source: trunk/source/processes/hadronic/models/qmd/src/G4QMDCollision.cc@ 1201

Last change on this file since 1201 was 1055, checked in by garnier, 17 years ago

maj sur la beta de geant 4.9.3
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24// ********************************************************************
25//
26// 080602 Fix memory leaks by T. Koi
27// 081120 Add deltaT in signature of CalKinematicsOfBinaryCollisions
28// Add several required updating of Mean Filed
29// Modified handling of absorption case by T. Koi
30// 090126 Fix in absorption case by T. Koi
31// 090331 Fix for gamma participant by T. Koi
32//
33#include "G4QMDCollision.hh"
34#include "G4Scatterer.hh"
35#include "Randomize.hh"
36
37G4QMDCollision::G4QMDCollision()
38: deltar ( 4 )
39, bcmax0 ( 1.323142 ) // NN maximum impact parameter
40, bcmax1 ( 2.523 ) // others maximum impact parameter
41, sig0 ( 55 ) // NN cross section
42, sig1 ( 200 ) // others cross section
43, epse ( 0.0001 )
44{
45 theScatterer = new G4Scatterer();
46}
47
48
49
50G4QMDCollision::~G4QMDCollision()
51{
52 delete theScatterer;
53}
54
55
56void G4QMDCollision::CalKinematicsOfBinaryCollisions( G4double dt )
57{
58 G4double deltaT = dt;
59
60 G4int n = theSystem->GetTotalNumberOfParticipant();
61//081118
62 //G4int nb = 0;
63 for ( G4int i = 0 ; i < n ; i++ )
64 {
65 theSystem->GetParticipant( i )->UnsetHitMark();
66 theSystem->GetParticipant( i )->UnsetHitMark();
67 //nb += theSystem->GetParticipant( i )->GetBaryonNumber();
68 }
69 //G4cout << "nb = " << nb << " n = " << n << G4endl;
70
71
72//071101
73 for ( G4int i = 0 ; i < n ; i++ )
74 {
75
76 //std::cout << i << " " << theSystem->GetParticipant( i )->GetDefinition()->GetParticleName() << " " << theSystem->GetParticipant( i )->GetPosition() << std::endl;
77
78 if ( theSystem->GetParticipant( i )->GetDefinition()->IsShortLived() )
79 {
80
81 G4bool decayed = false;
82
83 G4ParticleDefinition* pd0 = theSystem->GetParticipant( i )->GetDefinition();
84 G4ThreeVector p0 = theSystem->GetParticipant( i )->GetMomentum();
85 G4ThreeVector r0 = theSystem->GetParticipant( i )->GetPosition();
86
87 G4LorentzVector p40 = theSystem->GetParticipant( i )->Get4Momentum();
88
89 G4double eini = theMeanField->GetTotalPotential() + p40.e();
90
91 G4int n0 = theSystem->GetTotalNumberOfParticipant();
92 G4int i0 = 0;
93
94 G4bool isThisEnergyOK = false;
95
96 for ( G4int ii = 0 ; ii < 4 ; ii++ )
97 {
98
99 //G4LorentzVector p4 = theSystem->GetParticipant( i )->Get4Momentum();
100 G4LorentzVector p400 = p40;
101
102 p400 *= GeV;
103 //G4KineticTrack kt( theSystem->GetParticipant( i )->GetDefinition() , 0.0 , (theSystem->GetParticipant( i )->GetPosition())*fermi , p4 );
104 G4KineticTrack kt( pd0 , 0.0 , r0*fermi , p400 );
105 //std::cout << "G4KineticTrack " << i << " " << kt.GetDefinition()->GetParticleName() << kt.GetPosition() << std::endl;
106 G4KineticTrackVector* secs = NULL;
107 secs = kt.Decay();
108 G4int id = 0;
109 G4double et = 0;
110 if ( secs )
111 {
112 for ( G4KineticTrackVector::iterator it
113 = secs->begin() ; it != secs->end() ; it++ )
114 {
115/*
116 G4cout << "G4KineticTrack"
117 << " " << (*it)->GetDefinition()->GetParticleName()
118 << " " << (*it)->Get4Momentum()
119 << " " << (*it)->GetPosition()/fermi
120 << G4endl;
121*/
122 if ( id == 0 )
123 {
124 theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() );
125 theSystem->GetParticipant( i )->SetMomentum( (*it)->Get4Momentum().v()/GeV );
126 theSystem->GetParticipant( i )->SetPosition( (*it)->GetPosition()/fermi );
127 //theMeanField->Cal2BodyQuantities( i );
128 et += (*it)->Get4Momentum().e()/GeV;
129 }
130 if ( id > 0 )
131 {
132 // Append end;
