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25 // 25 //
26 // neutron_hp -- source file 26 // neutron_hp -- source file
27 // J.P. Wellisch, Nov-1996 27 // J.P. Wellisch, Nov-1996
28 // A prototype of the low energy neutron trans 28 // A prototype of the low energy neutron transport model.
29 // 29 //
30 // 12-Apr-06 fix in delayed neutron and photon 30 // 12-Apr-06 fix in delayed neutron and photon emission without FS data by T. Koi
31 // 07-Sep-11 M. Kelsey -- Follow change to G4H 31 // 07-Sep-11 M. Kelsey -- Follow change to G4HadFinalState interface
32 // P. Arce, June-2014 Conversion neutron_hp to 32 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
33 // 33 //
34 34
35 #include "G4ParticleHPFissionFS.hh" <<
36 <<
37 #include "G4DynamicParticleVector.hh" <<
38 #include "G4Exp.hh" 35 #include "G4Exp.hh"
39 #include "G4IonTable.hh" << 36 #include "G4ParticleHPFissionFS.hh"
>> 37 #include "G4PhysicalConstants.hh"
40 #include "G4Nucleus.hh" 38 #include "G4Nucleus.hh"
>> 39 #include "G4DynamicParticleVector.hh"
41 #include "G4ParticleHPFissionERelease.hh" 40 #include "G4ParticleHPFissionERelease.hh"
42 #include "G4PhysicalConstants.hh" << 41 #include "G4IonTable.hh"
43 #include "G4PhysicsModelCatalog.hh" 42 #include "G4PhysicsModelCatalog.hh"
44 43
45 G4ParticleHPFissionFS::G4ParticleHPFissionFS() <<
46 { <<
47 secID = G4PhysicsModelCatalog::GetModelID("m <<
48 hasXsec = false; <<
49 produceFissionFragments = false; <<
50 } <<
51 <<
52 void G4ParticleHPFissionFS::Init(G4double A, G <<
53 const G4Strin <<
54 { <<
55 theFS.Init(A, Z, M, dirName, aFSType, projec <<
56 theFC.Init(A, Z, M, dirName, aFSType, projec <<
57 theSC.Init(A, Z, M, dirName, aFSType, projec <<
58 theTC.Init(A, Z, M, dirName, aFSType, projec <<
59 theLC.Init(A, Z, M, dirName, aFSType, projec <<
60 <<
61 theFF.Init(A, Z, M, dirName, aFSType, projec <<
62 if (G4ParticleHPManager::GetInstance()->GetP <<
63 G4cout << "Fission fragment production is <<
64 << "Z = " << (G4int)Z << ", A = " < <<
65 G4cout << "As currently modeled this optio <<
66 "fission fragments." <<
67 << G4endl; <<
68 produceFissionFragments = true; <<
69 } <<
70 } <<
71 <<
72 G4HadFinalState* G4ParticleHPFissionFS::ApplyY <<
73 { <<
74 // Because it may change by UI command <<
75 produceFissionFragments = G4ParticleHPManage <<
76 <<
77 // prepare neutron <<
78 if (theResult.Get() == nullptr) theResult.Pu <<
79 theResult.Get()->Clear(); <<
80 G4double eKinetic = theTrack.GetKineticEnerg <<
81 const G4HadProjectile* incidentParticle = &t <<
82 G4ReactionProduct theNeutron( <<
83 const_cast<G4ParticleDefinition*>(incident <<
84 theNeutron.SetMomentum(incidentParticle->Get <<
85 theNeutron.SetKineticEnergy(eKinetic); <<
86 <<
87 // prepare target <<
88 G4Nucleus aNucleus; <<
89 G4ReactionProduct theTarget; <<
90 G4double targetMass = theFS.GetMass(); <<
91 G4ThreeVector neuVelo = <<
92 (1. / incidentParticle->GetDefinition()->G <<
93 theTarget = <<
