source: trunk/source/processes/hadronic/models/qmd/src/G4QMDReaction.cc@ 1201

Last change on this file since 1201 was 1196, checked in by garnier, 16 years ago

update CVS release candidate geant4.9.3.01
File size: 25.0 KB
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25//
26// 080505 Fixed and changed sampling method of impact parameter by T. Koi
27// 080602 Fix memory leaks by T. Koi
28// 080612 Delete unnecessary dependency and unused functions
29// Change criterion of reaction by T. Koi
30// 081107 Add UnUseGEM (then use the default channel of G4Evaporation)
31// UseFrag (chage criterion of a inelastic reaction)
32// Fix bug in nucleon projectiles by T. Koi
33// 090122 Be8 -> Alpha + Alpha
34// 090331 Change member shenXS and genspaXS object to pointer
35// 091119 Fix for incidence of neutral particles
36//
37#include "G4QMDReaction.hh"
38#include "G4QMDNucleus.hh"
39#include "G4QMDGroundStateNucleus.hh"
40
41#include "G4NistManager.hh"
42
43G4QMDReaction::G4QMDReaction()
44: system ( NULL )
45, deltaT ( 1 ) // in fsec
46, maxTime ( 100 ) // will have maxTime-th time step
47, gem ( true )
48, frag ( false )
49{
50
51 //090331
52 shenXS = new G4IonsShenCrossSection();
53 //genspaXS = new G4GeneralSpaceNNCrossSection();
54 meanField = new G4QMDMeanField();
55 collision = new G4QMDCollision();
56
57 excitationHandler = new G4ExcitationHandler;
58 evaporation = new G4Evaporation;
59 excitationHandler->SetEvaporation( evaporation );
60 setEvaporationCh();
61}
62
63
64
65G4QMDReaction::~G4QMDReaction()
66{
67 delete evaporation;
68 delete excitationHandler;
69 delete collision;
70 delete meanField;
71}
72
73
74
75G4HadFinalState* G4QMDReaction::ApplyYourself( const G4HadProjectile & projectile , G4Nucleus & target )
76{
77 //G4cout << "G4QMDReaction::ApplyYourself" << G4endl;
78
79 theParticleChange.Clear();
80
81 system = new G4QMDSystem;
82
83 G4int proj_Z = 0;
84 G4int proj_A = 0;
85 G4ParticleDefinition* proj_pd = ( G4ParticleDefinition* ) projectile.GetDefinition();
86 if ( proj_pd->GetParticleType() == "nucleus" )
87 {
88 proj_Z = proj_pd->GetAtomicNumber();
89 proj_A = proj_pd->GetAtomicMass();
90 }
91 else
92 {
93 proj_Z = (int)( proj_pd->GetPDGCharge()/eplus );
94 proj_A = 1;
95 }
96 G4int targ_Z = int ( target.GetZ() + 0.5 );
97 G4int targ_A = int ( target.GetN() + 0.5 );
98 G4ParticleDefinition* targ_pd = G4ParticleTable::GetParticleTable()->GetIon( targ_Z , targ_A , 0.0 );
99
100
101 G4NistManager* nistMan = G4NistManager::Instance();
102// G4Element* G4NistManager::FindOrBuildElement( targ_Z );
103
104 const G4DynamicParticle* proj_dp = new G4DynamicParticle ( proj_pd , projectile.Get4Momentum() );
105 const G4Element* targ_ele = nistMan->FindOrBuildElement( targ_Z );
106 G4double aTemp = projectile.GetMaterial()->GetTemperature();
107
108 //090331
109 G4double xs_0 = shenXS->GetCrossSection ( proj_dp , targ_ele , aTemp );
