source: trunk/source/processes/hadronic/models/de_excitation/evaporation/src/G4Evaporation.cc @ 1245

Last change on this file since 1245 was 1228, checked in by garnier, 15 years ago

update geant4.9.3 tag
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27// $Id: G4Evaporation.cc,v 1.15 2009/09/16 15:32:25 vnivanch Exp $
28// GEANT4 tag $Name: geant4-09-03 $
29//
30// Hadronic Process: Nuclear De-excitations
31// by V. Lara (Oct 1998)
32//
33// Alex Howard - added protection for negative probabilities in the sum, 14/2/07
34//
35// Modif (03 September 2008) by J. M. Quesada for external choice of inverse
36// cross section option
37// JMQ (06 September 2008) Also external choices have been added for
38// superimposed Coulomb barrier (if useSICBis set true, by default is false)
39//
40// V.Ivanchenko added G4EvaporationDefaultGEMFactory option, 27/07/09
41
42#include "G4Evaporation.hh"
43#include "G4EvaporationFactory.hh"
44#include "G4EvaporationGEMFactory.hh"
45#include "G4EvaporationDefaultGEMFactory.hh"
46#include "G4HadronicException.hh"
47#include <numeric>
48
49G4Evaporation::G4Evaporation() 
50{
51  theChannelFactory = new G4EvaporationFactory();
52  //theChannelFactory = new G4EvaporationDefaultGEMFactory();
53  theChannels = theChannelFactory->GetChannel();
54}
55
56G4Evaporation::~G4Evaporation()
57{
58  if (theChannels != 0) theChannels = 0;
59  if (theChannelFactory != 0) delete theChannelFactory;
60}
61
62void G4Evaporation::SetDefaultChannel()
63{
64  if (theChannelFactory != 0) delete theChannelFactory;
65  theChannelFactory = new G4EvaporationFactory();
66  theChannels = theChannelFactory->GetChannel();
67}
68
69void G4Evaporation::SetGEMChannel()
70{
71  if (theChannelFactory != 0) delete theChannelFactory;
72  theChannelFactory = new G4EvaporationGEMFactory();
73  theChannels = theChannelFactory->GetChannel();
74}
75
76void G4Evaporation::SetCombinedChannel()
77{
78  if (theChannelFactory != 0) delete theChannelFactory;
79  theChannelFactory = new G4EvaporationDefaultGEMFactory();
80  theChannels = theChannelFactory->GetChannel();
81}
82
83
84G4FragmentVector * G4Evaporation::BreakItUp(const G4Fragment &theNucleus)
85{
86    G4FragmentVector * theResult = new G4FragmentVector;
87
88    // CHECK that Excitation Energy != 0
89    if (theNucleus.GetExcitationEnergy() <= 0.0) {
90        theResult->push_back(new G4Fragment(theNucleus));
91        return theResult;
92    }
93
94    // The residual nucleus (after evaporation of each fragment)
95    G4Fragment theResidualNucleus = theNucleus;
96
97    // Number of channels
98    G4int TotNumberOfChannels = theChannels->size(); 
99
100    // Starts loop over evaporated particles
101    for (;;) 
102 
103   {   
104        // loop over evaporation channels
105        std::vector<G4VEvaporationChannel*>::iterator i;
106        for (i=theChannels->begin(); i != theChannels->end(); i++) 
107          {
108  // for inverse cross section choice
109            (*i)->SetOPTxs(OPTxs);
110  // for superimposed Coulomb Barrier for inverse cross sections
111            (*i)->UseSICB(useSICB);
112
113            (*i)->Initialize(theResidualNucleus);
114          }
115        // Can't use this form beacuse Initialize is a non const member function
116        //      for_each(theChannels->begin(),theChannels->end(),
117        //               bind2nd(mem_fun(&G4VEvaporationChannel::Initialize),theResidualNucleus));
118        // Work out total decay probability by summing over channels
119        G4double TotalProbability =  std::accumulate(theChannels->begin(),
120                                                       theChannels->end(),
121                                                       0.0,SumProbabilities());
122       
123        if (TotalProbability <= 0.0) 
124          {
125            // Will be no evaporation more
126            // write information about residual nucleus
127            theResult->push_back(new G4Fragment(theResidualNucleus));
128            break; 
129          } 
130        else 
131          {
132            // Selection of evaporation channel, fission or gamma
