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26 /*
27 * File: G4FPYBiasedLightFragmentDist.hh
28 * Author: B. Wendt (wendbryc@isu.edu)
29 *
30 * Created on June 2, 2011, 11:02 AM
31 */
32
33 #ifndef G4FPYBIASEDLIGHTFRAGMENTDIST_HH
34 #define G4FPYBIASEDLIGHTFRAGMENTDIST_HH
35
36 #include "G4FFGEnumerations.hh"
37 #include "G4FissionProductYieldDist.hh"
38 #include "G4Ions.hh"
39 #include "globals.hh"
40
41 /** G4FPYBiasedLightFragmentDist is an inherited class of G4FissionProductYield
42 * that only samples the 'light' fission fragments, defined by A \< 115
43 * - This inherited class of G4FissionProductYield samples only the lighter
44 * fission fragments, defined by A \< 115
45 * - This biasing was implemented because of an artifact that is introduced
46 * due to random sampling of fission fragments. Typically small fission
47 * fragments (neutrons, alphas, gammas) are sampled after the first
48 * fragment is sampled. If a heavy fragment (A \>= 115) is sampled first
49 * then the resulting lighter fission fragment, after all the other
50 * particles have been removed from the available mass, will most likely
51 * land far off the neutron drip line.
52 * - This implementation reduces the probability that such an improbable
53 * nucleus will be created by first sampling the lighter fission fragment
54 * and allowing the heavy fission fragment, which has a lot more
55 * flexibility for varying neutron populations, to make up the slack.
56 */
57 class G4FPYBiasedLightFragmentDist : public G4FissionProductYieldDist
58 {
59 public:
60 // Constructor definition
61 /** Default constructor
62 * - Usage:
63 * - \p WhichIsotope: Isotope number of the element in ZZZAAA form
64 * - \p WhichMetaState: \p GROUND_STATE, \p META_1, or \p META_2
65 * - \p WhichCause: \p SPONTANEOUS or \p N_INDUCED
66 * - \p WhichYieldType: \p INDEPENDENT or \p CUMULATIVE
67 *
68 * - Notes:
69 */
70 G4FPYBiasedLightFragmentDist(G4int WhichIsotope, G4FFGEnumerations::MetaState WhichMetaState,
71 G4FFGEnumerations::FissionCause WhichCause,
72 G4FFGEnumerations::YieldType WhichYieldType,
73 std::istringstream& dataStream);
74 /** Overloaded constructor
75 * - Usage:
76 * - \p WhichIsotope: Isotope number of the element in ZZZAAA form
77 * - \p WhichMetaState: \p GROUND_STATE, \p META_1, or \p META_2
78 * - \p WhichCause: \p SPONTANEOUS or \p N_INDUCED
79 * - \p WhichYieldType: \p INDEPENDENT or \p CUMULATIVE
80 * - \p Verbosity: Verbosity level
81 *
82 * - Notes:
83 */
84 G4FPYBiasedLightFragmentDist(G4int WhichIsotope, G4FFGEnumerations::MetaState WhichMetaState,
85 G4FFGEnumerations::FissionCause WhichCause,
86 G4FFGEnumerations::YieldType WhichYieldType, G4int Verbosity,
87 std::istringstream& dataStream);
88
89 protected:
90 /** Initialize is a common function called by all constructors. */
91 void Initialize();
92
93 protected:
94 // Variables
95 /** Defines the half-weight of the fission isotope */
96 G4int HalfWeight_;
97 // Functions
98 /** Selects a fission product from the probability tree, limited by the
99 * number of nucleons available to the system
100 */
101 G4Ions* GetFissionProduct() override;
102
103 // Destructor function(s)
104 public:
105 /** Default deconstructor. It is a virtual function since
106 * G4FPYBiasedLightFragmentDist inherits from G4FissionProductYieldDist
107 */
108 ~G4FPYBiasedLightFragmentDist() override;
109 };
110
111 #endif /* G4FPYBIASEDLIGHTFRAGMENTDIST_HH */
112