110 //G4double xs_0 = genspaXS->GetCrossSection ( proj_dp , targ_ele , aTemp );
111 G4double bmax_0 = std::sqrt( xs_0 / pi );
112 //std::cout << "bmax_0 in fm (fermi) " << bmax_0/fermi << std::endl;
113
114 //delete proj_dp;
115
116 G4bool elastic = true;
117
118 std::vector< G4QMDNucleus* > nucleuses; // Secondary nuceluses
119 G4ThreeVector boostToReac; // ReactionSystem (CM or NN);
120 G4ThreeVector boostBackToLAB; // Reaction System to LAB;
121
122 G4LorentzVector targ4p( G4ThreeVector( 0.0 ) , targ_pd->GetPDGMass()/GeV );
123 G4ThreeVector boostLABtoCM = targ4p.findBoostToCM( proj_dp->Get4Momentum()/GeV ); // CM of target and proj;
124
125 G4double p1 = proj_dp->GetMomentum().mag()/GeV/proj_A;
126 G4double m1 = proj_dp->GetDefinition()->GetPDGMass()/GeV/proj_A;
127 G4double e1 = std::sqrt( p1*p1 + m1*m1 );
128 G4double e2 = targ_pd->GetPDGMass()/GeV/targ_A;
129 G4double beta_nn = -p1 / ( e1+e2 );
130
131 G4ThreeVector boostLABtoNN ( 0. , 0. , beta_nn ); // CM of NN;
132
133 G4double beta_nncm = ( - boostLABtoCM.beta() + boostLABtoNN.beta() ) / ( 1 - boostLABtoCM.beta() * boostLABtoNN.beta() ) ;
134
135 //std::cout << targ4p << std::endl;
136 //std::cout << proj_dp->Get4Momentum()<< std::endl;
137 //std::cout << beta_nncm << std::endl;
138 G4ThreeVector boostNNtoCM( 0. , 0. , beta_nncm ); //
139 G4ThreeVector boostCMtoNN( 0. , 0. , -beta_nncm ); //
140
141 boostToReac = boostLABtoNN;
142 boostBackToLAB = -boostLABtoNN;
143
144 delete proj_dp;
145
146 while ( elastic )
147 {
148
149// impact parameter
150 G4double bmax = 1.05*(bmax_0/fermi); // 10% for Peripheral reactions
151 G4double b = bmax * std::sqrt ( G4UniformRand() );
152//071112
153 //G4double b = 0;
154 //G4double b = bmax;
155 //G4double b = bmax/1.05 * 0.7 * G4UniformRand();
156
157 //G4cout << "G4QMDRESULT bmax_0 = " << bmax_0/fermi << " fm, bmax = " << bmax << " fm , b = " << b << " fm " << G4endl;
158
159 G4double plab = projectile.GetTotalMomentum()/GeV;
160 G4double elab = (projectile.GetKineticEnergy() + proj_pd->GetPDGMass() + targ_pd->GetPDGMass() )/GeV;
161
162 calcOffSetOfCollision( b , proj_pd , targ_pd , plab , elab , bmax , boostCMtoNN );
163
164// Projectile
165 G4LorentzVector proj4pLAB = projectile.Get4Momentum()/GeV;
166
167 G4QMDGroundStateNucleus* proj(NULL);
168 if ( projectile.GetDefinition()->GetParticleType() == "nucleus"
169 || projectile.GetDefinition()->GetParticleName() == "proton"
170 || projectile.GetDefinition()->GetParticleName() == "neutron" )
171 {
172
173 proj_Z = proj_pd->GetAtomicNumber();
174 proj_A = proj_pd->GetAtomicMass();
175
176 proj = new G4QMDGroundStateNucleus( proj_Z , proj_A );
177 //proj->ShowParticipants();
178
179 }
180
181 meanField->SetSystem ( proj );
182 proj->SetTotalPotential( meanField->GetTotalPotential() );
183 proj->CalEnergyAndAngularMomentumInCM();
184
185// Target
