| Geant4 Cross Reference |
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 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France
33 //
34 #define INCLXX_IN_GEANT4_MODE 1
35
36 #include "globals.hh"
37
38 /** \file G4INCLNuclearPotentialConstant.cc
39 * \brief Isospin- and energy-independent nuclear potential.
40 *
41 * Provides a constant nuclear potential (V0).
42 *
43 * \date 17 January 2011
44 * \author Davide Mancusi
45 */
46
47 #include "G4INCLNuclearPotentialConstant.hh"
48 #include "G4INCLParticleTable.hh"
49
50 namespace G4INCL {
51
52 namespace NuclearPotential {
53
54 // Constructors
55 NuclearPotentialConstant::NuclearPotentialConstant(const G4int A, const G4int Z, const G4bool aPionPotential)
56 : INuclearPotential(A, Z, aPionPotential)
57 {
58 initialize();
59 }
60
61 // Destructor
62 NuclearPotentialConstant::~NuclearPotentialConstant() {
63 }
64
65 void NuclearPotentialConstant::initialize() {
66 const G4double mp = ParticleTable::getINCLMass(Proton);
67 const G4double mn = ParticleTable::getINCLMass(Neutron);
68
69 const G4double theFermiMomentum = ParticleTable::getFermiMomentum(theA,theZ);
70
71 fermiMomentum[Proton] = theFermiMomentum;
72 const G4double theProtonFermiEnergy = std::sqrt(theFermiMomentum*theFermiMomentum + mp*mp) - mp;
73 fermiEnergy[Proton] = theProtonFermiEnergy;
74
75 fermiMomentum[Neutron] = theFermiMomentum;
76 const G4double theNeutronFermiEnergy = std::sqrt(theFermiMomentum*theFermiMomentum + mn*mn) - mn;
77 fermiEnergy[Neutron] = theNeutronFermiEnergy;
78
79 fermiEnergy[DeltaPlusPlus] = fermiEnergy.find(Proton)->second;
80 fermiEnergy[DeltaPlus] = fermiEnergy.find(Proton)->second;
81 fermiEnergy[DeltaZero] = fermiEnergy.find(Neutron)->second;
82 fermiEnergy[DeltaMinus] = fermiEnergy.find(Neutron)->second;
83
84 fermiEnergy[SigmaPlus] = fermiEnergy.find(Proton)->second;
85 fermiEnergy[SigmaZero] = fermiEnergy.find(Proton)->second;
86 fermiEnergy[SigmaMinus] = fermiEnergy.find(Proton)->second;
87
88 fermiEnergy[Lambda] = fermiEnergy.find(Neutron)->second;
89
90
91 const G4double theAverageSeparationEnergy = 0.5*(ParticleTable::getSeparationEnergy(Proton,theA,theZ)+ParticleTable::getSeparationEnergy(Neutron,theA,theZ));
92 separationEnergy[Proton] = theAverageSeparationEnergy;
93 separationEnergy[Neutron] = theAverageSeparationEnergy;
94
95 // Use separation energies from the ParticleTable
96 vNucleon = 0.5*(theProtonFermiEnergy + theNeutronFermiEnergy) + theAverageSeparationEnergy;
97 vDelta = vNucleon;
98 vSigma = -16.; // Caution: repulsive potential for Sigmas
99 vLambda = 28.;
100 separationEnergy[DeltaPlusPlus] = vDelta - fermiEnergy.find(DeltaPlusPlus)->second;
101 separationEnergy[DeltaPlus] = vDelta - fermiEnergy.find(DeltaPlus)->second;
102 separationEnergy[DeltaZero] = vDelta - fermiEnergy.find(DeltaZero)->second;
103 separationEnergy[DeltaMinus] = vDelta - fermiEnergy.find(DeltaMinus)->second;
104
105 separationEnergy[PiPlus] = 0.;
106 separationEnergy[PiZero] = 0.;
107 separationEnergy[PiMinus] = 0.;
108
109 separationEnergy[Eta] = 0.;
110 separationEnergy[Omega] = 0.;
111 separationEnergy[EtaPrime] = 0.;
112 separationEnergy[Photon] = 0.;
113
114 separationEnergy[Lambda] = 0.;
115 separationEnergy[SigmaPlus] = 0.;
116 separationEnergy[SigmaZero] = 0.;
117 separationEnergy[SigmaMinus] = 0.;
118 separationEnergy[KPlus] = 0.;
119 separationEnergy[KZero] = 0.;
120 separationEnergy[KZeroBar] = 0.;
121 separationEnergy[KMinus] = 0.;
122 separationEnergy[KShort] = 0.;
