source: trunk/source/processes/hadronic/models/qmd/src/G4QMDCollision.cc@ 897

Last change on this file since 897 was 819, checked in by garnier, 17 years ago

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25//
26#include "G4QMDCollision.hh"
27#include "G4ParticleDefinition.hh"
28#include "G4Scatterer.hh"
29#include "Randomize.hh"
30#include "G4PionZero.hh"
31
32G4QMDCollision::G4QMDCollision()
33: deltar ( 4 )
34, bcmax0 ( 1.323142 ) // NN maximum impact parameter
35, bcmax1 ( 2.523 ) // others maximum impact parameter
36, sig0 ( 55 ) // NN cross section
37, sig1 ( 200 ) // others cross section
38, epse ( 0.0001 )
39{
40 theScatterer = new G4Scatterer();
41}
42
43
44
45G4QMDCollision::~G4QMDCollision()
46{
47 delete theScatterer;
48}
49
50
51void G4QMDCollision::CalKinematicsOfBinaryCollisions()
52{
53
54
55 G4int n = theSystem->GetTotalNumberOfParticipant();
56
57//071101
58 for ( G4int i = 0 ; i < n ; i++ )
59 {
60 //std::cout << i << " " << theSystem->GetParticipant( i )->GetDefinition()->GetParticleName() << " " << theSystem->GetParticipant( i )->GetPosition() << std::endl;
61 if ( theSystem->GetParticipant( i )->GetDefinition()->IsShortLived() )
62 {
63 G4ParticleDefinition* pd0 = theSystem->GetParticipant( i )->GetDefinition();
64 G4ThreeVector p0 = theSystem->GetParticipant( i )->GetMomentum();
65 G4ThreeVector r0 = theSystem->GetParticipant( i )->GetPosition();
66
67 G4LorentzVector p40 = theSystem->GetParticipant( i )->Get4Momentum();
68
69 G4double epot = theMeanField->GetTotalPotential();
70 G4double eini = epot + p40.e();
71
72 G4int n0 = theSystem->GetTotalNumberOfParticipant();
73 G4int i0 = 0;
74G4bool isThisEnergyOK = false;
75 for ( G4int ii = 0 ; ii < 4 ; ii++ )
76{
77
78 //G4LorentzVector p4 = theSystem->GetParticipant( i )->Get4Momentum();
79 G4LorentzVector p400 = p40;
80
81 p400 *= GeV;
82 //G4KineticTrack kt( theSystem->GetParticipant( i )->GetDefinition() , 0.0 , (theSystem->GetParticipant( i )->GetPosition())*fermi , p4 );
83 G4KineticTrack kt( pd0 , 0.0 , r0*fermi , p400 );
84// std::cout << "G4KineticTrack " << i << " " << kt.GetDefinition()->GetParticleName() << kt.GetPosition() << std::endl;
85 G4KineticTrackVector* secs = NULL;
86 secs = kt.Decay();
87 G4int id = 0;
88 G4double et = 0;
89 if ( secs )
90 {
91 for ( G4KineticTrackVector::iterator it
92 = secs->begin() ; it != secs->end() ; it++ )
93 {
94// std::cout << "G4KineticTrack"
95// << " " << (*it)->GetDefinition()->GetParticleName()
96// << " " << (*it)->Get4Momentum()
97// << " " << (*it)->GetPosition()/fermi
98// << std::endl;
99 if ( id == 0 )
100 {
101 theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() );
102 theSystem->GetParticipant( i )->SetMomentum( (*it)->Get4Momentum().v()/GeV );
103 theSystem->GetParticipant( i )->SetPosition( (*it)->GetPosition()/fermi );
104 //theMeanField->Cal2BodyQuantities( i );
105 et += (*it)->Get4Momentum().e()/GeV;
106 }
107 if ( id > 0 )
108 {
109 // Append end;
110 theSystem->SetParticipant ( new G4QMDParticipant ( (*it)->GetDefinition() , (*it)->Get4Momentum().v()/GeV , (*it)->GetPosition()/fermi ) );
111 et += (*it)->Get4Momentum().e()/GeV;
