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>> 26 // $Id: G4BGGNucleonElasticXS.cc,v 1.7 2009/11/19 19:40:45 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-03-patch-01 $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class file 31 // GEANT4 Class file
29 // 32 //
30 // 33 //
31 // File name: G4BGGNucleonElasticXS 34 // File name: G4BGGNucleonElasticXS
32 // 35 //
33 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
34 // 37 //
35 // Creation date: 13.03.2007 38 // Creation date: 13.03.2007
>> 39 // Modifications:
>> 40 //
36 // 41 //
37 // ------------------------------------------- 42 // -------------------------------------------------------------------
38 // 43 //
39 44
40 #include "G4BGGNucleonElasticXS.hh" 45 #include "G4BGGNucleonElasticXS.hh"
41 #include "G4SystemOfUnits.hh" << 46 #include "G4GlauberGribovCrossSection.hh"
42 #include "G4ComponentGGHadronNucleusXsc.hh" <<
43 #include "G4NucleonNuclearCrossSection.hh" 47 #include "G4NucleonNuclearCrossSection.hh"
44 #include "G4HadronNucleonXsc.hh" 48 #include "G4HadronNucleonXsc.hh"
45 #include "G4NuclearRadii.hh" <<
46 #include "G4Proton.hh" 49 #include "G4Proton.hh"
47 #include "G4Neutron.hh" 50 #include "G4Neutron.hh"
48 #include "G4NistManager.hh" 51 #include "G4NistManager.hh"
49 #include "G4NuclearRadii.hh" <<
50 52
51 #include "G4CrossSectionDataSetRegistry.hh" << 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 <<
53 G4double G4BGGNucleonElasticXS::theGlauberFacP <<
54 G4double G4BGGNucleonElasticXS::theCoulombFacP <<
55 G4double G4BGGNucleonElasticXS::theGlauberFacN <<
56 G4double G4BGGNucleonElasticXS::theCoulombFacN <<
57 G4int G4BGGNucleonElasticXS::theA[93] = {0}; <<
58 54
59 G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(c << 55 G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(const G4ParticleDefinition*)
60 : G4VCrossSectionDataSet("BarashenkovGlauberG <<
61 { 56 {
62 verboseLevel = 0; 57 verboseLevel = 0;
63 fGlauberEnergy = 91.*GeV; 58 fGlauberEnergy = 91.*GeV;
64 fLowEnergy = 14.0*MeV; << 59 fLowEnergy = 20.*MeV;
65 fNucleon = new G4NucleonNuclearCrossSection( << 60 fNucleon = 0;
66 fGlauber = new G4ComponentGGHadronNucleusXsc << 61 fGlauber = 0;
67 fHadron = new G4HadronNucleonXsc(); << 62 fHadron = 0;
68 << 63 particle = 0;
69 theProton = G4Proton::Proton(); << 64 isProton = false;
70 isProton = (theProton == p); << 65 isInitialized = false;
71 SetForAllAtomsAndEnergies(true); <<
72 <<
73 if (0 == theA[0]) { Initialise(); } <<
74 } 66 }
75 67
76 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77 69
78 G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS( 70 G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS()
79 { 71 {
>> 72 delete fGlauber;
>> 73 delete fNucleon;
80 delete fHadron; 74 delete fHadron;
81 } 75 }
82 76
83 //....oooOO0OOooo........oooOO0OOooo........oo 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
84 78
85 G4bool << 79 G4double G4BGGNucleonElasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp,
86 G4BGGNucleonElasticXS::IsElementApplicable(con << 80 G4double Z,
