source: trunk/source/processes/hadronic/cross_sections/src/G4UInelasticCrossSection.cc @ 846

Last change on this file since 846 was 819, checked in by garnier, 16 years ago

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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 "G4UInelasticCrossSection.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
52G4UInelasticCrossSection::G4UInelasticCrossSection(const G4ParticleDefinition* p) 
53{
54  hasGlauber = false;
55  thEnergy   = 100.*GeV;
56  fGlauber   = new G4GlauberGribovCrossSection();
57  fGheisha   = G4HadronCrossSections::Instance();
58  fNucleon   = 0;
59  fUPi       = 0;
60  if(p == G4Proton::Proton() || p == G4Neutron::Neutron())
61    fNucleon = new G4NucleonNuclearCrossSection();
62  else if(p == G4PionPlus::PionPlus() || p == G4PionMinus::PionMinus())
63    fUPi = new G4UPiNuclearCrossSection();
64  verboseLevel = 0;
65  Initialise(p);
66}
67
68//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69
70G4UInelasticCrossSection::~G4UInelasticCrossSection()
71{
72  delete fGlauber;
73  if(fNucleon) delete fNucleon;
74  if(fUPi)     delete fUPi;
75}
76
77//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78
79G4bool G4UInelasticCrossSection::IsApplicable(const G4DynamicParticle* dp, 
80                                              const G4Element*  elm)
81{
82  return IsZAApplicable(dp, elm->GetZ(), elm->GetN());
83}
84
85//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
86
87G4bool G4UInelasticCrossSection::IsZAApplicable(const G4DynamicParticle* dp, 
88                                                G4double Z, G4double A)
89{
90  G4bool res = false;
91  if(fNucleon || fUPi) res = true;
92  else res = fGheisha->IsApplicable(dp, Z, A);
93  if(verboseLevel > 1) 
94    G4cout << "G4UInelasticCrossSection::IsApplicable  for "
95           << dp->GetDefinition()->GetParticleName()
96           << "  Ekin(GeV)= " << dp->GetKineticEnergy()
97           << G4endl;
98  return res;
99}
100
101//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
102
103G4double G4UInelasticCrossSection::GetCrossSection(const G4DynamicParticle* dp, 
104                                                   const G4Element* elm, 
105                                                   G4double temp)
106{
107  return GetIsoZACrossSection(dp, elm->GetZ(), elm->GetN(), temp);
108}
109
110//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
111
112G4double G4UInelasticCrossSection::GetIsoZACrossSection(const G4DynamicParticle* dp, 
113                                                        G4double Z,
114                                                        G4double A, 
115                                                        G4double)
116{
117  G4double cross = 0.0;
118  G4double ekin = dp->GetKineticEnergy();
119  G4int iz = G4int(Z + 0.5);
120  if(iz > 92) iz = 92;
121
122    // proton and neutron
123  if(fNucleon) { 
124    if(iz == 1) cross = fGheisha->GetInelasticCrossSection(dp, Z, A);
125    else if(ekin > thEnergy) {
126      cross = theFac[iz]*fGlauber->GetInelasticGlauberGribov(dp, Z, A);
127    } else {
128      cross = fNucleon->GetIsoZACrossSection(dp, Z, A);
129    }
130
131    // pions
132  } else if(fUPi) {
133    if(iz == 1) cross = fGheisha->GetInelasticCrossSection(dp, Z, A);
134    else if(ekin > thEnergy) {
135      cross = theFac[iz]*fGlauber->GetInelasticGlauberGribov(dp, Z, A);
136    } else {
137      cross = fUPi->GetInelasticCrossSection(dp, Z, A);
138    }
139
140    //others
141  } else {
142    if(hasGlauber && ekin > thEnergy) {
143      cross = theFac[iz]*fGlauber->GetInelasticGlauberGribov(dp, Z, A);
144    } else if(fGheisha->IsApplicable(dp, Z, A)){
145      cross = fGheisha->GetInelasticCrossSection(dp, Z, A);
146    }
147  }
148
149  if(verboseLevel > 1) 
150    G4cout << "G4UInelasticCrossSection::GetCrossSection  for "
151           << dp->GetDefinition()->GetParticleName()
152           << "  Ekin(GeV)= " << dp->GetKineticEnergy()
153           << " in nucleus Z= " << Z << "  A= " << A
154           << " XS(b)= " << cross/barn
155           << G4endl;
156
157  return cross;
158}
159
160//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
161
162void G4UInelasticCrossSection::BuildPhysicsTable(const G4ParticleDefinition&)
163{
164}
165
166//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
167
168void G4UInelasticCrossSection::DumpPhysicsTable(const G4ParticleDefinition&) 
169{
170  G4cout << "G4UInelasticCrossSection:"<<G4endl;
171}
172
173
174//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
175
176void G4UInelasticCrossSection::Initialise(const G4ParticleDefinition* p) 
177{
178  G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(p);
179  G4ThreeVector mom(0.0,0.0,1.0);
180  G4DynamicParticle dp(part, mom, thEnergy);
181
182  G4NistManager* nist = G4NistManager::Instance();
183  G4double A = nist->GetAtomicMassAmu(2);
184
185  if(fGlauber->IsZAApplicable(&dp, 2.0, A)) {
186    hasGlauber = true;
187
188    if(verboseLevel > 0) G4cout << "### G4UInelasticCrossSection::Initialise for "
189                                << p->GetParticleName() << G4endl;
190    G4double csup, csdn;
191    for(G4int iz=2; iz<93; iz++) {
192
193      G4double Z = G4double(iz);
194      A = nist->GetAtomicMassAmu(iz);
195      csup = fGlauber->GetInelasticGlauberGribov(&dp, Z, A);
196
197      // proton and neutron
198      if(fNucleon) { 
199        csdn = fNucleon->GetIsoZACrossSection(&dp, Z, A);
200
201        // pions
202      } else if(fUPi) {
203        csdn = fUPi->GetInelasticCrossSection(&dp, Z, A);
204
205        // other
206      } else if(fGheisha->IsApplicable(&dp, Z, A)) {
207        csdn = fGheisha->GetInelasticCrossSection(&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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