186 G4int iz = int ( target.GetZ() );
187 G4int ia = int ( target.GetN() );
188
189 G4QMDGroundStateNucleus* targ = new G4QMDGroundStateNucleus( iz , ia );
190
191 meanField->SetSystem (targ );
192 targ->SetTotalPotential( meanField->GetTotalPotential() );
193 targ->CalEnergyAndAngularMomentumInCM();
194
195 //G4LorentzVector targ4p( G4ThreeVector( 0.0 ) , targ->GetNuclearMass()/GeV );
196// Boost Vector to CM
197 //boostToCM = targ4p.findBoostToCM( proj4pLAB );
198
199// Target
200 for ( G4int i = 0 ; i < targ->GetTotalNumberOfParticipant() ; i++ )
201 {
202
203 G4ThreeVector p0 = targ->GetParticipant( i )->GetMomentum();
204 G4ThreeVector r0 = targ->GetParticipant( i )->GetPosition();
205
206 G4ThreeVector p ( p0.x() + coulomb_collision_px_targ
207 , p0.y()
208 , p0.z() * coulomb_collision_gamma_targ + coulomb_collision_pz_targ );
209
210 G4ThreeVector r ( r0.x() + coulomb_collision_rx_targ
211 , r0.y()
212 , r0.z() / coulomb_collision_gamma_targ + coulomb_collision_rz_targ );
213
214 system->SetParticipant( new G4QMDParticipant( targ->GetParticipant( i )->GetDefinition() , p , r ) );
215 system->GetParticipant( i )->SetTarget();
216
217 }
218
219 G4LorentzVector proj4pCM = CLHEP::boostOf ( proj4pLAB , boostToReac );
220 G4LorentzVector targ4pCM = CLHEP::boostOf ( targ4p , boostToReac );
221
222
223// Projectile
224 if ( proj != NULL )
225 {
226
227// projectile is nucleus
228
229 for ( G4int i = 0 ; i < proj->GetTotalNumberOfParticipant() ; i++ )
230 {
231
232 G4ThreeVector p0 = proj->GetParticipant( i )->GetMomentum();
233 G4ThreeVector r0 = proj->GetParticipant( i )->GetPosition();
234
235 G4ThreeVector p ( p0.x() + coulomb_collision_px_proj
236 , p0.y()
237 , p0.z() * coulomb_collision_gamma_proj + coulomb_collision_pz_proj );
238
239 G4ThreeVector r ( r0.x() + coulomb_collision_rx_proj
240 , r0.y()
241 , r0.z() / coulomb_collision_gamma_proj + coulomb_collision_rz_proj );
242
243 system->SetParticipant( new G4QMDParticipant( proj->GetParticipant( i )->GetDefinition() , p , r ) );
244 system->GetParticipant ( i + targ->GetTotalNumberOfParticipant() )->SetProjectile();
245 }
246
247 }
248 else
249 {
250
251// projectile is particle
252
253 G4int i = targ->GetTotalNumberOfParticipant();
254
255 G4ThreeVector p0( 0 );
256 G4ThreeVector r0( 0 );
257
258
259 G4ThreeVector p ( p0.x() + coulomb_collision_px_proj
260 , p0.y()
261 , p0.z() * coulomb_collision_gamma_proj + coulomb_collision_pz_proj );
262
263 G4ThreeVector r ( r0.x() + coulomb_collision_rx_proj
264 , r0.y()
265 , r0.z() / coulomb_collision_gamma_proj + coulomb_collision_rz_proj );
266
267 system->SetParticipant( new G4QMDParticipant( (G4ParticleDefinition*)projectile.GetDefinition() , p , r ) );
268 system->GetParticipant ( i )->SetProjectile();
269 }
270
271 delete targ;
272 delete proj;
273
274
275 meanField->SetSystem ( system );
276 collision->SetMeanField ( meanField );
