source: trunk/source/processes/hadronic/cross_sections/src/G4UElasticCrossSection.cc@ 1315

Last change on this file since 1315 was 962, checked in by garnier, 17 years ago

update processes
File size: 7.2 KB
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1//
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24// ********************************************************************
25//
26//
27// 12.08.06 V.Ivanchenko - first implementation
28// 22.01.07 V.Ivanchenko - add GetIsoZACrossSection
29// 05.03.07 V.Ivanchenko - use G4NucleonNuclearCrossSection
30// 06.03.07 V.Ivanchenko - add Initialise function
31//
32//
33
34
35#include "G4UElasticCrossSection.hh"
36
37#include "G4ParticleTable.hh"
38#include "G4GlauberGribovCrossSection.hh"
39#include "G4NucleonNuclearCrossSection.hh"
40#include "G4UPiNuclearCrossSection.hh"
41#include "G4HadronCrossSections.hh"
42#include "G4ParticleDefinition.hh"
43#include "G4Element.hh"
44#include "G4Proton.hh"
45#include "G4Neutron.hh"
46#include "G4PionPlus.hh"
47#include "G4PionMinus.hh"
48#include "G4NistManager.hh"
49
50//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51
52G4UElasticCrossSection::G4UElasticCrossSection(const G4ParticleDefinition*)
53{
54 verboseLevel = 0;
55 hasGlauber = false;
56 thEnergy = 90.*GeV;
57 fGlauber = new G4GlauberGribovCrossSection();
58 fGheisha = G4HadronCrossSections::Instance();
59 fNucleon = 0;
60 fUPi = 0;
61}
62
63//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64
65G4UElasticCrossSection::~G4UElasticCrossSection()
66{
67 delete fGlauber;
68 if(fNucleon) delete fNucleon;
69 if(fUPi) delete fUPi;
70}
71
72//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73
74G4bool G4UElasticCrossSection::IsApplicable(const G4DynamicParticle* dp,
75 const G4Element* elm)
76{
77 return IsZAApplicable(dp, elm->GetZ(), elm->GetN());
78}
79
80//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
81
82G4bool G4UElasticCrossSection::IsZAApplicable(const G4DynamicParticle* dp,
83 G4double Z, G4double A)
84{
85 G4bool res = false;
86 if(fNucleon || fUPi) res = true;
87 else res = fGheisha->IsApplicable(dp, Z, A);
88 if(verboseLevel > 1)
89 G4cout << "G4UElasticCrossSection::IsApplicable for "
90 << dp->GetDefinition()->GetParticleName()
91 << " Ekin(GeV)= " << dp->GetKineticEnergy()
92 << G4endl;
93 return res;
94}
95
96//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
97
98G4double G4UElasticCrossSection::GetCrossSection(const G4DynamicParticle* dp,
99 const G4Element* elm,
100 G4double temp)
101{
102 return GetIsoZACrossSection(dp, elm->GetZ(), elm->GetN(), temp);
103}
104
105//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
106
107G4double G4UElasticCrossSection::GetIsoZACrossSection(const G4DynamicParticle* dp,
108 G4double Z,
109 G4double A,
110 G4double)
111{
112 G4double cross = 0.0;
113 G4double ekin = dp->GetKineticEnergy();
114 G4int iz = G4int(Z);
115 if(iz > 92) iz = 92;
116
117 // proton and neutron
118 if(fNucleon) {
119 if(iz == 1) cross = fGheisha->GetElasticCrossSection(dp, Z, A);
120 else if(ekin > thEnergy) {
121 cross = theFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
122 } else {
123 cross = fNucleon->GetElasticCrossSection(dp, Z, A);
124 }
125
126 // pions
127 } else if(fUPi) {
128 if(iz == 1) cross = fGheisha->GetElasticCrossSection(dp, Z, A);
129 else if(ekin > thEnergy) {
130 cross = theFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
131 } else {
132 cross = fUPi->GetElasticCrossSection(dp, Z, A);
133 }
134
135 //others
136 } else {
137 if(hasGlauber && ekin > thEnergy) {
138 cross = theFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
139 } else if(fGheisha->IsApplicable(dp, Z, A)) {
140 cross = fGheisha->GetElasticCrossSection(dp, Z, A);
141 }
142 }
143
144 if(verboseLevel > 1)
145 G4cout << "G4UElasticCrossSection::GetCrossSection for "
146 << dp->GetDefinition()->GetParticleName()
147 << " Ekin(GeV)= " << dp->GetKineticEnergy()
148 << " in nucleus Z= " << Z << " A= " << A
149 << " XS(b)= " << cross/barn
150 << G4endl;
151
152 return cross;
153}
154
155//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
156
157void G4UElasticCrossSection::BuildPhysicsTable(const G4ParticleDefinition& p)
158{
159 if(&p == G4Proton::Proton() || &p == G4Neutron::Neutron()) {
160 fNucleon = new G4NucleonNuclearCrossSection();
161 } else if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
162 fUPi = new G4UPiNuclearCrossSection();
163 }
164 Initialise(&p);
165}
166
167//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
168
169void G4UElasticCrossSection::DumpPhysicsTable(const G4ParticleDefinition&)
170{
171 G4cout << "G4UElasticCrossSection:"<<G4endl;
172}
173
174
175//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
176
177void G4UElasticCrossSection::Initialise(const G4ParticleDefinition* p)
178{
179 G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(p);
180 G4ThreeVector mom(0.0,0.0,1.0);
181 G4DynamicParticle dp(part, mom, thEnergy);
182
183 G4NistManager* nist = G4NistManager::Instance();
184 G4double A = nist->GetAtomicMassAmu(2);
185
186 if(fGlauber->IsZAApplicable(&dp, 2.0, A)) {
187 hasGlauber = true;
188
189 if(verboseLevel > 0) G4cout << "### G4UElasticCrossSection::Initialise for "
190 << p->GetParticleName() << G4endl;
191 G4double csup, csdn;
192 for(G4int iz=2; iz<93; iz++) {
193
194 G4double Z = G4double(iz);
195 A = nist->GetAtomicMassAmu(iz);
196 csup = fGlauber->GetElasticGlauberGribov(&dp, Z, A);
197 // proton and neutron
198 if(fNucleon) {
199 csdn = fNucleon->GetElasticCrossSection(&dp, Z, A);
200
201 // pions
202 } else if(fUPi) {
203 csdn = fUPi->GetElasticCrossSection(&dp, Z, A);
204
205 // other
206 } else if(fGheisha->IsApplicable(&dp, Z, A)) {
207 csdn = fGheisha->GetElasticCrossSection(&dp, Z, A);
208
209 } else {
210 csdn = csup;
211 }
212 theFac[iz] = csdn/csup;
213 if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
214 << " factor= " << theFac[iz] << G4endl;
215 }
216 }
217}
218
219//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
220
221
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