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25 // 25 //
>> 26 // $Id$
>> 27 //
26 // ------------------------------------------- 28 // -------------------------------------------------------------------
27 // 29 //
28 // GEANT4 Class file 30 // GEANT4 Class file
29 // 31 //
30 // 32 //
31 // File name: G4BGGPionInelasticXS 33 // File name: G4BGGPionInelasticXS
32 // 34 //
33 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
34 // 36 //
35 // Creation date: 01.10.2003 37 // Creation date: 01.10.2003
36 // Modifications: 38 // Modifications:
37 // 39 //
38 // ------------------------------------------- 40 // -------------------------------------------------------------------
39 // 41 //
40 42
41 #include "G4BGGPionInelasticXS.hh" 43 #include "G4BGGPionInelasticXS.hh"
42 #include "G4SystemOfUnits.hh" 44 #include "G4SystemOfUnits.hh"
43 #include "G4ComponentGGHadronNucleusXsc.hh" << 45 #include "G4GlauberGribovCrossSection.hh"
44 #include "G4UPiNuclearCrossSection.hh" 46 #include "G4UPiNuclearCrossSection.hh"
45 #include "G4HadronNucleonXsc.hh" 47 #include "G4HadronNucleonXsc.hh"
46 #include "G4NuclearRadii.hh" << 48 //#include "G4HadronInelasticDataSet.hh"
>> 49 #include "G4ComponentSAIDTotalXS.hh"
47 50
48 #include "G4Proton.hh" 51 #include "G4Proton.hh"
49 #include "G4PionPlus.hh" 52 #include "G4PionPlus.hh"
50 #include "G4PionMinus.hh" 53 #include "G4PionMinus.hh"
51 #include "G4NistManager.hh" 54 #include "G4NistManager.hh"
52 #include "G4Pow.hh" <<
53 #include "G4HadronicParameters.hh" <<
54 55
55 G4double G4BGGPionInelasticXS::theGlauberFacPi <<
56 G4double G4BGGPionInelasticXS::theGlauberFacPi <<
57 G4double G4BGGPionInelasticXS::theLowEPiPlus[9 <<
58 G4double G4BGGPionInelasticXS::theLowEPiMinus[ <<
59 G4int G4BGGPionInelasticXS::theA[93] = {0}; <<
60 56
61 G4BGGPionInelasticXS::G4BGGPionInelasticXS(con 57 G4BGGPionInelasticXS::G4BGGPionInelasticXS(const G4ParticleDefinition* p)
62 : G4VCrossSectionDataSet("BarashenkovGlauberG << 58 : G4VCrossSectionDataSet("Barashenkov-Glauber-Gribov")
63 { 59 {
64 verboseLevel = 0; 60 verboseLevel = 0;
65 fGlauberEnergy = 91.*CLHEP::GeV; << 61 fGlauberEnergy = 91.*GeV;
66 fLowEnergy = 20.*CLHEP::MeV; << 62 fLowEnergy = 20.*MeV;
67 fLowestEnergy = 1.*CLHEP::MeV; << 63 fSAIDHighEnergyLimit = 2.6*GeV;
68 SetMinKinEnergy(0.0); 64 SetMinKinEnergy(0.0);
69 SetMaxKinEnergy( G4HadronicParameters::Insta << 65 SetMaxKinEnergy(100*TeV);
70 <<
71 fPion = new G4UPiNuclearCrossSection(); <<
72 fGlauber = new G4ComponentGGHadronNucleusXsc <<
73 fHadron = new G4HadronNucleonXsc(); <<
74 <<
75 fG4pow = G4Pow::GetInstance(); <<
76 <<
77 theProton = G4Proton::Proton(); <<
78 thePiPlus = G4PionPlus::PionPlus(); <<
79 isPiplus = (p == thePiPlus); <<
80 SetForAllAtomsAndEnergies(true); <<
81 66
