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25 //
26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France
33 //
34 #define INCLXX_IN_GEANT4_MODE 1
35
36 #include "globals.hh"
37
38 #include "G4INCLDecayAvatar.hh"
39
40 #include "G4INCLDeltaDecayChannel.hh"
41 #include "G4INCLPionResonanceDecayChannel.hh"
42 #include "G4INCLSigmaZeroDecayChannel.hh"
43 #include "G4INCLNeutralKaonDecayChannel.hh"
44 #include "G4INCLStrangeAbsorbtionChannel.hh"
45 #include "G4INCLPauliBlocking.hh"
46 #include <sstream>
47 #include <string>
48 // #include <cassert>
49
50 namespace G4INCL {
51
52 DecayAvatar::DecayAvatar(G4INCL::Particle *aParticle, G4double time, G4INCL::Nucleus *n, G4bool force)
53 : InteractionAvatar(time, n, aParticle), forced(force),
54 incidentDirection(aParticle->getMomentum())
55 {
56 setType(DecayAvatarType);
57 }
58
59 DecayAvatar::DecayAvatar(G4INCL::Particle *aParticle, G4INCL::Particle *bParticle, G4double time, G4INCL::Nucleus *n, G4bool force)
60 : InteractionAvatar(time, n, aParticle, bParticle), forced(force),
61 incidentDirection(aParticle->getMomentum())
62 {
63 setType(DecayAvatarType);
64 }
65
66 DecayAvatar::~DecayAvatar() {
67
68 }
69
70 G4INCL::IChannel* DecayAvatar::getChannel() {
71 if(!particle2){
72 if(particle1->isDelta()) {
73 INCL_DEBUG("DeltaDecayChannel chosen." << '\n');
74 return new DeltaDecayChannel(particle1, incidentDirection);
75 }
76 else if(particle1->isEta() || particle1->isOmega()) {
77 INCL_DEBUG("PionResonanceDecayChannel chosen." << '\n');
78 return new PionResonanceDecayChannel(particle1, incidentDirection);
79 }
80 else if(particle1->getType() == SigmaZero) {
81 INCL_DEBUG("SigmaZeroDecayChannel chosen." << '\n');
82 return new SigmaZeroDecayChannel(particle1, incidentDirection);
83 }
84 else if(particle1->getType() == KZero || particle1->getType() == KZeroBar) {
85 INCL_DEBUG("NeutralKaonDecayChannel chosen." << '\n');
86 return new NeutralKaonDecayChannel(particle1);
87 }
88 }
89 else if(((particle1->isAntiKaon() || particle1->isSigma()) && particle2->isNucleon()) || ((particle2->isAntiKaon() || particle2->isSigma()) && particle1->isNucleon())){
90 INCL_DEBUG("StrangeAbsorbtion." << '\n');
91 return new StrangeAbsorbtionChannel(particle1, particle2);
92 }
93 return NULL;
94 }
95
96 void DecayAvatar::preInteraction() {
97 InteractionAvatar::preInteraction();
98 }
99
100 void DecayAvatar::postInteraction(FinalState *fs) {
101 // Make sure we have at least two particles in the final state
102 // Removed because of neutral kaon decay
103
104 // assert((fs->getModifiedParticles().size() + fs->getCreatedParticles().size() - fs->getDestroyedParticles().size() >= 2) || ((*fs->getModifiedParticles().begin())->getType() == KShort || (*fs->getModifiedParticles().begin())->getType() == KLong ));
105 //assert((fs->getModifiedParticles().size() + fs->getCreatedParticles().size() - fs->getDestroyedParticles().size() >= 1));
106 if(!forced) { // Normal decay
107 // Call the postInteraction method of the parent class
108 // (provides Pauli blocking and enforces energy conservation)
109 InteractionAvatar::postInteraction(fs);
110
111 if(fs->getValidity() == PauliBlockedFS)
112 /* If the decay was Pauli-blocked, make sure the propagation model
113 * generates a new decay avatar on the next call to propagate().
