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>> 26 // $Id: G4BGGNucleonElasticXS.cc 93682 2015-10-28 10:09:49Z gcosmo $
>> 27 //
26 // ------------------------------------------- 28 // -------------------------------------------------------------------
27 // 29 //
28 // GEANT4 Class file 30 // GEANT4 Class file
29 // 31 //
30 // 32 //
31 // File name: G4BGGNucleonElasticXS 33 // File name: G4BGGNucleonElasticXS
32 // 34 //
33 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
34 // 36 //
35 // Creation date: 13.03.2007 37 // Creation date: 13.03.2007
>> 38 // Modifications:
>> 39 //
36 // 40 //
37 // ------------------------------------------- 41 // -------------------------------------------------------------------
38 // 42 //
39 43
40 #include "G4BGGNucleonElasticXS.hh" 44 #include "G4BGGNucleonElasticXS.hh"
41 #include "G4SystemOfUnits.hh" 45 #include "G4SystemOfUnits.hh"
42 #include "G4ComponentGGHadronNucleusXsc.hh" 46 #include "G4ComponentGGHadronNucleusXsc.hh"
43 #include "G4NucleonNuclearCrossSection.hh" 47 #include "G4NucleonNuclearCrossSection.hh"
44 #include "G4HadronNucleonXsc.hh" 48 #include "G4HadronNucleonXsc.hh"
45 #include "G4NuclearRadii.hh" << 49 #include "G4ComponentSAIDTotalXS.hh"
46 #include "G4Proton.hh" 50 #include "G4Proton.hh"
47 #include "G4Neutron.hh" 51 #include "G4Neutron.hh"
48 #include "G4NistManager.hh" 52 #include "G4NistManager.hh"
49 #include "G4NuclearRadii.hh" << 53 #include "G4Log.hh"
>> 54 #include "G4Exp.hh"
50 55
51 #include "G4CrossSectionDataSetRegistry.hh" 56 #include "G4CrossSectionDataSetRegistry.hh"
52 57
53 G4double G4BGGNucleonElasticXS::theGlauberFacP << 58 const G4double llog10 = G4Log(10.);
54 G4double G4BGGNucleonElasticXS::theCoulombFacP <<
55 G4double G4BGGNucleonElasticXS::theGlauberFacN <<
56 G4double G4BGGNucleonElasticXS::theCoulombFacN <<
57 G4int G4BGGNucleonElasticXS::theA[93] = {0}; <<
58 59
59 G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(c 60 G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(const G4ParticleDefinition* p)
60 : G4VCrossSectionDataSet("BarashenkovGlauberG << 61 : G4VCrossSectionDataSet("Barashenkov-Glauber")
61 { 62 {
62 verboseLevel = 0; 63 verboseLevel = 0;
63 fGlauberEnergy = 91.*GeV; 64 fGlauberEnergy = 91.*GeV;
64 fLowEnergy = 14.0*MeV; << 65 fPDGEnergy = 5*GeV;
65 fNucleon = new G4NucleonNuclearCrossSection( << 66 fLowEnergy = 14.*MeV;
66 fGlauber = new G4ComponentGGHadronNucleusXsc << 67 fSAIDLowEnergyLimit = 1*MeV;
67 fHadron = new G4HadronNucleonXsc(); << 68 fSAIDHighEnergyLimit = 1.3*GeV;
68 << 69 fLowestXSection = millibarn;
69 theProton = G4Proton::Proton(); << 70 for (G4int i = 0; i < 93; ++i) {
70 isProton = (theProton == p); << 71 theGlauberFac[i] = 0.0;
71 SetForAllAtomsAndEnergies(true); << 72 theCoulombFac[i] = 0.0;
72 << 73 theA[i] = 1;
73 if (0 == theA[0]) { Initialise(); } << 74 }
>> 75 fNucleon = 0;
>> 76 fGlauber = 0;
>> 77 fHadron = 0;
>> 78 fSAID = 0;
>> 79 particle = p;
>> 80 theProton= G4Proton::Proton();
>> 81 isProton = false;
>> 82 isInitialized = false;
