| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 // $Id: G4BGGPionInelasticXS.cc,v 1.11 2010/11/19 08:15:55 gunter Exp $
>> 27 // GEANT4 tag $Name: geant4-09-04 $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class file 31 // GEANT4 Class file
29 // 32 //
30 // 33 //
31 // File name: G4BGGPionInelasticXS 34 // File name: G4BGGPionInelasticXS
32 // 35 //
33 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
34 // 37 //
35 // Creation date: 01.10.2003 38 // Creation date: 01.10.2003
36 // Modifications: 39 // Modifications:
37 // 40 //
38 // ------------------------------------------- 41 // -------------------------------------------------------------------
39 // 42 //
40 43
41 #include "G4BGGPionInelasticXS.hh" 44 #include "G4BGGPionInelasticXS.hh"
42 #include "G4SystemOfUnits.hh" << 45 #include "G4GlauberGribovCrossSection.hh"
43 #include "G4ComponentGGHadronNucleusXsc.hh" <<
44 #include "G4UPiNuclearCrossSection.hh" 46 #include "G4UPiNuclearCrossSection.hh"
45 #include "G4HadronNucleonXsc.hh" 47 #include "G4HadronNucleonXsc.hh"
46 #include "G4NuclearRadii.hh" <<
47 <<
48 #include "G4Proton.hh" <<
49 #include "G4PionPlus.hh" 48 #include "G4PionPlus.hh"
50 #include "G4PionMinus.hh" 49 #include "G4PionMinus.hh"
51 #include "G4NistManager.hh" 50 #include "G4NistManager.hh"
52 #include "G4Pow.hh" <<
53 #include "G4HadronicParameters.hh" <<
54 51
55 G4double G4BGGPionInelasticXS::theGlauberFacPi <<
56 G4double G4BGGPionInelasticXS::theGlauberFacPi <<
57 G4double G4BGGPionInelasticXS::theLowEPiPlus[9 <<
58 G4double G4BGGPionInelasticXS::theLowEPiMinus[ <<
59 G4int G4BGGPionInelasticXS::theA[93] = {0}; <<
60 52
61 G4BGGPionInelasticXS::G4BGGPionInelasticXS(con 53 G4BGGPionInelasticXS::G4BGGPionInelasticXS(const G4ParticleDefinition* p)
62 : G4VCrossSectionDataSet("BarashenkovGlauberG <<
63 { 54 {
64 verboseLevel = 0; 55 verboseLevel = 0;
65 fGlauberEnergy = 91.*CLHEP::GeV; << 56 fGlauberEnergy = 91.*GeV;
66 fLowEnergy = 20.*CLHEP::MeV; << 57 fLowEnergy = 20.*MeV;
67 fLowestEnergy = 1.*CLHEP::MeV; << 58 for (G4int i = 0; i < 93; i++) {
68 SetMinKinEnergy(0.0); << 59 theGlauberFac[i] = 0.0;
69 SetMaxKinEnergy( G4HadronicParameters::Insta << 60 theCoulombFac[i] = 0.0;
70 << 61 }
71 fPion = new G4UPiNuclearCrossSection(); << 62 fPion = 0;
72 fGlauber = new G4ComponentGGHadronNucleusXsc << 63 fGlauber = 0;
73 fHadron = new G4HadronNucleonXsc(); << 64 fHadron = 0;
74 << 65 particle = p;
75 fG4pow = G4Pow::GetInstance(); << 66 isPiplus = false;
76 << 67 isInitialized = false;
77 theProton = G4Proton::Proton(); <<
78 thePiPlus = G4PionPlus::PionPlus(); <<
79 isPiplus = (p == thePiPlus); <<
80 SetForAllAtomsAndEnergies(true); <<
81 <<
82 if (0 == theA[0]) { Initialise(); } <<
83 } 68 }
84 69
85 //....oooOO0OOooo........oooOO0OOooo........oo <<
86 70
87 G4BGGPionInelasticXS::~G4BGGPionInelasticXS() 71 G4BGGPionInelasticXS::~G4BGGPionInelasticXS()
88 { 72 {
>> 73 delete fGlauber;
>> 74 delete fPion;
89 delete fHadron; 75 delete fHadron;
90 } 76 }
91 77
92 //....oooOO0OOooo........oooOO0OOooo........oo <<
93 <<
94 G4bool <<
95 G4BGGPionInelasticXS::IsElementApplicable(cons <<
