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 | // $Id: G4IntraNucleiCascader.cc,v 1.68 2010/09/25 06:44:30 mkelsey Exp $ |
---|
26 | // Geant4 tag: $Name: hadr-casc-V09-03-85 $ |
---|
27 | // |
---|
28 | // 20100114 M. Kelsey -- Remove G4CascadeMomentum, use G4LorentzVector directly |
---|
29 | // 20100307 M. Kelsey -- Bug fix: momentum_out[0] should be momentum_out.e() |
---|
30 | // 20100309 M. Kelsey -- Eliminate some unnecessary std::pow() |
---|
31 | // 20100407 M. Kelsey -- Pass "all_particles" as argument to initializeCascad, |
---|
32 | // following recent change to G4NucleiModel. |
---|
33 | // 20100413 M. Kelsey -- Pass G4CollisionOutput by ref to ::collide() |
---|
34 | // 20100517 M. Kelsey -- Inherit from common base class, make other colliders |
---|
35 | // simple data members |
---|
36 | // 20100616 M. Kelsey -- Add reporting of final residual particle |
---|
37 | // 20100617 M. Kelsey -- Remove "RUN" preprocessor flag and all "#else" code, |
---|
38 | // pass verbosity to collider. Make G4NucleiModel a data member, |
---|
39 | // instead of creating and deleting on every cycle. |
---|
40 | // 20100620 M. Kelsey -- Improved diagnostic messages. Simplify kinematics |
---|
41 | // of recoil nucleus. |
---|
42 | // 20100622 M. Kelsey -- Use local "bindingEnergy()" to call through. |
---|
43 | // 20100623 M. Kelsey -- Undo G4NucleiModel change from 0617. Does not work |
---|
44 | // properly across multiple interactions. |
---|
45 | // 20100627 M. Kelsey -- Protect recoil nucleus energy from floating roundoff |
---|
46 | // by setting small +ve or -ve values to zero. |
---|
47 | // 20100701 M. Kelsey -- Let excitation energy be handled by G4InuclNuclei, |
---|
48 | // allow for ground-state recoil (goodCase == true for Eex==0.) |
---|
49 | // 20100702 M. Kelsey -- Negative energy recoil should be rejected |
---|
50 | // 20100706 D. Wright -- Copy "abandoned" cparticles to output list, copy |
---|
51 | // mesonic "excitons" to output list; should be absorbed, fix up |
---|
52 | // diagnostic messages. |
---|
53 | // 20100713 M. Kelsey -- Add more diagnostics for Dennis' changes. |
---|
54 | // 20100714 M. Kelsey -- Switch to new G4CascadeColliderBase class, remove |
---|
55 | // sanity check on afin/zfin (not valid). |
---|
56 | // 20100715 M. Kelsey -- Add diagnostic for ekin_in vs. actual ekin; reduce |
---|
57 | // KE across Coulomb barrier. Rearrange end-of-loop if blocks, |
---|
58 | // add conservation check at end. |
---|
59 | // 20100716 M. Kelsey -- Eliminate inter_case; use base-class functionality. |
---|
60 | // Add minimum-fragment requirement for recoil, in order to |
---|
61 | // allow for momentum balancing |
---|
62 | // 20100720 M. Kelsey -- Make EPCollider pointer member |
---|
63 | // 20100721 M. Kelsey -- Turn on conservation checks unconditionally (override |
---|
64 | // new G4CASCADE_CHECK_ECONS setting |
---|
65 | // 20100722 M. Kelsey -- Move cascade output buffers to .hh file |
---|
66 | // 20100728 M. Kelsey -- Make G4NucleiModel data member for persistence, |
---|
67 | // delete colliders in destructor |
---|
68 | // 20100906 M. Kelsey -- Hide "non-physical fragment" behind verbose flag |
---|
69 | // 20100907 M. Kelsey -- Add makeResidualFragment function to create object |
---|
70 | // 20100909 M. Kelsey -- Remove all local "fragment" stuff, use RecoilMaker. |
---|
71 | // move goodCase() to RecoilMaker. |
---|
72 | // 20100910 M. Kelsey -- Use RecoilMaker::makeRecoilFragment(). |
---|
