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26 ////////////////////////////////////////////// <<
27 // <<
28 // File: G4LENDInelastic.cc <<
29 // Date: 24 March 2020 <<
30 // Author: Dennis Wright <<
31 // <<
32 // Description: model for inelastic scatterin <<
33 // gammas at energies of order 2 <<
34 // This model uses GIDI particle <<
35 // in spectrum mode. In this mo <<
36 // for each possible particle ty <<
37 // given interaction. Unlike Ge <<
38 // consideration of event-by-eve <<
39 // Indeed, forcing such conserva <<
40 // introduces correlations and d <<
41 // spectra which are not present <<
42 // <<
43 // In order to use GIDI data wit <<
44 // minimal event-by-event baryon <<
45 // enforced which allows deviati <<
46 // giving warnings. Neither cha <<
47 // conservation is enforced. Un <<
48 // fragment (n, p, d, t, alpha) <<
49 // after a large number of event <<
50 // conservation also approach th <<
51 // this limit. The mass, charge <<
52 // large fragments, however, are <<
53 // data very well. This is a re <<
54 // baryon number conservation an <<
55 // fragment spectra are correct. <<
56 // <<
57 ////////////////////////////////////////////// <<
58 <<
59 #include "G4LENDInelastic.hh" 26 #include "G4LENDInelastic.hh"
60 #include "G4SystemOfUnits.hh" 27 #include "G4SystemOfUnits.hh"
61 #include "G4Nucleus.hh" 28 #include "G4Nucleus.hh"
62 #include "G4IonTable.hh" << 29 #include "G4ParticleTable.hh"
63 #include <algorithm> <<
64 #include <random> <<
65 30
66 G4HadFinalState* G4LENDInelastic::ApplyYoursel << 31 G4HadFinalState * G4LENDInelastic::ApplyYourself(const G4HadProjectile& aTrack, G4Nucleus& aTarg )
67 <<
68 { 32 {
69 G4ThreeVector projMom = aTrack.Get4Momentum( <<
70 G4double temp = aTrack.GetMaterial()->GetTem <<
71 33
72 G4int iZ = aTarg.GetZ_asInt(); << 34 G4ThreeVector proj_p = aTrack.Get4Momentum().vect();
73 G4int iA = aTarg.GetA_asInt(); << 35
74 G4int iM = 0; << 36 G4double temp = aTrack.GetMaterial()->GetTemperature();
75 if (aTarg.GetIsotope() != nullptr) iM = aTar << 37
76 << 38 //G4int iZ = int ( aTarg.GetZ() );
77 G4double ke = aTrack.GetKineticEnergy(); << 39 //G4int iA = int ( aTarg.GetN() );
78 << 40 //migrate to integer A and Z (GetN_asInt returns number of neutrons in the nucleus since this)
79 G4HadFinalState* theResult = &theParticleCha << 41 G4int iZ = aTarg.GetZ_asInt();
80 theResult->Clear(); << 42 G4int iA = aTarg.GetA_asInt();
81 << 43 //G4cout << "target: Z = " << iZ << " N = " << iA << G4endl;
82 G4GIDI_target* aGIDITarget = << 44
83 get_target_from_map(lend_manager->GetNucle << 45 G4double ke = aTrack.GetKineticEnergy();
84 if (aGIDITarget == nullptr) { << 46 //G4cout << "projectile: KE = " << ke/MeV << " [MeV]" << G4endl;
85 // G4cout << " No target found " << G4endl; << 47
86 theParticleChange.Clear(); << 48 G4HadFinalState* theResult = &theParticleChange;
87 theParticleChange.SetStatusChange(isAlive) << 49 theResult->Clear();
88 theParticleChange.SetEnergyChange(aTrack.G << 50
89 theParticleChange.SetMomentumChange(aTrack << 51 G4GIDI_target* aTarget = usedTarget_map.find( lend_manager->GetNucleusEncoding( iZ , iA ) )->second->GetTarget();
90 return &theParticleChange; << 52 std::vector<G4GIDI_Product>* products = aTarget->getOthersFinalState( ke*MeV, temp, NULL, NULL );
91 } << 53 if ( products != NULL )
92 // return returnUnchanged(aTrack, theResult); << 54 {
93 << 55
94 // Get GIDI final state products for givern << 56 G4ThreeVector psum(0);
95 G4int loop(0); << 57
96 G4int loopMax = 1000; << 58 int totN = 0;