277
278// Time Evolution
279 //std::cout << "Start time evolution " << std::endl;
280 //system->ShowParticipants();
281 for ( G4int i = 0 ; i < maxTime ; i++ )
282 {
283 //G4cout << " do Paropagate " << i << " th time step. " << G4endl;
284 meanField->DoPropagation( deltaT );
285 //system->ShowParticipants();
286 collision->CalKinematicsOfBinaryCollisions( deltaT );
287
288 if ( i / 10 * 10 == i )
289 {
290 //G4cout << i << " th time step. " << G4endl;
291 //system->ShowParticipants();
292 }
293 //system->ShowParticipants();
294 }
295 //system->ShowParticipants();
296
297
298 //std::cout << "Doing Cluster Judgment " << std::endl;
299
300 nucleuses = meanField->DoClusterJudgment();
301
302// Elastic Judgment
303
304 G4int numberOfSecondary = int ( nucleuses.size() ) + system->GetTotalNumberOfParticipant();
305
306 G4int sec_a_Z = 0;
307 G4int sec_a_A = 0;
308 G4ParticleDefinition* sec_a_pd = NULL;
309 G4int sec_b_Z = 0;
310 G4int sec_b_A = 0;
311 G4ParticleDefinition* sec_b_pd = NULL;
312
313 if ( numberOfSecondary == 2 )
314 {
315
316 G4bool elasticLike_system = false;
317 if ( nucleuses.size() == 2 )
318 {
319
320 sec_a_Z = nucleuses[0]->GetAtomicNumber();
321 sec_a_A = nucleuses[0]->GetMassNumber();
322 sec_b_Z = nucleuses[1]->GetAtomicNumber();
323 sec_b_A = nucleuses[1]->GetMassNumber();
324
325 if ( ( sec_a_Z == proj_Z && sec_a_A == proj_A && sec_b_Z == targ_Z && sec_b_A == targ_A )
326 || ( sec_a_Z == targ_Z && sec_a_A == targ_A && sec_b_Z == proj_Z && sec_b_A == proj_A ) )
327 {
328 elasticLike_system = true;
329 }
330
331 }
332 else if ( nucleuses.size() == 1 )
333 {
334
335 sec_a_Z = nucleuses[0]->GetAtomicNumber();
336 sec_a_A = nucleuses[0]->GetMassNumber();
337 sec_b_pd = system->GetParticipant( 0 )->GetDefinition();
338
339 if ( ( sec_a_Z == proj_Z && sec_a_A == proj_A && sec_b_pd == targ_pd )
340 || ( sec_a_Z == targ_Z && sec_a_A == targ_A && sec_b_pd == proj_pd ) )
341 {
342 elasticLike_system = true;
343 }
344
345 }
346 else
347 {
348
349 sec_a_pd = system->GetParticipant( 0 )->GetDefinition();
350 sec_b_pd = system->GetParticipant( 1 )->GetDefinition();
351
352 if ( ( sec_a_pd == proj_pd && sec_b_pd == targ_pd )
353 || ( sec_a_pd == targ_pd && sec_b_pd == proj_pd ) )
354 {
355 elasticLike_system = true;
356 }
357
358 }
359
360 if ( elasticLike_system == true )
361 {
362
363 G4bool elasticLike_energy = true;
364// Cal ExcitationEnergy
365 for ( G4int i = 0 ; i < int ( nucleuses.size() ) ; i++ )
366 {
367
368 //meanField->SetSystem( nucleuses[i] );
369 meanField->SetNucleus( nucleuses[i] );
370 //nucleuses[i]->SetTotalPotential( meanField->GetTotalPotential() );
371 //nucleuses[i]->CalEnergyAndAngularMomentumInCM();
372
373 if ( nucleuses[i]->GetExcitationEnergy()*GeV > 1.0*MeV ) elasticLike_energy = false;
374
375 }
376
377// Check Collision
378 G4bool withCollision = true;