94 aNucleus.GetBiasedThermalNucleus(targetMas <<
95 theTarget.SetDefinition( <<
96 G4IonTable::GetIonTable()->GetIon(G4int(th <<
97 <<
98 // set neutron and target in the FS classes <<
99 theFS.SetNeutronRP(theNeutron); <<
100 theFS.SetTarget(theTarget); <<
101 theFC.SetNeutronRP(theNeutron); <<
102 theFC.SetTarget(theTarget); <<
103 theSC.SetNeutronRP(theNeutron); <<
104 theSC.SetTarget(theTarget); <<
105 theTC.SetNeutronRP(theNeutron); <<
106 theTC.SetTarget(theTarget); <<
107 theLC.SetNeutronRP(theNeutron); <<
108 theLC.SetTarget(theTarget); <<
109 theFF.SetNeutronRP(theNeutron); <<
110 theFF.SetTarget(theTarget); <<
111 <<
112 // boost to target rest system and decide on <<
113 theNeutron.Lorentz(theNeutron, -1 * theTarge <<
114 <<
115 // dice the photons <<
116 <<
117 G4DynamicParticleVector* thePhotons; <<
118 thePhotons = theFS.GetPhotons(); <<
119 <<
120 // select the FS in charge <<
121 <<
122 eKinetic = theNeutron.GetKineticEnergy(); <<
123 G4double xSec[4]; <<
124 xSec[0] = theFC.GetXsec(eKinetic); <<
125 xSec[1] = xSec[0] + theSC.GetXsec(eKinetic); <<
126 xSec[2] = xSec[1] + theTC.GetXsec(eKinetic); <<
127 xSec[3] = xSec[2] + theLC.GetXsec(eKinetic); <<
128 G4int it; <<
129 unsigned int i = 0; <<
130 G4double random = G4UniformRand(); <<
131 if (xSec[3] == 0) { <<
132 it = -1; <<
133 } <<
134 else { <<
135 for (i = 0; i < 4; i++) { <<
136 it = i; <<
137 if (random < xSec[i] / xSec[3]) break; <<
138 } <<
139 } <<
140 <<
141 // dice neutron multiplicities, energies and <<
142 // no energy conservation on an event-to-eve <<
143 // also for mean, we rely on the consistancy <<
144 <<
145 G4int Prompt = 0, delayed = 0, all = 0; <<
146 G4DynamicParticleVector* theNeutrons = nullp <<
147 switch (it) // check logic, and ask, if par <<
148 // particles @@@ <<
149 { <<
150 case 0: <<
151 theFS.SampleNeutronMult(all, Prompt, del <<
152 if (Prompt == 0 && delayed == 0) Prompt <<
153 theNeutrons = theFC.ApplyYourself(Prompt <<
154 // take 'U' into account explicitly (see <<
155 break; <<
156 case 1: <<
157 theFS.SampleNeutronMult(all, Prompt, del <<
158 if (Prompt == 0 && delayed == 0) Prompt <<
159 theNeutrons = theSC.ApplyYourself(Prompt <<
160 break; <<
161 case 2: <<
162 theFS.SampleNeutronMult(all, Prompt, del <<
163 if (Prompt == 0 && delayed == 0) Prompt <<
164 theNeutrons = theTC.ApplyYourself(Prompt <<
165 break; <<
166 case 3: <<
167 theFS.SampleNeutronMult(all, Prompt, del <<
168 if (Prompt == 0 && delayed == 0) Prompt <<
169 theNeutrons = theLC.ApplyYourself(Prompt <<
170 break; <<
171 default: <<
172 break; <<
173 } <<
174 <<
175 // dice delayed neutrons and photons, and fa <<
176 // for Prompt in case channel had no FS data <<
177 <<
178 if (produceFissionFragments) delayed = 0; <<
179 <<
180 G4double* theDecayConstants; <<
181 <<
182 if (theNeutrons != nullptr) { <<
183 theDecayConstants = new G4double[delayed]; <<
184 for (i = 0; i < theNeutrons->size(); ++i) <<
