////// |
---|
131 | // |
---|
132 | G4FragmentVector *G4WilsonAblationModel::BreakItUp |
---|
133 | (const G4Fragment &theNucleus) |
---|
134 | { |
---|
135 | // |
---|
136 | // |
---|
137 | // Initilise the pointer to the G4FragmentVector used to return the information |
---|
138 | // about the breakup. |
---|
139 | // |
---|
140 | fragmentVector = new G4FragmentVector; |
---|
141 | fragmentVector->clear(); |
---|
142 | // |
---|
143 | // |
---|
144 | // Get the A, Z and excitation of the nucleus. |
---|
145 | // |
---|
146 | G4int A = (G4int) theNucleus.GetA(); |
---|
147 | G4int Z = (G4int) theNucleus.GetZ(); |
---|
148 | G4double ex = theNucleus.GetExcitationEnergy(); |
---|
149 | if (verboseLevel >= 2) |
---|
150 | { |
---|
151 | G4cout <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
152 | <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
153 | <<G4endl; |
---|
154 | G4cout.precision(6); |
---|
155 | G4cout <<"IN G4WilsonAblationModel" <<G4endl; |
---|
156 | G4cout <<"Initial prefragment A=" <<A |
---|
157 | <<", Z=" <<Z |
---|
158 | <<", excitation energy = " <<ex/MeV <<" MeV" |
---|
159 | <<G4endl; |
---|
160 | } |
---|
161 | // |
---|
162 | // |
---|
163 | // Check that there is a nucleus to speak of. It's possible there isn't one |
---|
164 | // or its just a proton or neutron. In either case, the excitation energy |
---|
165 | // (from the Lorentz vector) is not used. |
---|
166 | // |
---|
167 | if (A == 0) |
---|
168 | { |
---|
169 | if (verboseLevel >= 2) |
---|
170 | { |
---|
171 | G4cout <<"No nucleus to decay" <<G4endl; |
---|
172 | G4cout <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
173 | <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
174 | <<G4endl; |
---|
175 | } |
---|
176 | return fragmentVector; |
---|
177 | } |
---|
178 | else if (A == 1) |
---|
179 | { |
---|
180 | G4LorentzVector lorentzVector = theNucleus.GetMomentum(); |
---|
181 | lorentzVector.setE(lorentzVector.e()-ex+10.0*eV); |
---|
182 | if (Z == 0) |
---|
183 | { |
---|
184 | G4Fragment *fragment = new G4Fragment(lorentzVector,G4Neutron::Neutron()); |
---|
185 | fragmentVector->push_back(fragment); |
---|
186 | } |
---|
187 | else |
---|
188 | { |
---|
189 | G4Fragment *fragment = new G4Fragment(lorentzVector,G4Proton::Proton()); |
---|
190 | fragmentVector->push_back(fragment); |
---|
191 | } |
---|
192 | if (verboseLevel >= 2) |
---|
193 | { |
---|
194 | G4cout <<"Final fragment is in fact only a nucleon) :" <<G4endl; |
---|
195 | G4cout <<(*fragmentVector)[0] <<G4endl; |
---|
196 | G4cout <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
197 | <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
198 | <<G4endl; |
---|
199 | } |
---|
200 | return fragmentVector; |
---|
201 | } |
---|
202 | // |
---|
203 | // |
---|
204 | // Then the number of nucleons ablated (either as nucleons or light nuclear |
---|
205 | // fragments) is based on a simple argument for the binding energy per nucleon. |
---|
206 | // |
---|
207 | G4int DAabl = (G4int) (ex / B); |
---|
208 | if (DAabl > A) DAabl = A; |
---|
209 | if (verboseLevel >= 2) |
---|
210 | G4cout <<"Number of nucleons ejected = " <<DAabl <<G4endl; |
