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<< 61 52 62 //....oooOO0OOooo........oooOO0OOooo........oo 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 63 54 64 G4BGGPionElasticXS::G4BGGPionElasticXS(const G << 55 G4BGGPionElasticXS::G4BGGPionElasticXS(const G4ParticleDefinition*) 65 : G4VCrossSectionDataSet("BarashenkovGlauberG << 66 { 56 { 67 verboseLevel = 0; 57 verboseLevel = 0; 68 fGlauberEnergy = 91.*CLHEP::GeV; << 58 fGlauberEnergy = 91.*GeV; 69 fLowEnergy = 20.*CLHEP::MeV; << 59 fLowEnergy = 20.*MeV; 70 fLowestEnergy = 1.*CLHEP::MeV; << 60 fPion = 0; 71 SetMinKinEnergy(0.0); << 61 fGlauber = 0; 72 SetMaxKinEnergy( G4HadronicParameters::Insta << 62 fHadron = 0; 73 << 63 particle = 0; 74 fPion = new G4UPiNuclearCrossSection(); << 64 isPiplus = false; 75 fGlauber = new G4ComponentGGHadronNucleusXsc << 65 isInitialized = false; 76 fHadron = new G4HadronNucleonXsc(); << 77 << 78 fG4pow = G4Pow::GetInstance(); << 79 << 80 theProton = G4Proton::Proton(); << 81 thePiPlus = G4PionPlus::PionPlus(); << 82 isPiplus = (p == thePiPlus); << 83 SetForAllAtomsAndEnergies(true); << 84 << 85 if (0 == theA[0]) { Initialise(); } << 86 } 66 } 87 67 88 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 89 69 90 G4BGGPionElasticXS::~G4BGGPionElasticXS() 70 G4BGGPionElasticXS::~G4BGGPionElasticXS() 91 { 71 { >> 72 delete fGlauber; >> 73 delete fPion; 92 delete fHadron; 74 delete fHadron; 93 } 75 } 94 76 95 //....oooOO0OOooo........oooOO0OOooo........oo 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 96 78 97 G4bool << 79 G4double G4BGGPionElasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp, 98 G4BGGPionElasticXS::IsElementApplicable(const << 80 G4double Z, 99 const << 81 G4double A, 100 { << 82 G4double) 101 return true; << 102 } << 103 << 104 //....oooOO0OOooo........oooOO0OOooo........oo << 105 << 106 G4bool G4BGGPionElasticXS::IsIsoApplicable(con << 107 G4i << 108 con << 109 { << 110 return (1 == Z); << 111 } << 112 << 113 //....oooOO0OOooo........oooOO0OOooo........oo << 114 << 115 G4double << 116 G4BGGPionElasticXS::GetElementCrossSection(con << 117 G4i << 118 { 83 { 119 // this method should be called only for Z > << 120 G4double cross = 0.0; 84 G4double cross = 0.0; 121 G4double ekin = std::max(dp->GetKineticEnerg << 85 G4double ekin = dp->GetKineticEnergy(); 122 G4int Z = std::min(ZZ, 92); << 86 G4int iz = G4int(Z); 123 if(1 == Z) { << 87 if(iz > 92) iz = 92; 124 cross = 1.0115*GetIsoCrossSection(dp,1,1); << 88 125 } else { << 89 if(ekin <= fLowEnergy) { 126 if(ekin <= fLowEnergy) { << 90 cross = theCoulombFac[iz]; 127 cross = (isPiplus) ? theCoulombFacPiPlus << 91 if(isPiplus) { cross *= CoulombFactor(ekin, A); } 128 : theCoulombFacPiMinus[Z]*FactorPiMinu << 92 129 } else if(ekin > fGlauberEnergy) { << 93 } else if(iz == 1) { 130 cross = (isPiplus) ? theGlauberFacPiPlus << 94 if( A < 1.5) { 131 cross *= fGlauber->GetElasticGlauberGrib << 95 //fHadron->GetHadronNucleonXscPDG(dp, G4Proton::Proton()); >> 96 //fHadron->GetHadronNucleonXscEL(dp, G4Proton::Proton()); >> 97 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton()); >> 98 //fHadron->GetHadronNucleonXscVU(dp, G4Proton::Proton()); >> 99 //fHadron->GetHadronNucleonXscMK(dp, G4Proton::Proton()); >> 100 cross = fHadron->GetElasticHadronNucleonXsc(); 132 } else { 101 } else { 133 cross = fPion->GetElasticCrossSection(dp << 102 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton()); >> 103 cross = fHadron->GetElasticHadronNucleonXsc(); >> 104 fHadron->GetHadronNucleonXscNS(dp, G4Neutron::Neutron()); >> 105 cross += fHadron->GetElasticHadronNucleonXsc(); 134 } 106 } >> 107 } else if(ekin > fGlauberEnergy) { >> 108 cross = theGlauberFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A); >> 109 } else { >> 110 cross = fPion->GetElasticCrossSection(dp, Z, A); 