73 | // 20100915 M. Kelsey -- Define functions to deal with trapped particles, |
---|
74 | // move the exciton container to a data member |
---|
75 | // 20100916 M. Kelsey -- Put decay photons directly onto output list |
---|
76 | // 20100921 M. Kelsey -- Migrate to RecoilMaker::makeRecoilNuclei(). |
---|
77 | // 20100924 M. Kelsey -- Minor shuffling of post-cascade recoil building. |
---|
78 | // Create G4Fragment for recoil and store in output. |
---|
79 | |
---|
80 | #include "G4IntraNucleiCascader.hh" |
---|
81 | #include "G4CascadParticle.hh" |
---|
82 | #include "G4CascadeRecoilMaker.hh" |
---|
83 | #include "G4ElementaryParticleCollider.hh" |
---|
84 | #include "G4CollisionOutput.hh" |
---|
85 | #include "G4DecayTable.hh" |
---|
86 | #include "G4DecayProducts.hh" |
---|
87 | #include "G4HadTmpUtil.hh" |
---|
88 | #include "G4InuclElementaryParticle.hh" |
---|
89 | #include "G4InuclNuclei.hh" |
---|
90 | #include "G4InuclSpecialFunctions.hh" |
---|
91 | #include "G4LorentzConvertor.hh" |
---|
92 | #include "G4NucleiModel.hh" |
---|
93 | #include "G4ParticleLargerEkin.hh" |
---|
94 | #include "Randomize.hh" |
---|
95 | #include <algorithm> |
---|
96 | |
---|
97 | using namespace G4InuclSpecialFunctions; |
---|
98 | |
---|
99 | |
---|
100 | typedef std::vector<G4InuclElementaryParticle>::iterator particleIterator; |
---|
101 | |
---|
102 | G4IntraNucleiCascader::G4IntraNucleiCascader() |
---|
103 | : G4CascadeColliderBase("G4IntraNucleiCascader"), |
---|
104 | model(new G4NucleiModel), |
---|
105 | theElementaryParticleCollider(new G4ElementaryParticleCollider), |
---|
106 | theRecoilMaker(new G4CascadeRecoilMaker) {} |
---|
107 | |
---|
108 | G4IntraNucleiCascader::~G4IntraNucleiCascader() { |
---|
109 | delete model; |
---|
110 | delete theElementaryParticleCollider; |
---|
111 | delete theRecoilMaker; |
---|
112 | } |
---|
113 | |
---|
114 | |
---|
115 | void G4IntraNucleiCascader::collide(G4InuclParticle* bullet, |
---|
116 | G4InuclParticle* target, |
---|
117 | G4CollisionOutput& globalOutput) { |
---|
118 | if (verboseLevel) G4cout << " >>> G4IntraNucleiCascader::collide " << G4endl; |
---|
119 | |
---|
120 | const G4int itry_max = 1000; |
---|
121 | const G4int reflection_cut = 500; |
---|
122 | |
---|
123 | const G4double small_ekin = 0.001*MeV; // Tolerance for round-off zero |
---|
124 | const G4double quasielast_cut = 1*MeV; // To recover elastic scatters |
---|
125 | |
---|
126 | // Configure processing modules |
---|
127 | model->setVerboseLevel(verboseLevel); |
---|
128 | theElementaryParticleCollider->setVerboseLevel(verboseLevel); |
---|
129 | theRecoilMaker->setVerboseLevel(verboseLevel); |
---|
130 | theRecoilMaker->setTolerance(small_ekin); |
---|
131 | |
---|
132 | // Energy/momentum conservation usually requires a recoiling nuclear fragment |
---|
133 | // This cut will be increased on each "itry" if momentum could not balance. |
---|
134 | G4double minimum_recoil_A = 0.; // Nuclear fragment required |
---|
135 | |
---|
136 | if (verboseLevel > 3) { |
---|
137 | bullet->printParticle(); |
---|
138 | target->printParticle(); |
---|
139 | } |
---|
140 | |
---|
141 | G4InuclNuclei* tnuclei = dynamic_cast<G4InuclNuclei*>(target); |
---|
142 | if (!tnuclei) { |
---|
143 | if (verboseLevel) |
---|
144 | G4cerr << " Target is not a nucleus. Abandoning." << G4endl; |
---|
145 | return; |
---|
146 | } |
---|
147 | |
---|
148 | interCase.set(bullet,target); // Classify collision type |
---|
149 | |
---|
150 | model->generateModel(tnuclei); |
---|
151 | |
---|