112 if ( id > 1 )
113 {
114 // std::cout << "NAGISA id >2; id= " << id << std::endl;
115 }
116 }
117 id++;
118
119 delete *it;
120 }
121 theMeanField->SetSystem ( theSystem );
122 i0 = id-1; // 0 enter to i
123 }
124
125// EnergyCheck
126
127 G4double epot = theMeanField->GetTotalPotential();
128 G4double efin = epot + et;
129 //std::cout << std::abs ( eini - efin ) - epse << std::endl;
130// std::cout << std::abs ( eini - efin ) - epse*10 << std::endl;
131//071031
132// *10 TK
133 if ( std::abs ( eini - efin ) < epse*10 )
134 {
135 // Energy OK
136// std::cout << "Decay Succeeded Energy OK" << std::endl;
137 isThisEnergyOK = true;
138 break;
139 }
140 else
141 {
142 for ( G4int i0i = 0 ; i0i < id-1 ; i0i++ )
143 {
144// std::cout << "Decay Energitically Blocked deleteing " << i0i+n0 << std::endl;
145 theSystem->DeleteParticipant( i0i+n0 );
146 }
147 }
148}
149
150// Pauli Check
151 if ( isThisEnergyOK == true )
152 {
153// if ( theMeanField->IsPauliBlocked ( i ) != true )
154 {
155 bool allOK = true;
156 for ( G4int i0i = 0 ; i0i < i0 ; i0i++ )
157 {
158 if ( theMeanField->IsPauliBlocked ( i0i+n0 ) == true )
159 {
160 allOK = false;
161 break;
162 }
163 }
164
165// if ( allOK ) std::cout << "Decay Succeeded" << std::endl;
166 if ( allOK ) continue; //Do not Pauli Blocked
167 }
168 }
169//
170
171// std::cout << "Decay Blocked" << std::endl;
172 theSystem->GetParticipant( i )->SetDefinition( pd0 );
173 theSystem->GetParticipant( i )->SetPosition( r0 );
174 theSystem->GetParticipant( i )->SetMomentum( p0 );
175
176 if ( isThisEnergyOK == true )
177 {
178 for ( G4int i0i = 0 ; i0i < i0 ; i0i++ )
179 {
180// std::cout << "Decay Blocked deleteing " << i0i+n0 << std::endl;
181 theSystem->DeleteParticipant( i0i+n0 );
182 }
183 }
184
185 }
186 }
187//071101
188
189
190 n = theSystem->GetTotalNumberOfParticipant();
191 //std::cout << "Collision n " << n << std::endl;
192
193 std::vector< G4bool > isCollided ( n , false );
194
195 for ( G4int i = 1 ; i < n ; i++ )
196 {
197
198 //std::cout << "Collision i " << i << std::endl;
199
200 G4ThreeVector ri = theSystem->GetParticipant( i )->GetPosition();
201 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
202 G4double rmi = theSystem->GetParticipant( i )->GetMass();
203 G4ParticleDefinition* pdi = theSystem->GetParticipant( i )->GetDefinition();
204
205 //std::cout << " p4i00 " << p4i << std::endl;
206 for ( G4int j = 0 ; j < i ; j++ )
207 {
208// std::cout << "Collision " << i << " " << j << std::endl;
209
210/*
211 std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisProjectile() << std::endl;
212 std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisProjectile() << std::endl;
213 std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisTarget() << std::endl;
214 std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisTarget() << std::endl;
215*/
216
217 // Only 1 Collision allowed for each particle in a time step.
218 if ( isCollided[ i ] == true ) continue;
219 if ( isCollided[ j ] == true ) continue;
220
221 // Do not allow collision between nucleons in target/projectile til its first collision.
