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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 // 070523 add neglecting doppler broadening on 30 // 070523 add neglecting doppler broadening on the fly. T. Koi
31 // 070613 fix memory leaking by T. Koi 31 // 070613 fix memory leaking by T. Koi
32 // 071002 enable cross section dump by T. Koi 32 // 071002 enable cross section dump by T. Koi
33 // 080428 change checking point of "neglecting << 33 // 080428 change checking point of "neglecting doppler broadening" flag
34 // from GetCrossSection to BuildPhysics 34 // from GetCrossSection to BuildPhysicsTable by T. Koi
35 // 081024 G4NucleiPropertiesTable:: to G4Nucle 35 // 081024 G4NucleiPropertiesTable:: to G4NucleiProperties::
36 // 36 //
37 // P. Arce, June-2014 Conversion neutron_hp to 37 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
38 // 38 //
39 #include "G4ParticleHPElasticData.hh" 39 #include "G4ParticleHPElasticData.hh"
40 <<
41 #include "G4Electron.hh" <<
42 #include "G4ElementTable.hh" <<
43 #include "G4HadronicParameters.hh" <<
44 #include "G4Neutron.hh" <<
45 #include "G4NucleiProperties.hh" <<
46 #include "G4Nucleus.hh" <<
47 #include "G4ParticleHPData.hh" <<
48 #include "G4ParticleHPManager.hh" 40 #include "G4ParticleHPManager.hh"
49 #include "G4PhysicalConstants.hh" 41 #include "G4PhysicalConstants.hh"
50 #include "G4Pow.hh" <<
51 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
>> 43 #include "G4Neutron.hh"
>> 44 #include "G4ElementTable.hh"
>> 45 #include "G4ParticleHPData.hh"
>> 46 #include "G4ParticleHPManager.hh"
52 47
53 G4ParticleHPElasticData::G4ParticleHPElasticDa << 48 G4ParticleHPElasticData::G4ParticleHPElasticData()
>> 49 :G4VCrossSectionDataSet("NeutronHPElasticXS")
54 { 50 {
55 SetMinKinEnergy(0 * MeV); << 51 SetMinKinEnergy( 0*MeV );
56 SetMaxKinEnergy(20 * MeV); << 52 SetMaxKinEnergy( 20*MeV );
57 53
58 theCrossSections = nullptr; << 54 ke_cache = 0.0;
59 instanceOfWorker = false; << 55 xs_cache = 0.0;
60 if (G4Threading::IsWorkerThread()) { << 56 element_cache = NULL;
61 instanceOfWorker = true; << 57 material_cache = NULL;
62 } << 58
63 element_cache = nullptr; << 59 theCrossSections = 0;
64 material_cache = nullptr; << 60 onFlightDB = true;
65 ke_cache = 0.0; << 61 // BuildPhysicsTable( *G4Neutron::Neutron() );
66 xs_cache = 0.0; <<
67 // BuildPhysicsTable( *G4Neutron::Neutron() <<
68 } 62 }
69 << 63
70 G4ParticleHPElasticData::~G4ParticleHPElasticD 64 G4ParticleHPElasticData::~G4ParticleHPElasticData()
71 { 65 {
72 if (theCrossSections != nullptr && !instance << 66 if ( theCrossSections != NULL ) {
73 theCrossSections->clearAndDestroy(); << 67 theCrossSections->clearAndDestroy();
74 delete theCrossSections; << 68 delete theCrossSections;
75 theCrossSections = nullptr; << 69 theCrossSections = NULL;
76 } << 70 }
>> 71 }
>> 72
>> 73 G4bool G4ParticleHPElasticData::IsIsoApplicable( const G4DynamicParticle* dp ,
>> 74 G4int /*Z*/ , G4int /*A*/ ,
>> 75 const G4Element* /*elm*/ ,
>> 76 const G4Material* /*mat*/ )
>> 77 {
>> 78
>> 79 G4double eKin = dp->GetKineticEnergy();