96 cons <<
97 { <<
98 return true; <<
99 } <<
100 <<
101 //....oooOO0OOooo........oooOO0OOooo........oo <<
102 <<
103 G4bool G4BGGPionInelasticXS::IsIsoApplicable(c <<
104 G <<
105 c <<
106 c <<
107 { <<
108 return (1 == Z); <<
109 } <<
110 <<
111 //....oooOO0OOooo........oooOO0OOooo........oo <<
112 78
113 G4double 79 G4double
114 G4BGGPionInelasticXS::GetElementCrossSection(c << 80 G4BGGPionInelasticXS::GetZandACrossSection(const G4DynamicParticle* dp,
115 G << 81 G4int Z, G4int A, G4double)
116 { 82 {
117 // this method should be called only for Z > <<
118 <<
119 G4double cross = 0.0; 83 G4double cross = 0.0;
120 G4double ekin = std::max(dp->GetKineticEnerg << 84 G4double ekin = dp->GetKineticEnergy();
121 G4int Z = std::min(ZZ, 92); << 85 // G4int iz = G4int(Z);
>> 86 if(Z > 92) Z = 92;
>> 87
>> 88 if(ekin <= fLowEnergy) {
>> 89 cross = theCoulombFac[Z];
>> 90 if(isPiplus) { cross *= CoulombFactor(ekin, A); }
>> 91
>> 92 } else if(Z == 1) {
>> 93
>> 94 if( A < 2) {
>> 95 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 96 cross = fHadron->GetInelasticHadronNucleonXsc();
>> 97 } else {
>> 98 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 99 cross = fHadron->GetInelasticHadronNucleonXsc();
>> 100 fHadron->GetHadronNucleonXscNS(dp, G4Neutron::Neutron());
>> 101 cross += fHadron->GetInelasticHadronNucleonXsc();
>> 102 }
122 103
123 if(1 == Z) { <<
124 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) { 104 } else if(ekin > fGlauberEnergy) {
129 cross = (isPiplus) ? theGlauberFacPiPlus[Z << 105 cross = theGlauberFac[Z]*fGlauber->GetInelasticGlauberGribov(dp, Z, A);
130 cross *= fGlauber->GetInelasticGlauberGrib << 106
131 } else { 107 } else {
132 cross = fPion->GetInelasticCrossSection(dp << 108 cross = fPion->GetZandACrossSection(dp, Z, A);
133 } 109 }
134 #ifdef G4VERBOSE <<
135 if(verboseLevel > 1) { <<
136 G4cout << "G4BGGPionInelasticXS::GetCrossS <<
137 << dp->GetDefinition()->GetParticle <<
138 << " Ekin(GeV)= " << dp->GetKineti <<
139 << " in nucleus Z= " << Z << " A= <<
140 << " XS(b)= " << cross/barn <<
141 << G4endl; <<
142 } <<
143 #endif <<
144 return cross; <<
145 } <<
146 <<
147 //....oooOO0OOooo........oooOO0OOooo........oo <<
148 <<
149 G4double <<
150 G4BGGPionInelasticXS::GetIsoCrossSection(const <<
151 G4int <<
152 const <<
153 const <<
154 const <<
155 { <<
156 // this method should be called only for Z = <<
157 fHadron->HadronNucleonXscNS(dp->GetDefinitio <<
158 dp->GetKineticEn <<
159 G4double cross = A*fHadron->GetInelasticHadr <<
160 110
161 #ifdef G4VERBOSE << 111 if(verboseLevel > 1)
162 if(verboseLevel > 1) { <<
163 G4cout << "G4BGGPionInelasticXS::GetCrossS 112 G4cout << "G4BGGPionInelasticXS::GetCrossSection for "
164 << dp->GetDefinition()->GetParticle << 113 << dp->GetDefinition()->GetParticleName()
165 << " Ekin(GeV)= " << dp->GetKineti << 114 << " Ekin(GeV)= " << dp->GetKineticEnergy()
166 << " in nucleus Z=1 A=" << A << 115 << " in nucleus Z= " << Z << " A= " << A
167 << " XS(b)= " << cross/barn << 116 << " XS(b)= " << cross/barn
168 << G4endl; << 117 << G4endl;
169 } << 118
170 #endif <<
171 return cross; 119 return cross;