133            // G4double * EmissionProbChannel = new G4double(TotNumberOfChannels);
134            std::vector<G4double> EmissionProbChannel;
135            EmissionProbChannel.reserve(theChannels->size());
136           
137
138            // EmissionProbChannel[0] = theChannels->at(0)->GetEmissionProbability();
139
140
141            G4double first = theChannels->front()->GetEmissionProbability();
142
143            EmissionProbChannel.push_back(first >0 ? first : 0); // index 0
144
145
146            //      EmissionProbChannel.push_back(theChannels->front()->GetEmissionProbability()); // index 0
147           
148            for (i= (theChannels->begin()+1); i != theChannels->end(); i++) 
149              {
150                // EmissionProbChannel[i] = EmissionProbChannel[i-1] +
151                // theChannels->at(i)->GetEmissionProbability();
152                //              EmissionProbChannel.push_back(EmissionProbChannel.back() + (*i)->GetEmissionProbability());
153                first = (*i)->GetEmissionProbability();
154                EmissionProbChannel.push_back(first> 0? EmissionProbChannel.back() + first : EmissionProbChannel.back());
155              }
156
157            G4double shoot = G4UniformRand() * TotalProbability;
158            G4int j;
159            for (j=0; j < TotNumberOfChannels; j++) 
160              {
161                // if (shoot < EmissionProbChannel[i])
162                if (shoot < EmissionProbChannel[j]) 
163                  break;
164              }
165           
166            // delete [] EmissionProbChannel;
167            EmissionProbChannel.clear();
168                       
169            if( j >= TotNumberOfChannels ) 
170              {
171                G4cerr << " Residual A: " << theResidualNucleus.GetA() << " Residual Z: " << theResidualNucleus.GetZ() << " Excitation Energy: " << theResidualNucleus.GetExcitationEnergy() << G4endl;
172                G4cerr << " j has not chosen a channel, j = " << j << " TotNumberOfChannels " << TotNumberOfChannels << " Total Probability: " << TotalProbability << G4endl;
173                for (j=0; j < TotNumberOfChannels; j++) 
174                  {
175                    G4cerr << " j: " << j << " EmissionProbChannel: " << EmissionProbChannel[j] << " and shoot: " << shoot << " (<ProbChannel?) " << G4endl;
176                  }             
177                throw G4HadronicException(__FILE__, __LINE__,  "G4Evaporation::BreakItUp: Can't define emission probability of the channels!" );
178              } 
179            else 
180              {
181                // Perform break-up
182                G4FragmentVector * theEvaporationResult = (*theChannels)[j]->BreakUp(theResidualNucleus);
183
184#ifdef debug
185                G4cout <<           "-----------------------------------------------------------\n"; 
186                G4cout << G4endl << " After the evaporation of a particle, testing conservation \n";
187                CheckConservation(theResidualNucleus,theEvaporationResult);
188                G4cout << G4endl
189                       <<           "------------------------------------------------------------\n"; 
190#endif 
191
192                // Check if chosen channel is fission (there are only two EXCITED fragments)
193                // or the channel could not evaporate anything
194                if ( theEvaporationResult->size() == 1 || 
195                     ((*(theEvaporationResult->begin()))->GetExcitationEnergy() > 0.0 && 
196                      (*(theEvaporationResult->end()-1))->GetExcitationEnergy() > 0.0) ) {
197                  // FISSION
198                  for (G4FragmentVector::iterator i = theEvaporationResult->begin();
199                       i != theEvaporationResult->end(); ++i) 
200                    {
201                      theResult->push_back(*(i));
202                    }
203                  delete theEvaporationResult;
204                  break;
205                } else {
206                  // EVAPORATION
207                  for (G4FragmentVector::iterator i = theEvaporationResult->begin();
