source: trunk/source/processes/hadronic/cross_sections/src/G4BGGNucleonInelasticXS.cc@ 1201

Last change on this file since 1201 was 1196, checked in by garnier, 16 years ago

update CVS release candidate geant4.9.3.01
File size: 7.7 KB
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25//
26// $Id: G4BGGNucleonInelasticXS.cc,v 1.5 2009/11/19 12:28:56 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-03-cand-01 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class file
32//
33//
34// File name: G4BGGNucleonInelasticXS
35//
36// Author: Vladimir Ivanchenko
37//
38// Creation date: 13.03.2007
39// Modifications:
40//
41//
42// -------------------------------------------------------------------
43//
44
45#include "G4BGGNucleonInelasticXS.hh"
46#include "G4GlauberGribovCrossSection.hh"
47#include "G4NucleonNuclearCrossSection.hh"
48#include "G4HadronNucleonXsc.hh"
49#include "G4Proton.hh"
50#include "G4Neutron.hh"
51#include "G4NistManager.hh"
52
53//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54
55G4BGGNucleonInelasticXS::G4BGGNucleonInelasticXS(const G4ParticleDefinition* p)
56{
57 verboseLevel = 0;
58 fGlauberEnergy = 91.*GeV;
59 fLowEnergy = 20.*MeV;
60 fNucleon = 0;
61 fGlauber = 0;
62 fHadron = 0;
63 particle = p;
64 isProton = false;
65 isInitialized = false;
66}
67
68//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69
70G4BGGNucleonInelasticXS::~G4BGGNucleonInelasticXS()
71{
72 delete fGlauber;
73 delete fNucleon;
74 delete fHadron;
75}
76
77//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78
79G4double G4BGGNucleonInelasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp,
80 G4double Z,
81 G4double A,
82 G4double)
83{
84 G4double cross = 0.0;
85 G4double ekin = dp->GetKineticEnergy();
86 G4int iz = G4int(Z);
87 if(iz > 92) iz = 92;
88
89 if(ekin <= fLowEnergy) {
90 cross = theCoulombFac[iz]*CoulombFactor(ekin, A);
91 } else if(iz == 1) {
92 if( A < 1.5) {
93 //fHadron->GetHadronNucleonXscPDG(dp, G4Proton::Proton());
94 //fHadron->GetHadronNucleonXscEL(dp, G4Proton::Proton());
95 //fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
96 //fHadron->GetHadronNucleonXscVU(dp, G4Proton::Proton());
97 fHadron->GetHadronNucleonXscMK(dp, G4Proton::Proton());
98 cross = fHadron->GetInelasticHadronNucleonXsc();
99 } else {
100 fHadron->GetHadronNucleonXscMK(dp, G4Proton::Proton());
101 cross = fHadron->GetInelasticHadronNucleonXsc();
102 fHadron->GetHadronNucleonXscMK(dp, G4Neutron::Neutron());
103 cross += fHadron->GetInelasticHadronNucleonXsc();
104 }
105 } else if(ekin > fGlauberEnergy) {
106 cross = theGlauberFac[iz]*fGlauber->GetInelasticGlauberGribov(dp, Z, A);
107 } else {
108 cross = fNucleon->GetIsoZACrossSection(dp, Z, A);
109 }
110
111 if(verboseLevel > 1)
112 G4cout << "G4BGGNucleonInelasticXS::GetCrossSection for "
113 << dp->GetDefinition()->GetParticleName()
114 << " Ekin(GeV)= " << dp->GetKineticEnergy()
115 << " in nucleus Z= " << Z << " A= " << A
116 << " XS(b)= " << cross/barn
117 << G4endl;
118
119 return cross;
120}
121
122//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
123
124void G4BGGNucleonInelasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
125{
126 if(&p == G4Proton::Proton() || &p == G4Neutron::Neutron()) {
127 particle = &p;