>> 80 if ( eKin > GetMaxKinEnergy()
>> 81 || eKin < GetMinKinEnergy()
>> 82 || dp->GetDefinition() != G4Neutron::Neutron() ) return false;
>> 83
>> 84 return true;
77 } 85 }
78 86
79 G4bool G4ParticleHPElasticData::IsIsoApplicabl << 87 G4double G4ParticleHPElasticData::GetIsoCrossSection( const G4DynamicParticle* dp ,
80 << 88 G4int /*Z*/ , G4int /*A*/ ,
81 << 89 const G4Isotope* /*iso*/ ,
82 { << 90 const G4Element* element ,
83 G4double eKin = dp->GetKineticEnergy(); << 91 const G4Material* material )
84 return eKin <= GetMaxKinEnergy() && eKin >= << 92 {
85 && dp->GetDefinition() == G4Neutron:: << 93 if ( dp->GetKineticEnergy() == ke_cache && element == element_cache && material == material_cache ) return xs_cache;
86 } << 94
87 << 95 ke_cache = dp->GetKineticEnergy();
88 G4double G4ParticleHPElasticData::GetIsoCrossS << 96 element_cache = element;
89 << 97 material_cache = material;
90 << 98 G4double xs = GetCrossSection( dp , element , material->GetTemperature() );
91 << 99 xs_cache = xs;
92 { << 100 return xs;
93 if (dp->GetKineticEnergy() == ke_cache && el << 101 }
94 return xs_cache; << 102
95 << 103 /*
96 ke_cache = dp->GetKineticEnergy(); << 104 G4bool G4ParticleHPElasticData::IsApplicable(const G4DynamicParticle*aP, const G4Element*)
97 element_cache = element; << 105 {
98 material_cache = material; << 106 G4bool result = true;
99 G4double xs = GetCrossSection(dp, element, m << 107 G4double eKin = aP->GetKineticEnergy();
100 xs_cache = xs; << 108 if(eKin>20*MeV||aP->GetDefinition()!=G4Neutron::Neutron()) result = false;
101 return xs; << 109 return result;
102 } 110 }
>> 111 */
103 112
104 void G4ParticleHPElasticData::BuildPhysicsTabl 113 void G4ParticleHPElasticData::BuildPhysicsTable(const G4ParticleDefinition& aP)
105 { 114 {
106 if (&aP != G4Neutron::Neutron()) <<
107 throw G4HadronicException(__FILE__, __LINE <<
108 "Attempt to use <<
109 <<
110 if (G4Threading::IsWorkerThread()) { <<
111 theCrossSections = G4ParticleHPManager::Ge <<
112 return; <<
113 } <<
114 115
115 std::size_t numberOfElements = G4Element::Ge << 116 if(&aP!=G4Neutron::Neutron())
116 // TKDB << 117 throw G4HadronicException(__FILE__, __LINE__, "Attempt to use NeutronHP data for particles other than neutrons!!!");
117 // if ( theCrossSections == 0 ) theCrossSect << 118
118 if (theCrossSections == nullptr) << 119 //080428
119 theCrossSections = new G4PhysicsTable(numb << 120 if ( getenv( "G4NEUTRONHP_NEGLECT_DOPPLER" ) )
120 else << 121 {
121 theCrossSections->clearAndDestroy(); << 122 G4cout << "Find environment variable of \"G4NEUTRONHP_NEGLECT_DOPPLER\"." << G4endl;
>> 123 G4cout << "On the fly Doppler broadening will be neglect in the cross section calculation of elastic scattering of neutrons (<20MeV)." << G4endl;
>> 124 onFlightDB = false;
>> 125 }
>> 126
>> 127 size_t numberOfElements = G4Element::GetNumberOfElements();
>> 128 // TKDB
>> 129 //if ( theCrossSections == 0 ) theCrossSections = new G4PhysicsTable( numberOfElements );
>> 130 if ( theCrossSections == NULL )
>> 131 theCrossSections = new G4PhysicsTable( numberOfElements );
>> 132 else