123 separationEnergy[KLong] = 0.;
124
125 INCL_DEBUG("Table of separation energies [MeV] for A=" << theA << ", Z=" << theZ << ":" << '\n'
126 << " proton: " << separationEnergy[Proton] << '\n'
127 << " neutron: " << separationEnergy[Neutron] << '\n'
128 << " delta++: " << separationEnergy[DeltaPlusPlus] << '\n'
129 << " delta+: " << separationEnergy[DeltaPlus] << '\n'
130 << " delta0: " << separationEnergy[DeltaZero] << '\n'
131 << " delta-: " << separationEnergy[DeltaMinus] << '\n'
132 << " pi+: " << separationEnergy[PiPlus] << '\n'
133 << " pi0: " << separationEnergy[PiZero] << '\n'
134 << " pi-: " << separationEnergy[PiMinus] << '\n'
135 << " eta: " << separationEnergy[Eta] << '\n'
136 << " omega: " << separationEnergy[Omega] << '\n'
137 << " etaprime:" << separationEnergy[EtaPrime] << '\n'
138 << " photon: " << separationEnergy[Photon] << '\n'
139 << " lambda: " << separationEnergy[Lambda] << '\n'
140 << " sigmaplus: " << separationEnergy[SigmaPlus] << '\n'
141 << " sigmazero: " << separationEnergy[SigmaZero] << '\n'
142 << " sigmaminus: " << separationEnergy[SigmaMinus] << '\n'
143 << " kplus: " << separationEnergy[KPlus] << '\n'
144 << " kzero: " << separationEnergy[KZero] << '\n'
145 << " kzerobar: " << separationEnergy[KZeroBar] << '\n'
146 << " kminus: " << separationEnergy[KMinus] << '\n'
147 << " kshort: " << separationEnergy[KShort] << '\n'
148 << " klong: " << separationEnergy[KLong] << '\n'
149 );
150
151 INCL_DEBUG("Table of Fermi energies [MeV] for A=" << theA << ", Z=" << theZ << ":" << '\n'
152 << " proton: " << fermiEnergy[Proton] << '\n'
153 << " neutron: " << fermiEnergy[Neutron] << '\n'
154 << " delta++: " << fermiEnergy[DeltaPlusPlus] << '\n'
155 << " delta+: " << fermiEnergy[DeltaPlus] << '\n'
156 << " delta0: " << fermiEnergy[DeltaZero] << '\n'
157 << " delta-: " << fermiEnergy[DeltaMinus] << '\n'
158 << " lambda: " << fermiEnergy[Lambda] << '\n'
159 << " sigmaplus: " << fermiEnergy[SigmaPlus] << '\n'
160 << " sigmazero: " << fermiEnergy[SigmaZero] << '\n'
161 << " sigmaminus: " << fermiEnergy[SigmaMinus] << '\n'
162 );
163
164 INCL_DEBUG("Table of Fermi momenta [MeV/c] for A=" << theA << ", Z=" << theZ << ":" << '\n'
165 << " proton: " << fermiMomentum[Proton] << '\n'
166 << " neutron: " << fermiMomentum[Neutron] << '\n'
167 );
168 }
169
170 G4double NuclearPotentialConstant::computePotentialEnergy(const Particle *particle) const {
171
172 switch( particle->getType() )
173 {
174 case Proton:
175 case Neutron:
176 return vNucleon;
177 break;
178
179 case PiPlus:
180 case PiZero:
181 case PiMinus:
182 return computePionPotentialEnergy(particle);
183 break;
184
185 case Eta:
186 case Omega:
187 case EtaPrime:
188 return computePionResonancePotentialEnergy(particle);
189 break;
190
191 case SigmaPlus:
192 case SigmaZero:
193 case SigmaMinus:
194 return vSigma;
195 break;
196 case Lambda:
197 return vLambda;
198 break;
199
200 case KPlus:
201 case KZero:
202 case KZeroBar:
203 case KMinus:
204 return computeKaonPotentialEnergy(particle);
205 break;
206
207 case Photon:
208 return 0.0;
209 break;
210
211 case DeltaPlusPlus:
212 case DeltaPlus:
213 case DeltaZero:
214 case DeltaMinus:
215 return vDelta;
216 break;
217 case UnknownParticle:
218 INCL_ERROR("Trying to compute potential energy of an unknown particle.");
219 return 0.0;
220 break;
221 default:
222 INCL_ERROR("Trying to compute potential energy of a malformed particle.");
223 return 0.0;
224 break;
225 }
226 }
227
228 }
229 }
230
231