---|
211 | |
---|
212 | // |
---|
213 | // |
---|
214 | // Determine the nuclear fragment from the ablation process by sampling the |
---|
215 | // Rudstam equation. |
---|
216 | // |
---|
217 | G4int AF = A - DAabl; |
---|
218 | G4int ZF = 0; |
---|
219 | if (AF > 0) |
---|
220 | { |
---|
221 | G4double AFd = static_cast<G4double>(AF); |
---|
222 | G4double R = 11.8 / std::pow(AFd, 0.45); |
---|
223 | G4int minZ = Z - DAabl; |
---|
224 | if (minZ <= 0) minZ = 1; |
---|
225 | // |
---|
226 | // |
---|
227 | // Here we define an integral probability distribution based on the Rudstam |
---|
228 | // equation assuming a constant AF. |
---|
229 | // |
---|
230 | G4double sig[100]; |
---|
231 | G4double sum = 0.0; |
---|
232 | for (G4int ii=minZ; ii<= Z; ii++) |
---|
233 | { |
---|
234 | sum += std::exp(-R*std::pow(std::abs(ii - 0.486*AFd + 3.8E-04*AFd*AFd),1.5)); |
---|
235 | sig[ii] = sum; |
---|
236 | } |
---|
237 | // |
---|
238 | // |
---|
239 | // Now sample that distribution to determine a value for ZF. |
---|
240 | // |
---|
241 | G4double xi = G4UniformRand(); |
---|
242 | G4int iz = minZ; |
---|
243 | G4bool found = false; |
---|
244 | while (iz <= Z && !found) |
---|
245 | { |
---|
246 | found = (xi <= sig[iz]/sum); |
---|
247 | if (!found) iz++; |
---|
248 | } |
---|
249 | if (iz > Z) |
---|
250 | ZF = Z; |
---|
251 | else |
---|
252 | ZF = iz; |
---|
253 | } |
---|
254 | G4int DZabl = Z - ZF; |
---|
255 | if (verboseLevel >= 2) |
---|
256 | G4cout <<"Final fragment A=" <<AF |
---|
257 | <<", Z=" <<ZF |
---|
258 | <<G4endl; |
---|
259 | // |
---|
260 | // |
---|
261 | // Now determine the nucleons or nuclei which have bee ablated. The preference |
---|
262 | // is for the production of alphas, then other nuclei in order of decreasing |
---|
263 | // binding energy. The energies assigned to the products of the decay are |
---|
264 | // provisional for the moment (the 10eV is just to avoid errors with negative |
---|
265 | // excitation energies due to rounding). |
---|
266 | // |
---|
267 | G4double totalEpost = 0.0; |
---|
268 | evapType.clear(); |
---|
269 | for (G4int ift=0; ift<nFragTypes; ift++) |
---|
270 | { |
---|
271 | G4ParticleDefinition *type = fragType[ift]; |
---|
272 | G4double n = std::floor((G4double) DAabl / type->GetBaryonNumber() + 1.0E-10); |
---|
273 | G4double n1 = 1.0E+10; |
---|
274 | if (fragType[ift]->GetPDGCharge() > 0.0) |
---|
275 | n1 = std::floor((G4double) DZabl / type->GetPDGCharge() + 1.0E-10); |
---|
276 | if (n > n1) n = n1; |
---|
277 | if (n > 0.0) |
---|
278 | { |
---|
279 | G4double mass = type->GetPDGMass(); |
---|
280 | for (G4int j=0; j<(G4int) n; j++) |
---|
281 | { |
---|
282 | totalEpost += mass; |
---|
283 | evapType.push_back(type); |
---|
284 | } |
---|
285 | DAabl -= (G4int) (n * type->GetBaryonNumber() + 1.0E-10); |
---|
286 | DZabl -= (G4int) (n * type->GetPDGCharge() + 1.0E-10); |
---|
287 | if (verboseLevel >= 2) |
---|
288 | G4cout <<"Particle type: " <<std::setw(10) <<type->GetParticleName() |
---|
289 | <<", number of particles emitted = " <<n |
---|
290 | <<G4endl; |
---|
291 | } |
---|
292 | } |
---|
293 | // |
---|
294 | // |