82 if (0 == theA[0]) { Initialise(); } << 67 for (G4int i = 0; i < 93; i++) {
>> 68 theGlauberFac[i] = 0.0;
>> 69 theCoulombFac[i] = 0.0;
>> 70 theA[i] = 1;
>> 71 }
>> 72 fPion = 0;
>> 73 fGlauber = 0;
>> 74 fHadron = 0;
>> 75 // fGHEISHA = 0;
>> 76 fSAID = 0;
>> 77 particle = p;
>> 78 theProton= G4Proton::Proton();
>> 79 isPiplus = false;
>> 80 isInitialized = false;
83 } 81 }
84 82
85 //....oooOO0OOooo........oooOO0OOooo........oo <<
86 83
87 G4BGGPionInelasticXS::~G4BGGPionInelasticXS() 84 G4BGGPionInelasticXS::~G4BGGPionInelasticXS()
88 { 85 {
>> 86 delete fGlauber;
>> 87 delete fPion;
89 delete fHadron; 88 delete fHadron;
>> 89 delete fSAID;
90 } 90 }
91 91
92 //....oooOO0OOooo........oooOO0OOooo........oo 92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93 93
94 G4bool 94 G4bool
95 G4BGGPionInelasticXS::IsElementApplicable(cons 95 G4BGGPionInelasticXS::IsElementApplicable(const G4DynamicParticle*, G4int,
96 cons << 96 const G4Material*)
97 { 97 {
98 return true; 98 return true;
99 } 99 }
100 100
101 //....oooOO0OOooo........oooOO0OOooo........oo 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
102 102
103 G4bool G4BGGPionInelasticXS::IsIsoApplicable(c 103 G4bool G4BGGPionInelasticXS::IsIsoApplicable(const G4DynamicParticle*,
104 G << 104 G4int Z, G4int A,
105 c << 105 const G4Element*,
106 c << 106 const G4Material*)
107 { 107 {
108 return (1 == Z); << 108 return (1 == Z && 2 >= A);
109 } 109 }
110 110
111 //....oooOO0OOooo........oooOO0OOooo........oo 111 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
112 112
113 G4double 113 G4double
114 G4BGGPionInelasticXS::GetElementCrossSection(c 114 G4BGGPionInelasticXS::GetElementCrossSection(const G4DynamicParticle* dp,
115 G << 115 G4int ZZ, const G4Material*)
116 { 116 {
117 // this method should be called only for Z > 117 // this method should be called only for Z > 1
118 118
119 G4double cross = 0.0; 119 G4double cross = 0.0;
120 G4double ekin = std::max(dp->GetKineticEnerg << 120 G4double ekin = dp->GetKineticEnergy();
121 G4int Z = std::min(ZZ, 92); << 121 G4int Z = ZZ;
122 <<
123 if(1 == Z) { 122 if(1 == Z) {
124 cross = 1.0115*GetIsoCrossSection(dp,1,1); 123 cross = 1.0115*GetIsoCrossSection(dp,1,1);
125 } else if(ekin < fLowEnergy) { <<
126 cross = (isPiplus) ? theLowEPiPlus[Z]*Coul <<
127 : theLowEPiMinus[Z]*FactorPiMinus(ekin); <<
128 } else if(ekin > fGlauberEnergy) { <<
129 cross = (isPiplus) ? theGlauberFacPiPlus[Z <<
130 cross *= fGlauber->GetInelasticGlauberGrib <<
131 } else { 124 } else {
132 cross = fPion->GetInelasticCrossSection(dp << 125 if(Z > 92) { Z = 92; }
>> 126
>> 127 if(ekin <= fLowEnergy && !isPiplus) {
>> 128 cross = theCoulombFac[Z];
>> 129 } else if(ekin <= 2*MeV && isPiplus) {
>> 130 cross = theCoulombFac[Z]*CoulombFactor(ekin, Z);
