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25 // 25 //
>> 26 // $Id: G4NeutronElasticXS.cc,v 1.12 2011-01-09 02:37:48 dennis Exp $
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class file 31 // GEANT4 Class file
29 // 32 //
30 // 33 //
31 // File name: G4NeutronElasticXS 34 // File name: G4NeutronElasticXS
32 // 35 //
33 // Author Ivantchenko, Geant4, 3-Aug-09 36 // Author Ivantchenko, Geant4, 3-Aug-09
34 // 37 //
35 // Modifications: 38 // Modifications:
36 // 39 //
37 40
>> 41 #include "G4HadronicException.hh"
38 #include "G4NeutronElasticXS.hh" 42 #include "G4NeutronElasticXS.hh"
39 #include "G4Neutron.hh" 43 #include "G4Neutron.hh"
40 #include "G4DynamicParticle.hh" 44 #include "G4DynamicParticle.hh"
41 #include "G4ElementTable.hh" <<
42 #include "G4Material.hh" <<
43 #include "G4Element.hh" 45 #include "G4Element.hh"
>> 46 #include "G4ElementTable.hh"
44 #include "G4PhysicsLogVector.hh" 47 #include "G4PhysicsLogVector.hh"
45 #include "G4CrossSectionDataSetRegistry.hh" << 48 #include "G4PhysicsVector.hh"
46 #include "G4ComponentGGHadronNucleusXsc.hh" << 49 #include "G4GlauberGribovCrossSection.hh"
47 #include "G4HadronicParameters.hh" << 50 #include "G4HadronNucleonXsc.hh"
48 #include "Randomize.hh" << 51 #include "G4NistManager.hh"
49 #include "G4SystemOfUnits.hh" << 52 #include "G4Proton.hh"
50 #include "G4IsotopeList.hh" <<
51 #include "G4AutoLock.hh" <<
52 53
>> 54 #include <iostream>
53 #include <fstream> 55 #include <fstream>
54 #include <sstream> 56 #include <sstream>
55 57
56 G4PhysicsVector* G4NeutronElasticXS::data[] = << 58 using namespace std;
57 G4double G4NeutronElasticXS::coeff[] = {0.0}; <<
58 G4String G4NeutronElasticXS::gDataDirectory = <<
59 G4bool G4NeutronElasticXS::fLock = true; <<
60 <<
61 namespace <<
62 { <<
63 G4Mutex nElasticXSMutex = G4MUTEX_INITIALIZE <<
64 } <<
65 59
66 G4NeutronElasticXS::G4NeutronElasticXS() 60 G4NeutronElasticXS::G4NeutronElasticXS()
67 : G4VCrossSectionDataSet(Default_Name()), << 61 : G4VCrossSectionDataSet("G4NeutronElasticXS"),
68 neutron(G4Neutron::Neutron()) << 62 proton(G4Proton::Proton()), maxZ(92)
69 { 63 {
70 // verboseLevel = 0; 64 // verboseLevel = 0;
71 if (verboseLevel > 0){ << 65 if(verboseLevel > 0){
72 G4cout << "G4NeutronElasticXS::G4NeutronE 66 G4cout << "G4NeutronElasticXS::G4NeutronElasticXS Initialise for Z < "
73 << MAXZEL << G4endl; << 67 << maxZ + 1 << G4endl;
74 } 68 }
75 ggXsection = << 69 data.resize(maxZ+1, 0);
76 G4CrossSectionDataSetRegistry::Instance()- << 70 coeff.resize(maxZ+1, 1.0);
77 if (ggXsection == nullptr) << 71 ggXsection = new G4GlauberGribovCrossSection();
78 ggXsection = new G4ComponentGGHadronNucleu << 72 fNucleon = new G4HadronNucleonXsc();
79 SetForAllAtomsAndEnergies(true); << 73 isInitialized = false;
80 FindDirectoryPath(); <<
81 } 74 }
82 75
83 G4NeutronElasticXS::~G4NeutronElasticXS() 76 G4NeutronElasticXS::~G4NeutronElasticXS()
84 { 77 {
85 if (isFirst) { << 78 for(G4int i=0; i<=maxZ; ++i) {
86 for(G4int i=0; i<MAXZEL; ++i) { << 79 delete data[i];
87 delete data[i]; <<
88 data[i] = nullptr; <<
89 } <<
90 } 80 }
91 } 81 }
92 82
93 void G4NeutronElasticXS::CrossSectionDescripti <<
94 { <<
95 outFile << "G4NeutronElasticXS calculates th <<
96 << "cross section on nuclei using da <<
97 << "neutron database. These data ar <<