135 } 111 } 136 #ifdef G4VERBOSE << 137 if(verboseLevel > 1) { << 138 G4cout << "G4BGGPionElasticXS::GetElementC << 139 << dp->GetDefinition()->GetParticle << 140 << " Ekin(GeV)= " << dp->GetKineti << 141 << " in nucleus Z= " << Z << " A= << 142 << " XS(b)= " << cross/barn << 143 << G4endl; << 144 } << 145 #endif << 146 return cross; << 147 } << 148 112 149 //....oooOO0OOooo........oooOO0OOooo........oo << 113 if(verboseLevel > 1) >> 114 G4cout << "G4BGGPionElasticXS::GetCrossSection for " >> 115 << dp->GetDefinition()->GetParticleName() >> 116 << " Ekin(GeV)= " << dp->GetKineticEnergy() >> 117 << " in nucleus Z= " << Z << " A= " << A >> 118 << " XS(b)= " << cross/barn >> 119 << G4endl; 150 120 151 G4double << 152 G4BGGPionElasticXS::GetIsoCrossSection(const G << 153 G4int, << 154 const G << 155 const G << 156 const G << 157 { << 158 // this method should be called only for Z = << 159 fHadron->HadronNucleonXscNS(dp->GetDefinitio << 160 dp->GetKineticEn << 161 G4double cross = A*fHadron->GetElasticHadron << 162 << 163 #ifdef G4VERBOSE << 164 if(verboseLevel > 1) { << 165 G4cout << "G4BGGPionElasticXS::GetIsoCross << 166 << dp->GetDefinition()->GetParticle << 167 << " Ekin(GeV)= " << dp->GetKineti << 168 << " in nucleus Z=1 A=" << A << 169 << " XS(b)= " << cross/barn << 170 << G4endl; << 171 } << 172 #endif << 173 return cross; 121 return cross; 174 } 122 } 175 123 176 //....oooOO0OOooo........oooOO0OOooo........oo 124 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 177 125 178 void G4BGGPionElasticXS::BuildPhysicsTable(con 126 void G4BGGPionElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p) 179 { 127 { 180 if(verboseLevel > 1) { << 181 G4cout << "G4BGGPionElasticXS::BuildPhysic << 182 << p.GetParticleName() << G4endl; << 183 } << 184 if(&p == G4PionPlus::PionPlus() || &p == G4P 128 if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) { 185 isPiplus = (&p == G4PionPlus::PionPlus()); << 129 particle = &p; >> 130 Initialise(); 186 } else { 131 } else { 187 G4ExceptionDescription ed; << 132 G4cout << "### G4BGGPionElasticXS WARNING: is not applicable to " 188 ed << "This BGG cross section is applicabl << 133 << p.GetParticleName() 189 << p.GetParticleName() << G4endl; << 134 << G4endl; 190 G4Exception("G4BGGPionElasticXS::BuildPhys << 191 FatalException, ed); << 192 } 135 } 193 } 136 } 194 137 195 //....oooOO0OOooo........oooOO0OOooo........oo 138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 196 139 197 void G4BGGPionElasticXS::Initialise() << 140 void G4BGGPionElasticXS::DumpPhysicsTable(const G4ParticleDefinition&) >> 141 { >> 142 G4cout << "G4BGGPionElasticXS:"<<G4endl; >> 143 } >> 144 >> 145 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... >> 146 >> 147 void G4BGGPionElasticXS::Initialise() 198 { 148 { 199 theA[0] = theA[1] = 1; << 149 if(isInitialized) return; >> 150 isInitialized = true; >> 151 >> 152 fPion = new G4UPiNuclearCrossSection(); >> 153 fGlauber = new G4GlauberGribovCrossSection(); >> 154 fHadron = new G4HadronNucleonXsc(); >> 155 fPion->BuildPhysicsTable(*particle); >> 156 fGlauber->BuildPhysicsTable(*particle); >> 157 if(particle == G4PionPlus::PionPlus()) isPiplus = true; >> 158 >> 159 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle); 200 G4ThreeVector mom(0.0,0.0,1.0); 160 G4ThreeVector mom(0.0,0.0,1.0); 201 G4DynamicParticle dp(thePiPlus, mom, fGlaube << 161 G4DynamicParticle dp(part, mom, fGlauberEnergy); 202 162 203 G4NistManager* nist = G4NistManager::Instanc 163 G4NistManager* nist = G4NistManager::Instance(); 204 164 205 G4double csup, csdn; << 165 G4double A, csup, csdn; 206 for (G4int iz=2; iz<93; ++iz) { << 207 166 208 G4int A = G4lrint(nist->GetAtomicMassAmu(i << 167 if(verboseLevel > 0) G4cout << "### G4BGGPionElasticXS::Initialise for " 209 theA[iz] = A; << 168 << particle->GetParticleName() << G4endl; 210 169 211 csup = fGlauber->GetElasticGlauberGribov(& << 170 for(G4int iz=2; iz<93; iz++) { 212 csdn = fPion->GetElasticCrossSection(&dp, << 213 theGlauberFacPiPlus[iz] = csdn/csup; << 214 } << 215 171 216 dp.SetDefinition(G4PionMinus::PionMinus()); << 172 G4double Z = G4double(iz); 217 for (G4int iz=2; iz<93; ++iz) { << 173 A = nist->GetAtomicMassAmu(iz); 218 csup = fGlauber->GetElasticGlauberGribov(& << 174 219 csdn = fPion->GetElasticCrossSection(&dp, << 175 csup = fGlauber->GetElasticGlauberGribov(&dp, Z, A); 220 theGlauberFacPiMinus[iz] = csdn/csup; << 176 csdn = fPion->GetElasticCrossSection(&dp, Z, A); 221 << 177 222 if (verboseLevel > 1) { << 178 theGlauberFac[iz] = csdn/csup; 223 G4cout << "Z= " << iz << " A= " << the << 179 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A 224 << " factorPiPlus= " << theGlauberFacPi << 180 << " factor= " << theGlauberFac[iz] << G4endl; 225 << " factorPiMinus= " << theGlauberFacP << 226 << G4endl; << 227 } << 228 } 181 } 229 theCoulombFacPiPlus[1] = 1.0; << 230 theCoulombFacPiMinus[1]= 1.0; << 231 dp.SetKineticEnergy(fLowEnergy); 182 dp.SetKineticEnergy(fLowEnergy); 232 dp.SetDefinition(thePiPlus); << 183 fHadron->GetHadronNucleonXscNS(&dp, G4Proton::Proton()); 233 for (G4int iz=2; iz<93; ++iz) { << 184 theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc(); 234 theCoulombFacPiPlus[iz] = fPion->GetElasti << 185 if(isPiplus) { theCoulombFac[1] /= CoulombFactor(fLowEnergy,1.0); } 235 /CoulombFactorPiPlus(fLowEnergy, iz); << 186 236 } << 187 for(G4int iz=2; iz<93; iz++) { 237 dp.SetDefinition(G4PionMinus::PionMinus()); << 188 238 for(G4int iz=2; iz<93; ++iz) { << 189 G4double Z = G4double(iz); 239 theCoulombFacPiMinus[iz] = fPion->GetElast << 190 A = nist->GetAtomicMassAmu(iz); 240 /FactorPiMinus(fLowEnergy); << 191 241 << 192 theCoulombFac[iz] = fPion->GetElasticCrossSection(&dp, Z, A); 242 if(verboseLevel > 1) { << 193 if(isPiplus) { theCoulombFac[iz] /= CoulombFactor(fLowEnergy,A); } 243 G4cout << "Z= " << iz << " A= " << the << 194 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A 244 << " CoulombFactorPiPlus= " << theCoulo << 195 << " factor= " << theCoulombFac[iz] << G4endl; 245 << " CoulombFactorPiMinus= " << theCoul << 246 << G4endl; << 247 } << 248 } 196 } 249 } 197 } 250 198 251 //....oooOO0OOooo........oooOO0OOooo........oo 199 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 252 200 253 G4double G4BGGPionElasticXS::CoulombFactorPiPl << 201 G4double G4BGGPionElasticXS::CoulombFactor(G4double kinEnergy, G4double A) 254 { 202 { 255 return (kinEnergy > 0.0) ? << 203 G4double res= 0.0; 256 G4NuclearRadii::CoulombFactor(Z, theA[Z], << 204 if(kinEnergy <= DBL_MIN) return res; 257 } << 205 else if(A < 1.5) return kinEnergy*kinEnergy; >> 206 >> 207 G4double elog = std::log10(kinEnergy/GeV); 258 208 259 //....oooOO0OOooo........oooOO0OOooo........oo << 209 // from G4ProtonInelasticCrossSection >> 210 G4double f1 = 8.0 - 8.0/A - 0.008*A; >> 211 G4double f2 = 2.34 - 5.4/A - 0.0028*A; 260 212 261 G4double G4BGGPionElasticXS::FactorPiMinus(G4d << 213 res = 1.0/(1.0 + std::exp(-f1*(elog + f2))); 262 { << 214 263 return 1.0/std::sqrt(kinEnergy); << 215 f1 = 5.6 - 0.016*A; >> 216 f2 = 1.37 + 1.37/A; >> 217 res *= ( 1.0 + (0.8 + 18./A - 0.002*A)/(1.0 + std::exp(f1*(elog + f2)))); >> 218 return res; 264 } 219 } 265 220 266 //....oooOO0OOooo........oooOO0OOooo........oo 221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 267 222 268 void << 269 G4BGGPionElasticXS::CrossSectionDescription(st << 270 { << 271 outFile << "The Barashenkov-Glauber-Gribov c << 272 << "scattering of pions from nuclei << 273 << "Barashenkov parameterization is << 274 << "Glauber-Gribov parameterization << 275 } << 276 223 277 //....oooOO0OOooo........oooOO0OOooo........oo << 278 224