222 if ( theSystem->GetParticipant( i )->IsThisProjectile() )
223 {
224 if ( theSystem->GetParticipant( j )->IsThisProjectile() ) continue;
225 }
226 else if ( theSystem->GetParticipant( i )->IsThisTarget() )
227 {
228 if ( theSystem->GetParticipant( j )->IsThisTarget() ) continue;
229 }
230
231
232 G4ThreeVector rj = theSystem->GetParticipant( j )->GetPosition();
233 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
234 G4double rmj = theSystem->GetParticipant( j )->GetMass();
235 G4ParticleDefinition* pdj = theSystem->GetParticipant( j )->GetDefinition();
236
237 G4double rr2 = theMeanField->GetRR2( i , j );
238
239// Here we assume elab (beam momentum less than 5 GeV/n )
240 if ( rr2 > deltar*deltar ) continue;
241
242 G4double s = (p4i+p4j)*(p4i+p4j);
243
244 G4double srt = std::sqrt ( s );
245
246 G4double cutoff = 0.0;
247 G4double bcmax = 0.0;
248 G4double sig = 0.0;
249
250 if ( rmi < 0.94 && rmj < 0.94 )
251 {
252// nucleon or pion case
253 cutoff = rmi + rmj + 0.02;
254 bcmax = bcmax0;
255 sig = sig0;
256 }
257 else
258 {
259 cutoff = rmi + rmj;
260 bcmax = bcmax1;
261 sig = sig1;
262 }
263
264 //std::cout << "Collision cutoff " << i << " " << j << " " << cutoff << std::endl;
265 if ( srt < cutoff ) continue;
266
267 G4ThreeVector dr = ri - rj;
268 G4double rsq = dr*dr;
269
270 G4double pij = p4i*p4j;
271 G4double pidr = p4i.vect()*dr;
272 G4double pjdr = p4j.vect()*dr;
273
274 G4double aij = 1.0 - ( rmi*rmj /pij ) * ( rmi*rmj /pij );
275 G4double bij = pidr / rmi - pjdr*rmi/pij;
276 G4double cij = rsq + ( pidr / rmi ) * ( pidr / rmi );
277 G4double brel = std::sqrt ( std::abs ( cij - bij*bij/aij ) );
278
279 if ( brel > bcmax ) continue;
280 //std::cout << "collisions3 " << std::endl;
281
282 G4double bji = -pjdr/rmj + pidr * rmj /pij;
283
284 G4double ti = ( pidr/rmi - bij / aij ) * p4i.e() / rmi;
285 G4double tj = (-pjdr/rmj - bji / aij ) * p4j.e() / rmj;
286
287 G4double deltaT = 0.0;
288 deltaT = 1.0; // TK
289
290/*
291 std::cout << "collisions4 p4i " << p4i << std::endl;
292 std::cout << "collisions4 ri " << ri << std::endl;
293 std::cout << "collisions4 p4j " << p4j << std::endl;
294 std::cout << "collisions4 rj " << rj << std::endl;
295 std::cout << "collisions4 dr " << dr << std::endl;
296 std::cout << "collisions4 pij " << pij << std::endl;
297 std::cout << "collisions4 aij " << aij << std::endl;
298 std::cout << "collisions4 bij bji " << bij << " " << bji << std::endl;
299 std::cout << "collisions4 pidr pjdr " << pidr << " " << pjdr << std::endl;
300 std::cout << "collisions4 p4i.e() p4j.e() " << p4i.e() << " " << p4j.e() << std::endl;
301 std::cout << "collisions4 rmi rmj " << rmi << " " << rmj << std::endl;
302 std::cout << "collisions4 " << ti << " " << tj << std::endl;
303*/
304 if ( std::abs ( ti + tj ) > deltaT ) continue;
305 //std::cout << "collisions4 " << std::endl;
306
307 G4ThreeVector beta = ( p4i + p4j ).boostVector();
308
309 G4LorentzVector p = p4i;
310 G4LorentzVector p4icm = p.boost( p.findBoostToCM ( p4j ) );
311 G4ThreeVector pcm = p4icm.vect();
312
313 G4double prcm = pcm.mag();
314
315 if ( prcm <= 0.00001 ) continue;
316 //std::cout << "collisions5 " << std::endl;
317
318 G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollision ( i , j ) ); // Use Geant4 Collision Library
319 //G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollisionJQMD ( sig , cutoff , pcm , prcm , srt, beta , gamma , i , j ) ); // JQMD Elastic
320
321 G4bool pauli_blocked = false;
322 if ( energetically_forbidden != true )
323 {
324 if ( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true )
325 {
