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28 // Hadronic Process: Nuclear De-excitation
29 // by D. Mancusi (6th October 2014)
30 //
31
32 #ifndef G4FissionLevelDensityParameterINCLXX_h
33 #define G4FissionLevelDensityParameterINCLXX_h 1
34
35 #include "G4VLevelDensityParameter.hh"
36
37 class G4NuclearLevelData;
38
39 /** \class G4FissionLevelDensityParameterINCLXX
40 * \brief Revised level-density parameter for fission after INCL++
41 * \author Davide Mancusi
42 * \date 6th October 2014
43 *
44 * This class contains a revised level-density parameter that works better than
45 * the standard one with the Li\`ege Intranuclear Cascade model (INCL++). The
46 * fit parameter is the ratio of the level-density parameters in the fission
47 * channel and in the neutron-evaporation channel. This is commonly known as
48 * af/an and is usually very close to 1.0. Variations of a few percent are
49 * likely to induce large factors in the fission probability, because of the
50 * exponential growth of the Fermi level density. The best values of af/an were
51 * empirically found to be about 1.02 for 1-GeV p+208Pb and 1.04 for 1-GeV
52 * p+U238. A linear interpolation was adopted between the two extreme values.
53 */
54
55 class G4NuclearLevelData;
56
57 class G4FissionLevelDensityParameterINCLXX : public G4VLevelDensityParameter
58 {
59 public:
60 explicit G4FissionLevelDensityParameterINCLXX();
61 virtual ~G4FissionLevelDensityParameterINCLXX();
62
63 private:
64 G4FissionLevelDensityParameterINCLXX(const G4FissionLevelDensityParameterINCLXX &right);
65 const G4FissionLevelDensityParameterINCLXX & operator=
66 (const G4FissionLevelDensityParameterINCLXX &right);
67 G4bool operator==(const G4FissionLevelDensityParameterINCLXX &right) const;
68 G4bool operator!=(const G4FissionLevelDensityParameterINCLXX &right) const;
69
70 public:
71 G4double LevelDensityParameter(G4int A, G4int Z, G4double U) const final;
72
73 void setAfanLow(const double a) { afanLow = a; UpdateAfanSlope(); }
74 void setAfanHigh(const double a) { afanHigh = a; UpdateAfanSlope(); }
75 void setZLow(const int z) { ZLow = z; UpdateAfanSlope(); }
76 void setZHigh(const int z) { ZHigh = z; UpdateAfanSlope(); }
77 double getAfanLow() const { return afanLow; }
78 double getAfanHigh() const { return afanHigh; }
79 int getZLow() const { return ZLow; }
80 int getZHigh() const { return ZHigh; }
81
82 private:
83
84 void UpdateAfanSlope();
85
86 G4NuclearLevelData* fNucData;
87
88 double afanLow, afanHigh;
89 int ZLow, ZHigh;
90 double afanSlope;
91
92 };
93
94
95 #endif
96