379 if ( system->GetNOCollision() == 0 ) withCollision = false;
380
381// Final judegement for Inelasitc or Elastic;
382//
383// ElasticLike without Collision
384 //if ( elasticLike_energy == true && withCollision == false ) elastic = true; // ielst = 0
385// ElasticLike with Collision
386 //if ( elasticLike_energy == true && withCollision == true ) elastic = true; // ielst = 1
387// InelasticLike without Collision
388 //if ( elasticLike_energy == false ) elastic = false; // ielst = 2
389 if ( frag == true )
390 if ( elasticLike_energy == false ) elastic = false;
391// InelasticLike with Collision
392 if ( elasticLike_energy == false && withCollision == true ) elastic = false; // ielst = 3
393
394 }
395
396 }
397 else
398 {
399
400// numberOfSecondary != 2
401 elastic = false;
402
403 }
404
405//071115
406 //G4cout << elastic << G4endl;
407 // if elastic is true try again from sampling of impact parameter
408
409 if ( elastic == true )
410 {
411 // delete this nucleues
412 for ( std::vector< G4QMDNucleus* >::iterator
413 it = nucleuses.begin() ; it != nucleuses.end() ; it++ )
414 {
415 delete *it;
416 }
417 nucleuses.clear();
418 }
419 }
420
421
422// Statical Decay Phase
423
424 for ( std::vector< G4QMDNucleus* >::iterator it
425 = nucleuses.begin() ; it != nucleuses.end() ; it++ )
426 {
427
428/*
429 std::cout << "G4QMDRESULT "
430 << (*it)->GetAtomicNumber()
431 << " "
432 << (*it)->GetMassNumber()
433 << " "
434 << (*it)->Get4Momentum()
435 << " "
436 << (*it)->Get4Momentum().vect()
437 << " "
438 << (*it)->Get4Momentum().restMass()
439 << " "
440 << (*it)->GetNuclearMass()/GeV
441 << std::endl;
442*/
443
444 meanField->SetNucleus ( *it );
445
446 if ( (*it)->GetAtomicNumber() == 0 // neutron cluster
447 || (*it)->GetAtomicNumber() == (*it)->GetMassNumber() ) // proton cluster
448 {
449 // push back system
450 for ( G4int i = 0 ; i < (*it)->GetTotalNumberOfParticipant() ; i++ )
451 {
452 G4QMDParticipant* aP = new G4QMDParticipant( ( (*it)->GetParticipant( i ) )->GetDefinition() , ( (*it)->GetParticipant( i ) )->GetMomentum() , ( (*it)->GetParticipant( i ) )->GetPosition() );
453 system->SetParticipant ( aP );
454 }
455 continue;
456 }
457
458 G4double nucleus_e = std::sqrt ( std::pow ( (*it)->GetNuclearMass()/GeV , 2 ) + std::pow ( (*it)->Get4Momentum().vect().mag() , 2 ) );
459 G4LorentzVector nucleus_p4CM ( (*it)->Get4Momentum().vect() , nucleus_e );
460
461// std::cout << "G4QMDRESULT nucleus deltaQ " << deltaQ << std::endl;
462
463 G4int ia = (*it)->GetMassNumber();
464 G4int iz = (*it)->GetAtomicNumber();
465
466 G4LorentzVector lv ( G4ThreeVector( 0.0 ) , (*it)->GetExcitationEnergy()*GeV + G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass( iz , ia ) );
467
468 G4Fragment* aFragment = new G4Fragment( ia , iz , lv );
469
470 G4ReactionProductVector* rv;
471 rv = excitationHandler->BreakItUp( *aFragment );
472 G4bool notBreak = true;