87 con << 81 G4double A,
88 { << 82 G4double)
89 return true; <<
90 } <<
91 <<
92 //....oooOO0OOooo........oooOO0OOooo........oo <<
93 <<
94 G4bool G4BGGNucleonElasticXS::IsIsoApplicable( <<
95 <<
96 <<
97 <<
98 { <<
99 return (1 == Z); <<
100 } <<
101 <<
102 //....oooOO0OOooo........oooOO0OOooo........oo <<
103 <<
104 G4double <<
105 G4BGGNucleonElasticXS::GetElementCrossSection( <<
106 <<
107 { 83 {
108 // this method should be called only for Z > <<
109 <<
110 G4double cross = 0.0; 84 G4double cross = 0.0;
111 G4int Z = std::min(ZZ, 92); <<
112 G4double ekin = dp->GetKineticEnergy(); 85 G4double ekin = dp->GetKineticEnergy();
113 if(1 == Z) { << 86 G4int iz = G4int(Z);
114 cross = 1.0115*GetIsoCrossSection(dp,1,1); << 87 if(iz > 92) iz = 92;
115 } else { << 88
116 if(ekin <= fLowEnergy) { << 89 if(ekin <= fLowEnergy) {
117 cross = (isProton) ? theCoulombFacP[Z] : << 90 cross = theCoulombFac[iz];
118 cross *= CoulombFactor(ekin, Z); << 91 if(isProton) { cross *= CoulombFactor(ekin, A); }
119 } else if(ekin > fGlauberEnergy) { << 92
120 cross = (isProton) ? theGlauberFacP[Z] : << 93 } else if(iz == 1) {
121 cross *= fGlauber->GetElasticGlauberGrib << 94 if( A < 1.5) {
>> 95 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 96 cross = fHadron->GetElasticHadronNucleonXsc();
122 } else { 97 } else {
123 cross = fNucleon->GetElasticCrossSection << 98 fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
>> 99 cross = fHadron->GetElasticHadronNucleonXsc();
>> 100 fHadron->GetHadronNucleonXscNS(dp, G4Neutron::Neutron());
>> 101 cross += fHadron->GetElasticHadronNucleonXsc();
124 } 102 }
>> 103 } else if(ekin > fGlauberEnergy) {
>> 104 cross = theGlauberFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
>> 105 } else {
>> 106 cross = fNucleon->GetElasticCrossSection(dp, Z, A);
125 } 107 }
126 #ifdef G4VERBOSE <<
127 if (verboseLevel > 1) { <<
128 G4cout << "G4BGGNucleonElasticXS::GetEleme <<
129 << dp->GetDefinition()->GetParticle <<
130 << " Ekin(GeV)= " << dp->GetKineti <<
131 << " in nucleus Z= " << Z << " A= <<
132 << " XS(b)= " << cross/barn <<
133 << G4endl; <<
134 } <<
135 #endif <<
136 return cross; <<
137 } <<
138 108
139 //....oooOO0OOooo........oooOO0OOooo........oo << 109 if(verboseLevel > 1)
>> 110 G4cout << "G4BGGNucleonElasticXS::GetCrossSection for "
>> 111 << dp->GetDefinition()->GetParticleName()
>> 112 << " Ekin(GeV)= " << dp->GetKineticEnergy()
>> 113 << " in nucleus Z= " << Z << " A= " << A
>> 114 << " XS(b)= " << cross/barn
>> 115 << G4endl;
140 116
141 G4double <<
142 G4BGGNucleonElasticXS::GetIsoCrossSection(cons <<
143 G4in <<
144 cons <<
145 cons <<
146 cons <<
147 { <<
148 // this method should be called only for Z = <<
149 fHadron->HadronNucleonXscNS(dp->GetDefinitio <<
150 dp->GetKineticEn <<
151 G4double cross = A*fHadron->GetElasticHadron <<
152 <<
153 #ifdef G4VERBOSE <<
154 if (verboseLevel > 1) { <<
155 G4cout << "G4BGGNucleonElasticXS::GetIsoCr <<
156 << dp->GetDefinition()->GetParticle <<
157 << " Ekin(GeV)= " << dp->GetKineti <<
