00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // INCL++ intra-nuclear cascade model 00027 // Pekka Kaitaniemi, CEA and Helsinki Institute of Physics 00028 // Davide Mancusi, CEA 00029 // Alain Boudard, CEA 00030 // Sylvie Leray, CEA 00031 // Joseph Cugnon, University of Liege 00032 // 00033 #define INCLXX_IN_GEANT4_MODE 1 00034 00035 #include "globals.hh" 00036 00046 #include "G4INCLNuclearPotentialConstant.hh" 00047 #include "G4INCLParticleTable.hh" 00048 00049 namespace G4INCL { 00050 00051 namespace NuclearPotential { 00052 00053 // Constructors 00054 NuclearPotentialConstant::NuclearPotentialConstant(const G4int A, const G4int Z, const G4bool aPionPotential) 00055 : INuclearPotential(A, Z, aPionPotential) 00056 { 00057 initialize(); 00058 } 00059 00060 // Destructor 00061 NuclearPotentialConstant::~NuclearPotentialConstant() { 00062 } 00063 00064 void NuclearPotentialConstant::initialize() { 00065 const G4double mp = ParticleTable::getINCLMass(Proton); 00066 const G4double mn = ParticleTable::getINCLMass(Neutron); 00067 00068 G4double theFermiMomentum; 00069 if(theA<ParticleTable::clusterTableASize && theZ<ParticleTable::clusterTableZSize) 00070 // Use momentum RMS from tables to define the Fermi momentum for light 00071 // nuclei 00072 theFermiMomentum = Math::sqrtFiveThirds * ParticleTable::getMomentumRMS(theA,theZ); 00073 else 00074 theFermiMomentum = PhysicalConstants::Pf; 00075 00076 fermiMomentum[Proton] = theFermiMomentum; 00077 const G4double theProtonFermiEnergy = std::sqrt(theFermiMomentum*theFermiMomentum + mp*mp) - mp; 00078 fermiEnergy[Proton] = theProtonFermiEnergy; 00079 00080 fermiMomentum[Neutron] = theFermiMomentum; 00081 const G4double theNeutronFermiEnergy = std::sqrt(theFermiMomentum*theFermiMomentum + mn*mn) - mn; 00082 fermiEnergy[Neutron] = theNeutronFermiEnergy; 00083 00084 fermiEnergy[DeltaPlusPlus] = fermiEnergy.find(Proton)->second; 00085 fermiEnergy[DeltaPlus] = fermiEnergy.find(Proton)->second; 00086 fermiEnergy[DeltaZero] = fermiEnergy.find(Neutron)->second; 00087 fermiEnergy[DeltaMinus] = fermiEnergy.find(Neutron)->second; 00088 00089 const G4double theAverageSeparationEnergy = 0.5*(ParticleTable::getSeparationEnergy(Proton,theA,theZ)+ParticleTable::getSeparationEnergy(Neutron,theA,theZ)); 00090 separationEnergy[Proton] = theAverageSeparationEnergy; 00091 separationEnergy[Neutron] = theAverageSeparationEnergy; 00092 00093 // Use separation energies from the ParticleTable 00094 vNucleon = 0.5*(theProtonFermiEnergy + theNeutronFermiEnergy) + theAverageSeparationEnergy; 00095 vDelta = vNucleon; 00096 separationEnergy[DeltaPlusPlus] = vDelta - fermiEnergy.find(DeltaPlusPlus)->second; 00097 separationEnergy[DeltaPlus] = vDelta - fermiEnergy.find(DeltaPlus)->second; 00098 separationEnergy[DeltaZero] = vDelta - fermiEnergy.find(DeltaZero)->second; 00099 separationEnergy[DeltaMinus] = vDelta - fermiEnergy.find(DeltaMinus)->second; 00100 } 00101 00102 G4double NuclearPotentialConstant::computePotentialEnergy(const Particle *particle) const { 00103 00104 switch( particle->getType() ) 00105 { 00106 case Proton: 00107 case Neutron: 00108 return vNucleon; 00109 break; 00110 00111 case PiPlus: 00112 case PiZero: 00113 case PiMinus: 00114 return computePionPotentialEnergy(particle); 00115 break; 00116 00117 case DeltaPlusPlus: 00118 case DeltaPlus: 00119 case DeltaZero: 00120 case DeltaMinus: 00121 return vDelta; 00122 break; 00123 case UnknownParticle: 00124 ERROR("Trying to compute potential energy of an unknown particle."); 00125 return 0.0; 00126 break; 00127 default: 00128 ERROR("Trying to compute potential energy of a malformed particle."); 00129 return 0.0; 00130 break; 00131 } 00132 } 00133 00134 } 00135 } 00136