172 } 120 }
173 121
174 //....oooOO0OOooo........oooOO0OOooo........oo 122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
175 123
176 void G4BGGPionInelasticXS::BuildPhysicsTable(c 124 void G4BGGPionInelasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
177 { 125 {
178 if(verboseLevel > 1) { <<
179 G4cout << "G4BGGPionInelasticXS::BuildPhys <<
180 << p.GetParticleName() << G4endl; <<
181 } <<
182 if(&p == G4PionPlus::PionPlus() || &p == G4P 126 if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
183 isPiplus = (&p == G4PionPlus::PionPlus()); << 127 particle = &p;
>> 128 Initialise();
184 } else { 129 } else {
185 G4ExceptionDescription ed; << 130 G4cout << "### G4BGGPionInelasticXS WARNING: is not applicable to "
186 ed << "This BGG cross section is applicabl << 131 << p.GetParticleName()
187 << p.GetParticleName() << G4endl; << 132 << G4endl;
188 G4Exception("G4BGGPionInelasticXS::BuildPh <<
189 FatalException, ed); <<
190 } 133 }
191 } 134 }
192 135
193 //....oooOO0OOooo........oooOO0OOooo........oo 136 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
194 137
195 void G4BGGPionInelasticXS::Initialise() << 138 void G4BGGPionInelasticXS::DumpPhysicsTable(const G4ParticleDefinition&)
>> 139 {
>> 140 G4cout << "G4BGGPionInelasticXS:"<<G4endl;
>> 141 }
>> 142
>> 143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 144
>> 145 void G4BGGPionInelasticXS::Initialise()
196 { 146 {
197 theA[0] = theA[1] = 1; << 147 if(isInitialized) return;
>> 148 isInitialized = true;
>> 149
>> 150 fPion = new G4UPiNuclearCrossSection();
>> 151 fGlauber = new G4GlauberGribovCrossSection();
>> 152 fHadron = new G4HadronNucleonXsc();
>> 153 fPion->BuildPhysicsTable(*particle);
>> 154 fGlauber->BuildPhysicsTable(*particle);
>> 155 if(particle == G4PionPlus::PionPlus()) isPiplus = true;
>> 156
>> 157 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
198 G4ThreeVector mom(0.0,0.0,1.0); 158 G4ThreeVector mom(0.0,0.0,1.0);
199 G4DynamicParticle dp(thePiPlus, mom, fGlaube << 159 G4DynamicParticle dp(part, mom, fGlauberEnergy);
200 160
201 G4NistManager* nist = G4NistManager::Instanc 161 G4NistManager* nist = G4NistManager::Instance();
>> 162
202 G4double csup, csdn; 163 G4double csup, csdn;
>> 164 G4int A;
>> 165
>> 166 if(verboseLevel > 0) G4cout << "### G4BGGPionInelasticXS::Initialise for "
>> 167 << particle->GetParticleName()
>> 168 << " isPiplus: " << isPiplus
>> 169 << G4endl;
203 170
204 for (G4int iz=2; iz<93; ++iz) { << 171 for(G4int iz=2; iz<93; iz++) {
205 G4int A = G4lrint(nist->GetAtomicMassAmu(i << 172
206 theA[iz] = A; << 173 G4double Z = G4double(iz);
>> 174 A = G4lrint(nist->GetAtomicMassAmu(iz));
207 175
208 csup = fGlauber->GetInelasticGlauberGribov 176 csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, A);
209 csdn = fPion->GetInelasticCrossSection(&dp 177 csdn = fPion->GetInelasticCrossSection(&dp, iz, A);
210 theGlauberFacPiPlus[iz] = csdn/csup; <<
211 } <<
212 178
213 dp.SetDefinition(G4PionMinus::PionMinus()); << 179 theGlauberFac[iz] = csdn/csup;
214 for (G4int iz=2; iz<93; ++iz) { << 180 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