97 std::vector<G4GIDI_Product>* products; << 59 for ( G4int j = 0; j < int( products->size() ); j++ )
98 do { << 60 {
99 products = aGIDITarget->getOthersFinalStat << 61
100 loop++; << 62 G4int jZ = (*products)[j].Z;
101 } while (products == nullptr && loop < loopM << 63 G4int jA = (*products)[j].A;
102 << 64
103 // G4LENDInelastic accepts all light fragmen << 65 //G4cout << "ZA = " << 1000 * (*products)[j].Z + (*products)[j].A << " EK = "
104 // and removes any heavy fragments which cau << 66 // << (*products)[j].kineticEnergy
105 // Charge and energy non-conservation still << 67 // << " px " << (*products)[j].px
106 // of events, this improves on average. << 68 // << " py " << (*products)[j].py
107 << 69 // << " pz " << (*products)[j].pz
108 if (loop > loopMax - 1) { << 70 // << G4endl;
109 // G4cout << " too many loops, return initi << 71
110 << 72 G4DynamicParticle* theSec = new G4DynamicParticle;
111 theParticleChange.Clear(); << 73
112 theParticleChange.SetStatusChange(isAlive) << 74 if ( jA == 1 && jZ == 1 )
113 theParticleChange.SetEnergyChange(aTrack.G << 75 {
114 theParticleChange.SetMomentumChange(aTrack << 76 theSec->SetDefinition( G4Proton::Proton() );
115 return &theParticleChange; << 77 totN += 1;
116 << 78 }
117 // if (aTrack.GetDefinition() == G4Proton:: << 79 else if ( jA == 1 && jZ == 0 )
118 // aTrack.GetDefinition() == G4Neutron: << 80 {
119 // theResult = preco->ApplyYourself(aTra << 81 theSec->SetDefinition( G4Neutron::Neutron() );
120 // } else { << 82 totN += 1;
121 // theResult = returnUnchanged(aTrack, t << 83 }
122 // } << 84 else if ( jZ > 0 )
123 << 85 {
124 } else { << 86 if ( jA != 0 )
125 G4int iTotZ = iZ + aTrack.GetDefinition()- << 87 {
126 G4int iTotA = iA + aTrack.GetDefinition()- << 88 theSec->SetDefinition( G4ParticleTable::GetParticleTable()->FindIon( jZ , jA , 0 , 0 ) );
127 << 89 totN += jA;
128 // Loop over GIDI products and separate li << 90 }
129 G4int GZtot(0); << 91 else
130 G4int GAtot(0); << 92 {
131 G4int productA(0); << 93 theSec->SetDefinition( G4ParticleTable::GetParticleTable()->FindIon( jZ , iA+1-totN , 0 , 0 ) );
132 G4int productZ(0); << 94 }
133 std::vector<G4int> lightProductIndex; << 95 }
134 std::vector<G4int> heavyProductIndex; << 96 else
135 for (G4int i = 0; i < int( products->size( << 97 {
136 productA = (*products)[i].A; << 98 theSec->SetDefinition( G4Gamma::Gamma() );
137 if (productA < 5) { << 99 }
138 lightProductIndex.push_back(i); << 100
139 GZtot += (*products)[i].Z; << 101 G4ThreeVector p( (*products)[j].px*MeV , (*products)[j].py*MeV , (*products)[j].pz*MeV );
140 GAtot += productA; << 102 psum += p;
141 } else { << 103 if ( p.mag() == 0 ) p = proj_p - psum;
142 heavyProductIndex.push_back(i); << 104
143 } << 105 theSec->SetMomentum( p );
144 } << 106
145 << 107 theResult->AddSecondary( theSec );
146 // Randomize order of heavies to correct s << 108 }
147 // std::random_shuffle(heavyProductIndex.b << 109 }
148 // std::cout << " Heavy product index befo << 110 delete products;
149 // for (G4int i = 0; i < int(heavyProductI << 111
150 // std::cout << std::endl; << 112 theResult->SetStatusChange( stopAndKill );
151 << 113
152 auto rng = std::default_random_engine {}; << 114 return theResult;
153 std::shuffle(heavyProductIndex.begin(), he << 115
154 <<
155 // std::cout << " Heavy product index afte <<
156 // for (G4int i = 0; i < int(heavyProductI <<
157 // std::cout << std::endl; <<
158 <<
159 std::vector<G4int> savedHeavyIndex; <<
160 G4int itest(0); <<
161 for (G4int i = 0; i < int(heavyProductInde <<