>> 133 theCrossSections->clearAndDestroy();
122 134
123 // make a PhysicsVector for each element 135 // make a PhysicsVector for each element
124 136
125 auto theElementTable = G4Element::GetElement << 137 static G4ThreadLocal G4ElementTable *theElementTable = 0 ; if (!theElementTable) theElementTable= G4Element::GetElementTable();
126 for (std::size_t i = 0; i < numberOfElements << 138 for( size_t i=0; i<numberOfElements; ++i )
127 G4PhysicsVector* physVec = G4ParticleHPDat << 139 {
128 ->MakePhysics << 140 G4PhysicsVector* physVec = G4ParticleHPData::
>> 141 Instance(G4Neutron::Neutron())->MakePhysicsVector((*theElementTable)[i], this);
129 theCrossSections->push_back(physVec); 142 theCrossSections->push_back(physVec);
130 } 143 }
131 <<
132 G4ParticleHPManager::GetInstance()->Register <<
133 } 144 }
134 145
135 void G4ParticleHPElasticData::DumpPhysicsTable << 146 void G4ParticleHPElasticData::DumpPhysicsTable(const G4ParticleDefinition& aP)
136 { 147 {
137 #ifdef G4VERBOSE << 148 if(&aP!=G4Neutron::Neutron())
138 if (G4HadronicParameters::Instance()->GetVer << 149 throw G4HadronicException(__FILE__, __LINE__, "Attempt to use NeutronHP data for particles other than neutrons!!!");
>> 150
>> 151 //
>> 152 // Dump element based cross section
>> 153 // range 10e-5 eV to 20 MeV
>> 154 // 10 point per decade
>> 155 // in barn
>> 156 //
>> 157
>> 158 G4cout << G4endl;
>> 159 G4cout << G4endl;
>> 160 G4cout << "Elastic Cross Section of Neutron HP"<< G4endl;
>> 161 G4cout << "(Pointwise cross-section at 0 Kelvin.)" << G4endl;
>> 162 G4cout << G4endl;
>> 163 G4cout << "Name of Element" << G4endl;
>> 164 G4cout << "Energy[eV] XS[barn]" << G4endl;
>> 165 G4cout << G4endl;
>> 166
>> 167 size_t numberOfElements = G4Element::GetNumberOfElements();
>> 168 static G4ThreadLocal G4ElementTable *theElementTable = 0 ; if (!theElementTable) theElementTable= G4Element::GetElementTable();
>> 169
>> 170 for ( size_t i = 0 ; i < numberOfElements ; ++i )
>> 171 {
>> 172
>> 173 G4cout << (*theElementTable)[i]->GetName() << G4endl;
>> 174
>> 175 G4int ie = 0;
>> 176
>> 177 for ( ie = 0 ; ie < 130 ; ie++ )
>> 178 {
>> 179 G4double eKinetic = 1.0e-5 * std::pow ( 10.0 , ie/10.0 ) *eV;
>> 180 G4bool outOfRange = false;
>> 181
>> 182 if ( eKinetic < 20*MeV )
>> 183 {
>> 184 G4cout << eKinetic/eV << " " << (*((*theCrossSections)(i))).GetValue(eKinetic, outOfRange)/barn << G4endl;
>> 185 }
139 186
140 // <<
141 // Dump element based cross section <<
142 // range 10e-5 eV to 20 MeV <<
143 // 10 point per decade <<
144 // in barn <<
145 // <<
146 <<
147 G4cout << G4endl; <<
148 G4cout << G4endl; <<
149 G4cout << "Elastic Cross Section of Neutron <<
150 G4cout << "(Pointwise cross-section at 0 Kel <<
151 G4cout << G4endl; <<
152 G4cout << "Name of Element" << G4endl; <<
153 G4cout << "Energy[eV] XS[barn]" << G4endl; <<
154 G4cout << G4endl; <<
155 <<
156 std::size_t numberOfElements = G4Element::Ge <<
157 auto theElementTable = G4Element::GetElement <<
158 <<
159 for (std::size_t i = 0; i < numberOfElements <<
160 G4cout << (*theElementTable)[i]->GetName() <<