>> 131 } else if(ekin > fGlauberEnergy) {
>> 132 cross = theGlauberFac[Z]*fGlauber->GetInelasticGlauberGribov(dp, Z, theA[Z]);
>> 133 } else {
>> 134 cross = fPion->GetInelasticCrossSection(dp, Z, theA[Z]);
>> 135 }
133 } 136 }
134 #ifdef G4VERBOSE <<
135 if(verboseLevel > 1) { 137 if(verboseLevel > 1) {
136 G4cout << "G4BGGPionInelasticXS::GetCrossS 138 G4cout << "G4BGGPionInelasticXS::GetCrossSection for "
137 << dp->GetDefinition()->GetParticle << 139 << dp->GetDefinition()->GetParticleName()
138 << " Ekin(GeV)= " << dp->GetKineti << 140 << " Ekin(GeV)= " << dp->GetKineticEnergy()
139 << " in nucleus Z= " << Z << " A= << 141 << " in nucleus Z= " << Z << " A= " << theA[Z]
140 << " XS(b)= " << cross/barn << 142 << " XS(b)= " << cross/barn
141 << G4endl; << 143 << G4endl;
142 } 144 }
143 #endif <<
144 return cross; 145 return cross;
145 } 146 }
146 147
147 //....oooOO0OOooo........oooOO0OOooo........oo 148 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
148 149
149 G4double 150 G4double
150 G4BGGPionInelasticXS::GetIsoCrossSection(const 151 G4BGGPionInelasticXS::GetIsoCrossSection(const G4DynamicParticle* dp,
151 G4int << 152 G4int Z, G4int A,
152 const << 153 const G4Isotope*,
153 const << 154 const G4Element*,
154 const << 155 const G4Material*)
155 { 156 {
156 // this method should be called only for Z = 157 // this method should be called only for Z = 1
157 fHadron->HadronNucleonXscNS(dp->GetDefinitio <<
158 dp->GetKineticEn <<
159 G4double cross = A*fHadron->GetInelasticHadr <<
160 158
161 #ifdef G4VERBOSE << 159 G4double cross = 0.0;
>> 160 G4double ekin = dp->GetKineticEnergy();
>> 161
>> 162 if(ekin <= fSAIDHighEnergyLimit) {
>> 163 cross = fSAID->GetInelasticIsotopeCrossSection(particle, ekin, 1, 1);
>> 164 } else {
>> 165 fHadron->GetHadronNucleonXscPDG(dp, theProton);
>> 166 cross = (theCoulombFac[1]/ekin + 1)*fHadron->GetInelasticHadronNucleonXsc();
>> 167 }
>> 168 /*
>> 169 if(isPiplus) {
>> 170 if(ekin <= 20*GeV) {
>> 171 cross = theCoulombFac[1]*fGHEISHA->GetElementCrossSection(dp, 1, mat);
>> 172 } else {
>> 173 fHadron->GetHadronNucleonXscPDG(dp, theProton);
>> 174 cross = fHadron->GetInelasticHadronNucleonXsc();
>> 175 }
>> 176 } else {
>> 177 if(ekin <= fLowEnergy) {
>> 178 cross = theCoulombFac[1];
>> 179 } else if(ekin <= 20*GeV) {
>> 180 fHadron->GetHadronNucleonXscNS(dp, theProton);
>> 181 cross = theGlauberFac[1]*fHadron->GetInelasticHadronNucleonXsc();
>> 182 } else {
>> 183 fHadron->GetHadronNucleonXscPDG(dp, theProton);
>> 184 cross = fHadron->GetInelasticHadronNucleonXsc();
>> 185 }
>> 186 }
>> 187 */
>> 188 cross *= A;
>> 189
162 if(verboseLevel > 1) { 190 if(verboseLevel > 1) {
163 G4cout << "G4BGGPionInelasticXS::GetCrossS 191 G4cout << "G4BGGPionInelasticXS::GetCrossSection for "