---|
295 | // Determine the properties of the final nuclear fragment. |
---|
296 | // |
---|
297 | G4double massFinalFrag = 0.0; |
---|
298 | if (AF > 0.0) |
---|
299 | massFinalFrag = G4ParticleTable::GetParticleTable()->GetIonTable()-> |
---|
300 | GetIonMass(ZF,AF); |
---|
301 | totalEpost += massFinalFrag; |
---|
302 | // |
---|
303 | // |
---|
304 | // Add the total energy from the fragment. Note that the fragment is assumed |
---|
305 | // to be de-excited and does not undergo photo-evaporation .... I did mention |
---|
306 | // this is a bit of a crude model? |
---|
307 | // |
---|
308 | G4double massPreFrag = theNucleus.GetGroundStateMass(); |
---|
309 | G4double totalEpre = massPreFrag + ex; |
---|
310 | G4double excess = totalEpre - totalEpost; |
---|
311 | // G4Fragment *resultNucleus(theNucleus); |
---|
312 | G4Fragment *resultNucleus = new G4Fragment(A, Z, theNucleus.GetMomentum()); |
---|
313 | G4ThreeVector boost(0.0,0.0,0.0); |
---|
314 | G4int nEvap = 0; |
---|
315 | if (produceSecondaries && evapType.size()>0) |
---|
316 | { |
---|
317 | if (excess > 0.0) |
---|
318 | { |
---|
319 | SelectSecondariesByEvaporation (resultNucleus); |
---|
320 | nEvap = fragmentVector->size(); |
---|
321 | boost = resultNucleus->GetMomentum().findBoostToCM(); |
---|
322 | if (evapType.size() > 0) |
---|
323 | SelectSecondariesByDefault (boost); |
---|
324 | } |
---|
325 | else |
---|
326 | SelectSecondariesByDefault(G4ThreeVector(0.0,0.0,0.0)); |
---|
327 | } |
---|
328 | if (AF > 0) |
---|
329 | { |
---|
330 | G4double mass = G4ParticleTable::GetParticleTable()->GetIonTable()-> |
---|
331 | GetIonMass(ZF,AF); |
---|
332 | G4double e = mass + 10.0*eV; |
---|
333 | G4double p = std::sqrt(e*e-mass*mass); |
---|
334 | G4ThreeVector direction(0.0,0.0,1.0); |
---|
335 | G4LorentzVector lorentzVector = G4LorentzVector(direction*p, e); |
---|
336 | lorentzVector.boost(-boost); |
---|
337 | *resultNucleus = G4Fragment(AF, ZF, lorentzVector); |
---|
338 | fragmentVector->push_back(resultNucleus); |
---|
339 | } |
---|
340 | // |
---|
341 | // |
---|
342 | // Provide verbose output on the ablation products if requested. |
---|
343 | // |
---|
344 | if (verboseLevel >= 2) |
---|
345 | { |
---|
346 | if (nEvap > 0) |
---|
347 | { |
---|
348 | G4cout <<"----------------------" <<G4endl; |
---|
349 | G4cout <<"Evaporated particles :" <<G4endl; |
---|
350 | G4cout <<"----------------------" <<G4endl; |
---|
351 | } |
---|
352 | G4int ie = 0; |
---|
353 | G4FragmentVector::iterator iter; |
---|
354 | for (iter = fragmentVector->begin(); iter != fragmentVector->end(); ++iter) |
---|
355 | { |
---|
356 | if (ie == nEvap) |
---|
357 | { |
---|
358 | G4cout <<*iter <<G4endl; |
---|
359 | G4cout <<"---------------------------------" <<G4endl; |
---|
360 | G4cout <<"Particles from default emission :" <<G4endl; |
---|
361 | G4cout <<"---------------------------------" <<G4endl; |
---|
362 | } |
---|
363 | G4cout <<*iter <<G4endl; |
---|
364 | } |
---|
365 | G4cout <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
366 | <<"oooooooooooooooooooooooooooooooooooooooo" |
---|
367 | <<G4endl; |
---|
368 | } |
---|
369 | |
---|