152 | G4double coulombBarrier = 0.00126*tnuclei->getZ()/ |
---|
153 | (1.+G4cbrt(tnuclei->getA())); |
---|
154 | |
---|
155 | G4LorentzVector momentum_in = bullet->getMomentum() + target->getMomentum(); |
---|
156 | |
---|
157 | if (verboseLevel > 3) { |
---|
158 | model->printModel(); |
---|
159 | G4cout << " intitial momentum E " << momentum_in.e() << " Px " |
---|
160 | << momentum_in.x() << " Py " << momentum_in.y() << " Pz " |
---|
161 | << momentum_in.z() << G4endl; |
---|
162 | } |
---|
163 | |
---|
164 | // Bullet may be nucleus or simple particle |
---|
165 | G4InuclNuclei* bnuclei = dynamic_cast<G4InuclNuclei*>(bullet); |
---|
166 | G4InuclElementaryParticle* bparticle = |
---|
167 | dynamic_cast<G4InuclElementaryParticle*>(bullet); |
---|
168 | |
---|
169 | G4int itry = 0; |
---|
170 | while (itry < itry_max) { |
---|
171 | itry++; |
---|
172 | if (verboseLevel > 2) { |
---|
173 | G4cout << " itry " << itry << " inter_case " << interCase.code() |
---|
174 | << G4endl; |
---|
175 | } |
---|
176 | |
---|
177 | model->reset(); // Start new cascade process |
---|
178 | output.reset(); |
---|
179 | cascad_particles.clear(); |
---|
180 | output_particles.clear(); |
---|
181 | theExitonConfiguration.clear(); |
---|
182 | |
---|
183 | if (interCase.hadNucleus()) { // particle with nuclei |
---|
184 | if (verboseLevel > 3) |
---|
185 | G4cout << " bparticle charge " << bparticle->getCharge() |
---|
186 | << " baryon number " << bparticle->baryon() << G4endl; |
---|
187 | |
---|
188 | cascad_particles.push_back(model->initializeCascad(bparticle)); |
---|
189 | } else { // nuclei with nuclei |
---|
190 | G4int ab = bnuclei->getA(); |
---|
191 | G4int zb = bnuclei->getZ(); |
---|
192 | |
---|
193 | G4NucleiModel::modelLists all_particles; // Buffer to receive lists |
---|
194 | model->initializeCascad(bnuclei, tnuclei, all_particles); |
---|
195 | |
---|
196 | cascad_particles = all_particles.first; |
---|
197 | |
---|
198 | output_particles.insert(output_particles.end(), |
---|
199 | all_particles.second.begin(), |
---|
200 | all_particles.second.end()); |
---|
201 | |
---|
202 | if (cascad_particles.size() == 0) { // compound nuclei |
---|
203 | G4int i; |
---|
204 | |
---|
205 | for (i = 0; i < ab; i++) { |
---|
206 | G4int knd = i < zb ? 1 : 2; |
---|
207 | theExitonConfiguration.incrementQP(knd); |
---|
208 | }; |
---|
209 | |
---|
210 | G4int ihn = G4int(2 * (ab-zb) * inuclRndm() + 0.5); |
---|
211 | G4int ihz = G4int(2 * zb * inuclRndm() + 0.5); |
---|
212 | |
---|
213 | for (i = 0; i < ihn; i++) theExitonConfiguration.incrementHoles(2); |
---|
214 | for (i = 0; i < ihz; i++) theExitonConfiguration.incrementHoles(1); |
---|
215 | } |
---|
216 | } // if (interCase ... |
---|
217 | |
---|
218 | new_cascad_particles.clear(); |
---|
219 | G4int iloop = 0; |
---|
220 | |
---|
221 | while (!cascad_particles.empty() && !model->empty()) { |
---|
222 | iloop++; |
---|
223 | |
---|
224 | if (verboseLevel > 2) { |
---|
225 | G4cout << " Iteration " << iloop << ": Number of cparticles " |
---|
226 | << cascad_particles.size() << " last one: " << G4endl; |
---|
227 | cascad_particles.back().print(); |
---|
228 | } |
---|
229 | |
---|
230 | new_cascad_particles = model->generateParticleFate(cascad_particles.back(), |
---|
231 | theElementaryParticleCollider); |
---|
232 | if (verboseLevel > 2) { |
---|
233 | G4cout << " After generate fate: New particles " |
---|
234 | << new_cascad_particles.size() << G4endl |
---|
235 | << " Discarding last cparticle from list " << G4endl; |
---|
