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25 // 25 //
>> 26 // $Id$
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4BGGPionElasticXS 33 // File name: G4BGGPionElasticXS
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 01.10.2003 37 // Creation date: 01.10.2003
37 // Modifications: 38 // Modifications:
38 // 39 //
39 // ------------------------------------------- 40 // -------------------------------------------------------------------
40 // 41 //
41 42
42 #include "G4BGGPionElasticXS.hh" 43 #include "G4BGGPionElasticXS.hh"
43 #include "G4SystemOfUnits.hh" 44 #include "G4SystemOfUnits.hh"
44 #include "G4ComponentGGHadronNucleusXsc.hh" << 45 #include "G4GlauberGribovCrossSection.hh"
45 #include "G4UPiNuclearCrossSection.hh" 46 #include "G4UPiNuclearCrossSection.hh"
46 #include "G4HadronNucleonXsc.hh" 47 #include "G4HadronNucleonXsc.hh"
47 #include "G4NuclearRadii.hh" << 48 #include "G4ComponentSAIDTotalXS.hh"
48 <<
49 #include "G4Proton.hh" 49 #include "G4Proton.hh"
50 #include "G4PionPlus.hh" 50 #include "G4PionPlus.hh"
51 #include "G4PionMinus.hh" 51 #include "G4PionMinus.hh"
52 #include "G4NistManager.hh" 52 #include "G4NistManager.hh"
53 #include "G4HadronicParameters.hh" <<
54 #include "G4Pow.hh" <<
55 <<
56 G4double G4BGGPionElasticXS::theGlauberFacPiPl <<
57 G4double G4BGGPionElasticXS::theCoulombFacPiPl <<
58 G4double G4BGGPionElasticXS::theGlauberFacPiMi <<
59 G4double G4BGGPionElasticXS::theCoulombFacPiMi <<
60 G4int G4BGGPionElasticXS::theA[93] = {0}; <<
61 53
62 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
63 55
64 G4BGGPionElasticXS::G4BGGPionElasticXS(const G << 56 G4BGGPionElasticXS::G4BGGPionElasticXS(const G4ParticleDefinition*)
65 : G4VCrossSectionDataSet("BarashenkovGlauberG << 57 : G4VCrossSectionDataSet("Barashenkov-Glauber")
66 { 58 {
67 verboseLevel = 0; 59 verboseLevel = 0;
68 fGlauberEnergy = 91.*CLHEP::GeV; << 60 fGlauberEnergy = 91.*GeV;
69 fLowEnergy = 20.*CLHEP::MeV; << 61 fLowEnergy = 20.*MeV;
70 fLowestEnergy = 1.*CLHEP::MeV; << 62 fSAIDHighEnergyLimit = 2.6*GeV;
71 SetMinKinEnergy(0.0); 63 SetMinKinEnergy(0.0);
72 SetMaxKinEnergy( G4HadronicParameters::Insta << 64 SetMaxKinEnergy(100*TeV);
73 <<
74 fPion = new G4UPiNuclearCrossSection(); <<
75 fGlauber = new G4ComponentGGHadronNucleusXsc <<
76 fHadron = new G4HadronNucleonXsc(); <<
77 <<
78 fG4pow = G4Pow::GetInstance(); <<
79 65
80 theProton = G4Proton::Proton(); << 66 for (G4int i = 0; i < 93; i++) {
81 thePiPlus = G4PionPlus::PionPlus(); << 67 theGlauberFac[i] = 0.0;
82 isPiplus = (p == thePiPlus); << 68 theCoulombFac[i] = 0.0;
83 SetForAllAtomsAndEnergies(true); << 69 theA[i] = 1;
84 << 70 }
85 if (0 == theA[0]) { Initialise(); } << 71 fPion = 0;
>> 72 fGlauber = 0;
>> 73 fHadron = 0;
>> 74 fSAID = 0;
>> 75 particle = 0;
>> 76 theProton= G4Proton::Proton();
>> 77 isPiplus = false;
>> 78 isInitialized = false;
86 } 79 }
87 80
88 //....oooOO0OOooo........oooOO0OOooo........oo 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
89 82
90 G4BGGPionElasticXS::~G4BGGPionElasticXS() 83 G4BGGPionElasticXS::~G4BGGPionElasticXS()
91 { 84 {
>> 85 delete fGlauber;
>> 86 delete fPion;
92 delete fHadron; 87 delete fHadron;
>> 88 delete fSAID;
93 } 89 }
94 90
95 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
96 92
97 G4bool 93 G4bool
98 G4BGGPionElasticXS::IsElementApplicable(const 94 G4BGGPionElasticXS::IsElementApplicable(const G4DynamicParticle*, G4int,
99 const << 95 const G4Material*)
100 { 96 {