98 << "the resonance region in order to <<
99 << "For high energies Glauber-Gribiv <<
100 } <<
101 <<
102 G4bool 83 G4bool
103 G4NeutronElasticXS::IsElementApplicable(const << 84 G4NeutronElasticXS::IsApplicable(const G4DynamicParticle*,
104 G4int, const G4Material*) << 85 const G4Element*)
105 { 86 {
106 return true; 87 return true;
107 } 88 }
108 89
109 G4bool G4NeutronElasticXS::IsIsoApplicable(con << 90 G4bool
110 G4i << 91 G4NeutronElasticXS::IsIsoApplicable(const G4DynamicParticle*,
111 con << 92 G4int /*ZZ*/, G4int /*AA*/)
112 { 93 {
113 return false; 94 return false;
114 } 95 }
115 96
116 G4double 97 G4double
117 G4NeutronElasticXS::GetElementCrossSection(con << 98 G4NeutronElasticXS::GetCrossSection(const G4DynamicParticle* aParticle,
118 G4int Z, const G4Material*) << 99 const G4Element* elm, G4double)
119 { 100 {
120 return ElementCrossSection(aParticle->GetKin << 101 G4double xs = 0.0;
121 aParticle->GetLogKineticEnergy(), Z << 102 G4double ekin = aParticle->GetKineticEnergy();
122 } <<
123 103
124 G4double << 104 G4int Z = G4int(elm->GetZ());
125 G4NeutronElasticXS::ComputeCrossSectionPerElem << 105 if(Z < 1 || Z > maxZ) { return xs; }
126 const G4ParticleDefinition*, << 106 G4int Amean = G4int(G4NistManager::Instance()->GetAtomicMassAmu(Z)+0.5);
127 const G4Element* elm, << 107 G4PhysicsVector* pv = data[Z];
128 const G4Material*) << 108 // G4cout << "G4NeutronElasticXS::GetCrossSection e= " << ekin << " Z= " << Z << G4endl;
129 { << 109
130 return ElementCrossSection(ekin, loge, elm-> << 110 // element was not initialised
131 } << 111 if(!pv) {
132 << 112 Initialise(Z);
133 G4double G4NeutronElasticXS::ElementCrossSecti << 113 pv = data[Z];
134 { << 114 if(!pv) { return xs; }
135 G4int Z = (ZZ >= MAXZEL) ? MAXZEL - 1 : ZZ; << 115 }
136 auto pv = GetPhysicsVector(Z); << 116
>> 117 G4double e1 = pv->Energy(0);
>> 118 if(ekin <= e1) { return (*pv)[0]; }
>> 119
>> 120 G4int n = pv->GetVectorLength() - 1;
>> 121 G4double e2 = pv->Energy(n);
>> 122
>> 123 if(ekin <= e2) {
>> 124 xs = pv->Value(ekin);
>> 125 } else if(1 == Z) {
>> 126 fNucleon->GetHadronNucleonXscPDG(aParticle, proton);
>> 127 xs = coeff[1]*fNucleon->GetElasticHadronNucleonXsc();
>> 128 } else {
>> 129 ggXsection->GetZandACrossSection(aParticle, Z, Amean);
>> 130 xs = coeff[Z]*ggXsection->GetElasticGlauberGribovXsc();
>> 131 }
137 132
138 G4double xs = (ekin <= pv->GetMaxEnergy()) ? << 133 if(verboseLevel > 0){
139 : coeff[Z]*ggXsection->GetElasticElementCr << 134 G4cout << "ekin= " << ekin << ", XSinel= " << xs << G4endl;
140 <<
141 <<
142 #ifdef G4VERBOSE <<
143 if(verboseLevel > 1) { <<
144 G4cout << "Z= " << Z << " Ekin(MeV)= " << <<
145 << ", nElmXSel(b)= " << xs/CLHEP::barn <<
146 << G4endl; <<
147 } 135 }
148 #endif <<
149 return xs; 136 return xs;
150 } 137 }
151 138
152 G4double <<
153 G4NeutronElasticXS::ComputeIsoCrossSection(G4d <<
154 const G4ParticleDefinition* <<
155 G4int Z, G4int A, <<
156 const G4Isotope*, const G4E <<
157 const G4Material*) <<
158 { <<
159 return ElementCrossSection(ekin, loge, Z)*A/ <<
160 } <<
161 <<
162 G4double <<
163 G4NeutronElasticXS::GetIsoCrossSection(const G <<
164 G4int Z, G4int A, <<
165 const G4Isotope*, const G4Eleme <<
166 const G4Material*) <<
167 { <<
168 return ElementCrossSection(aParticle->GetKin <<