133 theSystem->SetParticipant ( new G4QMDParticipant ( (*it)->GetDefinition() , (*it)->Get4Momentum().v()/GeV , (*it)->GetPosition()/fermi ) );
134 et += (*it)->Get4Momentum().e()/GeV;
135 if ( id > 1 )
136 {
137 //081118
138 //G4cout << "G4QMDCollision id >2; id= " << id << G4endl;
139 }
140 }
141 id++; // number of daughter particles
142
143 delete *it;
144 }
145
146 theMeanField->Update();
147 i0 = id-1; // 0 enter to i
148
149 delete secs;
150 }
151
152// EnergyCheck
153
154 G4double efin = theMeanField->GetTotalPotential() + et;
155 //std::cout << std::abs ( eini - efin ) - epse << std::endl;
156// std::cout << std::abs ( eini - efin ) - epse*10 << std::endl;
157// *10 TK
158 if ( std::abs ( eini - efin ) < epse*10 )
159 {
160 // Energy OK
161 isThisEnergyOK = true;
162 break;
163 }
164 else
165 {
166
167 theSystem->GetParticipant( i )->SetDefinition( pd0 );
168 theSystem->GetParticipant( i )->SetPosition( r0 );
169 theSystem->GetParticipant( i )->SetMomentum( p0 );
170
171 for ( G4int i0i = 0 ; i0i < id-1 ; i0i++ )
172 {
173 //081118
174 //std::cout << "Decay Energitically Blocked deleteing " << i0i+n0 << std::endl;
175 theSystem->DeleteParticipant( i0i+n0 );
176 }
177 //081103
178 theMeanField->Update();
179 }
180
181 }
182
183
184// Pauli Check
185 if ( isThisEnergyOK == true )
186 {
187 if ( theMeanField->IsPauliBlocked ( i ) != true )
188 {
189
190 G4bool allOK = true;
191 for ( G4int i0i = 0 ; i0i < i0 ; i0i++ )
192 {
193 if ( theMeanField->IsPauliBlocked ( i0i+n0 ) == true )
194 {
195 allOK = false;
196 break;
197 }
198 }
199
200 if ( allOK )
201 {
202 decayed = true; //Decay Succeeded
203 }
204 }
205
206 }
207//
208
209 if ( decayed )
210 {
211 //081119
212 //G4cout << "Decay Suceeded! " << std::endl;
213 theSystem->GetParticipant( i )->SetHitMark();
214 for ( G4int i0i = 0 ; i0i < i0 ; i0i++ )
215 {
216 theSystem->GetParticipant( i0i+n0 )->SetHitMark();
217 }
218
219 }
220 else
221 {
222
223// Decay Blocked and re-enter orginal participant;
224
225 if ( isThisEnergyOK == true ) // for false case already done
226 {
227
228 theSystem->GetParticipant( i )->SetDefinition( pd0 );
229 theSystem->GetParticipant( i )->SetPosition( r0 );
230 theSystem->GetParticipant( i )->SetMomentum( p0 );
231
232 for ( G4int i0i = 0 ; i0i < i0 ; i0i++ )
233 {
234 //081118
235 //std::cout << "Decay Blocked deleteing " << i0i+n0 << std::endl;
236 theSystem->DeleteParticipant( i0i+n0 );
237 }
238 //081103
239 theMeanField->Update();
240 }
241
242 }
243
244 } //shortlive
245 } // go next participant
246//071101
247
248
249 n = theSystem->GetTotalNumberOfParticipant();
250
251//081118
252 //for ( G4int i = 1 ; i < n ; i++ )
253 for ( G4int i = 1 ; i < theSystem->GetTotalNumberOfParticipant() ; i++ )
254 {
255
256 //std::cout << "Collision i " << i << std::endl;
257 if ( theSystem->GetParticipant( i )->IsThisHit() ) continue;
258
259 G4ThreeVector ri = theSystem->GetParticipant( i )->GetPosition();
260 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
261 G4double rmi = theSystem->GetParticipant( i )->GetMass();
262 G4ParticleDefinition* pdi = theSystem->GetParticipant( i )->GetDefinition();
263//090331 gamma
264 if ( pdi->GetPDGMass() == 0.0 ) continue;
265
266 //std::cout << " p4i00 " << p4i << std::endl;
267 for ( G4int j = 0 ; j < i ; j++ )
268 {
269
270
271/*
272 std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisProjectile() << std::endl;
273 std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisProjectile() << std::endl;
274 std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisTarget() << std::endl;
275 std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisTarget() << std::endl;
276*/
277
278 // Only 1 Collision allowed for each particle in a time step.