185 theResult.Get()->AddSecondary(theNeutron <<
186 } <<
187 delete theNeutrons; <<
188 <<
189 G4DynamicParticleVector* theDelayed = null <<
190 theDelayed = theFS.ApplyYourself(0, delaye <<
191 for (i = 0; i < theDelayed->size(); i++) { <<
192 G4double time = -G4Log(G4UniformRand()) <<
193 time += theTrack.GetGlobalTime(); <<
194 theResult.Get()->AddSecondary(theDelayed <<
195 theResult.Get()->GetSecondary(theResult. <<
196 } <<
197 delete theDelayed; <<
198 } <<
199 else { <<
200 theFS.SampleNeutronMult(all, Prompt, delay <<
201 theDecayConstants = new G4double[delayed]; <<
202 if (Prompt == 0 && delayed == 0) Prompt = <<
203 theNeutrons = theFS.ApplyYourself(Prompt, <<
204 G4int i0; <<
205 for (i0 = 0; i0 < Prompt; ++i0) { <<
206 theResult.Get()->AddSecondary(theNeutron <<
207 } <<
208 44
209 for (i0 = Prompt; i0 < Prompt + delayed; + << 45 G4ParticleHPFissionFS::G4ParticleHPFissionFS()
210 // Protect against the very rare case of << 46 {
211 G4double time = 0.0; << 47 secID = G4PhysicsModelCatalog::GetModelID( "model_NeutronHPFission" );
212 if (theDecayConstants[i0 - Prompt] > 1.0 << 48 hasXsec = false;
213 time = -G4Log(G4UniformRand()) / theDe << 49 produceFissionFragments = false;
214 } << 50 }
215 else { << 51
216 G4ExceptionDescription ed; << 52 void G4ParticleHPFissionFS::Init (G4double A, G4double Z, G4int M,
217 ed << " theDecayConstants[i0-Prompt]=" << 53 G4String& dirName, G4String& aFSType,
218 << " -> cannot sample the time : << 54 G4ParticleDefinition* projectile )
219 G4Exception("G4ParticleHPFissionFS::Ap << 55 {
220 } << 56 theFS.Init(A, Z, M, dirName, aFSType, projectile);
221 << 57 theFC.Init(A, Z, M, dirName, aFSType, projectile);
222 time += theTrack.GetGlobalTime(); << 58 theSC.Init(A, Z, M, dirName, aFSType, projectile);
223 theResult.Get()->AddSecondary(theNeutron << 59 theTC.Init(A, Z, M, dirName, aFSType, projectile);
224 theResult.Get()->GetSecondary(theResult. << 60 theLC.Init(A, Z, M, dirName, aFSType, projectile);
>> 61
>> 62 theFF.Init(A, Z, M, dirName, aFSType, projectile);
>> 63 if ( G4ParticleHPManager::GetInstance()->GetProduceFissionFragments()
>> 64 && theFF.HasFSData() )
>> 65 {
>> 66 G4cout << "Fission fragment production is now activated in HP package for "
>> 67 << "Z = " << (G4int)Z
>> 68 << ", A = " << (G4int)A
>> 69 << G4endl;
>> 70 G4cout << "As currently modeled this option precludes production of delayed neutrons from fission fragments." << G4endl;
>> 71 produceFissionFragments = true;
225 } 72 }
226 delete theNeutrons; << 73 }
227 } <<
228 delete[] theDecayConstants; <<
229 <<
230 std::size_t nPhotons = 0; <<
231 if (thePhotons != nullptr) { <<
232 nPhotons = thePhotons->size(); <<
233 for (i = 0; i < nPhotons; ++i) { <<
234 theResult.Get()->AddSecondary(thePhotons <<
235 } <<
236 delete thePhotons; <<
237 } <<
238 <<
239 // finally deal with local energy deposition <<
240 74