164 << dp->GetDefinition()->GetParticle << 192 << dp->GetDefinition()->GetParticleName()
165 << " Ekin(GeV)= " << dp->GetKineti << 193 << " Ekin(GeV)= " << dp->GetKineticEnergy()
166 << " in nucleus Z=1 A=" << A << 194 << " in nucleus Z= " << Z << " A= " << A
167 << " XS(b)= " << cross/barn << 195 << " XS(b)= " << cross/barn
168 << G4endl; << 196 << G4endl;
169 } 197 }
170 #endif <<
171 return cross; 198 return cross;
172 } 199 }
173 200
174 //....oooOO0OOooo........oooOO0OOooo........oo 201 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
175 202
176 void G4BGGPionInelasticXS::BuildPhysicsTable(c 203 void G4BGGPionInelasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
177 { 204 {
178 if(verboseLevel > 1) { <<
179 G4cout << "G4BGGPionInelasticXS::BuildPhys <<
180 << p.GetParticleName() << G4endl; <<
181 } <<
182 if(&p == G4PionPlus::PionPlus() || &p == G4P 205 if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
183 isPiplus = (&p == G4PionPlus::PionPlus()); << 206 particle = &p;
184 } else { 207 } else {
185 G4ExceptionDescription ed; << 208 G4cout << "### G4BGGPionInelasticXS WARNING: is not applicable to "
186 ed << "This BGG cross section is applicabl << 209 << p.GetParticleName()
187 << p.GetParticleName() << G4endl; << 210 << G4endl;
188 G4Exception("G4BGGPionInelasticXS::BuildPh << 211 throw G4HadronicException(__FILE__, __LINE__,
189 FatalException, ed); << 212 "G4BGGPionInelasticXS::BuildPhysicsTable is used for wrong particle");
>> 213 return;
190 } 214 }
191 } <<
192 215
193 //....oooOO0OOooo........oooOO0OOooo........oo << 216 if(isInitialized) { return; }
>> 217 isInitialized = true;
194 218
195 void G4BGGPionInelasticXS::Initialise() << 219 fPion = new G4UPiNuclearCrossSection();
196 { << 220 fGlauber = new G4GlauberGribovCrossSection();
197 theA[0] = theA[1] = 1; << 221 fHadron = new G4HadronNucleonXsc();
>> 222 // fGHEISHA = new G4HadronInelasticDataSet();
>> 223 fSAID = new G4ComponentSAIDTotalXS();
>> 224
>> 225 fPion->BuildPhysicsTable(*particle);
>> 226 fGlauber->BuildPhysicsTable(*particle);
>> 227 if(particle == G4PionPlus::PionPlus()) { isPiplus = true; }
>> 228
>> 229 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
198 G4ThreeVector mom(0.0,0.0,1.0); 230 G4ThreeVector mom(0.0,0.0,1.0);
199 G4DynamicParticle dp(thePiPlus, mom, fGlaube << 231 G4DynamicParticle dp(part, mom, fGlauberEnergy);
200 232
201 G4NistManager* nist = G4NistManager::Instanc 233 G4NistManager* nist = G4NistManager::Instance();
>> 234
202 G4double csup, csdn; 235 G4double csup, csdn;
>> 236 G4int A;
>> 237
>> 238 if(verboseLevel > 0) {
>> 239 G4cout << "### G4BGGPionInelasticXS::Initialise for "
>> 240 << particle->GetParticleName()
>> 241 << " isPiplus: " << isPiplus
>> 242 << G4endl;
>> 243 }
>> 244
>> 245 for(G4int iz=2; iz<93; iz++) {
203 246