236 | } |
---|
237 | |
---|
238 | cascad_particles.pop_back(); |
---|
239 | |
---|
240 | // handle the result of a new step |
---|
241 | |
---|
242 | if (new_cascad_particles.size() == 1) { // last particle goes without interaction |
---|
243 | const G4CascadParticle& currentCParticle = new_cascad_particles[0]; |
---|
244 | |
---|
245 | if (model->stillInside(currentCParticle)) { |
---|
246 | if (verboseLevel > 3) |
---|
247 | G4cout << " particle still inside nucleus " << G4endl; |
---|
248 | |
---|
249 | if (currentCParticle.getNumberOfReflections() < reflection_cut && |
---|
250 | model->worthToPropagate(currentCParticle)) { |
---|
251 | if (verboseLevel > 3) G4cout << " continue reflections " << G4endl; |
---|
252 | cascad_particles.push_back(currentCParticle); |
---|
253 | } else { |
---|
254 | processTrappedParticle(currentCParticle); |
---|
255 | } // reflection or exciton |
---|
256 | |
---|
257 | } else { // particle about to leave nucleus - check for Coulomb barrier |
---|
258 | if (verboseLevel > 3) G4cout << " possible escape " << G4endl; |
---|
259 | |
---|
260 | const G4InuclElementaryParticle& currentParticle = |
---|
261 | currentCParticle.getParticle(); |
---|
262 | |
---|
263 | G4double KE = currentParticle.getKineticEnergy(); |
---|
264 | G4double mass = currentParticle.getMass(); |
---|
265 | G4double Q = currentParticle.getCharge(); |
---|
266 | |
---|
267 | if (verboseLevel > 3) |
---|
268 | G4cout << " KE " << KE << " barrier " << Q*coulombBarrier << G4endl; |
---|
269 | |
---|
270 | if (KE < Q*coulombBarrier) { |
---|
271 | // Calculate barrier penetration |
---|
272 | G4double CBP = 0.0; |
---|
273 | |
---|
274 | // if (KE > 0.0001) CBP = std::exp(-0.00126*tnuclei->getZ()*0.25* |
---|
275 | // (1./KE - 1./coulombBarrier)); |
---|
276 | if (KE > 0.0001) CBP = std::exp(-0.0181*0.5*tnuclei->getZ()* |
---|
277 | (1./KE - 1./coulombBarrier)* |
---|
278 | std::sqrt(mass*(coulombBarrier-KE)) ); |
---|
279 | |
---|
280 | if (G4UniformRand() < CBP) { |
---|
281 | if (verboseLevel > 3) { |
---|
282 | G4cout << " tunneled " << G4endl; |
---|
283 | currentParticle.printParticle(); |
---|
284 | } |
---|
285 | // Tunnelling through barrier leaves KE unchanged |
---|
286 | output_particles.push_back(currentParticle); |
---|
287 | } else { |
---|
288 | processTrappedParticle(currentCParticle); |
---|
289 | } |
---|
290 | } else { |
---|
291 | if (verboseLevel > 3) G4cout << " Goes out " << G4endl; |
---|
292 | |
---|
293 | output_particles.push_back(currentParticle); |
---|
294 | |
---|
295 | /***** |
---|
296 | // Adjust kinetic energy by height of potential (+ve or -ve) |
---|
297 | G4double newKE = KE - Q*coulombBarrier; |
---|
298 | output_particles.back().setKineticEnergy(newKE); |
---|
299 | *****/ |
---|
300 | |
---|
301 | if (verboseLevel > 3) output_particles.back().printParticle(); |
---|
302 | } |
---|
303 | } |
---|
304 | } else { // interaction |
---|
305 | if (verboseLevel > 3) |
---|
306 | G4cout << " interacted, adding new to list " << G4endl; |
---|
307 | |
---|
308 | cascad_particles.insert(cascad_particles.end(), |
---|
309 | new_cascad_particles.begin(), |
---|
310 | new_cascad_particles.end()); |
---|
311 | |
---|
312 | std::pair<G4int, G4int> holes = model->getTypesOfNucleonsInvolved(); |
---|
313 | if (verboseLevel > 3) |
---|
314 | G4cout << " adding new exciton holes " << holes.first << "," |
---|
315 | << holes.second << G4endl; |
---|
316 | |
---|
317 | theExitonConfiguration.incrementHoles(holes.first); |
---|
318 | |
---|