326 pauli_blocked = true;
327 //std::cout << "G4QMDRESULT Collsion Pauli Blocked " << std::endl;
328 }
329 }
330 else
331 {
332 //std::cout << "G4QMDRESULT Collsion Blocked " << std::endl;
333 }
334
335/*
336 std::cout << "G4QMDRESULT Collsion initial p4 i and j "
337 << p4i << " " << p4j
338 << std::endl;
339*/
340
341
342 if ( energetically_forbidden == true || pauli_blocked == true )
343 {
344// Collsion not allowed then re enter orginal participants
345// Now only momentum, becasuse we only consider elastic scattering of nucleons
346
347 theSystem->GetParticipant( i )->SetMomentum( p4i.vect() );
348 theSystem->GetParticipant( i )->SetDefinition( pdi );
349 theSystem->GetParticipant( i )->SetPosition( ri );
350 theSystem->GetParticipant( j )->SetMomentum( p4j.vect() );
351 theSystem->GetParticipant( j )->SetDefinition( pdj );
352 theSystem->GetParticipant( j )->SetPosition( rj );
353
354 }
355 else
356 {
357// Collsion allowed (really happened)
358
359 // Unset Projectile/Target flag
360 theSystem->GetParticipant( i )->UnsetInitialMark();
361 theSystem->GetParticipant( j )->UnsetInitialMark();
362
363 isCollided[ i ] = true;
364 isCollided[ j ] = true;
365
366 theSystem->IncrementCollisionCounter();
367
368/*
369 std::cout << "G4QMDRESULT Collsion Really Happened between "
370 << i << " and " << j
371 << std::endl;
372 std::cout << "G4QMDRESULT Collsion initial p4 i and j "
373 << p4i << " " << p4j
374 << std::endl;
375 std::cout << "G4QMDRESULT Collsion after p4 i and j "
376 << theSystem->GetParticipant( i )->Get4Momentum()
377 << " "
378 << theSystem->GetParticipant( j )->Get4Momentum()
379 << std::endl;
380 std::cout << "G4QMDRESULT Collsion Diff "
381 << p4i + p4j - theSystem->GetParticipant( i )->Get4Momentum() - theSystem->GetParticipant( j )->Get4Momentum()
382 << std::endl;
383 std::cout << "G4QMDRESULT Collsion initial r i and j "
384 << ri << " " << rj
385 << std::endl;
386 std::cout << "G4QMDRESULT Collsion after r i and j "
387 << theSystem->GetParticipant( i )->GetPosition()
388 << " "
389 << theSystem->GetParticipant( j )->GetPosition()
390 << std::endl;
391*/
392
393 }
394
395// theMeanField
396
397 }
398 }
399
400//071106
401 n = theSystem->GetTotalNumberOfParticipant();
402 G4bool isThisModefied = false;
403 for ( G4int i = 0 ; i < n ; i++ )
404 {
405 if ( theSystem->GetParticipant( i )->GetDefinition() == G4PionZero::PionZero() )
406 {
407 if ( theSystem->GetParticipant( i )->GetPosition().mag() > 1.0e9 )
408 {
409// std::cout << "Deleting " << i << " " << theSystem->GetParticipant( i )->GetPosition().mag() << std::endl;
410 theSystem->DeleteParticipant( i );
411 isThisModefied = true;
412 }
413 }
414 }
415 if ( isThisModefied == true ) theMeanField->SetSystem ( theSystem );
416//071106
417
418}
419
420
421
422G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollision( G4int i , G4int j )
423{
424
425 //G4cout << "CalFinalStateOfTheBinaryCollision " << G4endl;
426
427 G4bool result = true;
428
429 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
430 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
431
432//071031
433 // will use KineticTrack
434 G4LorentzVector p4ix = p4i*GeV;
435 G4LorentzVector p4jx = p4j*GeV;
436 G4ThreeVector rix = (theSystem->GetParticipant( i )->GetPosition())*fermi;
437 G4ThreeVector rjx = (theSystem->GetParticipant( j )->GetPosition())*fermi;
438//071031
439
440 G4double epot = theMeanField->GetTotalPotential();
441
442 G4double eini = epot + p4i.e() + p4j.e();
443
444
445//071031
446 G4ParticleDefinition* pdi0 =theSystem->GetParticipant( i )->GetDefinition();