128 Initialise();
129 } else {
130 G4cout << "### G4BGGNucleonInelasticXS WARNING: is not applicable to "
131 << p.GetParticleName()
132 << G4endl;
133 }
134}
135
136//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
137
138void G4BGGNucleonInelasticXS::DumpPhysicsTable(const G4ParticleDefinition&)
139{
140 G4cout << "G4BGGNucleonInelasticXS:"<<G4endl;
141}
142
143//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
144
145void G4BGGNucleonInelasticXS::Initialise()
146{
147 if(isInitialized) return;
148 isInitialized = true;
149
150 fNucleon = new G4NucleonNuclearCrossSection();
151 fGlauber = new G4GlauberGribovCrossSection();
152 fHadron = new G4HadronNucleonXsc();
153 fNucleon->BuildPhysicsTable(*particle);
154 fGlauber->BuildPhysicsTable(*particle);
155 if(particle == G4Proton::Proton()) isProton = true;
156
157 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
158 G4ThreeVector mom(0.0,0.0,1.0);
159 G4DynamicParticle dp(part, mom, fGlauberEnergy);
160
161 G4NistManager* nist = G4NistManager::Instance();
162 G4double A = nist->GetAtomicMassAmu(2);
163
164 G4double csup, csdn;
165
166 if(verboseLevel > 0) G4cout << "### G4BGGNucleonInelasticXS::Initialise for "
167 << particle->GetParticleName() << G4endl;
168
169 for(G4int iz=2; iz<93; iz++) {
170
171 G4double Z = G4double(iz);
172 A = nist->GetAtomicMassAmu(iz);
173
174 csup = fGlauber->GetInelasticGlauberGribov(&dp, Z, A);
175 csdn = fNucleon->GetIsoZACrossSection(&dp, Z, A);
176
177 theGlauberFac[iz] = csdn/csup;
178 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
179 << " factor= " << theGlauberFac[iz] << G4endl;
180 }
181 dp.SetKineticEnergy(fLowEnergy);
182 fHadron->GetHadronNucleonXscMK(&dp, G4Proton::Proton());
183 theCoulombFac[1] =
184 fHadron->GetInelasticHadronNucleonXsc()/CoulombFactor(fLowEnergy,1.0);
185
186 for(G4int iz=2; iz<93; iz++) {
187
188 G4double Z = G4double(iz);
189 A = nist->GetAtomicMassAmu(iz);
190
191 theCoulombFac[iz] =
192 fNucleon->GetIsoZACrossSection(&dp, Z, A)/CoulombFactor(fLowEnergy,A);
193
194 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
195 << " factor= " << theCoulombFac[iz] << G4endl;
196 }
197}
198
199//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
200
201G4double G4BGGNucleonInelasticXS::CoulombFactor(G4double kinEnergy, G4double A)
202{
203 G4double res= 0.0;
204 if(kinEnergy <= DBL_MIN) return res;
205 else if (A < 1.5) return kinEnergy*kinEnergy;
206
207 G4double elog = std::log10(kinEnergy/GeV);
208
209 // from G4ProtonInelasticCrossSection
210 if(isProton) {
211 G4double f1 = 8.0 - 8.0/A - 0.008*A;
212 G4double f2 = 2.34 - 5.4/A - 0.0028*A;
213
214 res = 1.0/(1.0 + std::exp(-f1*(elog + f2)));
215
216 f1 = 5.6 - 0.016*A;
217 f2 = 1.37 + 1.37/A;
218 res *= ( 1.0 + (0.8 + 18./A - 0.002*A)/(1.0 + std::exp(f1*(elog + f2))));
219 } else {
220
221 G4double p3 = 0.6 + 13./A - 0.0005*A;
222 G4double p4 = 7.2449 - 0.018242*A;
223 G4double p5 = 1.36 + 1.8/A + 0.0005*A;
224 G4double p6 = 1. + 200./A + 0.02*A;
225 G4double p7 = 3.0 - (A-70.)*(A-200.)/11000.;
226
227 res = (1.+p3/(1. + std::exp(p4*(elog+p5))))/(1.+std::exp(-p6*(elog+p7)));
228
229 }
230 return res;
231}
232
233//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
234
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