370 | return fragmentVector; |
---|
371 | } |
---|
372 | //////////////////////////////////////////////////////////////////////////////// |
---|
373 | // |
---|
374 | void G4WilsonAblationModel::SelectSecondariesByEvaporation |
---|
375 | (G4Fragment *intermediateNucleus) |
---|
376 | { |
---|
377 | G4bool evaporate = true; |
---|
378 | while (evaporate && evapType.size() != 0) |
---|
379 | { |
---|
380 | // |
---|
381 | // |
---|
382 | // Here's the cheaky bit. We're hijacking the G4Evaporation model, in order to |
---|
383 | // more accurately sample to kinematics, but the species of the nuclear |
---|
384 | // fragments will be the ones of our choosing as above. |
---|
385 | // |
---|
386 | std::vector <G4VEvaporationChannel*> theChannels; |
---|
387 | theChannels.clear(); |
---|
388 | VectorOfFragmentTypes::iterator iter; |
---|
389 | std::vector <VectorOfFragmentTypes::iterator> iters; |
---|
390 | iters.clear(); |
---|
391 | iter = std::find(evapType.begin(), evapType.end(), G4Alpha::Alpha()); |
---|
392 | if (iter != evapType.end()) |
---|
393 | { |
---|
394 | theChannels.push_back(new G4AlphaEvaporationChannel); |
---|
395 | iters.push_back(iter); |
---|
396 | } |
---|
397 | iter = std::find(evapType.begin(), evapType.end(), G4He3::He3()); |
---|
398 | if (iter != evapType.end()) |
---|
399 | { |
---|
400 | theChannels.push_back(new G4He3EvaporationChannel); |
---|
401 | iters.push_back(iter); |
---|
402 | } |
---|
403 | iter = std::find(evapType.begin(), evapType.end(), G4Triton::Triton()); |
---|
404 | if (iter != evapType.end()) |
---|
405 | { |
---|
406 | theChannels.push_back(new G4TritonEvaporationChannel); |
---|
407 | iters.push_back(iter); |
---|
408 | } |
---|
409 | iter = std::find(evapType.begin(), evapType.end(), G4Deuteron::Deuteron()); |
---|
410 | if (iter != evapType.end()) |
---|
411 | { |
---|
412 | theChannels.push_back(new G4DeuteronEvaporationChannel); |
---|
413 | iters.push_back(iter); |
---|
414 | } |
---|
415 | iter = std::find(evapType.begin(), evapType.end(), G4Proton::Proton()); |
---|
416 | if (iter != evapType.end()) |
---|
417 | { |
---|
418 | theChannels.push_back(new G4ProtonEvaporationChannel); |
---|
419 | iters.push_back(iter); |
---|
420 | } |
---|
421 | iter = std::find(evapType.begin(), evapType.end(), G4Neutron::Neutron()); |
---|
422 | if (iter != evapType.end()) |
---|
423 | { |
---|
424 | theChannels.push_back(new G4NeutronEvaporationChannel); |
---|
425 | iters.push_back(iter); |
---|
426 | } |
---|
427 | G4int nChannels = theChannels.size(); |
---|
428 | |
---|
429 | std::vector<G4VEvaporationChannel*>::iterator iterEv; |
---|
430 | for (iterEv=theChannels.begin(); iterEv!=theChannels.end(); iterEv++) |
---|
431 | (*iterEv)->Initialize(*intermediateNucleus); |
---|
432 | G4double totalProb = std::accumulate(theChannels.begin(), |
---|
433 | theChannels.end(), 0.0, SumProbabilities()); |
---|
434 | if (totalProb > 0.0) |
---|
435 | { |
---|
436 | // |
---|
437 | // |
---|
438 | // The emission probability for at least one of the evaporation channels is |
---|
439 | // positive, therefore work out which one should be selected and decay |
---|