101 return true; 97 return true;
102 } 98 }
103 99
104 //....oooOO0OOooo........oooOO0OOooo........oo 100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
105 101
106 G4bool G4BGGPionElasticXS::IsIsoApplicable(con 102 G4bool G4BGGPionElasticXS::IsIsoApplicable(const G4DynamicParticle*,
107 G4i << 103 G4int Z, G4int A,
108 con << 104 const G4Element*,
>> 105 const G4Material*)
109 { 106 {
110 return (1 == Z); << 107 return (1 == Z && 2 >= A);
111 } 108 }
112 109
113 //....oooOO0OOooo........oooOO0OOooo........oo 110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
114 111
115 G4double 112 G4double
116 G4BGGPionElasticXS::GetElementCrossSection(con 113 G4BGGPionElasticXS::GetElementCrossSection(const G4DynamicParticle* dp,
117 G4i << 114 G4int ZZ, const G4Material*)
118 { 115 {
119 // this method should be called only for Z > 116 // this method should be called only for Z > 1
>> 117
120 G4double cross = 0.0; 118 G4double cross = 0.0;
121 G4double ekin = std::max(dp->GetKineticEnerg << 119 G4double ekin = dp->GetKineticEnergy();
122 G4int Z = std::min(ZZ, 92); << 120 G4int Z = ZZ;
123 if(1 == Z) { 121 if(1 == Z) {
124 cross = 1.0115*GetIsoCrossSection(dp,1,1); 122 cross = 1.0115*GetIsoCrossSection(dp,1,1);
125 } else { 123 } else {
>> 124 if(Z > 92) { Z = 92; }
>> 125
126 if(ekin <= fLowEnergy) { 126 if(ekin <= fLowEnergy) {
127 cross = (isPiplus) ? theCoulombFacPiPlus << 127 cross = theCoulombFac[Z];
128 : theCoulombFacPiMinus[Z]*FactorPiMinu <<
129 } else if(ekin > fGlauberEnergy) { 128 } else if(ekin > fGlauberEnergy) {
130 cross = (isPiplus) ? theGlauberFacPiPlus << 129 cross = theGlauberFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, theA[Z]);
131 cross *= fGlauber->GetElasticGlauberGrib <<
132 } else { 130 } else {
133 cross = fPion->GetElasticCrossSection(dp 131 cross = fPion->GetElasticCrossSection(dp, Z, theA[Z]);
134 } 132 }
135 } 133 }
136 #ifdef G4VERBOSE <<
137 if(verboseLevel > 1) { 134 if(verboseLevel > 1) {
138 G4cout << "G4BGGPionElasticXS::GetElementC 135 G4cout << "G4BGGPionElasticXS::GetElementCrossSection for "
139 << dp->GetDefinition()->GetParticle << 136 << dp->GetDefinition()->GetParticleName()
140 << " Ekin(GeV)= " << dp->GetKineti << 137 << " Ekin(GeV)= " << dp->GetKineticEnergy()
141 << " in nucleus Z= " << Z << " A= << 138 << " in nucleus Z= " << Z << " A= " << theA[Z]
142 << " XS(b)= " << cross/barn << 139 << " XS(b)= " << cross/barn
143 << G4endl; << 140 << G4endl;
144 } 141 }
145 #endif <<
146 return cross; 142 return cross;
147 } 143 }
148 144
149 //....oooOO0OOooo........oooOO0OOooo........oo <<
150 <<
151 G4double 145 G4double
152 G4BGGPionElasticXS::GetIsoCrossSection(const G 146 G4BGGPionElasticXS::GetIsoCrossSection(const G4DynamicParticle* dp,
153 G4int, << 147 G4int Z, G4int A,
154 const G << 148 const G4Isotope*,
155 const G << 149 const G4Element*,
156 const G << 150 const G4Material*)
157 { 151 {
158 // this method should be called only for Z = 152 // this method should be called only for Z = 1
159 fHadron->HadronNucleonXscNS(dp->GetDefinitio <<
160 dp->GetKineticEn <<
161 G4double cross = A*fHadron->GetElasticHadron <<
162 153
163 #ifdef G4VERBOSE << 154 G4double cross = 0.0;
>> 155 G4double ekin = dp->GetKineticEnergy();
>> 156
>> 157 if(ekin <= fSAIDHighEnergyLimit) {
>> 158 cross = fSAID->GetElasticIsotopeCrossSection(particle, ekin, 1, 1);
>> 159 } else {
>> 160 fHadron->GetHadronNucleonXscPDG(dp, theProton);
>> 161 cross = theCoulombFac[1]*fHadron->GetElasticHadronNucleonXsc();