158 << " in nucleus Z=1 A=" << A <<
159 << " XS(b)= " << cross/barn <<
160 << G4endl; <<
161 } <<
162 #endif <<
163 return cross; 117 return cross;
164 } 118 }
165 119
166 //....oooOO0OOooo........oooOO0OOooo........oo 120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
167 121
168 void G4BGGNucleonElasticXS::BuildPhysicsTable( 122 void G4BGGNucleonElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
169 { 123 {
170 if(&p == theProton || &p == G4Neutron::Neutr << 124 if(&p == G4Proton::Proton() || &p == G4Neutron::Neutron()) {
171 isProton = (theProton == &p); << 125 particle = &p;
172 << 126 Initialise();
173 } else { 127 } else {
174 G4ExceptionDescription ed; << 128 G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to "
175 ed << "This BGG cross section is applicabl << 129 << p.GetParticleName()
176 << p.GetParticleName() << G4endl; << 130 << G4endl;
177 G4Exception("G4BGGNucleonElasticXS::BuildP <<
178 FatalException, ed); <<
179 } 131 }
180 } 132 }
181 133
182 //....oooOO0OOooo........oooOO0OOooo........oo 134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
183 135
184 void G4BGGNucleonElasticXS::Initialise() << 136 void G4BGGNucleonElasticXS::DumpPhysicsTable(const G4ParticleDefinition&)
185 { 137 {
186 theA[0] = theA[1] = 1; << 138 G4cout << "G4BGGNucleonElasticXS:"<<G4endl;
>> 139 }
>> 140
>> 141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 142
>> 143 void G4BGGNucleonElasticXS::Initialise()
>> 144 {
>> 145 if(isInitialized) return;
>> 146 isInitialized = true;
>> 147
>> 148 fNucleon = new G4NucleonNuclearCrossSection();
>> 149 fGlauber = new G4GlauberGribovCrossSection();
>> 150 fHadron = new G4HadronNucleonXsc();
>> 151 fNucleon->BuildPhysicsTable(*particle);
>> 152 fGlauber->BuildPhysicsTable(*particle);
>> 153 if(particle == G4Proton::Proton()) isProton = true;
>> 154
>> 155 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
187 G4ThreeVector mom(0.0,0.0,1.0); 156 G4ThreeVector mom(0.0,0.0,1.0);
188 G4DynamicParticle dp(theProton, mom, fGlaube << 157 G4DynamicParticle dp(part, mom, fGlauberEnergy);
189 158
190 G4NistManager* nist = G4NistManager::Instanc 159 G4NistManager* nist = G4NistManager::Instance();
191 G4double csup, csdn; <<
192 160
193 for (G4int iz=2; iz<93; ++iz) { << 161 G4double A, csup, csdn;
194 G4int A = G4lrint(nist->GetAtomicMassAmu(i <<
195 theA[iz] = A; <<
196 <<
197 csup = fGlauber->GetElasticGlauberGribov(& <<
198 csdn = fNucleon->GetElasticCrossSection(&d <<
199 theGlauberFacP[iz] = csdn/csup; <<
200 } <<
201 162
202 dp.SetDefinition(G4Neutron::Neutron()); << 163 if(verboseLevel > 0) G4cout << "### G4BGGNucleonElasticXS::Initialise for "
203 for (G4int iz=2; iz<93; ++iz) { << 164 << particle->GetParticleName() << G4endl;
204 csup = fGlauber->GetElasticGlauberGribov(& <<
205 csdn = fNucleon->GetElasticCrossSection(&d <<
206 theGlauberFacN[iz] = csdn/csup; <<
207 <<
208 if (verboseLevel > 1) { <<
209 G4cout << "G4BGGNucleonElasticXS::Init <<
210 << " GFactorP=" << theGlauberFa <<
211 << " GFactorN=" << theGlauberFa <<