279 //081119
280 if ( theSystem->GetParticipant( i )->IsThisHit() ) continue;
281 if ( theSystem->GetParticipant( j )->IsThisHit() ) continue;
282
283 //std::cout << "Collision " << i << " " << j << std::endl;
284
285 // Do not allow collision between nucleons in target/projectile til its first collision.
286 if ( theSystem->GetParticipant( i )->IsThisProjectile() )
287 {
288 if ( theSystem->GetParticipant( j )->IsThisProjectile() ) continue;
289 }
290 else if ( theSystem->GetParticipant( i )->IsThisTarget() )
291 {
292 if ( theSystem->GetParticipant( j )->IsThisTarget() ) continue;
293 }
294
295
296 G4ThreeVector rj = theSystem->GetParticipant( j )->GetPosition();
297 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
298 G4double rmj = theSystem->GetParticipant( j )->GetMass();
299 G4ParticleDefinition* pdj = theSystem->GetParticipant( j )->GetDefinition();
300//090331 gamma
301 if ( pdj->GetPDGMass() == 0.0 ) continue;
302
303 G4double rr2 = theMeanField->GetRR2( i , j );
304
305// Here we assume elab (beam momentum less than 5 GeV/n )
306 if ( rr2 > deltar*deltar ) continue;
307
308 G4double s = (p4i+p4j)*(p4i+p4j);
309
310 G4double srt = std::sqrt ( s );
311
312 G4double cutoff = 0.0;
313 G4double bcmax = 0.0;
314 G4double sig = 0.0;
315
316 if ( rmi < 0.94 && rmj < 0.94 )
317 {
318// nucleon or pion case
319 cutoff = rmi + rmj + 0.02;
320 bcmax = bcmax0;
321 sig = sig0;
322 }
323 else
324 {
325 cutoff = rmi + rmj;
326 bcmax = bcmax1;
327 sig = sig1;
328 }
329
330 //std::cout << "Collision cutoff " << i << " " << j << " " << cutoff << std::endl;
331 if ( srt < cutoff ) continue;
332
333 G4ThreeVector dr = ri - rj;
334 G4double rsq = dr*dr;
335
336 G4double pij = p4i*p4j;
337 G4double pidr = p4i.vect()*dr;
338 G4double pjdr = p4j.vect()*dr;
339
340 G4double aij = 1.0 - ( rmi*rmj /pij ) * ( rmi*rmj /pij );
341 G4double bij = pidr / rmi - pjdr*rmi/pij;
342 G4double cij = rsq + ( pidr / rmi ) * ( pidr / rmi );
343 G4double brel = std::sqrt ( std::abs ( cij - bij*bij/aij ) );
344
345 if ( brel > bcmax ) continue;
346 //std::cout << "collisions3 " << std::endl;
347
348 G4double bji = -pjdr/rmj + pidr * rmj /pij;
349
350 G4double ti = ( pidr/rmi - bij / aij ) * p4i.e() / rmi;
351 G4double tj = (-pjdr/rmj - bji / aij ) * p4j.e() / rmj;
352
353
354/*
355 std::cout << "collisions4 p4i " << p4i << std::endl;
356 std::cout << "collisions4 ri " << ri << std::endl;
357 std::cout << "collisions4 p4j " << p4j << std::endl;
358 std::cout << "collisions4 rj " << rj << std::endl;
359 std::cout << "collisions4 dr " << dr << std::endl;
360 std::cout << "collisions4 pij " << pij << std::endl;
361 std::cout << "collisions4 aij " << aij << std::endl;
362 std::cout << "collisions4 bij bji " << bij << " " << bji << std::endl;
363 std::cout << "collisions4 pidr pjdr " << pidr << " " << pjdr << std::endl;
364 std::cout << "collisions4 p4i.e() p4j.e() " << p4i.e() << " " << p4j.e() << std::endl;
365 std::cout << "collisions4 rmi rmj " << rmi << " " << rmj << std::endl;
366 std::cout << "collisions4 " << ti << " " << tj << std::endl;
367*/
368 if ( std::abs ( ti + tj ) > deltaT ) continue;
369 //std::cout << "collisions4 " << std::endl;
370
371 G4ThreeVector beta = ( p4i + p4j ).boostVector();
372
373 G4LorentzVector p = p4i;