241 G4ParticleHPFissionERelease* theERelease = t << 75 G4HadFinalState * G4ParticleHPFissionFS::ApplyYourself(const G4HadProjectile & theTrack)
242 G4double eDepByFragments = theERelease->GetF << 76 {
243 // theResult.SetLocalEnergyDeposit(eDepByFra << 77 // Because it may change by UI command
244 if (!produceFissionFragments) theResult.Get( << 78 produceFissionFragments=G4ParticleHPManager::GetInstance()->GetProduceFissionFragments();
245 // clean up the primary neutron << 79
246 theResult.Get()->SetStatusChange(stopAndKill << 80 // prepare neutron
247 << 81 if ( theResult.Get() == NULL ) theResult.Put( new G4HadFinalState );
248 if (produceFissionFragments) { << 82 theResult.Get()->Clear();
249 G4int fragA_Z = 0; << 83 G4double eKinetic = theTrack.GetKineticEnergy();
250 G4int fragA_A = 0; << 84 const G4HadProjectile *incidentParticle = &theTrack;
251 G4int fragA_M = 0; << 85 G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition()) );
252 // System is traget rest! << 86 theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() );
253 theFF.GetAFissionFragment(eKinetic, fragA_ << 87 theNeutron.SetKineticEnergy( eKinetic );
254 if (0 == fragA_A) { return theResult.Get() << 88
255 G4int fragB_Z = (G4int)theBaseZ - fragA_Z; << 89 // prepare target
256 G4int fragB_A = (G4int)theBaseA - fragA_A << 90 G4Nucleus aNucleus;
257 << 91 G4ReactionProduct theTarget;
258 G4IonTable* pt = G4IonTable::GetIonTable() << 92 G4double targetMass = theFS.GetMass();
259 // Excitation energy is not taken into acc << 93 G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum();
260 G4ParticleDefinition* pdA = pt->GetIon(fra << 94 theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature());
261 G4ParticleDefinition* pdB = pt->GetIon(fra << 95 theTarget.SetDefinition( G4IonTable::GetIonTable()->GetIon( G4int(theBaseZ), G4int(theBaseA) , 0.0 ) ); //TESTPHP
262 << 96
263 // Isotropic Distribution << 97 // set neutron and target in the FS classes
264 G4double phi = twopi * G4UniformRand(); << 98 theFS.SetNeutronRP(theNeutron);
265 // Bug #1745 DHW G4double theta = pi*G4Uni << 99 theFS.SetTarget(theTarget);
266 G4double costheta = 2. * G4UniformRand() - << 100 theFC.SetNeutronRP(theNeutron);
267 G4double theta = std::acos(costheta); << 101 theFC.SetTarget(theTarget);
268 G4double sinth = std::sin(theta); << 102 theSC.SetNeutronRP(theNeutron);
269 G4ThreeVector direction(sinth * std::cos(p << 103 theSC.SetTarget(theTarget);
270 << 104 theTC.SetNeutronRP(theNeutron);
271 // Just use ENDF value for this << 105 theTC.SetTarget(theTarget);
272 G4double ER = eDepByFragments; << 106 theLC.SetNeutronRP(theNeutron);
273 G4double ma = pdA->GetPDGMass(); << 107 theLC.SetTarget(theTarget);
274 G4double mb = pdB->GetPDGMass(); << 108 theFF.SetNeutronRP(theNeutron);
275 G4double EA = ER / (1 + ma / mb); << 109 theFF.SetTarget(theTarget);
276 G4double EB = ER - EA; << 110
277 auto dpA = new G4DynamicParticle(pdA, dire << 111 // boost to target rest system and decide on channel.