74 } 83 }
75 84
76 //....oooOO0OOooo........oooOO0OOooo........oo 85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77 86
78 G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS( 87 G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS()
79 { 88 {
>> 89 delete fSAID;
80 delete fHadron; 90 delete fHadron;
>> 91 // The cross section registry will delete fNucleon
>> 92 delete fGlauber;
81 } 93 }
82 94
83 //....oooOO0OOooo........oooOO0OOooo........oo 95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
84 96
85 G4bool 97 G4bool
86 G4BGGNucleonElasticXS::IsElementApplicable(con 98 G4BGGNucleonElasticXS::IsElementApplicable(const G4DynamicParticle*, G4int,
87 con << 99 const G4Material*)
88 { 100 {
89 return true; 101 return true;
90 } 102 }
91 103
92 //....oooOO0OOooo........oooOO0OOooo........oo 104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93 105
94 G4bool G4BGGNucleonElasticXS::IsIsoApplicable( 106 G4bool G4BGGNucleonElasticXS::IsIsoApplicable(const G4DynamicParticle*,
95 << 107 G4int Z, G4int,
96 << 108 const G4Element*,
97 << 109 const G4Material*)
98 { 110 {
99 return (1 == Z); 111 return (1 == Z);
100 } 112 }
101 113
102 //....oooOO0OOooo........oooOO0OOooo........oo 114 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
103 115
104 G4double 116 G4double
105 G4BGGNucleonElasticXS::GetElementCrossSection( 117 G4BGGNucleonElasticXS::GetElementCrossSection(const G4DynamicParticle* dp,
106 << 118 G4int ZZ, const G4Material*)
107 { 119 {
108 // this method should be called only for Z > 120 // this method should be called only for Z > 1
109 121
110 G4double cross = 0.0; 122 G4double cross = 0.0;
111 G4int Z = std::min(ZZ, 92); <<
112 G4double ekin = dp->GetKineticEnergy(); 123 G4double ekin = dp->GetKineticEnergy();
>> 124 G4int Z = ZZ;
113 if(1 == Z) { 125 if(1 == Z) {
114 cross = 1.0115*GetIsoCrossSection(dp,1,1); 126 cross = 1.0115*GetIsoCrossSection(dp,1,1);
115 } else { 127 } else {
>> 128 if(Z > 92) { Z = 92; }
>> 129
116 if(ekin <= fLowEnergy) { 130 if(ekin <= fLowEnergy) {
117 cross = (isProton) ? theCoulombFacP[Z] : << 131 cross = theCoulombFac[Z]*CoulombFactor(ekin, Z);
118 cross *= CoulombFactor(ekin, Z); << 132
119 } else if(ekin > fGlauberEnergy) { 133 } else if(ekin > fGlauberEnergy) {
120 cross = (isProton) ? theGlauberFacP[Z] : << 134 cross = theGlauberFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, theA[Z]);
121 cross *= fGlauber->GetElasticGlauberGrib <<
122 } else { 135 } else {
123 cross = fNucleon->GetElasticCrossSection 136 cross = fNucleon->GetElasticCrossSection(dp, Z);
124 } 137 }
125 } 138 }
126 #ifdef G4VERBOSE << 139
127 if (verboseLevel > 1) { << 140 if(verboseLevel > 1) {
128 G4cout << "G4BGGNucleonElasticXS::GetEleme 141 G4cout << "G4BGGNucleonElasticXS::GetElementCrossSection for "
129 << dp->GetDefinition()->GetParticle << 142 << dp->GetDefinition()->GetParticleName()
130 << " Ekin(GeV)= " << dp->GetKineti << 143 << " Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