319 | if (holes.second > 0) |
---|
320 | theExitonConfiguration.incrementHoles(holes.second); |
---|
321 | } // if (new_cascad_particles ... |
---|
322 | |
---|
323 | // Evaluate nuclear residue |
---|
324 | theRecoilMaker->collide(bullet,target,output_particles,cascad_particles); |
---|
325 | |
---|
326 | G4double aresid = theRecoilMaker->getRecoilA(); |
---|
327 | if (verboseLevel > 2) { |
---|
328 | G4cout << " cparticles remaining " << cascad_particles.size() |
---|
329 | << " nucleus (model) has " |
---|
330 | << model->getNumberOfNeutrons() << " n, " |
---|
331 | << model->getNumberOfProtons() << " p " |
---|
332 | << " residual fragment A " << aresid << G4endl; |
---|
333 | } |
---|
334 | |
---|
335 | if (aresid <= minimum_recoil_A) break; // Must have minimum fragment |
---|
336 | } // while cascade-list and model |
---|
337 | |
---|
338 | // Add left-over cascade particles to output |
---|
339 | for (G4int i = 0; i < G4int(cascad_particles.size()); i++) |
---|
340 | output_particles.push_back(cascad_particles[i].getParticle()); |
---|
341 | |
---|
342 | // Cascade is finished. Check if it's OK. |
---|
343 | if (verboseLevel > 3) { |
---|
344 | G4cout << " Cascade finished " << G4endl |
---|
345 | << " output_particles " << output_particles.size() << G4endl; |
---|
346 | |
---|
347 | particleIterator ipart = output_particles.begin(); |
---|
348 | for (; ipart != output_particles.end(); ipart++) { |
---|
349 | ipart->printParticle(); |
---|
350 | G4cout << " charge " << ipart->getCharge() << " baryon number " |
---|
351 | << ipart->baryon() << G4endl; |
---|
352 | } |
---|
353 | } |
---|
354 | |
---|
355 | // Use last created recoil fragment instead of re-constructing |
---|
356 | G4int afin = theRecoilMaker->getRecoilA(); |
---|
357 | G4int zfin = theRecoilMaker->getRecoilZ(); |
---|
358 | |
---|
359 | // Sanity check before proceeding |
---|
360 | if (!theRecoilMaker->goodFragment() && !theRecoilMaker->wholeEvent()) { |
---|
361 | if (verboseLevel > 1) |
---|
362 | G4cerr << " Recoil nucleus is not physical: A=" << afin << " Z=" |
---|
363 | << zfin << G4endl; |
---|
364 | continue; // Discard event and try again |
---|
365 | } |
---|
366 | |
---|
367 | const G4LorentzVector& presid = theRecoilMaker->getRecoilMomentum(); |
---|
368 | |
---|
369 | if (verboseLevel > 1) { |
---|
370 | G4cout << " afin " << afin << " zfin " << zfin << G4endl; |
---|
371 | } |
---|
372 | |
---|
373 | if (afin == 0) break; // Whole event fragmented, exit |
---|
374 | |
---|
375 | if (afin == 1) { // Add bare nucleon to particle list |
---|
376 | G4int last_type = (zfin==1) ? 1 : 2; // proton=1, neutron=2 |
---|
377 | |
---|
378 | G4double mass = G4InuclElementaryParticle::getParticleMass(last_type); |
---|
379 | G4double mres = presid.m(); |
---|
380 | |
---|
381 | // Check for sensible kinematics |
---|
382 | if (mres-mass < -small_ekin) { // Insufficient recoil energy |
---|
383 | if (verboseLevel > 2) G4cerr << " unphysical recoil nucleon" << G4endl; |
---|
384 | continue; |
---|
385 | } |
---|
386 | |
---|
387 | if (mres-mass > small_ekin) { // Too much extra energy |
---|
388 | if (verboseLevel > 2) |
---|
389 | G4cerr << " extra energy with recoil nucleon" << G4endl; |
---|
390 | |
---|
391 | // FIXME: For now, we add the nucleon as unbalanced, and let |
---|
392 | // "SetOnShell" fudge things. This should be abandoned. |
---|
393 | } |
---|
394 | |
---|
395 | G4InuclElementaryParticle last_particle(presid, last_type, 4); |
---|
396 | |
---|
397 | if (verboseLevel > 3) { |