473 for ( G4ReactionProductVector::iterator itt
474 = rv->begin() ; itt != rv->end() ; itt++ )
475 {
476
477 notBreak = false;
478 // Secondary from this nucleus (*it)
479 G4ParticleDefinition* pd = (*itt)->GetDefinition();
480
481 G4LorentzVector p4 ( (*itt)->GetMomentum()/GeV , (*itt)->GetTotalEnergy()/GeV ); //in nucleus(*it) rest system
482 G4LorentzVector p4_CM = CLHEP::boostOf( p4 , -nucleus_p4CM.findBoostToCM() ); // Back to CM
483 G4LorentzVector p4_LAB = CLHEP::boostOf( p4_CM , boostBackToLAB ); // Back to LAB
484
485
486//090122
487 //theParticleChange.AddSecondary( dp );
488 if ( !( pd->GetAtomicNumber() == 4 && pd->GetAtomicMass() == 8 ) )
489 {
490 G4DynamicParticle* dp = new G4DynamicParticle( pd , p4_LAB*GeV );
491 theParticleChange.AddSecondary( dp );
492 }
493 else
494 {
495 //Be8 -> Alpha + Alpha + Q
496 G4ThreeVector randomized_direction( G4UniformRand() , G4UniformRand() , G4UniformRand() );
497 randomized_direction = randomized_direction.unit();
498 G4double q_decay = (*itt)->GetMass() - 2*G4Alpha::Alpha()->GetPDGMass();
499 G4double p_decay = std::sqrt ( std::pow(G4Alpha::Alpha()->GetPDGMass()+q_decay/2,2) - std::pow(G4Alpha::Alpha()->GetPDGMass() , 2 ) );
500 G4LorentzVector p4_a1 ( p_decay*randomized_direction , G4Alpha::Alpha()->GetPDGMass()+q_decay/2 ); //in Be8 rest system
501
502 G4LorentzVector p4_a1_Be8 = CLHEP::boostOf ( p4_a1/GeV , -p4.findBoostToCM() );
503 G4LorentzVector p4_a1_CM = CLHEP::boostOf ( p4_a1_Be8 , -nucleus_p4CM.findBoostToCM() );
504 G4LorentzVector p4_a1_LAB = CLHEP::boostOf ( p4_a1_CM , boostBackToLAB );
505
506 G4LorentzVector p4_a2 ( -p_decay*randomized_direction , G4Alpha::Alpha()->GetPDGMass()+q_decay/2 ); //in Be8 rest system
507
508 G4LorentzVector p4_a2_Be8 = CLHEP::boostOf ( p4_a2/GeV , -p4.findBoostToCM() );
509 G4LorentzVector p4_a2_CM = CLHEP::boostOf ( p4_a2_Be8 , -nucleus_p4CM.findBoostToCM() );
510 G4LorentzVector p4_a2_LAB = CLHEP::boostOf ( p4_a2_CM , boostBackToLAB );
511
512 G4DynamicParticle* dp1 = new G4DynamicParticle( G4Alpha::Alpha() , p4_a1_LAB*GeV );
513 G4DynamicParticle* dp2 = new G4DynamicParticle( G4Alpha::Alpha() , p4_a2_LAB*GeV );
514 theParticleChange.AddSecondary( dp1 );
515 theParticleChange.AddSecondary( dp2 );
516 }
517//090122
518
519/*
520 std::cout
521 << "Regist Secondary "
522 << (*itt)->GetDefinition()->GetParticleName()
523 << " "
524 << (*itt)->GetMomentum()/GeV
525 << " "
526 << (*itt)->GetKineticEnergy()/GeV
527 << " "
528 << (*itt)->GetMass()/GeV
529 << " "
530 << (*itt)->GetTotalEnergy()/GeV
531 << " "
532 << (*itt)->GetTotalEnergy()/GeV * (*itt)->GetTotalEnergy()/GeV
533 - (*itt)->GetMomentum()/GeV * (*itt)->GetMomentum()/GeV
534 << " "
535 << nucleus_p4CM.findBoostToCM()
536 << " "
537 << p4
538 << " "
539 << p4_CM
540 << " "
541 << p4_LAB
542 << std::endl;
543*/
544
545 }
546 if ( notBreak == true )
547 {
548