215 csup = fGlauber->GetInelasticGlauberGribov << 181 << " factor= " << theGlauberFac[iz] << G4endl;
216 csdn = fPion->GetInelasticCrossSection(&dp <<
217 theGlauberFacPiMinus[iz] = csdn/csup; <<
218 <<
219 if(verboseLevel > 1) { <<
220 G4cout << "Z= " << iz << " A= " << the <<
221 << " factorPiPlus= " << theGlauberFacPi <<
222 << " factorPiMinus= " << theGlauberFacP <<
223 << G4endl; <<
224 } <<
225 } 182 }
226 <<
227 theLowEPiPlus[1] = theLowEPiMinus[1]= 1.0; <<
228 dp.SetDefinition(thePiPlus); <<
229 dp.SetKineticEnergy(fLowEnergy); 183 dp.SetKineticEnergy(fLowEnergy);
230 for (G4int iz=2; iz<93; ++iz) { << 184 fHadron->GetHadronNucleonXscNS(&dp, G4Proton::Proton());
231 theLowEPiPlus[iz] = fPion->GetInelasticCro << 185 theCoulombFac[1] = fHadron->GetInelasticHadronNucleonXsc();
232 /CoulombFactorPiPlus(fLowEnergy, iz); << 186 if(isPiplus) { theCoulombFac[1] /= CoulombFactor(fLowEnergy,1); }
233 } << 187
>> 188 for(G4int iz=2; iz<93; iz++) {
234 189
235 dp.SetDefinition(G4PionMinus::PionMinus()); << 190 G4double Z = G4double(iz);
236 for (G4int iz=2; iz<93; ++iz) { << 191 A = G4lrint(nist->GetAtomicMassAmu(iz));
237 theLowEPiMinus[iz] = fPion->GetInelasticCr <<
238 /FactorPiMinus(fLowEnergy); <<
239 <<
240 if (verboseLevel > 1) { <<
241 G4cout << "Z= " << iz << " A= " << the <<
242 << " LowEtorPiPlus= " << theLowEPiPlus[ <<
243 << " LowEtorPiMinus= " << theLowEPiMinu <<
244 << G4endl; <<
245 } <<
246 } <<
247 } <<
248 192
249 //....oooOO0OOooo........oooOO0OOooo........oo << 193 theCoulombFac[iz] = fPion->GetZandACrossSection(&dp, iz, A);
>> 194 if(isPiplus) { theCoulombFac[iz] /= CoulombFactor(fLowEnergy,A); }
250 195
251 G4double G4BGGPionInelasticXS::CoulombFactorPi << 196 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
252 { << 197 << " factor= " << theCoulombFac[iz] << G4endl;
253 return (kinEnergy > 0.0) ? << 198 }
254 G4NuclearRadii::CoulombFactor(Z, theA[Z], <<
255 } 199 }
256 200
257 //....oooOO0OOooo........oooOO0OOooo........oo <<
258 201
259 G4double G4BGGPionInelasticXS::FactorPiMinus(G << 202 G4double G4BGGPionInelasticXS::CoulombFactor(G4double kinEnergy, G4int A)
260 { 203 {
261 return 1.0/std::sqrt(kinEnergy); << 204 G4double res= 0.0;
262 } << 205 if(kinEnergy <= DBL_MIN) return res;
>> 206 else if(A < 2) return kinEnergy*kinEnergy;
>> 207
>> 208 G4double elog = std::log10(kinEnergy/GeV);
>> 209 G4double aa = A;
263 210
264 //....oooOO0OOooo........oooOO0OOooo........oo << 211 // from G4ProtonInelasticCrossSection
>> 212 G4double f1 = 8.0 - 8.0/aa - 0.008*aa;
>> 213 G4double f2 = 2.34 - 5.4/aa - 0.0028*aa;
265 214
266 void << 215 res = 1.0/(1.0 + std::exp(-f1*(elog + f2)));
267 G4BGGPionInelasticXS::CrossSectionDescription( << 216
268 { << 217 f1 = 5.6 - 0.016*aa;
269 outFile << "The Barashenkov-Glauber-Gribov c << 218 f2 = 1.37 + 1.37/aa;
270 << "pion scattering from nuclei at a << 219 res *= ( 1.0 + (0.8 + 18./aa - 0.002*aa)/(1.0 + std::exp(f1*(elog + f2))));
271 << "parameterization is used below 9 << 220 return res;
272 << "parameterization is used above 9 <<
273 } 221 }
274 222
275 //....oooOO0OOooo........oooOO0OOooo........oo << 223
276 224