---|
398 | G4cout << " adding recoiling nucleon to output list" << G4endl; |
---|
399 | last_particle.printParticle(); |
---|
400 | } |
---|
401 | |
---|
402 | output_particles.push_back(last_particle); |
---|
403 | } |
---|
404 | |
---|
405 | // Process recoil fragment for consistency, exit or reject |
---|
406 | if (output_particles.size() == 1) { |
---|
407 | G4double Eex = theRecoilMaker->getRecoilExcitation(); |
---|
408 | if (std::abs(Eex) < quasielast_cut) { |
---|
409 | if (verboseLevel > 3) { |
---|
410 | G4cout << " quasi-elastic scatter with " << Eex << " MeV recoil" |
---|
411 | << G4endl; |
---|
412 | } |
---|
413 | |
---|
414 | theRecoilMaker->setRecoilExcitation(Eex=0.); |
---|
415 | if (verboseLevel > 3) { |
---|
416 | G4cout << " Eex reset to " << theRecoilMaker->getRecoilExcitation() |
---|
417 | << G4endl; |
---|
418 | } |
---|
419 | } |
---|
420 | } |
---|
421 | |
---|
422 | if (theRecoilMaker->goodNucleus()) { |
---|
423 | theRecoilMaker->addExcitonConfiguration(theExitonConfiguration); |
---|
424 | |
---|
425 | G4Fragment* recoilFrag = theRecoilMaker->makeRecoilFragment(); |
---|
426 | if (!recoilFrag) { |
---|
427 | G4cerr << "Got null pointer for recoil fragment!" << G4endl; |
---|
428 | continue; |
---|
429 | } |
---|
430 | output.addRecoilFragment(*recoilFrag); |
---|
431 | |
---|
432 | // TEMPORARY: Add both frag and nuclei, for code validation |
---|
433 | G4InuclNuclei* recoilNucl = theRecoilMaker->makeRecoilNuclei(4); |
---|
434 | if (!recoilFrag) { |
---|
435 | G4cerr << "Got null pointer for recoil nucleus!" << G4endl; |
---|
436 | continue; |
---|
437 | } |
---|
438 | output.addOutgoingNucleus(*recoilNucl); |
---|
439 | |
---|
440 | if (verboseLevel > 2) |
---|
441 | G4cout << " adding recoil nucleus/fragment to output list" << G4endl; |
---|
442 | } |
---|
443 | |
---|
444 | // Put final-state particle in "leading order" for return |
---|
445 | std::sort(output_particles.begin(), output_particles.end(), G4ParticleLargerEkin()); |
---|
446 | output.addOutgoingParticles(output_particles); |
---|
447 | |
---|
448 | // Adjust final state without fragment to balance momentum and energy |
---|
449 | if (afin <= 1) { |
---|
450 | output.setVerboseLevel(verboseLevel); |
---|
451 | output.setOnShell(bullet, target); |
---|
452 | output.setVerboseLevel(0); |
---|
453 | |
---|
454 | if (output.acceptable()) break; |
---|
455 | } else if (theRecoilMaker->goodNucleus()) break; |
---|
456 | |
---|
457 | // Cascade not physically reasonable |
---|
458 | if (afin <= minimum_recoil_A && minimum_recoil_A < tnuclei->getA()) { |
---|
459 | ++minimum_recoil_A; |
---|
460 | if (verboseLevel > 3) { |
---|
461 | G4cout << " minimum recoil fragment increased to A " << minimum_recoil_A |
---|
462 | << G4endl; |
---|
463 | } |
---|
464 | } |
---|
465 | } // while (itry < itry_max) |
---|
466 | |
---|
467 | // Cascade completed, for good or ill |
---|
468 | if (itry == itry_max) { |
---|
469 | if (verboseLevel > 3) { |
---|
470 | G4cout << " IntraNucleiCascader-> no inelastic interaction after " |
---|
471 | << itry_max << " attempts " << G4endl; |
---|
472 | } |
---|
473 | |
---|
474 | output.trivialise(bullet, target); |
---|
475 | } else if (verboseLevel) { |
---|
476 | G4cout << " IntraNucleiCascader output after trials " << itry << G4endl; |
---|
477 | } |
---|
478 | |
---|
479 | // Copy final generated cascade to output buffer for return |
---|
480 | globalOutput.add(output); |
---|
481 | return; |
---|
482 | } |
---|
483 | |
---|
484 | |
---|