549 G4ParticleDefinition* pd = G4ParticleTable::GetParticleTable()->GetIon( (*it)->GetAtomicNumber() , (*it)->GetMassNumber(), (*it)->GetExcitationEnergy()*GeV );
550 G4LorentzVector p4_CM = nucleus_p4CM;
551 G4LorentzVector p4_LAB = CLHEP::boostOf( p4_CM , boostBackToLAB ); // Back to LAB
552 G4DynamicParticle* dp = new G4DynamicParticle( pd , p4_LAB*GeV );
553 theParticleChange.AddSecondary( dp );
554
555 }
556
557 for ( G4ReactionProductVector::iterator itt
558 = rv->begin() ; itt != rv->end() ; itt++ )
559 {
560 delete *itt;
561 }
562 delete rv;
563
564 delete aFragment;
565
566 }
567
568
569
570 for ( G4int i = 0 ; i < system->GetTotalNumberOfParticipant() ; i++ )
571 {
572
573 // Secondary particles
574
575 G4ParticleDefinition* pd = system->GetParticipant( i )->GetDefinition();
576 G4LorentzVector p4_CM = system->GetParticipant( i )->Get4Momentum();
577 G4LorentzVector p4_LAB = CLHEP::boostOf( p4_CM , boostBackToLAB );
578 G4DynamicParticle* dp = new G4DynamicParticle( pd , p4_LAB*GeV );
579 theParticleChange.AddSecondary( dp );
580
581/*
582 G4cout << "G4QMDRESULT "
583 << "r" << i << " " << system->GetParticipant ( i ) -> GetPosition() << " "
584 << "p" << i << " " << system->GetParticipant ( i ) -> Get4Momentum()
585 << G4endl;
586*/
587
588 }
589
590 for ( std::vector< G4QMDNucleus* >::iterator it
591 = nucleuses.begin() ; it != nucleuses.end() ; it++ )
592 {
593 delete *it; // delete nulceuse
594 }
595 nucleuses.clear();
596
597 system->Clear();
598 delete system;
599
600 theParticleChange.SetStatusChange( stopAndKill );
601
602 return &theParticleChange;
603
604}
605
606
607
608void G4QMDReaction::calcOffSetOfCollision( G4double b ,
609G4ParticleDefinition* pd_proj ,
610G4ParticleDefinition* pd_targ ,
611G4double ptot , G4double etot , G4double bmax , G4ThreeVector boostToCM )
612{
613 G4double mass_proj = pd_proj->GetPDGMass()/GeV;
614 G4double mass_targ = pd_targ->GetPDGMass()/GeV;
615
616 G4double stot = std::sqrt ( etot*etot - ptot*ptot );
617
618 G4double pstt = std::sqrt ( ( stot*stot - ( mass_proj + mass_targ ) * ( mass_proj + mass_targ )
619 ) * ( stot*stot - ( mass_proj - mass_targ ) * ( mass_proj - mass_targ ) ) )
620 / ( 2.0 * stot );
621
622 G4double pzcc = pstt;
623 G4double eccm = stot - ( mass_proj + mass_targ );
624
625 G4int zp = pd_proj->GetAtomicNumber();
626 G4int ap = pd_proj->GetAtomicMass();
627 G4int zt = pd_targ->GetAtomicNumber();
628 G4int at = pd_targ->GetAtomicMass();
629
630 //G4double rmax0 = 8.0; // T.K dicide parameter value // for low energy
631 G4double rmax0 = bmax + 4.0;
632 G4double rmax = std::sqrt( rmax0*rmax0 + b*b );
633
634 G4double ccoul = 0.001439767;
635 G4double pcca = 1.0 - double ( zp * zt ) * ccoul / eccm / rmax - ( b / rmax )*( b / rmax );
636
637 G4double pccf = std::sqrt( pcca );
638
639 //Fix for neutral particles
640 G4double aas1 = 0.0;
641 G4double bbs = 0.0;