161 G4int ie = 0; <<
162 <<
163 for (ie = 0; ie < 130; ++ie) { <<
164 G4double eKinetic = 1.0e-5 * G4Pow::GetI <<
165 G4bool outOfRange = false; <<
166 <<
167 if (eKinetic < 20 * MeV) { <<
168 G4cout << eKinetic / eV << " " <<
169 << (*((*theCrossSections)(i))). <<
170 } 187 }
171 } << 188
172 G4cout << G4endl; << 189 G4cout << G4endl;
173 } << 190 }
174 #endif << 191
>> 192
>> 193 // G4cout << "G4ParticleHPElasticData::DumpPhysicsTable still to be implemented"<<G4endl;
175 } 194 }
176 195
177 G4double G4ParticleHPElasticData::GetCrossSect << 196 #include "G4Nucleus.hh"
178 << 197 #include "G4NucleiProperties.hh"
>> 198 #include "G4Neutron.hh"
>> 199 #include "G4Electron.hh"
>> 200
>> 201 G4double G4ParticleHPElasticData::
>> 202 GetCrossSection(const G4DynamicParticle* aP, const G4Element*anE, G4double aT)
179 { 203 {
180 G4double result = 0; 204 G4double result = 0;
181 G4bool outOfRange; 205 G4bool outOfRange;
182 auto index = (G4int)anE->GetIndex(); << 206 G4int index = anE->GetIndex();
183 207
184 // prepare neutron 208 // prepare neutron
185 G4double eKinetic = aP->GetKineticEnergy(); 209 G4double eKinetic = aP->GetKineticEnergy();
186 210
187 if (G4ParticleHPManager::GetInstance()->GetN << 211 // T. K.
188 // NEGLECT_DOPPLER_B. << 212 // if ( getenv( "G4NEUTRONHP_NEGLECT_DOPPLER" ) )
189 G4double factor = 1.0; << 213 //080428
190 if (eKinetic < aT * k_Boltzmann) { << 214 if ( !onFlightDB )
191 // below 0.1 eV neutrons << 215 {
192 // Have to do some, but now just igonre. << 216 G4double factor = 1.0;
193 // Will take care after performance chec << 217 if ( eKinetic < aT * k_Boltzmann )
194 // factor = factor * targetV; << 218 {
195 } << 219 // below 0.1 eV neutrons
196 return ((*((*theCrossSections)(index))).Ge << 220 // Have to do some, but now just igonre.
>> 221 // Will take care after performance check.
>> 222 // factor = factor * targetV;
>> 223 }
>> 224 return ( (*((*theCrossSections)(index))).GetValue(eKinetic, outOfRange) )* factor;
197 } 225 }
198 226
199 G4ReactionProduct theNeutron(aP->GetDefiniti << 227 G4ReactionProduct theNeutron( aP->GetDefinition() );
200 theNeutron.SetMomentum(aP->GetMomentum()); << 228 theNeutron.SetMomentum( aP->GetMomentum() );
201 theNeutron.SetKineticEnergy(eKinetic); << 229 theNeutron.SetKineticEnergy( eKinetic );
202 230
203 // prepare thermal nucleus 231 // prepare thermal nucleus
204 G4Nucleus aNuc; 232 G4Nucleus aNuc;
205 G4double eps = 0.0001; 233 G4double eps = 0.0001;
206 G4double theA = anE->GetN(); 234 G4double theA = anE->GetN();
207 G4double theZ = anE->GetZ(); 235 G4double theZ = anE->GetZ();
208 G4double eleMass; << 236 G4double eleMass;
209 237
210 eleMass = (G4NucleiProperties::GetNuclearMas <<
211 / G4Neutron::Neutron()->GetPDGMass <<
212 238
>> 239 eleMass = ( G4NucleiProperties::GetNuclearMass( static_cast<G4int>(theA+eps) , static_cast<G4int>(theZ+eps) )
>> 240 ) / G4Neutron::Neutron()->GetPDGMass();
>> 241
213 G4ReactionProduct boosted; 242 G4ReactionProduct boosted;
214 G4double aXsection; 243 G4double aXsection;
215 << 244
216 // MC integration loop 245 // MC integration loop
