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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France 27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium 28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France 29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France 31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France 32 // Davide Mancusi, CEA-Saclay, France
33 // 33 //
34 #define INCLXX_IN_GEANT4_MODE 1 34 #define INCLXX_IN_GEANT4_MODE 1
35 35
36 #include "globals.hh" 36 #include "globals.hh"
37 37
38 /** \file G4INCLNuclearPotentialEnergyIsospinS 38 /** \file G4INCLNuclearPotentialEnergyIsospinSmooth.cc
39 * \brief Isospin- and energy-dependent nuclea 39 * \brief Isospin- and energy-dependent nuclear potential.
40 * 40 *
41 * Provides an isospin- and energy-dependent n 41 * Provides an isospin- and energy-dependent nuclear potential. The cusp at 200
42 * MeV is replaced by a smooth exponential. 42 * MeV is replaced by a smooth exponential.
43 * 43 *
44 * \date 16 February 2011 44 * \date 16 February 2011
45 * \author Davide Mancusi 45 * \author Davide Mancusi
46 */ 46 */
47 47
48 #include "G4INCLNuclearPotentialEnergyIsospinS 48 #include "G4INCLNuclearPotentialEnergyIsospinSmooth.hh"
49 #include "G4INCLParticleTable.hh" 49 #include "G4INCLParticleTable.hh"
50 #include "G4INCLGlobals.hh" 50 #include "G4INCLGlobals.hh"
51 51
52 namespace G4INCL { 52 namespace G4INCL {
53 53
54 namespace NuclearPotential { 54 namespace NuclearPotential {
55 55
56 const G4double NuclearPotentialEnergyIsosp 56 const G4double NuclearPotentialEnergyIsospinSmooth::alpha= 0.223;
57 const G4double NuclearPotentialEnergyIsosp 57 const G4double NuclearPotentialEnergyIsospinSmooth::deltaE= 25.;
58 58
59 // Constructors 59 // Constructors
60 NuclearPotentialEnergyIsospinSmooth::Nucle 60 NuclearPotentialEnergyIsospinSmooth::NuclearPotentialEnergyIsospinSmooth(const G4int A, const G4int Z, const G4bool aPionPotential)
61 : NuclearPotentialIsospin(A,Z,aPionPoten 61 : NuclearPotentialIsospin(A,Z,aPionPotential)
62 {} 62 {}
63 63
64 // Destructor 64 // Destructor
65 NuclearPotentialEnergyIsospinSmooth::~Nucl 65 NuclearPotentialEnergyIsospinSmooth::~NuclearPotentialEnergyIsospinSmooth() {}
66 66
67 G4double NuclearPotentialEnergyIsospinSmoo 67 G4double NuclearPotentialEnergyIsospinSmooth::computePotentialEnergy(const Particle *particle) const {
68 68
69 const G4double v0 = NuclearPotentialIsos 69 const G4double v0 = NuclearPotentialIsospin::computePotentialEnergy(particle);
70 70
71 if(particle->isNucleon()) { 71 if(particle->isNucleon()) {
72 const G4double t = particle->getKineti 72 const G4double t = particle->getKineticEnergy();
73 const G4double tf = getFermiEnergy(par 73 const G4double tf = getFermiEnergy(particle);
74 // Constant potential for T<Tf 74 // Constant potential for T<Tf
75 if(t < tf) 75 if(t < tf)
76 return v0; 76 return v0;
77 77
78 // Linear function for Tf<T<T0, expone 78 // Linear function for Tf<T<T0, exponential function for T>T0
79 const G4double t0 = tf + v0*(1.-alpha) 79 const G4double t0 = tf + v0*(1.-alpha)/alpha - deltaE; // deltaE before the linear potential vanishes
80 G4double v; 80 G4double v;
81 if(t<t0) { 81 if(t<t0) {
82 v = v0 - alpha*(t-tf)/(1.-alpha); 82 v = v0 - alpha*(t-tf)/(1.-alpha);
83 } else { 83 } else {
84 const G4double v_at_t0 = v0 - alpha* 84 const G4double v_at_t0 = v0 - alpha*(t0-tf)/(1.-alpha);
85 const G4double kappa = alpha / (v_at 85 const G4double kappa = alpha / (v_at_t0 * (1.-alpha));
86 v = v_at_t0 * std::exp(kappa * (t0-t 86 v = v_at_t0 * std::exp(kappa * (t0-t));
87 } 87 }
88 return (v>0.0) ? v : 0.0; 88 return (v>0.0) ? v : 0.0;
89 } else 89 } else
90 return v0; 90 return v0;
91 } 91 }
92 92
93 } 93 }
94 } 94 }
95 95
96 96