204 for (G4int iz=2; iz<93; ++iz) { << 247 A = G4lrint(nist->GetAtomicMassAmu(iz));
205 G4int A = G4lrint(nist->GetAtomicMassAmu(i <<
206 theA[iz] = A; 248 theA[iz] = A;
207 249
208 csup = fGlauber->GetInelasticGlauberGribov 250 csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, A);
209 csdn = fPion->GetInelasticCrossSection(&dp <<
210 theGlauberFacPiPlus[iz] = csdn/csup; <<
211 } <<
212 <<
213 dp.SetDefinition(G4PionMinus::PionMinus()); <<
214 for (G4int iz=2; iz<93; ++iz) { <<
215 csup = fGlauber->GetInelasticGlauberGribov <<
216 csdn = fPion->GetInelasticCrossSection(&dp 251 csdn = fPion->GetInelasticCrossSection(&dp, iz, theA[iz]);
217 theGlauberFacPiMinus[iz] = csdn/csup; <<
218 252
219 if(verboseLevel > 1) { << 253 theGlauberFac[iz] = csdn/csup;
220 G4cout << "Z= " << iz << " A= " << the << 254 if(verboseLevel > 0) {
221 << " factorPiPlus= " << theGlauberFacPi << 255 G4cout << "Z= " << iz << " A= " << A
222 << " factorPiMinus= " << theGlauberFacP << 256 << " factor= " << theGlauberFac[iz] << G4endl;
223 << G4endl; <<
224 } 257 }
225 } 258 }
226 << 259 dp.SetKineticEnergy(fSAIDHighEnergyLimit);
227 theLowEPiPlus[1] = theLowEPiMinus[1]= 1.0; << 260 fHadron->GetHadronNucleonXscPDG(&dp, theProton);
228 dp.SetDefinition(thePiPlus); << 261 theCoulombFac[1] = fSAIDHighEnergyLimit*
229 dp.SetKineticEnergy(fLowEnergy); << 262 (fSAID->GetInelasticIsotopeCrossSection(particle,fSAIDHighEnergyLimit,1,1)
230 for (G4int iz=2; iz<93; ++iz) { << 263 /fHadron->GetInelasticHadronNucleonXsc() - 1);
231 theLowEPiPlus[iz] = fPion->GetInelasticCro << 264
232 /CoulombFactorPiPlus(fLowEnergy, iz); << 265 /*
>> 266 dp.SetKineticEnergy(20*GeV);
>> 267 const G4Material* mat = 0;
>> 268 if(isPiplus) {
>> 269 fHadron->GetHadronNucleonXscPDG(&dp, theProton);
>> 270 theCoulombFac[1] = fHadron->GetInelasticHadronNucleonXsc()
>> 271 /fGHEISHA->GetElementCrossSection(&dp, 1, mat);
>> 272 } else {
>> 273 fHadron->GetHadronNucleonXscPDG(&dp, theProton);
>> 274 theGlauberFac[1] = fHadron->GetInelasticHadronNucleonXsc();
>> 275 fHadron->GetHadronNucleonXscNS(&dp, theProton);
>> 276 theGlauberFac[1] /= fHadron->GetInelasticHadronNucleonXsc();
233 } 277 }
>> 278 */
>> 279 if(isPiplus) {
>> 280 dp.SetKineticEnergy(2*MeV);
>> 281 for(G4int iz=2; iz<93; iz++) {
>> 282 theCoulombFac[iz] = fPion->GetInelasticCrossSection(&dp, iz, theA[iz])
>> 283 /CoulombFactor(2*MeV,iz);
>> 284 }
234 285
235 dp.SetDefinition(G4PionMinus::PionMinus()); << 286 } else {
236 for (G4int iz=2; iz<93; ++iz) { << 287 dp.SetKineticEnergy(fLowEnergy);
237 theLowEPiMinus[iz] = fPion->GetInelasticCr << 288 //fHadron->GetHadronNucleonXscNS(&dp, theProton);
238 /FactorPiMinus(fLowEnergy); << 289 //theCoulombFac[1] = theGlauberFac[1]*fHadron->GetInelasticHadronNucleonXsc();
239 << 290 for(G4int iz=2; iz<93; iz++) {