374 G4LorentzVector p4icm = p.boost( p.findBoostToCM ( p4j ) );
375 G4ThreeVector pcm = p4icm.vect();
376
377 G4double prcm = pcm.mag();
378
379 if ( prcm <= 0.00001 ) continue;
380 //std::cout << "collisions5 " << std::endl;
381
382 G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollision ( i , j ) ); // Use Geant4 Collision Library
383 //G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollisionJQMD ( sig , cutoff , pcm , prcm , srt, beta , gamma , i , j ) ); // JQMD Elastic
384
385/*
386 G4bool pauli_blocked = false;
387 if ( energetically_forbidden == false ) // result true
388 {
389 if ( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true )
390 {
391 pauli_blocked = true;
392 //std::cout << "G4QMDRESULT Collsion Pauli Blocked " << std::endl;
393 }
394 }
395 else
396 {
397 if ( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true )
398 pauli_blocked = false;
399 //std::cout << "G4QMDRESULT Collsion Blocked " << std::endl;
400 }
401*/
402
403/*
404 std::cout << "G4QMDRESULT Collsion initial p4 i and j "
405 << p4i << " " << p4j
406 << std::endl;
407*/
408// 081118
409 //if ( energetically_forbidden == true || pauli_blocked == true )
410 if ( energetically_forbidden == true )
411 {
412
413 //G4cout << " energetically_forbidden " << G4endl;
414// Collsion not allowed then re enter orginal participants
415// Now only momentum, becasuse we only consider elastic scattering of nucleons
416
417 theSystem->GetParticipant( i )->SetMomentum( p4i.vect() );
418 theSystem->GetParticipant( i )->SetDefinition( pdi );
419 theSystem->GetParticipant( i )->SetPosition( ri );
420
421 theSystem->GetParticipant( j )->SetMomentum( p4j.vect() );
422 theSystem->GetParticipant( j )->SetDefinition( pdj );
423 theSystem->GetParticipant( j )->SetPosition( rj );
424
425 theMeanField->Cal2BodyQuantities( i );
426 theMeanField->Cal2BodyQuantities( j );
427
428 }
429 else
430 {
431
432
433 G4bool absorption = false;
434 if ( n == theSystem->GetTotalNumberOfParticipant()+1 ) absorption = true;
435 if ( absorption )
436 {
437 //G4cout << "Absorption happend " << G4endl;
438 i = i-1;
439 n = n-1;
440 }
441
442// Collsion allowed (really happened)
443
444 // Unset Projectile/Target flag
445 theSystem->GetParticipant( i )->UnsetInitialMark();
446 if ( !absorption ) theSystem->GetParticipant( j )->UnsetInitialMark();
447
448 theSystem->GetParticipant( i )->SetHitMark();
449 if ( !absorption ) theSystem->GetParticipant( j )->SetHitMark();
450
451 theSystem->IncrementCollisionCounter();
452
453/*
454 std::cout << "G4QMDRESULT Collsion Really Happened between "
455 << i << " and " << j
456 << std::endl;
457 std::cout << "G4QMDRESULT Collsion initial p4 i and j "
458 << p4i << " " << p4j
459 << std::endl;
460 std::cout << "G4QMDRESULT Collsion after p4 i and j "
461 << theSystem->GetParticipant( i )->Get4Momentum()
462 << " "
463 << theSystem->GetParticipant( j )->Get4Momentum()
464 << std::endl;
465 std::cout << "G4QMDRESULT Collsion Diff "
466 << p4i + p4j - theSystem->GetParticipant( i )->Get4Momentum() - theSystem->GetParticipant( j )->Get4Momentum()
467 << std::endl;
468 std::cout << "G4QMDRESULT Collsion initial r i and j "
469 << ri << " " << rj
470 << std::endl;
471 std::cout << "G4QMDRESULT Collsion after r i and j "