>> 162 }
>> 163 cross *= A;
>> 164 /*
>> 165 if(ekin <= fLowEnergy) {
>> 166 cross = theCoulombFac[1];
>> 167
>> 168 } else if( A < 2) {
>> 169 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 170 cross = fHadron->GetElasticHadronNucleonXsc();
>> 171 } else {
>> 172 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 173 cross = fHadron->GetElasticHadronNucleonXsc();
>> 174 fHadron->GetHadronNucleonXscNS(dp, G4Neutron::Neutron());
>> 175 cross += fHadron->GetElasticHadronNucleonXsc();
>> 176 }
>> 177 */
164 if(verboseLevel > 1) { 178 if(verboseLevel > 1) {
165 G4cout << "G4BGGPionElasticXS::GetIsoCross 179 G4cout << "G4BGGPionElasticXS::GetIsoCrossSection for "
166 << dp->GetDefinition()->GetParticle << 180 << dp->GetDefinition()->GetParticleName()
167 << " Ekin(GeV)= " << dp->GetKineti << 181 << " Ekin(GeV)= " << dp->GetKineticEnergy()
168 << " in nucleus Z=1 A=" << A << 182 << " in nucleus Z= " << Z << " A= " << A
169 << " XS(b)= " << cross/barn << 183 << " XS(b)= " << cross/barn
170 << G4endl; << 184 << G4endl;
171 } 185 }
172 #endif <<
173 return cross; 186 return cross;
174 } 187 }
175 188
176 //....oooOO0OOooo........oooOO0OOooo........oo 189 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
177 190
178 void G4BGGPionElasticXS::BuildPhysicsTable(con 191 void G4BGGPionElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
179 { 192 {
180 if(verboseLevel > 1) { <<
181 G4cout << "G4BGGPionElasticXS::BuildPhysic <<
182 << p.GetParticleName() << G4endl; <<
183 } <<
184 if(&p == G4PionPlus::PionPlus() || &p == G4P 193 if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
185 isPiplus = (&p == G4PionPlus::PionPlus()); << 194 particle = &p;
186 } else { 195 } else {
187 G4ExceptionDescription ed; << 196 G4cout << "### G4BGGPionElasticXS WARNING: is not applicable to "
188 ed << "This BGG cross section is applicabl << 197 << p.GetParticleName()
189 << p.GetParticleName() << G4endl; << 198 << G4endl;
190 G4Exception("G4BGGPionElasticXS::BuildPhys << 199 throw G4HadronicException(__FILE__, __LINE__,
191 FatalException, ed); << 200 "G4BGGPionElasticXS::BuildPhysicsTable is used for wrong particle");
>> 201 return;
192 } 202 }
193 } <<
194 203
195 //....oooOO0OOooo........oooOO0OOooo........oo << 204 if(isInitialized) { return; }
>> 205 isInitialized = true;
196 206
197 void G4BGGPionElasticXS::Initialise() << 207 fPion = new G4UPiNuclearCrossSection();
198 { << 208 fGlauber = new G4GlauberGribovCrossSection();
199 theA[0] = theA[1] = 1; << 209 fHadron = new G4HadronNucleonXsc();
>> 210 fSAID = new G4ComponentSAIDTotalXS();
>> 211 fPion->BuildPhysicsTable(*particle);
>> 212 fGlauber->BuildPhysicsTable(*particle);
>> 213 if(particle == G4PionPlus::PionPlus()) { isPiplus = true; }
>> 214
>> 215 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
200 G4ThreeVector mom(0.0,0.0,1.0); 216 G4ThreeVector mom(0.0,0.0,1.0);
201 G4DynamicParticle dp(thePiPlus, mom, fGlaube << 217 G4DynamicParticle dp(part, mom, fGlauberEnergy);
202 218
203 G4NistManager* nist = G4NistManager::Instanc 219 G4NistManager* nist = G4NistManager::Instance();
204 220
205 G4double csup, csdn; 221 G4double csup, csdn;
206 for (G4int iz=2; iz<93; ++iz) { << 222 G4int A;
207 223
208 G4int A = G4lrint(nist->GetAtomicMassAmu(i << 224 if(verboseLevel > 0) {
>> 225 G4cout << "### G4BGGPionElasticXS::Initialise for "
>> 226 << particle->GetParticleName() << G4endl;
>> 227 }
>> 228 for(G4int iz=2; iz<93; iz++) {
>> 229
>> 230 A = G4lrint(nist->GetAtomicMassAmu(iz));