131 << " in nucleus Z= " << Z << " A= << 144 << " in nucleus Z= " << Z << " A= " << theA[Z]
132 << " XS(b)= " << cross/barn << 145 << " XS(b)= " << cross/barn
133 << G4endl; << 146 << G4endl;
134 } 147 }
135 #endif << 148 //AR-04Dec2013 if(cross <= fLowestXSection) { cross = 0.0; }
136 return cross; 149 return cross;
137 } 150 }
138 151
139 //....oooOO0OOooo........oooOO0OOooo........oo 152 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
140 153
141 G4double 154 G4double
142 G4BGGNucleonElasticXS::GetIsoCrossSection(cons 155 G4BGGNucleonElasticXS::GetIsoCrossSection(const G4DynamicParticle* dp,
143 G4in << 156 G4int Z, G4int A,
144 cons << 157 const G4Isotope*,
145 cons << 158 const G4Element*,
146 cons << 159 const G4Material*)
147 { 160 {
148 // this method should be called only for Z = 161 // this method should be called only for Z = 1
149 fHadron->HadronNucleonXscNS(dp->GetDefinitio <<
150 dp->GetKineticEn <<
151 G4double cross = A*fHadron->GetElasticHadron <<
152 162
153 #ifdef G4VERBOSE << 163 G4double cross = 0.0;
154 if (verboseLevel > 1) { << 164 G4double ekin = dp->GetKineticEnergy();
>> 165
>> 166 if(ekin <= fSAIDLowEnergyLimit) {
>> 167 cross = theCoulombFac[0]*CoulombFactor(ekin, 1);
>> 168 } else if(ekin <= fSAIDHighEnergyLimit) {
>> 169 cross = fSAID->GetElasticIsotopeCrossSection(particle, ekin, 1, 1);
>> 170 } else if(ekin <= fPDGEnergy) {
>> 171 G4double cross1 =
>> 172 fSAID->GetElasticIsotopeCrossSection(particle, fPDGEnergy, 1, 1);
>> 173 G4double cross2 = theCoulombFac[1];
>> 174 cross = cross1 + (cross2 - cross1)*(ekin - fSAIDHighEnergyLimit)
>> 175 /(fPDGEnergy - fSAIDHighEnergyLimit);
>> 176 } else {
>> 177 fHadron->GetHadronNucleonXscPDG(dp, theProton);
>> 178 cross = fHadron->GetElasticHadronNucleonXsc();
>> 179 }
>> 180 cross *= A;
>> 181
>> 182 if(verboseLevel > 1) {
155 G4cout << "G4BGGNucleonElasticXS::GetIsoCr 183 G4cout << "G4BGGNucleonElasticXS::GetIsoCrossSection for "
156 << dp->GetDefinition()->GetParticle << 184 << dp->GetDefinition()->GetParticleName()
157 << " Ekin(GeV)= " << dp->GetKineti << 185 << " Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
158 << " in nucleus Z=1 A=" << A << 186 << " in nucleus Z= " << Z << " A= " << A
159 << " XS(b)= " << cross/barn << 187 << " XS(b)= " << cross/barn
160 << G4endl; << 188 << G4endl;
161 } 189 }
162 #endif << 190 //AR-04Dec2013 if(cross <= fLowestXSection) { cross = 0.0; }
163 return cross; 191 return cross;
164 } 192 }
165 193
166 //....oooOO0OOooo........oooOO0OOooo........oo 194 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
167 195
168 void G4BGGNucleonElasticXS::BuildPhysicsTable( 196 void G4BGGNucleonElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
169 { 197 {
170 if(&p == theProton || &p == G4Neutron::Neutr 198 if(&p == theProton || &p == G4Neutron::Neutron()) {
171 isProton = (theProton == &p); << 199 particle = &p;
172 200
173 } else { 201 } else {
174 G4ExceptionDescription ed; << 202 G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to "
175 ed << "This BGG cross section is applicabl << 203 << p.GetParticleName()