169 aParticle->GetLogKineticEnergy(), Z <<
170 <<
171 } <<
172 <<
173 const G4Isotope* G4NeutronElasticXS::SelectIso <<
174 const G4Element* anElement, G4double, G4 <<
175 { <<
176 G4int nIso = (G4int)anElement->GetNumberOfIs <<
177 const G4Isotope* iso = anElement->GetIsotope <<
178 <<
179 //G4cout << "SelectIsotope NIso= " << nIso < <<
180 if(1 == nIso) { return iso; } <<
181 <<
182 const G4double* abundVector = anElement->Get <<
183 G4double q = G4UniformRand(); <<
184 G4double sum = 0.0; <<
185 <<
186 // isotope wise cross section not used <<
187 for (G4int j=0; j<nIso; ++j) { <<
188 sum += abundVector[j]; <<
189 if(q <= sum) { <<
190 iso = anElement->GetIsotope(j); <<
191 break; <<
192 } <<
193 } <<
194 return iso; <<
195 } <<
196 139
197 void 140 void
198 G4NeutronElasticXS::BuildPhysicsTable(const G4 141 G4NeutronElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
199 { 142 {
200 if(verboseLevel > 0){ 143 if(verboseLevel > 0){
201 G4cout << "G4NeutronElasticXS::BuildPhysic 144 G4cout << "G4NeutronElasticXS::BuildPhysicsTable for "
202 << p.GetParticleName() << G4endl; 145 << p.GetParticleName() << G4endl;
203 } 146 }
204 if(p.GetParticleName() != "neutron") { << 147 if(isInitialized || p.GetParticleName() != "neutron") { return; }
205 G4ExceptionDescription ed; << 148 isInitialized = true;
206 ed << p.GetParticleName() << " is a wrong <<
207 << " only neutron is allowed"; <<
208 G4Exception("G4NeutronElasticXS::BuildPhys <<
209 FatalException, ed, ""); <<
210 return; <<
211 } <<
212 if (fLock || isFirst) { <<
213 G4AutoLock l(&nElasticXSMutex); <<
214 if (fLock) { <<
215 isFirst = true; <<
216 fLock = false; <<
217 FindDirectoryPath(); <<
218 } <<
219 149
220 // Access to elements << 150 // check environment variable
221 const G4ElementTable* table = G4Element::G << 151 // Build the complete string identifying the file with the data set
222 for ( auto & elm : *table ) { << 152 char* path = getenv("G4NEUTRONXSDATA");
223 G4int Z = std::max( 1, std::min( elm->Ge << 153 if (!path){
224 if ( nullptr == data[Z] ) { Initialise(Z << 154 G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl;
>> 155 }
>> 156
>> 157 G4DynamicParticle* dynParticle =
>> 158 new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1);
>> 159
>> 160 // Access to elements
>> 161 const G4ElementTable* theElmTable = G4Element::GetElementTable();
>> 162 size_t numOfElm = G4Element::GetNumberOfElements();
>> 163 if(numOfElm > 0) {
>> 164 for(size_t i=0; i<numOfElm; ++i) {
>> 165 G4int Z = G4int(((*theElmTable)[i])->GetZ());
>> 166 if(Z < 1) { Z = 1; }
>> 167 else if(Z > maxZ) { Z = maxZ; }
>> 168 //G4cout << "Z= " << Z << G4endl;
>> 169 // Initialisation
>> 170 if(!data[Z]) { Initialise(Z, dynParticle, path); }
225 } 171 }
226 l.unlock(); <<
227 } 172 }
>> 173 delete dynParticle;
228 } 174 }
229 175
230 const G4String& G4NeutronElasticXS::FindDirect << 176 void
>> 177 G4NeutronElasticXS::DumpPhysicsTable(const G4ParticleDefinition&)
231 { 178 {
232 // build the complete string identifying the <<
233 if (gDataDirectory.empty()) { <<
234 std::ostringstream ost; <<
235 ost << G4HadronicParameters::Instance()->G <<
236 gDataDirectory = ost.str(); <<
237 } <<
238 return gDataDirectory; <<
239 } 179 }
240 180