278 auto dpB = new G4DynamicParticle(pdB, -dir << 112 theNeutron.Lorentz(theNeutron, -1*theTarget);
279 theResult.Get()->AddSecondary(dpA, secID); << 113
280 theResult.Get()->AddSecondary(dpB, secID); << 114 // dice the photons
281 } << 115
>> 116 G4DynamicParticleVector * thePhotons;
>> 117 thePhotons = theFS.GetPhotons();
>> 118
>> 119 // select the FS in charge
>> 120
>> 121 eKinetic = theNeutron.GetKineticEnergy();
>> 122 G4double xSec[4];
>> 123 xSec[0] = theFC.GetXsec(eKinetic);
>> 124 xSec[1] = xSec[0]+theSC.GetXsec(eKinetic);
>> 125 xSec[2] = xSec[1]+theTC.GetXsec(eKinetic);
>> 126 xSec[3] = xSec[2]+theLC.GetXsec(eKinetic);
>> 127 G4int it;
>> 128 unsigned int i=0;
>> 129 G4double random = G4UniformRand();
>> 130 if(xSec[3]==0)
>> 131 {
>> 132 it=-1;
>> 133 }
>> 134 else
>> 135 {
>> 136 for(i=0; i<4; i++)
>> 137 {
>> 138 it =i;
>> 139 if(random<xSec[i]/xSec[3]) break;
>> 140 }
>> 141 }
>> 142
>> 143 // dice neutron multiplicities, energies and momenta in Lab. @@
>> 144 // no energy conservation on an event-to-event basis. we rely on the data to be ok. @@
>> 145 // also for mean, we rely on the consistancy of the data. @@
>> 146
>> 147 G4int Prompt=0, delayed=0, all=0;
>> 148 G4DynamicParticleVector * theNeutrons = 0;
>> 149 switch(it) // check logic, and ask, if partials can be assumed to correspond to individual particles @@@
>> 150 {
>> 151 case 0:
>> 152 theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0);
>> 153 if(Prompt==0&&delayed==0) Prompt=all;
>> 154 theNeutrons = theFC.ApplyYourself(Prompt); // delayed always in FS
>> 155 // take 'U' into account explicitly (see 5.4) in the sampling of energy @@@@
>> 156 break;
>> 157 case 1:
>> 158 theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 1);
>> 159 if(Prompt==0&&delayed==0) Prompt=all;
>> 160 theNeutrons = theSC.ApplyYourself(Prompt); // delayed always in FS, off done in FSFissionFS
>> 161 break;
>> 162 case 2:
>> 163 theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 2);
>> 164 if(Prompt==0&&delayed==0) Prompt=all;
>> 165 theNeutrons = theTC.ApplyYourself(Prompt); // delayed always in FS
>> 166 break;
>> 167 case 3:
>> 168 theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 3);
>> 169 if(Prompt==0&&delayed==0) Prompt=all;
>> 170 theNeutrons = theLC.ApplyYourself(Prompt); // delayed always in FS
>> 171 break;
>> 172 default:
>> 173 break;
>> 174 }
>> 175
>> 176 // dice delayed neutrons and photons, and fallback
>> 177 // for Prompt in case channel had no FS data; add all paricles to FS.
>> 178
>> 179 if ( produceFissionFragments ) delayed=0;
>> 180
>> 181 G4double * theDecayConstants;
>> 182
>> 183 if( theNeutrons != 0)
>> 184 {
>> 185 theDecayConstants = new G4double[delayed];
>> 186 for(i=0; i<theNeutrons->size(); ++i)
>> 187 {
>> 188 theResult.Get()->AddSecondary(theNeutrons->operator[](i), secID);
>> 189 }
>> 190 delete theNeutrons;
>> 191
>> 192 G4DynamicParticleVector * theDelayed = 0;
>> 193 theDelayed = theFS.ApplyYourself(0, delayed, theDecayConstants);
>> 194 for(i=0; i<theDelayed->size(); i++)
>> 195 {
>> 196 G4double time = -G4Log(G4UniformRand())/theDecayConstants[i];
>> 197 time += theTrack.GetGlobalTime();
>> 198 theResult.Get()->AddSecondary(theDelayed->operator[](i), secID);
>> 199 theResult.Get()->GetSecondary(theResult.Get()->GetNumberOfSecondaries()-1)->SetTime(time);
>> 200 }
>> 201 delete theDelayed;
>> 202 }
>> 203 else
>> 204 {
>> 205 theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0);