114 *
115 * \bug{Note that we don't generate new decay avatars for deltas that
116 * could not satisfy energy conservation. This is in keeping with
117 * INCL4.6, but doesn't seem to make much sense to me (DM), as energy
118 * conservation can be impossible to satisfy due to weird local-energy
119 * conditions, for example, that evolve with time.}
120 */
121 fs->addModifiedParticle(particle1);
122 } else { // Forced decay
123 modified = fs->getModifiedParticles();
124 created = fs->getCreatedParticles();
125 Destroyed = fs->getDestroyedParticles();
126 modifiedAndCreated = modified;
127 modifiedAndCreated.insert(modifiedAndCreated.end(), created.begin(), created.end());
128 ModifiedAndDestroyed = modified;
129 ModifiedAndDestroyed.insert(ModifiedAndDestroyed.end(), Destroyed.begin(), Destroyed.end());
130
131 std::vector<G4int> newBiasCollisionVector;
132 newBiasCollisionVector = ModifiedAndDestroyed.getParticleListBiasVector();
133 for(ParticleIter i=modifiedAndCreated.begin(), e=modifiedAndCreated.end(); i!=e; ++i ) {
134 (*i)->setBiasCollisionVector(newBiasCollisionVector);
135 }
136 // Try to enforce energy conservation
137 fs->setTotalEnergyBeforeInteraction(oldTotalEnergy);
138 const G4bool success = enforceEnergyConservation(fs);
139 if(!success) {
140 INCL_DEBUG("Enforcing energy conservation: failed!" << '\n');
141
142 if(theNucleus) {
143 // Restore the state of the initial particles
144 restoreParticles();
145
146 // Delete newly created particles
147 for(ParticleIter i=created.begin(), e=created.end(); i!=e; ++i )
148 delete *i;
149
150 fs->reset();
151 fs->makeNoEnergyConservation();
152 fs->setTotalEnergyBeforeInteraction(0.0);
153
154 return; // Interaction is blocked. Return an empty final state.
155 } else {
156 // If there is no nucleus we have to continue anyway, even if energy
157 // conservation failed. We cannot afford producing unphysical
158 // remnants.
159 INCL_DEBUG("No nucleus, continuing anyway." << '\n');
160 }
161 } else {
162 INCL_DEBUG("Enforcing energy conservation: success!" << '\n');
163 }
164
165 if(theNucleus) {
166 // Test CDPP blocking
167 G4bool isCDPPBlocked = Pauli::isCDPPBlocked(created, theNucleus);
168
169 if(isCDPPBlocked) {
170 INCL_DEBUG("CDPP: Blocked!" << '\n');
171
172 // Restore the state of both particles
173 restoreParticles();
174
175 // Delete newly created particles
176 for(ParticleIter i=created.begin(), e=created.end(); i!=e; ++i )
177 delete *i;
178
179 fs->reset();
180 fs->makePauliBlocked();
181 fs->setTotalEnergyBeforeInteraction(0.0);
182
183 return; // Interaction is blocked. Return an empty final state.
184 }
185 INCL_DEBUG("CDPP: Allowed!" << '\n');
186
187 }
188 }
189 // If there is a nucleus, increment the counters
190 if(theNucleus) {
191 switch(fs->getValidity()) {
192 case PauliBlockedFS:
193 theNucleus->getStore()->getBook().incrementBlockedDecays();
194 break;
195 case NoEnergyConservationFS:
196 case ParticleBelowFermiFS:
197 case ParticleBelowZeroFS:
198 break;
199 case ValidFS:
200 theNucleus->getStore()->getBook().incrementAcceptedDecays();
201 }
202 }
203
204 return;
205 }
206
207 std::string DecayAvatar::dump() const {
208 std::stringstream ss;
209 ss << "(avatar " << theTime << " 'decay" << '\n'
210 << "(list " << '\n'
211 << particle1->dump()
212 << "))" << '\n';
213 return ss.str();
214 }
215 }
216