217 G4int counter = 0; 246 G4int counter = 0;
218 G4double buffer = 0; 247 G4double buffer = 0;
219 G4int size = G4int(std::max(10., aT / 60 * k << 248 G4int size = G4int(std::max(10., aT/60*kelvin));
220 G4ThreeVector neutronVelocity = << 249 G4ThreeVector neutronVelocity = 1./G4Neutron::Neutron()->GetPDGMass()*theNeutron.GetMomentum();
221 1. / G4Neutron::Neutron()->GetPDGMass() * <<
222 G4double neutronVMag = neutronVelocity.mag() 250 G4double neutronVMag = neutronVelocity.mag();
223 251
224 while (counter == 0 << 252 while(counter == 0 || std::abs(buffer-result/std::max(1,counter)) > 0.03*buffer)
225 || std::abs(buffer - result / std::ma <<
226 > 0.03 * buffer) // Loop checki <<
227 { 253 {
228 if (counter != 0) buffer = result / counte << 254 if(counter) buffer = result/counter;
229 while (counter < size) // Loop checking, << 255 while (counter<size)
230 { 256 {
231 counter++; << 257 counter ++;
232 G4ReactionProduct aThermalNuc = aNuc.Get 258 G4ReactionProduct aThermalNuc = aNuc.GetThermalNucleus(eleMass, aT);
233 boosted.Lorentz(theNeutron, aThermalNuc) 259 boosted.Lorentz(theNeutron, aThermalNuc);
234 G4double theEkin = boosted.GetKineticEne 260 G4double theEkin = boosted.GetKineticEnergy();
235 aXsection = (*((*theCrossSections)(index 261 aXsection = (*((*theCrossSections)(index))).GetValue(theEkin, outOfRange);
236 // velocity correction. 262 // velocity correction.
237 G4ThreeVector targetVelocity = 1. / aThe << 263 G4ThreeVector targetVelocity = 1./aThermalNuc.GetMass()*aThermalNuc.GetMomentum();
238 aXsection *= (targetVelocity - neutronVe << 264 aXsection *= (targetVelocity-neutronVelocity).mag()/neutronVMag;
239 result += aXsection; 265 result += aXsection;
240 } 266 }
241 size += size; 267 size += size;
242 } 268 }
243 result /= counter; 269 result /= counter;
244 /* << 270 /*
245 // Checking impact of G4NEUTRONHP_NEGLECT << 271 // Checking impact of G4NEUTRONHP_NEGLECT_DOPPLER
246 G4cout << " result " << result << " " << 272 G4cout << " result " << result << " "
247 << (*((*theCrossSections)(index))). << 273 << (*((*theCrossSections)(index))).GetValue(eKinetic, outOfRange) << " "
248 << (*((*theCrossSections)(index))). << 274 << (*((*theCrossSections)(index))).GetValue(eKinetic, outOfRange) /result << G4endl;
249 */ << 275 */
250 return result; 276 return result;
251 } 277 }
252 278
253 G4int G4ParticleHPElasticData::GetVerboseLevel << 279 G4int G4ParticleHPElasticData::
254 { << 280 GetVerboseLevel() const
255 return G4ParticleHPManager::GetInstance()->G <<
256 } <<
257 <<
258 void G4ParticleHPElasticData::SetVerboseLevel( <<
259 { 281 {
260 G4ParticleHPManager::GetInstance()->SetVerbo << 282 return G4ParticleHPManager::GetInstance()->GetVerboseLevel();
261 } 283 }
262 284
263 void G4ParticleHPElasticData::CrossSectionDesc << 285 void G4ParticleHPElasticData::
>> 286 SetVerboseLevel( G4int newValue )
264 { 287 {
265 outFile << "High Precision cross data based << 288 G4ParticleHPManager::GetInstance()->SetVerboseLevel(newValue);
266 "reaction of neutrons below 20MeV <<
267 } 289 }
268 290