241 void G4NeutronElasticXS::InitialiseOnFly(G4int << 181 void
>> 182 G4NeutronElasticXS::Initialise(G4int Z, G4DynamicParticle* dp,
>> 183 const char* p)
242 { 184 {
243 G4AutoLock l(&nElasticXSMutex); << 185 if(data[Z]) { return; }
244 Initialise(Z); << 186 const char* path = p;
245 l.unlock(); << 187 if(!p) {
246 } << 188 // check environment variable
>> 189 // Build the complete string identifying the file with the data set
>> 190 path = getenv("G4NEUTRONXSDATA");
>> 191 if (!path) {
>> 192 if(verboseLevel > 1) {
>> 193 G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl;
>> 194 }
>> 195 return;
>> 196 }
>> 197 }
>> 198 G4DynamicParticle* dynParticle = dp;
>> 199 if(!dp) {
>> 200 dynParticle =
>> 201 new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1);
>> 202 }
247 203
248 void G4NeutronElasticXS::Initialise(G4int Z) << 204 G4int Amean = G4int(G4NistManager::Instance()->GetAtomicMassAmu(Z)+0.5);
249 { <<
250 if(data[Z] != nullptr) { return; } <<
251 205
252 // upload data from file 206 // upload data from file
253 data[Z] = new G4PhysicsLogVector(); 207 data[Z] = new G4PhysicsLogVector();
254 208
255 std::ostringstream ost; 209 std::ostringstream ost;
256 ost << FindDirectoryPath() << Z ; << 210 ost << path << "/elast" << Z ;
257 std::ifstream filein(ost.str().c_str()); 211 std::ifstream filein(ost.str().c_str());
258 if (!filein.is_open()) { << 212 if (!(filein)) {
259 G4ExceptionDescription ed; << 213 G4cout << ost.str()
260 ed << "Data file <" << ost.str().c_str() << 214 << " is not opened by G4NeutronElasticXS" << G4endl;
261 << "> is not opened!"; << 215 throw G4HadronicException(__FILE__, __LINE__,
262 G4Exception("G4NeutronElasticXS::Initialis << 216 "G4NeutronElasticXS: no data sets registered");
263 FatalException, ed, "Check G4P <<
264 return; 217 return;
265 } << 218 }else{
266 if(verboseLevel > 1) { << 219 if(verboseLevel > 1) {
267 G4cout << "file " << ost.str() << 220 G4cout << "file " << ost.str()
268 << " is opened by G4NeutronElasticXS" << << 221 << " is opened by G4NeutronElasticXS" << G4endl;
269 } << 222 }
270 223
271 // retrieve data from DB << 224 // retrieve data from DB
272 if(!data[Z]->Retrieve(filein, true)) { << 225 data[Z]->Retrieve(filein, true);
273 G4ExceptionDescription ed; << 226
274 ed << "Data file <" << ost.str().c_str() << 227 // smooth transition
275 << "> is not retrieved!"; << 228 size_t n = data[Z]->GetVectorLength() - 1;
276 G4Exception("G4NeutronElasticXS::Initialis << 229 G4double emax = data[Z]->Energy(n);
277 FatalException, ed, "Check G4PARTICLEXSDAT << 230 G4double sig1 = (*data[Z])[n];
278 return; << 231 dynParticle->SetKineticEnergy(emax);
279 } << 232 G4double sig2 = 0.0;
280 // smooth transition << 233 if(1 == Z) {
281 G4double sig1 = (*(data[Z]))[data[Z]->GetVe << 234 fNucleon->GetHadronNucleonXscPDG(dynParticle, proton);
282 G4double ehigh = data[Z]->GetMaxEnergy(); << 235 sig2 = fNucleon->GetElasticHadronNucleonXsc();
283 G4double sig2 = ggXsection->GetElasticEleme << 236 } else {
284 ehigh, Z, aeff[ << 237 ggXsection->GetZandACrossSection(dynParticle, Z, Amean);
285 coeff[Z] = (sig2 > 0.) ? sig1/sig2 : 1.0; << 238 sig2 = ggXsection->GetElasticGlauberGribovXsc();
>> 239 }
>> 240 if(sig2 > 0.) { coeff[Z] = sig1/sig2; }
>> 241 }
>> 242 if(!dp) { delete dynParticle; }
286 } 243 }
287 244