485 | // Convert particles which cannot escape into excitons (or eject/decay them) |
---|
486 | |
---|
487 | void G4IntraNucleiCascader:: |
---|
488 | processTrappedParticle(const G4CascadParticle& trapped) { |
---|
489 | const G4InuclElementaryParticle& trappedP = trapped.getParticle(); |
---|
490 | |
---|
491 | G4int xtype = trappedP.type(); |
---|
492 | if (verboseLevel > 3) G4cout << " exciton of type " << xtype << G4endl; |
---|
493 | |
---|
494 | if (trappedP.nucleon()) { // normal exciton (proton or neutron) |
---|
495 | theExitonConfiguration.incrementQP(xtype); |
---|
496 | return; |
---|
497 | } |
---|
498 | |
---|
499 | if (trappedP.hyperon()) { // Not nucleon, so must be hyperon |
---|
500 | decayTrappedParticle(trapped); |
---|
501 | return; |
---|
502 | } |
---|
503 | |
---|
504 | // non-standard exciton; release it |
---|
505 | // FIXME: this is a meson, so need to absorb it |
---|
506 | if (verboseLevel > 3) { |
---|
507 | G4cout << " non-standard should be absorbed, now released" << G4endl; |
---|
508 | trapped.print(); |
---|
509 | } |
---|
510 | |
---|
511 | output_particles.push_back(trappedP); |
---|
512 | } |
---|
513 | |
---|
514 | |
---|
515 | // Decay unstable trapped particles, and add secondaries to processing list |
---|
516 | |
---|
517 | void G4IntraNucleiCascader:: |
---|
518 | decayTrappedParticle(const G4CascadParticle& trapped) { |
---|
519 | if (verboseLevel > 3) |
---|
520 | G4cout << " unstable must be decayed in flight" << G4endl; |
---|
521 | |
---|
522 | const G4InuclElementaryParticle& trappedP = trapped.getParticle(); |
---|
523 | |
---|
524 | G4DecayTable* unstable = trappedP.getDefinition()->GetDecayTable(); |
---|
525 | if (!unstable) { // No decay table; cannot decay! |
---|
526 | if (verboseLevel > 3) |
---|
527 | G4cerr << " no decay table! Releasing trapped particle" << G4endl; |
---|
528 | |
---|
529 | output_particles.push_back(trappedP); |
---|
530 | return; |
---|
531 | } |
---|
532 | |
---|
533 | // Get secondaries from decay in particle's rest frame |
---|
534 | G4DecayProducts* daughters = unstable->SelectADecayChannel()->DecayIt(); |
---|
535 | if (!daughters) { // No final state; cannot decay! |
---|
536 | if (verboseLevel > 3) |
---|
537 | G4cerr << " no daughters from trapped particle decay" << G4endl; |
---|
538 | |
---|
539 | output_particles.push_back(trappedP); |
---|
540 | return; |
---|
541 | } |
---|
542 | |
---|
543 | if (verboseLevel > 3) daughters->DumpInfo(); |
---|
544 | |
---|
545 | // Convert secondaries to lab frame |
---|
546 | G4double decayEnergy = trappedP.getEnergy(); |
---|
547 | G4ThreeVector decayDir = trappedP.getMomentum().vect().unit(); |
---|
548 | daughters->Boost(decayEnergy, decayDir); |
---|
549 | |
---|
550 | // Put all the secondaries onto the list for propagation |
---|
551 | const G4ThreeVector& decayPos = trapped.getPosition(); |
---|
552 | G4int zone = trapped.getCurrentZone(); |
---|
553 | G4int gen = trapped.getGeneration()+1; |
---|
554 | |
---|
555 | for (G4int i=0; i<daughters->entries(); i++) { |
---|
556 | G4DynamicParticle* idaug = (*daughters)[i]; |
---|
557 | |
---|
558 | G4InuclElementaryParticle idaugEP(*idaug, 4); |
---|
559 | |
---|
560 | // Only hadronic secondaries can be propagated; photons escape |
---|
561 | if (idaugEP.isPhoton()) output_particles.push_back(idaugEP); |
---|
562 | else { |
---|
563 | G4CascadParticle idaugCP(idaugEP, decayPos, zone, 0., gen); |
---|
564 | cascad_particles.push_back(idaugCP); |
---|
565 | } |
---|
566 | } |
---|
567 | } |
---|