>> 206 theDecayConstants = new G4double[delayed];
>> 207 if(Prompt==0&&delayed==0) Prompt=all;
>> 208 theNeutrons = theFS.ApplyYourself(Prompt, delayed, theDecayConstants);
>> 209 G4int i0;
>> 210 for(i0=0; i0<Prompt; ++i0)
>> 211 {
>> 212 theResult.Get()->AddSecondary(theNeutrons->operator[](i0), secID);
>> 213 }
>> 214
>> 215 for(i0=Prompt; i0<Prompt+delayed; ++i0)
>> 216 {
>> 217 // Protect against the very rare case of division by zero
>> 218 G4double time = 0.0;
>> 219 if ( theDecayConstants[i0-Prompt] > 1.0e-30 ) {
>> 220 time = -G4Log(G4UniformRand())/theDecayConstants[i0-Prompt];
>> 221 } else {
>> 222 G4ExceptionDescription ed;
>> 223 ed << " theDecayConstants[i0-Prompt]=" << theDecayConstants[i0-Prompt]
>> 224 << " -> cannot sample the time : set it to 0.0 !" << G4endl;
>> 225 G4Exception( "G4ParticleHPFissionFS::ApplyYourself ", "HAD_FISSIONHP_001", JustWarning, ed );
>> 226 }
>> 227
>> 228 time += theTrack.GetGlobalTime();
>> 229 theResult.Get()->AddSecondary(theNeutrons->operator[](i0), secID);
>> 230 theResult.Get()->GetSecondary(theResult.Get()->GetNumberOfSecondaries()-1)->SetTime(time);
>> 231 }
>> 232 delete theNeutrons;
>> 233 }
>> 234 delete [] theDecayConstants;
>> 235
>> 236 std::size_t nPhotons = 0;
>> 237 if(thePhotons!=0)
>> 238 {
>> 239 nPhotons = thePhotons->size();
>> 240 for(i=0; i<nPhotons; ++i)
>> 241 {
>> 242 theResult.Get()->AddSecondary(thePhotons->operator[](i), secID);
>> 243 }
>> 244 delete thePhotons;
>> 245 }
>> 246
>> 247 // finally deal with local energy depositions.
>> 248
>> 249 G4ParticleHPFissionERelease * theERelease = theFS.GetEnergyRelease();
>> 250 G4double eDepByFragments = theERelease->GetFragmentKinetic();
>> 251 //theResult.SetLocalEnergyDeposit(eDepByFragments);
>> 252 if ( !produceFissionFragments ) theResult.Get()->SetLocalEnergyDeposit(eDepByFragments);
>> 253 // clean up the primary neutron
>> 254 theResult.Get()->SetStatusChange(stopAndKill);
>> 255
>> 256 if ( produceFissionFragments )
>> 257 {
>> 258 G4int fragA_Z=0;
>> 259 G4int fragA_A=0;
>> 260 G4int fragA_M=0;
>> 261 // System is traget rest!
>> 262 theFF.GetAFissionFragment(eKinetic,fragA_Z,fragA_A,fragA_M);
>> 263 G4int fragB_Z=(G4int)theBaseZ-fragA_Z;
>> 264 G4int fragB_A=(G4int)theBaseA-fragA_A-Prompt;
>> 265
>> 266 G4IonTable* pt = G4IonTable::GetIonTable();
>> 267 //Excitation energy is not taken into account
>> 268 G4ParticleDefinition* pdA = pt->GetIon( fragA_Z , fragA_A , 0.0 );
>> 269 G4ParticleDefinition* pdB = pt->GetIon( fragB_Z , fragB_A , 0.0 );
>> 270
>> 271 //Isotropic Distribution
>> 272 G4double phi = twopi*G4UniformRand();
>> 273 // Bug #1745 DHW G4double theta = pi*G4UniformRand();
>> 274 G4double costheta = 2.*G4UniformRand()-1.;
>> 275 G4double theta = std::acos(costheta);
>> 276 G4double sinth = std::sin(theta);
>> 277 G4ThreeVector direction(sinth*std::cos(phi), sinth*std::sin(phi), costheta);
>> 278
>> 279 // Just use ENDF value for this
>> 280 G4double ER = eDepByFragments;
>> 281 G4double ma = pdA->GetPDGMass();
>> 282 G4double mb = pdB->GetPDGMass();
>> 283 G4double EA = ER / ( 1 + ma/mb);
>> 284 G4double EB = ER - EA;
>> 285 G4DynamicParticle* dpA = new G4DynamicParticle( pdA , direction , EA);
>> 286 G4DynamicParticle* dpB = new G4DynamicParticle( pdB , -direction , EB);
>> 287 theResult.Get()->AddSecondary(dpA, secID);
>> 288 theResult.Get()->AddSecondary(dpB, secID);
>> 289 }
282 290
283 return theResult.Get(); << 291 return theResult.Get();
284 } << 292 }
285 293