447 G4ParticleDefinition* pdj0 =theSystem->GetParticipant( j )->GetDefinition();
448 G4ThreeVector ri0 =(theSystem->GetParticipant( i )->GetPosition())*fermi;
449 G4ThreeVector rj0 =(theSystem->GetParticipant( j )->GetPosition())*fermi;
450
451 for ( G4int iitry = 0 ; iitry < 4 ; iitry++ )
452 {
453
454 G4KineticTrack kt1( pdi0 , 0.0 , ri0 , p4ix );
455 G4KineticTrack kt2( pdj0 , 0.0 , rj0 , p4jx );
456 G4LorentzVector p4ix_new;
457 G4LorentzVector p4jx_new;
458 G4KineticTrackVector* secs = NULL;
459 secs = theScatterer->Scatter( kt1 , kt2 );
460
461 //std::cout << "G4QMDSCATTERER BEFORE " << kt1.GetDefinition()->GetParticleName() << " " << kt1.Get4Momentum()/GeV << " " << kt1.GetPosition()/fermi << std::endl;
462 //std::cout << "G4QMDSCATTERER BEFORE " << kt2.GetDefinition()->GetParticleName() << " " << kt2.Get4Momentum()/GeV << " " << kt2.GetPosition()/fermi << std::endl;
463 //std::cout << "THESCATTERER " << theScatterer->GetCrossSection ( kt1 , kt2 )/millibarn << " " << elastic << " " << sig << std::endl;
464 if ( secs )
465 {
466 G4int iti = 0;
467 if ( secs->size() == 2 )
468 {
469 for ( G4KineticTrackVector::iterator it
470 = secs->begin() ; it != secs->end() ; it++ )
471 {
472 if ( iti == 0 )
473 {
474 theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() );
475 p4ix_new = (*it)->Get4Momentum()/GeV;
476 //std::cout << "THESCATTERER " << (*it)->GetDefinition()->GetParticleName() << std::endl;
477 theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() );
478 }
479 if ( iti == 1 )
480 {
481 theSystem->GetParticipant( j )->SetDefinition( (*it)->GetDefinition() );
482 p4jx_new = (*it)->Get4Momentum()/GeV;
483 //std::cout << "THESCATTERER " << p4jx_new.e()-p4jx_new.m() << std::endl;
484 theSystem->GetParticipant( j )->SetMomentum( p4jx_new.v() );
485 }
486 //std::cout << "G4QMDSCATTERER AFTER " << (*it)->GetDefinition()->GetParticleName() << " " << (*it)->Get4Momentum()/GeV << std::endl;
487 iti++;
488 }
489 }
490 else
491 {
492 //std::cout << "NAGISA pion absrorption " << secs->front()->GetDefinition()->GetParticleName() << std::endl;
493 //secs->front()->Decay();
494 theSystem->GetParticipant( i )->SetDefinition( secs->front()->GetDefinition() );
495 p4ix_new = secs->front()->Get4Momentum()/GeV;
496 theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() );
497
498 //std::cout << "THESCATTERER " << (*it)->GetDefinition()->GetParticleName() << std::endl;
499 p4jx_new( 0 );
500 //theSystem->GetParticipant( j )->SetDefinition( G4Gamma::Gamma() );
501 //theSystem->GetParticipant( j )->SetDefinition( G4Neutron::Neutron() );
502 theSystem->GetParticipant( j )->SetDefinition( G4PionZero::PionZero() );
503 theSystem->GetParticipant( j )->SetMomentum( G4ThreeVector( G4UniformRand() )*eV );
504 theSystem->GetParticipant( j )->SetPosition( G4ThreeVector( 1000, 1000, 1000 )*km );
505
506 }
507
508 if ( secs->size() > 2 ) std::cout << "NAGISA secs size > 2; " << secs->size() << std::endl;
509
510 // deleteing KineticTrack
511 for ( G4KineticTrackVector::iterator it
512 = secs->begin() ; it != secs->end() ; it++ )
513 {
514 delete *it;
515 }
516 }
517//071031
518
519 theMeanField->Cal2BodyQuantities( i );
520 theMeanField->Cal2BodyQuantities( j );
521
522 epot = theMeanField->GetTotalPotential();
523
524 G4double efin = epot + p4ix_new.e() + p4jx_new.e();
525
526 //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl;
527
528/*
529 std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl;
530 std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl;
531 std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl;
532*/
533
534//071031