472 << theSystem->GetParticipant( i )->GetPosition()
473 << " "
474 << theSystem->GetParticipant( j )->GetPosition()
475 << std::endl;
476*/
477
478
479 }
480
481 }
482
483 }
484
485
486}
487
488
489
490G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollision( G4int i , G4int j )
491{
492
493//081103
494 //G4cout << "CalFinalStateOfTheBinaryCollision " << i << " " << j << " " << theSystem->GetTotalNumberOfParticipant() << G4endl;
495
496 G4bool result = false;
497 G4bool energyOK = false;
498 G4bool pauliOK = false;
499 G4bool abs = false;
500 G4QMDParticipant* absorbed = NULL;
501
502 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
503 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
504
505//071031
506
507 G4double epot = theMeanField->GetTotalPotential();
508
509 G4double eini = epot + p4i.e() + p4j.e();
510
511//071031
512 // will use KineticTrack
513 G4ParticleDefinition* pdi0 =theSystem->GetParticipant( i )->GetDefinition();
514 G4ParticleDefinition* pdj0 =theSystem->GetParticipant( j )->GetDefinition();
515 G4LorentzVector p4i0 = p4i*GeV;
516 G4LorentzVector p4j0 = p4j*GeV;
517 G4ThreeVector ri0 = ( theSystem->GetParticipant( i )->GetPosition() )*fermi;
518 G4ThreeVector rj0 = ( theSystem->GetParticipant( j )->GetPosition() )*fermi;
519
520 for ( G4int iitry = 0 ; iitry < 4 ; iitry++ )
521 {
522
523 abs = false;
524
525 G4KineticTrack kt1( pdi0 , 0.0 , ri0 , p4i0 );
526 G4KineticTrack kt2( pdj0 , 0.0 , rj0 , p4j0 );
527
528 G4LorentzVector p4ix_new;
529 G4LorentzVector p4jx_new;
530 G4KineticTrackVector* secs = NULL;
531 secs = theScatterer->Scatter( kt1 , kt2 );
532
533 //std::cout << "G4QMDSCATTERER BEFORE " << kt1.GetDefinition()->GetParticleName() << " " << kt1.Get4Momentum()/GeV << " " << kt1.GetPosition()/fermi << std::endl;
534 //std::cout << "G4QMDSCATTERER BEFORE " << kt2.GetDefinition()->GetParticleName() << " " << kt2.Get4Momentum()/GeV << " " << kt2.GetPosition()/fermi << std::endl;
535 //std::cout << "THESCATTERER " << theScatterer->GetCrossSection ( kt1 , kt2 )/millibarn << " " << elastic << " " << sig << std::endl;
536
537
538 if ( secs )
539 {
540 G4int iti = 0;
541 if ( secs->size() == 2 )
542 {
543 for ( G4KineticTrackVector::iterator it
544 = secs->begin() ; it != secs->end() ; it++ )
545 {
546 if ( iti == 0 )
547 {
548 theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() );
549 p4ix_new = (*it)->Get4Momentum()/GeV;
550 //std::cout << "THESCATTERER " << (*it)->GetDefinition()->GetParticleName() << std::endl;
551 theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() );
552 }
553 if ( iti == 1 )
554 {
555 theSystem->GetParticipant( j )->SetDefinition( (*it)->GetDefinition() );
556 p4jx_new = (*it)->Get4Momentum()/GeV;
557 //std::cout << "THESCATTERER " << p4jx_new.e()-p4jx_new.m() << std::endl;
558 theSystem->GetParticipant( j )->SetMomentum( p4jx_new.v() );
559 }
560 //std::cout << "G4QMDSCATTERER AFTER " << (*it)->GetDefinition()->GetParticleName() << " " << (*it)->Get4Momentum()/GeV << std::endl;
561 iti++;
562 }
563 }
564 else if ( secs->size() == 1 )
565 {
566//081118
567 abs = true;
568 //G4cout << "G4QMDCollision pion absrorption " << secs->front()->GetDefinition()->GetParticleName() << G4endl;
569 //secs->front()->Decay();
