1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // $Id: G4BGGNucleonInelasticXS.cc,v 1.3 2008/12/01 16:50:23 vnivanch Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
---|
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 | |
---|
55 | G4BGGNucleonInelasticXS::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 | |
---|
70 | G4BGGNucleonInelasticXS::~G4BGGNucleonInelasticXS() |
---|
71 | { |
---|
72 | delete fGlauber; |
---|
73 | delete fNucleon; |
---|
74 | delete fHadron; |
---|
75 | } |
---|
76 | |
---|
77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
78 | |
---|
79 | G4double 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 | |
---|
124 | void 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 | |
---|
138 | void G4BGGNucleonInelasticXS::DumpPhysicsTable(const G4ParticleDefinition&) |
---|
139 | { |
---|
140 | G4cout << "G4BGGNucleonInelasticXS:"<<G4endl; |
---|
141 | } |
---|
142 | |
---|
143 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
144 | |
---|
145 | void 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 | |
---|
201 | G4double 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 | |
---|