162 itest = heavyProductIndex[i]; <<
163 productA = (*products)[itest].A; <<
164 productZ = (*products)[itest].Z; <<
165 if ((GAtot + productA <= iTotA) && (GZto <<
166 savedHeavyIndex.push_back(itest); <<
167 GZtot += productZ; <<
168 GAtot += productA; <<
169 } <<
170 } <<
171 <<
172 /* <<
173 G4cout << " saved light products = "; <<
174 for (G4int k = 0; k < int(lightProductInde <<
175 itest = lightProductIndex[k]; <<
176 G4cout << "(" << (*products)[itest].Z << <<
177 } <<
178 G4cout << G4endl; <<
179 <<
180 G4cout << " saved heavy products = "; <<
181 for (G4int k = 0; k < int(savedHeavyIndex. <<
182 itest = savedHeavyIndex[k]; <<
183 G4cout << "(" << (*products)[itest].Z << <<
184 } <<
185 G4cout << G4endl; <<
186 */ <<
187 // Now convert saved products to Geant4 pa <<
188 // Note that, at least for heavy fragments <<
189 // have slightly different values. <<
190 <<
191 G4DynamicParticle* theSec = nullptr; <<
192 G4ThreeVector Psum; <<
193 for (G4int i = 0; i < int(lightProductInde <<
194 itest = lightProductIndex[i]; <<
195 productZ = (*products)[itest].Z; <<
196 productA = (*products)[itest].A; <<
197 theSec = new G4DynamicParticle(); <<
198 if (productA == 1 && productZ == 0) { <<
199 theSec->SetDefinition(G4Neutron::Neutr <<
200 } else if (productA == 1 && productZ == <<
201 theSec->SetDefinition(G4Proton::Proton <<
202 } else if (productA == 2 && productZ == <<
203 theSec->SetDefinition(G4Deuteron::Deut <<
204 } else if (productA == 3 && productZ == <<
205 theSec->SetDefinition(G4Triton::Triton <<
206 } else if (productA == 4 && productZ == <<
207 theSec->SetDefinition(G4Alpha::Alpha() <<
208 } else { <<
209 theSec->SetDefinition(G4Gamma::Gamma() <<
210 } <<
211 <<
212 G4ThreeVector momentum((*products)[itest <<
213 (*products)[itest <<
214 (*products)[itest <<
215 Psum += momentum; <<
216 theSec->SetMomentum(momentum); <<
217 // theResult->AddSecondary(theSec); <<
218 theParticleChange.AddSecondary(theSec, s <<
219 } <<
220 <<
221 G4int productM(0); <<
222 for (G4int i = 0; i < int(savedHeavyIndex. <<
223 itest = savedHeavyIndex[i]; <<
224 productZ = (*products)[itest].Z; <<
225 productA = (*products)[itest].A; <<
226 productM = (*products)[itest].m; <<
227 theSec = new G4DynamicParticle(); <<
228 theSec->SetDefinition(G4IonTable::GetIon <<
229 <<
230 <<
231 G4ThreeVector momentum((*products)[itest <<
232 (*products)[itest <<
233 (*products)[itest <<
234 Psum += momentum; <<
235 theSec->SetMomentum(momentum); <<
236 // theResult->AddSecondary(theSec); <<
237 theParticleChange.AddSecondary(theSec, s <<
238 } <<
239 <<
240 // Create heavy fragment if necessary to t <<
241 // Note: this step is only required to pre <<
242 // where "catastrophic" non-conserva <<
243 // The residual generated will not n <<
244 // occur in the actual reaction. <<
245 if (iTotA - GAtot > 1) { <<
246 theSec = new G4DynamicParticle(); <<
247 if (iTotZ == GZtot) { <<
248 // Special case when a nucleus of only <<
249 // Violate charge conservation and set <<
250 // G4cout << " Z = 1, A = "<< iTotA - <<
251 theSec->SetDefinition(G4IonTable::GetI <<
252 } else { <<
253 theSec->SetDefinition(G4IonTable::GetI <<
254 } <<
255 theSec->SetMomentum(projMom - Psum); <<
256 // theResult->AddSecondary(theSec); <<
257 theParticleChange.AddSecondary(theSec, s <<
258 } <<
259 } // loop OK <<
260 <<
261 delete products; <<
262 // theResult->SetStatusChange( stopAndKill ); <<
263 theParticleChange.SetStatusChange( stopAndKi <<
264 // return theResult; <<
265 return &theParticleChange; <<
266 } 116 }
267 117