570 theSystem->GetParticipant( i )->SetDefinition( secs->front()->GetDefinition() );
571 p4ix_new = secs->front()->Get4Momentum()/GeV;
572 theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() );
573
574 }
575
576//081118
577 if ( secs->size() > 2 )
578 {
579
580 G4cout << "G4QMDCollision secs size > 2; " << secs->size() << G4endl;
581
582 for ( G4KineticTrackVector::iterator it
583 = secs->begin() ; it != secs->end() ; it++ )
584 {
585 G4cout << "G4QMDSCATTERER AFTER " << (*it)->GetDefinition()->GetParticleName() << " " << (*it)->Get4Momentum()/GeV << G4endl;
586 }
587
588 }
589
590 // deleteing KineticTrack
591 for ( G4KineticTrackVector::iterator it
592 = secs->begin() ; it != secs->end() ; it++ )
593 {
594 delete *it;
595 }
596
597 delete secs;
598 }
599//071031
600
601 if ( !abs )
602 {
603 theMeanField->Cal2BodyQuantities( i );
604 theMeanField->Cal2BodyQuantities( j );
605 }
606 else
607 {
608 absorbed = theSystem->EraseParticipant( j );
609 theMeanField->Update();
610 }
611
612 epot = theMeanField->GetTotalPotential();
613
614 G4double efin = epot + p4ix_new.e() + p4jx_new.e();
615
616 //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl;
617
618/*
619 std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl;
620 std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl;
621 std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl;
622*/
623
624//071031
625 if ( std::abs ( eini - efin ) < epse )
626 {
627 // Collison OK
628 //std::cout << "collisions6" << std::endl;
629 //std::cout << "collisions before " << p4i << " " << p4j << std::endl;
630 //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl;
631 //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl;
632 //std::cout << "collisions before " << ri0/fermi << " " << rj0/fermi << std::endl;
633 //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl;
634 energyOK = true;
635 break;
636 }
637 else
638 {
639 //G4cout << "Energy Not OK " << G4endl;
640 if ( abs )
641 {
642 //G4cout << "TKDB reinsert j " << G4endl;
643 theSystem->InsertParticipant( absorbed , j );
644 theMeanField->Update();
645 }
646 // do not need reinsert in no absroption case
647 }
648//071031
649 }
650
651// Energetically forbidden collision
652
653 if ( energyOK )
654 {
655 // Pauli Check
656 //G4cout << "Pauli Checking " << theSystem->GetTotalNumberOfParticipant() << G4endl;
657 if ( !abs )
658 {
659 if ( !( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true ) )
660 {
661 //G4cout << "Binary Collision Happen " << theSystem->GetTotalNumberOfParticipant() << G4endl;
662 pauliOK = true;
663 }
664 }
665 else
666 {
667 //if ( theMeanField->IsPauliBlocked ( i ) == false )
668 //090126 i-1 cause jth is erased
669 if ( theMeanField->IsPauliBlocked ( i-1 ) == false )
670 {
671 //G4cout << "Absorption Happen " << theSystem->GetTotalNumberOfParticipant() << G4endl;
672 delete absorbed;
673 pauliOK = true;
674 }
675 }
676
677
678 if ( pauliOK )
679 {
680 result = true;
681 }
682 else
683 {
684 //G4cout << "Pauli Blocked" << G4endl;
685 if ( abs )
686 {
687 //G4cout << "TKDB reinsert j pauli block" << G4endl;
688 theSystem->InsertParticipant( absorbed , j );
689 theMeanField->Update();
690 }
691 }
692 }
693
694 return result;
695
696}
697
698
699