240 if (verboseLevel > 1) { << 291 theCoulombFac[iz] = fPion->GetInelasticCrossSection(&dp, iz, theA[iz]);
241 G4cout << "Z= " << iz << " A= " << the <<
242 << " LowEtorPiPlus= " << theLowEPiPlus[ <<
243 << " LowEtorPiMinus= " << theLowEPiMinu <<
244 << G4endl; <<
245 } 292 }
246 } 293 }
247 } 294 }
248 295
249 //....oooOO0OOooo........oooOO0OOooo........oo 296 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
250 297
251 G4double G4BGGPionInelasticXS::CoulombFactorPi << 298 G4double G4BGGPionInelasticXS::CoulombFactor(G4double kinEnergy, G4int Z)
252 { <<
253 return (kinEnergy > 0.0) ? <<
254 G4NuclearRadii::CoulombFactor(Z, theA[Z], <<
255 } <<
256 <<
257 //....oooOO0OOooo........oooOO0OOooo........oo <<
258 <<
259 G4double G4BGGPionInelasticXS::FactorPiMinus(G <<
260 { 299 {
261 return 1.0/std::sqrt(kinEnergy); << 300 G4int A = theA[Z];
>> 301 G4double res= 0.0;
>> 302 if(kinEnergy <= DBL_MIN) { return res; }
>> 303 else if(A < 2) { return kinEnergy*kinEnergy; }
>> 304
>> 305 G4double elog = std::log10(6.7*kinEnergy/GeV);
>> 306 G4double aa = A;
>> 307
>> 308 // from G4ProtonInelasticCrossSection
>> 309 G4double ff1 = 0.70 - 0.002*aa; // slope of the drop at medium energies.
>> 310 G4double ff2 = 1.00 + 1/aa; // start of the slope.
>> 311 G4double ff3 = 0.8 + 18/aa - 0.002*aa; // stephight
>> 312 res = 1.0 + ff3*(1.0 - (1.0/(1+std::exp(-8*ff1*(elog + 1.37*ff2)))));
>> 313
>> 314 ff1 = 1. - 1./aa - 0.001*aa; // slope of the rise
>> 315 ff2 = 1.17 - 2.7/aa-0.0014*aa; // start of the rise
>> 316 res /= (1 + std::exp(-8.*ff1*(elog + 2*ff2)));
>> 317 /*
>> 318 G4double f1 = 8.0 - 8.0/aa - 0.008*aa;
>> 319 G4double f2 = 2.34 - 5.4/aa - 0.0028*aa;
>> 320
>> 321 res = 1.0/(1.0 + std::exp(-f1*(elog + f2)));
>> 322
>> 323 f1 = 5.6 - 0.016*aa;
>> 324 f2 = 1.37 + 1.37/aa;
>> 325 res *= ( 1.0 + (0.8 + 18./aa - 0.002*aa)/(1.0 + std::exp(f1*(elog + f2))));
>> 326 */
>> 327 return res;
262 } 328 }
263 329
264 //....oooOO0OOooo........oooOO0OOooo........oo 330 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
265 331
266 void 332 void
267 G4BGGPionInelasticXS::CrossSectionDescription( 333 G4BGGPionInelasticXS::CrossSectionDescription(std::ostream& outFile) const
268 { 334 {
269 outFile << "The Barashenkov-Glauber-Gribov c 335 outFile << "The Barashenkov-Glauber-Gribov cross section handles inelastic\n"
270 << "pion scattering from nuclei at a 336 << "pion scattering from nuclei at all energies. The Barashenkov\n"
271 << "parameterization is used below 9 337 << "parameterization is used below 91 GeV and the Glauber-Gribov\n"
272 << "parameterization is used above 9 338 << "parameterization is used above 91 GeV.\n";
273 } 339 }
274 340
275 //....oooOO0OOooo........oooOO0OOooo........oo 341 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
276 342