176 << p.GetParticleName() << G4endl; << 204 << G4endl;
177 G4Exception("G4BGGNucleonElasticXS::BuildP << 205 throw G4HadronicException(__FILE__, __LINE__,
178 FatalException, ed); << 206 "G4BGGNucleonElasticXS::BuildPhysicsTable is used for wrong particle");
>> 207 return;
179 } 208 }
180 } <<
181 209
182 //....oooOO0OOooo........oooOO0OOooo........oo << 210 if(isInitialized) { return; }
>> 211 isInitialized = true;
>> 212
>> 213 fNucleon = (G4NucleonNuclearCrossSection*)G4CrossSectionDataSetRegistry::Instance()->GetCrossSectionDataSet(G4NucleonNuclearCrossSection::Default_Name());
>> 214 fGlauber = new G4ComponentGGHadronNucleusXsc();
>> 215 fHadron = new G4HadronNucleonXsc();
>> 216 fSAID = new G4ComponentSAIDTotalXS();
>> 217
>> 218 fNucleon->BuildPhysicsTable(*particle);
>> 219 fGlauber->BuildPhysicsTable(*particle);
>> 220
>> 221 if(particle == theProton) {
>> 222 isProton = true;
>> 223 fSAIDHighEnergyLimit = 3*GeV;
>> 224 }
183 225
184 void G4BGGNucleonElasticXS::Initialise() <<
185 { <<
186 theA[0] = theA[1] = 1; <<
187 G4ThreeVector mom(0.0,0.0,1.0); 226 G4ThreeVector mom(0.0,0.0,1.0);
188 G4DynamicParticle dp(theProton, mom, fGlaube << 227 G4DynamicParticle dp(particle, mom, fGlauberEnergy);
189 228
190 G4NistManager* nist = G4NistManager::Instanc 229 G4NistManager* nist = G4NistManager::Instance();
>> 230
191 G4double csup, csdn; 231 G4double csup, csdn;
>> 232 G4int A;
>> 233
>> 234 if(verboseLevel > 0) {
>> 235 G4cout << "### G4BGGNucleonElasticXS::Initialise for "
>> 236 << particle->GetParticleName() << G4endl;
>> 237 }
>> 238
>> 239 for(G4int iz=2; iz<93; iz++) {
192 240
193 for (G4int iz=2; iz<93; ++iz) { << 241 A = G4lrint(nist->GetAtomicMassAmu(iz));
194 G4int A = G4lrint(nist->GetAtomicMassAmu(i <<
195 theA[iz] = A; 242 theA[iz] = A;
196 243
197 csup = fGlauber->GetElasticGlauberGribov(& 244 csup = fGlauber->GetElasticGlauberGribov(&dp, iz, A);
198 csdn = fNucleon->GetElasticCrossSection(&d 245 csdn = fNucleon->GetElasticCrossSection(&dp, iz);
199 theGlauberFacP[iz] = csdn/csup; <<
200 } <<
201 <<
202 dp.SetDefinition(G4Neutron::Neutron()); <<
203 for (G4int iz=2; iz<93; ++iz) { <<
204 csup = fGlauber->GetElasticGlauberGribov(& <<
205 csdn = fNucleon->GetElasticCrossSection(&d <<
206 theGlauberFacN[iz] = csdn/csup; <<
207 246
208 if (verboseLevel > 1) { << 247 theGlauberFac[iz] = csdn/csup;
209 G4cout << "G4BGGNucleonElasticXS::Init << 248 if(verboseLevel > 0) {
210 << " GFactorP=" << theGlauberFa << 249 G4cout << "Z= " << iz << " A= " << A
211 << " GFactorN=" << theGlauberFa << 250 << " factor= " << theGlauberFac[iz] << G4endl;
212 } 251 }
213 } 252 }
214 253
215 theCoulombFacP[0] = theCoulombFacP[1] = << 254 theCoulombFac[0] =
216 theCoulombFacN[0] = theCoulombFacN[1] = 1. << 255 fSAID->GetElasticIsotopeCrossSection(particle,fSAIDLowEnergyLimit,1,1)
217 dp.SetDefinition(theProton); << 256 /CoulombFactor(fSAIDLowEnergyLimit, 1);
>> 257
>> 258 dp.SetKineticEnergy(fPDGEnergy);
>> 259 fHadron->GetHadronNucleonXscPDG(&dp, theProton);