208                       i != theEvaporationResult->end()-1; ++i) 
209                    {
210#ifdef PRECOMPOUND_TEST
211                      if ((*i)->GetA() == 0) (*i)->SetCreatorModel(G4String("G4PhotonEvaporation"));
212#endif
213                      theResult->push_back(*(i));
214                    }
215                  theResidualNucleus = *(theEvaporationResult->back());
216                  delete theEvaporationResult->back();
217                  delete theEvaporationResult;
218#ifdef PRECOMPOUND_TEST
219                  theResidualNucleus.SetCreatorModel(G4String("ResidualNucleus"));
220#endif
221
222                }
223              }
224          }
225      }
226   
227#ifdef debug
228    G4cout << "======== Evaporation Conservation Test ===========\n"
229           << "==================================================\n";
230    CheckConservation(theNucleus,theResult);
231    G4cout << "==================================================\n";
232#endif
233    return theResult;
234}
235
236
237
238#ifdef debug
239void G4Evaporation::CheckConservation(const G4Fragment & theInitialState,
240                                      G4FragmentVector * Result) const
241{
242    G4double ProductsEnergy =0;
243    G4ThreeVector ProductsMomentum;
244    G4int ProductsA = 0;
245    G4int ProductsZ = 0;
246    for (G4FragmentVector::iterator h = Result->begin(); h != Result->end(); h++) {
247        G4LorentzVector tmp = (*h)->GetMomentum();
248        ProductsEnergy += tmp.e();
249        ProductsMomentum += tmp.vect();
250        ProductsA += static_cast<G4int>((*h)->GetA());
251        ProductsZ += static_cast<G4int>((*h)->GetZ());
252    }
253
254    if (ProductsA != theInitialState.GetA()) {
255        G4cout << "!!!!!!!!!! Baryonic Number Conservation Violation !!!!!!!!!!" << G4endl;
256        G4cout << "G4Evaporation.cc: Barionic Number Conservation test for evaporation fragments" 
257               << G4endl; 
258        G4cout << "Initial A = " << theInitialState.GetA() 
259               << "   Fragments A = " << ProductsA << "   Diference --> " 
260               << theInitialState.GetA() - ProductsA << G4endl;
261    }
262    if (ProductsZ != theInitialState.GetZ()) {
263        G4cout << "!!!!!!!!!! Charge Conservation Violation !!!!!!!!!!" << G4endl;
264        G4cout << "G4Evaporation.cc: Charge Conservation test for evaporation fragments" 
265               << G4endl; 
266        G4cout << "Initial Z = " << theInitialState.GetZ() 
267               << "   Fragments Z = " << ProductsZ << "   Diference --> " 
268               << theInitialState.GetZ() - ProductsZ << G4endl;
269    }
270    if (std::abs(ProductsEnergy-theInitialState.GetMomentum().e()) > 1.0*keV) {
271        G4cout << "!!!!!!!!!! Energy Conservation Violation !!!!!!!!!!" << G4endl;
272        G4cout << "G4Evaporation.cc: Energy Conservation test for evaporation fragments" 
273               << G4endl; 
274        G4cout << "Initial E = " << theInitialState.GetMomentum().e()/MeV << " MeV"
275               << "   Fragments E = " << ProductsEnergy/MeV  << " MeV   Diference --> " 
276               << (theInitialState.GetMomentum().e() - ProductsEnergy)/MeV << " MeV" << G4endl;
277    } 
278    if (std::abs(ProductsMomentum.x()-theInitialState.GetMomentum().x()) > 1.0*keV || 
279        std::abs(ProductsMomentum.y()-theInitialState.GetMomentum().y()) > 1.0*keV ||
280        std::abs(ProductsMomentum.z()-theInitialState.GetMomentum().z()) > 1.0*keV) {
281        G4cout << "!!!!!!!!!! Momentum Conservation Violation !!!!!!!!!!" << G4endl;
282        G4cout << "G4Evaporation.cc: Momentum Conservation test for evaporation fragments" 
283               << G4endl; 
284        G4cout << "Initial P = " << theInitialState.GetMomentum().vect() << " MeV"
285               << "   Fragments P = " << ProductsMomentum  << " MeV   Diference --> " 
286               << theInitialState.GetMomentum().vect() - ProductsMomentum << " MeV" << G4endl;
287    }
288    return;
289}
290#endif
291
292
293
294
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