209 theA[iz] = A; 231 theA[iz] = A;
210 232
211 csup = fGlauber->GetElasticGlauberGribov(& 233 csup = fGlauber->GetElasticGlauberGribov(&dp, iz, A);
212 csdn = fPion->GetElasticCrossSection(&dp, 234 csdn = fPion->GetElasticCrossSection(&dp, iz, A);
213 theGlauberFacPiPlus[iz] = csdn/csup; <<
214 } <<
215 235
216 dp.SetDefinition(G4PionMinus::PionMinus()); << 236 theGlauberFac[iz] = csdn/csup;
217 for (G4int iz=2; iz<93; ++iz) { << 237 if(verboseLevel > 0) {
218 csup = fGlauber->GetElasticGlauberGribov(& << 238 G4cout << "Z= " << iz << " A= " << A
219 csdn = fPion->GetElasticCrossSection(&dp, << 239 << " factor= " << theGlauberFac[iz] << G4endl;
220 theGlauberFacPiMinus[iz] = csdn/csup; <<
221 <<
222 if (verboseLevel > 1) { <<
223 G4cout << "Z= " << iz << " A= " << the <<
224 << " factorPiPlus= " << theGlauberFacPi <<
225 << " factorPiMinus= " << theGlauberFacP <<
226 << G4endl; <<
227 } 240 }
228 } 241 }
229 theCoulombFacPiPlus[1] = 1.0; << 242 /*
230 theCoulombFacPiMinus[1]= 1.0; <<
231 dp.SetKineticEnergy(fLowEnergy); 243 dp.SetKineticEnergy(fLowEnergy);
232 dp.SetDefinition(thePiPlus); << 244 fHadron->GetHadronNucleonXscNS(&dp, G4Proton::Proton());
233 for (G4int iz=2; iz<93; ++iz) { << 245 theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();
234 theCoulombFacPiPlus[iz] = fPion->GetElasti << 246 */
235 /CoulombFactorPiPlus(fLowEnergy, iz); << 247 dp.SetKineticEnergy(fSAIDHighEnergyLimit);
236 } << 248 fHadron->GetHadronNucleonXscPDG(&dp, theProton);
237 dp.SetDefinition(G4PionMinus::PionMinus()); << 249 theCoulombFac[1] =
238 for(G4int iz=2; iz<93; ++iz) { << 250 fSAID->GetElasticIsotopeCrossSection(particle,fSAIDHighEnergyLimit,1,1)
239 theCoulombFacPiMinus[iz] = fPion->GetElast << 251 /fHadron->GetElasticHadronNucleonXsc();
240 /FactorPiMinus(fLowEnergy); << 252
241 << 253 dp.SetKineticEnergy(fLowEnergy);
242 if(verboseLevel > 1) { << 254 for(G4int iz=2; iz<93; iz++) {
243 G4cout << "Z= " << iz << " A= " << the << 255 theCoulombFac[iz] = fPion->GetElasticCrossSection(&dp, iz, theA[iz]);
244 << " CoulombFactorPiPlus= " << theCoulo << 256 if(verboseLevel > 0) {
245 << " CoulombFactorPiMinus= " << theCoul << 257 G4cout << "Z= " << iz << " A= " << A
246 << G4endl; << 258 << " factor= " << theCoulombFac[iz] << G4endl;
247 } 259 }
248 } 260 }
249 } 261 }
250 262
251 //....oooOO0OOooo........oooOO0OOooo........oo <<
252 <<
253 G4double G4BGGPionElasticXS::CoulombFactorPiPl <<
254 { <<
255 return (kinEnergy > 0.0) ? <<
256 G4NuclearRadii::CoulombFactor(Z, theA[Z], <<
257 } <<
258 <<
259 //....oooOO0OOooo........oooOO0OOooo........oo <<
260 <<
261 G4double G4BGGPionElasticXS::FactorPiMinus(G4d <<
262 { <<
263 return 1.0/std::sqrt(kinEnergy); <<
264 } <<
265 <<
266 //....oooOO0OOooo........oooOO0OOooo........oo <<
267 <<
268 void 263 void
269 G4BGGPionElasticXS::CrossSectionDescription(st 264 G4BGGPionElasticXS::CrossSectionDescription(std::ostream& outFile) const
270 { 265 {
271 outFile << "The Barashenkov-Glauber-Gribov c 266 outFile << "The Barashenkov-Glauber-Gribov cross section handles elastic\n"
272 << "scattering of pions from nuclei 267 << "scattering of pions from nuclei at all energies. The\n"
273 << "Barashenkov parameterization is 268 << "Barashenkov parameterization is used below 91 GeV and the\n"
274 << "Glauber-Gribov parameterization 269 << "Glauber-Gribov parameterization is used above 91 GeV.\n";
275 } 270 }
276 <<
277 //....oooOO0OOooo........oooOO0OOooo........oo <<
278 271