700G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollisionJQMD( G4double sig , G4double cutoff , G4ThreeVector pcm , G4double prcm , G4double srt , G4ThreeVector beta , G4double gamma , G4int i , G4int j )
701{
702
703 //G4cout << "CalFinalStateOfTheBinaryCollisionJQMD" << G4endl;
704
705 G4bool result = true;
706
707 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
708 G4double rmi = theSystem->GetParticipant( i )->GetMass();
709 G4int zi = theSystem->GetParticipant( i )->GetChargeInUnitOfEplus();
710
711 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
712 G4double rmj = theSystem->GetParticipant( j )->GetMass();
713 G4int zj = theSystem->GetParticipant( j )->GetChargeInUnitOfEplus();
714
715 G4double pr = prcm;
716
717 G4double c2 = pcm.z()/pr;
718
719 G4double csrt = srt - cutoff;
720
721 //G4double pri = prcm;
722 //G4double prf = sqrt ( 0.25 * srt*srt -rm2 );
723
724 G4double asrt = srt - rmi - rmj;
725 G4double pra = prcm;
726
727
728
729 G4double elastic = 0.0;
730
731 if ( zi == zj )
732 {
733 if ( csrt < 0.4286 )
734 {
735 elastic = 35.0 / ( 1. + csrt * 100.0 ) + 20.0;
736 }
737 else
738 {
739 elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 )
740 * 2. / pi + 1.0 ) * 9.65 + 7.0;
741 }
742 }
743 else
744 {
745 if ( csrt < 0.4286 )
746 {
747 elastic = 28.0 / ( 1. + csrt * 100.0 ) + 27.0;
748 }
749 else
750 {
751 elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 )
752 * 2. / pi + 1.0 ) * 12.34 + 10.0;
753 }
754 }
755
756// std::cout << "Collision csrt " << i << " " << j << " " << csrt << std::endl;
757// std::cout << "Collision elstic " << i << " " << j << " " << elastic << std::endl;
758
759
760// std::cout << "Collision sig " << i << " " << j << " " << sig << std::endl;
761 if ( G4UniformRand() > elastic / sig )
762 {
763 //std::cout << "Inelastic " << std::endl;
764 //std::cout << "elastic/sig " << elastic/sig << std::endl;
765 return result;
766 }
767 else
768 {
769 //std::cout << "Elastic " << std::endl;
770 }
771// std::cout << "Collision ELSTIC " << i << " " << j << std::endl;
772
773
774 G4double as = std::pow ( 3.65 * asrt , 6 );
775 G4double a = 6.0 * as / (1.0 + as);
776 G4double ta = -2.0 * pra*pra;
777 G4double x = G4UniformRand();
778 G4double t1 = std::log( (1-x) * std::exp(2.*a*ta) + x ) / a;
779 G4double c1 = 1.0 - t1/ta;
780
781 if( std::abs(c1) > 1.0 ) c1 = 2.0 * x - 1.0;
782
783/*
784 std::cout << "Collision as " << i << " " << j << " " << as << std::endl;
785 std::cout << "Collision a " << i << " " << j << " " << a << std::endl;
786 std::cout << "Collision ta " << i << " " << j << " " << ta << std::endl;
787 std::cout << "Collision x " << i << " " << j << " " << x << std::endl;
788 std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl;
789 std::cout << "Collision c1 " << i << " " << j << " " << c1 << std::endl;
790*/
791 t1 = 2.0*pi*G4UniformRand();
792// std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl;
793 G4double t2 = 0.0;
794 if ( pcm.x() == 0.0 && pcm.y() == 0 )
795 {
796 t2 = 0.0;
797 }
798 else
799 {
800 t2 = std::atan2( pcm.y() , pcm.x() );
801 }
802// std::cout << "Collision t2 " << i << " " << j << " " << t2 << std::endl;
803
804 G4double s1 = std::sqrt ( 1.0 - c1*c1 );
805 G4double s2 = std::sqrt ( 1.0 - c2*c2 );
806
