G4INCLNuclearPotentialEnergyIsospin.cc

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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 "G4INCLNuclearPotentialEnergyIsospin.hh"
00047 #include "G4INCLParticleTable.hh"
00048 #include "G4INCLGlobals.hh"
00049 
00050 namespace G4INCL {
00051 
00052   namespace NuclearPotential {
00053 
00054     const G4double NuclearPotentialEnergyIsospin::alpha= 0.223;
00055 
00056     // Constructors
00057     NuclearPotentialEnergyIsospin::NuclearPotentialEnergyIsospin(const G4int A, const G4int Z, const G4bool aPionPotential)
00058       : NuclearPotentialIsospin(A,Z,aPionPotential)
00059     {}
00060 
00061     // Destructor
00062     NuclearPotentialEnergyIsospin::~NuclearPotentialEnergyIsospin() {}
00063 
00064     G4double NuclearPotentialEnergyIsospin::computePotentialEnergy(const Particle *particle) const {
00065 
00066       const G4double v0 = NuclearPotentialIsospin::computePotentialEnergy(particle);
00067 
00068       if(particle->isNucleon()) {
00069         const G4double t = particle->getKineticEnergy();
00070         const G4double tf = getFermiEnergy(particle);
00071         // Constant potential for T<Tf
00072         if(t < tf)
00073           return v0;
00074 
00075         // Linear function for T>Tf
00076         const G4double v = v0 - alpha*(t-tf)/(1-alpha);
00077         return (v>0.0) ? v : 0.0; // return 0.0 if v is negative
00078       } else
00079         return v0;
00080     }
00081 
00082   }
00083 }
00084 

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