642
643 if ( zp != 0 )
644 {
645 G4double aas = 2.0 * eccm * b / double ( zp * zt ) / ccoul;
646 bbs = 1.0 / std::sqrt ( 1.0 + aas*aas );
647 aas1 = ( 1.0 + aas * b / rmax ) * bbs;
648 }
649
650 G4double cost = 0.0;
651 G4double sint = 0.0;
652 G4double thet1 = 0.0;
653 G4double thet2 = 0.0;
654 if ( 1.0 - aas1*aas1 <= 0 || 1.0 - bbs*bbs <= 0.0 )
655 {
656 cost = 1.0;
657 sint = 0.0;
658 }
659 else
660 {
661 G4double aat1 = aas1 / std::sqrt ( 1.0 - aas1*aas1 );
662 G4double aat2 = bbs / std::sqrt ( 1.0 - bbs*bbs );
663
664 thet1 = std::atan ( aat1 );
665 thet2 = std::atan ( aat2 );
666
667// TK enter to else block
668 G4double theta = thet1 - thet2;
669 cost = std::cos( theta );
670 sint = std::sin( theta );
671 }
672
673 G4double rzpr = -rmax * cost * ( mass_targ ) / ( mass_proj + mass_targ );
674 G4double rzta = rmax * cost * ( mass_proj ) / ( mass_proj + mass_targ );
675
676 G4double rxpr = rmax / 2.0 * sint;
677
678 G4double rxta = -rxpr;
679
680
681 G4double pzpc = pzcc * ( cost * pccf + sint * b / rmax );
682 G4double pxpr = pzcc * ( -sint * pccf + cost * b / rmax );
683
684 G4double pztc = - pzpc;
685 G4double pxta = - pxpr;
686
687 G4double epc = std::sqrt ( pzpc*pzpc + pxpr*pxpr + mass_proj*mass_proj );
688 G4double etc = std::sqrt ( pztc*pztc + pxta*pxta + mass_targ*mass_targ );
689
690 G4double pzpr = pzpc;
691 G4double pzta = pztc;
692 G4double epr = epc;
693 G4double eta = etc;
694
695// CM -> NN
696 G4double gammacm = boostToCM.gamma();
697 //G4double betacm = -boostToCM.beta();
698 G4double betacm = boostToCM.z();
699 pzpr = pzpc + betacm * gammacm * ( gammacm / ( 1. + gammacm ) * pzpc * betacm + epc );
700 pzta = pztc + betacm * gammacm * ( gammacm / ( 1. + gammacm ) * pztc * betacm + etc );
701 epr = gammacm * ( epc + betacm * pzpc );
702 eta = gammacm * ( etc + betacm * pztc );
703
704 //G4double betpr = pzpr / epr;
705 //G4double betta = pzta / eta;
706
707 G4double gammpr = epr / ( mass_proj );
708 G4double gammta = eta / ( mass_targ );
709
710 pzta = pzta / double ( at );
711 pxta = pxta / double ( at );
712
713 pzpr = pzpr / double ( ap );
714 pxpr = pxpr / double ( ap );
715
716 G4double zeroz = 0.0;
717
718 rzpr = rzpr -zeroz;
719 rzta = rzta -zeroz;
720
721 // Set results
722 coulomb_collision_gamma_proj = gammpr;
723 coulomb_collision_rx_proj = rxpr;
724 coulomb_collision_rz_proj = rzpr;
725 coulomb_collision_px_proj = pxpr;
726 coulomb_collision_pz_proj = pzpr;
727
728 coulomb_collision_gamma_targ = gammta;
729 coulomb_collision_rx_targ = rxta;
730 coulomb_collision_rz_targ = rzta;
731 coulomb_collision_px_targ = pxta;
732 coulomb_collision_pz_targ = pzta;
733
734}
735
736
737
738void G4QMDReaction::setEvaporationCh()
739{
740
741 if ( gem == true )
742 evaporation->SetGEMChannel();
743 else
744 evaporation->SetDefaultChannel();
745
746}
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