807 G4double ct1 = std::cos(t1);
808 G4double st1 = std::sin(t1);
809
810 G4double ct2 = std::cos(t2);
811 G4double st2 = std::sin(t2);
812
813 G4double ss = c2*s1*ct1 + s2*c1;
814
815 pcm.setX( pr * ( ss*ct2 - s1*st1*st2) );
816 pcm.setY( pr * ( ss*st2 + s1*st1*ct2) );
817 pcm.setZ( pr * ( c1*c2 - s1*s2*ct1) );
818
819// std::cout << "Collision pcm " << i << " " << j << " " << pcm << std::endl;
820
821 G4double epot = theMeanField->GetTotalPotential();
822
823 G4double eini = epot + p4i.e() + p4j.e();
824 G4double etwo = p4i.e() + p4j.e();
825
826/*
827 std::cout << "Collision epot " << i << " " << j << " " << epot << std::endl;
828 std::cout << "Collision eini " << i << " " << j << " " << eini << std::endl;
829 std::cout << "Collision etwo " << i << " " << j << " " << etwo << std::endl;
830*/
831
832
833 for ( G4int itry = 0 ; itry < 4 ; itry++ )
834 {
835
836 G4double eicm = std::sqrt ( rmi*rmi + pcm*pcm );
837 G4double pibeta = pcm*beta;
838
839 G4double trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + eicm );
840
841 G4ThreeVector pi_new = beta*trans + pcm;
842
843 G4double ejcm = std::sqrt ( rmj*rmj + pcm*pcm );
844 trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + ejcm );
845
846 G4ThreeVector pj_new = beta*trans - pcm;
847
848//
849// Delete old
850// Add new Particitipants
851//
852// Now only change momentum ( Beacuse we only have elastic sctter of nucleon
853// In future Definition also will be change
854//
855
856 theSystem->GetParticipant( i )->SetMomentum( pi_new );
857 theSystem->GetParticipant( j )->SetMomentum( pj_new );
858
859 G4double pi_new_e = (theSystem->GetParticipant( i )->Get4Momentum()).e();
860 G4double pj_new_e = (theSystem->GetParticipant( j )->Get4Momentum()).e();
861
862 theMeanField->Cal2BodyQuantities( i );
863 theMeanField->Cal2BodyQuantities( j );
864
865 epot = theMeanField->GetTotalPotential();
866
867 G4double efin = epot + pi_new_e + pj_new_e ;
868
869 //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl;
870/*
871 std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl;
872 std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl;
873 std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl;
874*/
875
876//071031
877 if ( std::abs ( eini - efin ) < epse )
878 {
879 // Collison OK
880 //std::cout << "collisions6" << std::endl;
881 //std::cout << "collisions before " << p4i << " " << p4j << std::endl;
882 //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl;
883 //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl;
884 //std::cout << "collisions before " << rix/fermi << " " << rjx/fermi << std::endl;
885 //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl;
886 }
887//071031
888
889 if ( std::abs ( eini - efin ) < epse ) return result; // Collison OK
890
891 G4double cona = ( eini - efin + etwo ) / gamma;
892 G4double fac2 = 1.0 / ( 4.0 * cona*cona * pr*pr ) *
893 ( ( cona*cona - ( rmi*rmi + rmj*rmj ) )*( cona*cona - ( rmi*rmi + rmj*rmj ) )
894 - 4.0 * rmi*rmi * rmj*rmj );
895
896 if ( fac2 > 0 )
897 {
898 G4double fact = std::sqrt ( fac2 );
899 pcm = fact*pcm;
900 }
901
902
903 }
904
905// Energetically forbidden collision
906 result = false;
907
908 return result;
909
910}
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