>> 260 theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();
>> 261
>> 262 if(verboseLevel > 0) {
>> 263 G4cout << "Z=1 A=1 " << " factor0= " << theCoulombFac[0]
>> 264 << " factor1= " << theCoulombFac[1]
>> 265 << G4endl;
>> 266 }
>> 267
218 dp.SetKineticEnergy(fLowEnergy); 268 dp.SetKineticEnergy(fLowEnergy);
219 for (G4int iz=2; iz<93; ++iz) { << 269 for(G4int iz=2; iz<93; iz++) {
220 theCoulombFacP[iz] = fNucleon->GetElasticC << 270 theCoulombFac[iz] =
221 /CoulombFactor(fLowEnergy, iz); << 271 fNucleon->GetElasticCrossSection(&dp, iz)/CoulombFactor(fLowEnergy, iz);
222 } << 272 if(verboseLevel > 0) {
223 dp.SetDefinition(G4Neutron::Neutron()); << 273 G4cout << "Z= " << iz << " A= " << theA[iz]
224 for(G4int iz=2; iz<93; ++iz) { << 274 << " factor= " << theCoulombFac[iz] << G4endl;
225 theCoulombFacN[iz] = fNucleon->GetElasticC <<
226 /CoulombFactor(fLowEnergy, iz); <<
227 <<
228 if (verboseLevel > 1) { <<
229 G4cout << "G4BGGNucleonElasticXS::Initia <<
230 << " CFactorP=" << theCoulombFacP[iz] <<
231 << " CFactorN=" << theCoulombFacN[iz] < <<
232 } 275 }
233 } 276 }
234 } 277 }
235 278
236 //....oooOO0OOooo........oooOO0OOooo........oo 279 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
237 280
238 G4double G4BGGNucleonElasticXS::CoulombFactor( 281 G4double G4BGGNucleonElasticXS::CoulombFactor(G4double kinEnergy, G4int Z)
239 { 282 {
240 return (isProton) ? << 283 G4double res= 1.0;
241 G4NuclearRadii::CoulombFactor(Z, theA[Z], << 284
>> 285 // from G4ProtonInelasticCrossSection
>> 286 if(isProton) {
>> 287
>> 288 if (Z <= 1) { return kinEnergy*kinEnergy; }
>> 289
>> 290 G4double elog = G4Log(kinEnergy/GeV)/llog10;
>> 291 G4double aa = theA[Z];
>> 292
>> 293 G4double ff1 = 5.6 - 0.016*aa; // slope of the drop at medium energies.
>> 294 G4double ff2 = 1.37 + 1.37/aa; // start of the slope.
>> 295 G4double ff3 = 0.8 + 18./aa - 0.002*aa; // stephight
>> 296 res = 1.0 + ff3*(1.0 - (1.0/(1+G4Exp(-ff1*(elog + ff2)))));
>> 297
>> 298 ff1 = 8. - 8./aa - 0.008*aa; // slope of the rise
>> 299 ff2 = 2.34 - 5.4/aa - 0.0028*aa; // start of the rise
>> 300 res /= (1.0 + G4Exp(-ff1*(elog + ff2)));
>> 301
>> 302 }
>> 303 return res;
242 } 304 }
243 305
244 //....oooOO0OOooo........oooOO0OOooo........oo 306 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
245 307
246 void G4BGGNucleonElasticXS::CrossSectionDescri 308 void G4BGGNucleonElasticXS::CrossSectionDescription(std::ostream& outFile) const
247 { 309 {
248 outFile << "The Barashenkov-Glauber-Gribov c 310 outFile << "The Barashenkov-Glauber-Gribov cross section handles elastic\n"
249 << "scattering of protons and neutro 311 << "scattering of protons and neutrons from nuclei using the\n"
250 << "Barashenkov parameterization bel 312 << "Barashenkov parameterization below 91 GeV and the Glauber-Gribov\n"
251 << "parameterization above 91 GeV. n 313 << "parameterization above 91 GeV. n";
252 } 314 }
253 315
254 //....oooOO0OOooo........oooOO0OOooo........oo 316 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
255 317