440 | // the nucleus. |
---|
441 | // |
---|
442 | G4double totalProb1 = 0.0; |
---|
443 | G4double probEvapType[6] = {0.0}; |
---|
444 | for (G4int ich=0; ich<nChannels; ich++) |
---|
445 | { |
---|
446 | totalProb1 += theChannels[ich]->GetEmissionProbability(); |
---|
447 | probEvapType[ich] = totalProb1 / totalProb; |
---|
448 | } |
---|
449 | G4double xi = G4UniformRand(); |
---|
450 | G4int i = 0; |
---|
451 | for (i=0; i<nChannels; i++) |
---|
452 | if (xi < probEvapType[i]) break; |
---|
453 | if (i > nChannels) i = nChannels - 1; |
---|
454 | G4FragmentVector *evaporationResult = theChannels[i]-> |
---|
455 | BreakUp(*intermediateNucleus); |
---|
456 | fragmentVector->push_back((*evaporationResult)[0]); |
---|
457 | *intermediateNucleus = *(*evaporationResult)[1]; |
---|
458 | delete evaporationResult->back(); |
---|
459 | delete evaporationResult; |
---|
460 | evapType.erase(iters[i]); |
---|
461 | } |
---|
462 | else |
---|
463 | { |
---|
464 | // |
---|
465 | // |
---|
466 | // Probability for further evaporation is nil so have to escape from this |
---|
467 | // routine and set the energies of the secondaries to 10eV. |
---|
468 | // |
---|
469 | evaporate = false; |
---|
470 | } |
---|
471 | } |
---|
472 | |
---|
473 | return; |
---|
474 | } |
---|
475 | //////////////////////////////////////////////////////////////////////////////// |
---|
476 | // |
---|
477 | void G4WilsonAblationModel::SelectSecondariesByDefault (G4ThreeVector boost) |
---|
478 | { |
---|
479 | for (unsigned i=0; i<evapType.size(); i++) |
---|
480 | { |
---|
481 | G4ParticleDefinition *type = fragType[i]; |
---|
482 | G4double mass = type->GetPDGMass(); |
---|
483 | G4double e = mass + 10.0*eV; |
---|
484 | G4double p = std::sqrt(e*e-mass*mass); |
---|
485 | G4double costheta = 2.0*G4UniformRand() - 1.0; |
---|
486 | G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta)); |
---|
487 | G4double phi = twopi * G4UniformRand() * rad; |
---|
488 | G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta); |
---|
489 | G4LorentzVector lorentzVector = G4LorentzVector(direction*p, e); |
---|
490 | lorentzVector.boost(-boost); |
---|
491 | G4Fragment *fragment = |
---|
492 | new G4Fragment(lorentzVector, type); |
---|
493 | fragmentVector->push_back(fragment); |
---|
494 | } |
---|
495 | } |
---|
496 | //////////////////////////////////////////////////////////////////////////////// |
---|
497 | // |
---|
498 | void G4WilsonAblationModel::PrintWelcomeMessage () |
---|
499 | { |
---|
500 | G4cout <<G4endl; |
---|
501 | G4cout <<" *****************************************************************" |
---|
502 | <<G4endl; |
---|
503 | G4cout <<" Nuclear ablation model for nuclear-nuclear interactions activated" |
---|
504 | <<G4endl; |
---|
505 | G4cout <<" (Written by QinetiQ Ltd for the European Space Agency)" |
---|
506 | <<G4endl; |
---|
507 | G4cout <<" *****************************************************************" |
---|
508 | <<G4endl; |
---|
509 | G4cout << G4endl; |
---|
510 | |
---|
511 | return; |
---|
512 | } |
---|
513 | //////////////////////////////////////////////////////////////////////////////// |
---|
514 | // |
---|