535 if ( std::abs ( eini - efin ) < epse )
536 {
537 // Collison OK
538 //std::cout << "collisions6" << std::endl;
539 //std::cout << "collisions before " << p4i << " " << p4j << std::endl;
540 //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl;
541 //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl;
542 //std::cout << "collisions before " << rix/fermi << " " << rjx/fermi << std::endl;
543 //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl;
544 }
545//071031
546
547 if ( std::abs ( eini - efin ) < epse ) return result; // Collison OK
548
549 }
550
551// Energetically forbidden collision
552 result = false;
553
554 return result;
555
556}
557
558
559
560G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollisionJQMD( G4double sig , G4double cutoff , G4ThreeVector pcm , G4double prcm , G4double srt , G4ThreeVector beta , G4double gamma , G4int i , G4int j )
561{
562
563 //G4cout << "CalFinalStateOfTheBinaryCollisionJQMD" << G4endl;
564
565 G4bool result = true;
566
567 G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum();
568 G4double rmi = theSystem->GetParticipant( i )->GetMass();
569 G4int zi = theSystem->GetParticipant( i )->GetChargeInUnitOfEplus();
570
571 G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum();
572 G4double rmj = theSystem->GetParticipant( j )->GetMass();
573 G4int zj = theSystem->GetParticipant( j )->GetChargeInUnitOfEplus();
574
575 G4double pr = prcm;
576
577 G4double c2 = pcm.z()/pr;
578
579 G4double csrt = srt - cutoff;
580
581 //G4double pri = prcm;
582 //G4double prf = sqrt ( 0.25 * srt*srt -rm2 );
583
584 G4double asrt = srt - rmi - rmj;
585 G4double pra = prcm;
586
587
588
589 G4double elastic = 0.0;
590
591 if ( zi == zj )
592 {
593 if ( csrt < 0.4286 )
594 {
595 elastic = 35.0 / ( 1. + csrt * 100.0 ) + 20.0;
596 }
597 else
598 {
599 elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 )
600 * 2. / pi + 1.0 ) * 9.65 + 7.0;
601 }
602 }
603 else
604 {
605 if ( csrt < 0.4286 )
606 {
607 elastic = 28.0 / ( 1. + csrt * 100.0 ) + 27.0;
608 }
609 else
610 {
611 elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 )
612 * 2. / pi + 1.0 ) * 12.34 + 10.0;
613 }
614 }
615
616// std::cout << "Collision csrt " << i << " " << j << " " << csrt << std::endl;
617// std::cout << "Collision elstic " << i << " " << j << " " << elastic << std::endl;
618
619
620// std::cout << "Collision sig " << i << " " << j << " " << sig << std::endl;
621 if ( G4UniformRand() > elastic / sig )
622 {
623 //std::cout << "Inelastic " << std::endl;
624 //std::cout << "elastic/sig " << elastic/sig << std::endl;
625 return result;
626 }
627 else
628 {
629 //std::cout << "Elastic " << std::endl;
630 }
631// std::cout << "Collision ELSTIC " << i << " " << j << std::endl;
632
633
634 G4double as = std::pow ( 3.65 * asrt , 6 );
635 G4double a = 6.0 * as / (1.0 + as);
636 G4double ta = -2.0 * pra*pra;
637 G4double x = G4UniformRand();
638 G4double t1 = std::log( (1-x) * std::exp(2.*a*ta) + x ) / a;
639 G4double c1 = 1.0 - t1/ta;
640
641 if( std::abs(c1) > 1.0 ) c1 = 2.0 * x - 1.0;
642
643/*
644 std::cout << "Collision as " << i << " " << j << " " << as << std::endl;
645 std::cout << "Collision a " << i << " " << j << " " << a << std::endl;
646 std::cout << "Collision ta " << i << " " << j << " " << ta << std::endl;
647 std::cout << "Collision x " << i << " " << j << " " << x << std::endl;
648 std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl;
649 std::cout << "Collision c1 " << i << " " << j << " " << c1 << std::endl;
650*/
651 t1 = 2.0*pi*G4UniformRand();
652// std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl;