212 } <<
213 } <<
214 165
215 theCoulombFacP[0] = theCoulombFacP[1] = << 166 for(G4int iz=2; iz<93; iz++) {
216 theCoulombFacN[0] = theCoulombFacN[1] = 1. << 167
217 dp.SetDefinition(theProton); << 168 G4double Z = G4double(iz);
218 dp.SetKineticEnergy(fLowEnergy); << 169 A = nist->GetAtomicMassAmu(iz);
219 for (G4int iz=2; iz<93; ++iz) { << 170
220 theCoulombFacP[iz] = fNucleon->GetElasticC << 171 csup = fGlauber->GetElasticGlauberGribov(&dp, Z, A);
221 /CoulombFactor(fLowEnergy, iz); << 172 csdn = fNucleon->GetElasticCrossSection(&dp, Z, A);
>> 173
>> 174 theGlauberFac[iz] = csdn/csup;
>> 175 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
>> 176 << " factor= " << theGlauberFac[iz] << G4endl;
222 } 177 }
223 dp.SetDefinition(G4Neutron::Neutron()); << 178 dp.SetKineticEnergy(fLowEnergy);
224 for(G4int iz=2; iz<93; ++iz) { << 179 fHadron->GetHadronNucleonXscNS(&dp, G4Proton::Proton());
225 theCoulombFacN[iz] = fNucleon->GetElasticC << 180 theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();
226 /CoulombFactor(fLowEnergy, iz); << 181 if(isProton) { theCoulombFac[1] /= CoulombFactor(fLowEnergy, 1.0); }
227 << 182
228 if (verboseLevel > 1) { << 183 for(G4int iz=2; iz<93; iz++) {
229 G4cout << "G4BGGNucleonElasticXS::Initia << 184
230 << " CFactorP=" << theCoulombFacP[iz] << 185 G4double Z = G4double(iz);
231 << " CFactorN=" << theCoulombFacN[iz] < << 186 A = nist->GetAtomicMassAmu(iz);
232 } << 187
>> 188 theCoulombFac[iz] = fNucleon->GetElasticCrossSection(&dp, Z, A);
>> 189 if(isProton) { theCoulombFac[iz] /= CoulombFactor(fLowEnergy, A); }
>> 190 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
>> 191 << " factor= " << theCoulombFac[iz] << G4endl;
233 } 192 }
234 } 193 }
235 194
236 //....oooOO0OOooo........oooOO0OOooo........oo 195 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
237 196
238 G4double G4BGGNucleonElasticXS::CoulombFactor( << 197 G4double G4BGGNucleonElasticXS::CoulombFactor(G4double kinEnergy, G4double A)
239 { 198 {
240 return (isProton) ? << 199 G4double res= 0.0;
241 G4NuclearRadii::CoulombFactor(Z, theA[Z], << 200 if(kinEnergy <= DBL_MIN) return res;
242 } << 201 else if(A < 1.5) return kinEnergy*kinEnergy;
243 202
244 //....oooOO0OOooo........oooOO0OOooo........oo << 203 G4double elog = std::log10(kinEnergy/GeV);
245 204
246 void G4BGGNucleonElasticXS::CrossSectionDescri << 205 // from G4ProtonInelasticCrossSection
247 { << 206 G4double f1 = 8.0 - 8.0/A - 0.008*A;
248 outFile << "The Barashenkov-Glauber-Gribov c << 207 G4double f2 = 2.34 - 5.4/A - 0.0028*A;
249 << "scattering of protons and neutro << 208
250 << "Barashenkov parameterization bel << 209 res = 1.0/(1.0 + std::exp(-f1*(elog + f2)));
251 << "parameterization above 91 GeV. n << 210
>> 211 f1 = 5.6 - 0.016*A;
>> 212 f2 = 1.37 + 1.37/A;
>> 213 res *= ( 1.0 + (0.8 + 18./A - 0.002*A)/(1.0 + std::exp(f1*(elog + f2))));
>> 214 return res;
252 } 215 }
253 216
254 //....oooOO0OOooo........oooOO0OOooo........oo 217 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 218
>> 219
255 220