653 G4double t2 = 0.0;
654 if ( pcm.x() == 0.0 && pcm.y() == 0 )
655 {
656 t2 = 0.0;
657 }
658 else
659 {
660 t2 = std::atan2( pcm.y() , pcm.x() );
661 }
662// std::cout << "Collision t2 " << i << " " << j << " " << t2 << std::endl;
663
664 G4double s1 = std::sqrt ( 1.0 - c1*c1 );
665 G4double s2 = std::sqrt ( 1.0 - c2*c2 );
666
667 G4double ct1 = std::cos(t1);
668 G4double st1 = std::sin(t1);
669
670 G4double ct2 = std::cos(t2);
671 G4double st2 = std::sin(t2);
672
673 G4double ss = c2*s1*ct1 + s2*c1;
674
675 pcm.setX( pr * ( ss*ct2 - s1*st1*st2) );
676 pcm.setY( pr * ( ss*st2 + s1*st1*ct2) );
677 pcm.setZ( pr * ( c1*c2 - s1*s2*ct1) );
678
679// std::cout << "Collision pcm " << i << " " << j << " " << pcm << std::endl;
680
681 G4double epot = theMeanField->GetTotalPotential();
682
683 G4double eini = epot + p4i.e() + p4j.e();
684 G4double etwo = p4i.e() + p4j.e();
685
686/*
687 std::cout << "Collision epot " << i << " " << j << " " << epot << std::endl;
688 std::cout << "Collision eini " << i << " " << j << " " << eini << std::endl;
689 std::cout << "Collision etwo " << i << " " << j << " " << etwo << std::endl;
690*/
691
692
693 for ( G4int itry = 0 ; itry < 4 ; itry++ )
694 {
695
696 G4double eicm = std::sqrt ( rmi*rmi + pcm*pcm );
697 G4double pibeta = pcm*beta;
698
699 G4double trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + eicm );
700
701 G4ThreeVector pi_new = beta*trans + pcm;
702
703 G4double ejcm = std::sqrt ( rmj*rmj + pcm*pcm );
704 trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + ejcm );
705
706 G4ThreeVector pj_new = beta*trans - pcm;
707
708//
709// Delete old
710// Add new Particitipants
711//
712// Now only change momentum ( Beacuse we only have elastic sctter of nucleon
713// In future Definition also will be change
714//
715
716 theSystem->GetParticipant( i )->SetMomentum( pi_new );
717 theSystem->GetParticipant( j )->SetMomentum( pj_new );
718
719 G4double pi_new_e = (theSystem->GetParticipant( i )->Get4Momentum()).e();
720 G4double pj_new_e = (theSystem->GetParticipant( j )->Get4Momentum()).e();
721
722 theMeanField->Cal2BodyQuantities( i );
723 theMeanField->Cal2BodyQuantities( j );
724
725 epot = theMeanField->GetTotalPotential();
726
727 G4double efin = epot + pi_new_e + pj_new_e ;
728
729 //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl;
730/*
731 std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl;
732 std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl;
733 std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl;
734*/
735
736//071031
737 if ( std::abs ( eini - efin ) < epse )
738 {
739 // Collison OK
740 //std::cout << "collisions6" << std::endl;
741 //std::cout << "collisions before " << p4i << " " << p4j << std::endl;
742 //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl;
743 //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl;
744 //std::cout << "collisions before " << rix/fermi << " " << rjx/fermi << std::endl;
745 //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl;
746 }
747//071031
748
749 if ( std::abs ( eini - efin ) < epse ) return result; // Collison OK
750
751 G4double cona = ( eini - efin + etwo ) / gamma;
752 G4double fac2 = 1.0 / ( 4.0 * cona*cona * pr*pr ) *
753 ( ( cona*cona - ( rmi*rmi + rmj*rmj ) )*( cona*cona - ( rmi*rmi + rmj*rmj ) )
754 - 4.0 * rmi*rmi * rmj*rmj );
755
756 if ( fac2 > 0 )
757 {
758 G4double fact = std::sqrt ( fac2 );
759 pcm = fact*pcm;
760 }
761
762
763 }
764
765// Energetically forbidden collision
766 result = false;
767
768 return result;
769
770}
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