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26 //
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara (Oct 1998)
30
31 #ifndef G4CompetitiveFission_h
32 #define G4CompetitiveFission_h 1
33
34 #include "G4VEvaporationChannel.hh"
35 #include "G4Fragment.hh"
36 #include "G4VEmissionProbability.hh"
37 #include "G4FissionParameters.hh"
38 #include <CLHEP/Units/SystemOfUnits.h>
39 #include "G4Exp.hh"
40
41 class G4VFissionBarrier;
42 class G4VEmissionProbability;
43 class G4VLevelDensityParameter;
44 class G4PairingCorrection;
45
46 class G4CompetitiveFission : public G4VEvaporationChannel
47 {
48 public:
49
50 G4CompetitiveFission();
51 ~G4CompetitiveFission() override;
52
53 void Initialise() override;
54
55 G4Fragment* EmittedFragment(G4Fragment* theNucleus) override;
56
57 G4double GetEmissionProbability(G4Fragment* theNucleus) override;
58
59 void SetFissionBarrier(G4VFissionBarrier * aBarrier);
60
61 void SetEmissionStrategy(G4VEmissionProbability * aFissionProb);
62
63 void SetLevelDensityParameter(G4VLevelDensityParameter * aLevelDensity);
64
65 inline G4double GetFissionBarrier(void) const;
66
67 inline G4double GetLevelDensityParameter(void) const;
68
69 inline G4double GetMaximalKineticEnergy(void) const;
70
71 G4CompetitiveFission(const G4CompetitiveFission &right) = delete;
72 const G4CompetitiveFission & operator=(const G4CompetitiveFission &right) = delete;
73 G4bool operator==(const G4CompetitiveFission &right) const = delete;
74 G4bool operator!=(const G4CompetitiveFission &right) const = delete;
75
76 private:
77
78 // Sample AtomicNumber of Fission products
79 G4int FissionAtomicNumber(G4int A);
80
81 G4double MassDistribution(G4double x, G4int A);
82
83 // Sample Charge of fission products
84 G4int FissionCharge(G4int A, G4int Z, G4double Af);
85
86 // Sample Kinetic energy of fission products
87 G4double FissionKineticEnergy(G4int A, G4int Z,
88 G4int Af1, G4int Zf1,
89 G4int Af2, G4int Zf2,
90 G4double U, G4double Tmax);
91
92 inline G4double Ratio(G4double A, G4double A11,
93 G4double B1, G4double A00) const;
94
95 inline G4double SymmetricRatio(G4int A, G4double A11) const;
96
97 inline G4double AsymmetricRatio(G4int A, G4double A11) const;
98
99 inline G4double LocalExp(G4double x) const;
100
101 // Maximal Kinetic Energy that can be carried by fragment
102 G4double maxKineticEnergy{0.0};
103 G4double fissionBarrier{0.0};
104 G4double fissionProbability{0.0};
105 G4double fFactor{1.0};
106
107 // For Fission barrier
108 G4VFissionBarrier* theFissionBarrierPtr;
109
110 // For Fission probability emission
111 G4VEmissionProbability* theFissionProbabilityPtr;
112
113 // For Level Density calculation
114 G4VLevelDensityParameter* theLevelDensityPtr;
115 G4PairingCorrection* pairingCorrection;
116
117 G4bool myOwnFissionProbability{true};
118 G4bool myOwnFissionBarrier{true};
119 G4bool myOwnLevelDensity{true};
120
121 G4FissionParameters theParam;
122
123 G4int theSecID; // Creator model ID for the secondaries created by this model
124 G4bool isInitialised{false};
125 };
126
127 inline G4double G4CompetitiveFission::GetFissionBarrier(void) const
128 {
129 return fissionBarrier;
130 }
131
132 inline G4double G4CompetitiveFission::GetMaximalKineticEnergy(void) const
133 {
134 return maxKineticEnergy;
135 }
136
137 inline
138 G4double G4CompetitiveFission::Ratio(G4double A, G4double A11,
139 G4double B1, G4double A00) const
140 {
141 G4double res;
142 if (A11 >= A*0.5 && A11 <= (A00+10.0)) {
143 G4double x = (A11-A00)/A;
144 res = 1.0 - B1*x*x;
145 } else {
146 G4double x = 10.0/A;
147 res = 1.0 - B1*x*x - 2.0*x*B1*(A11-A00-10.0)/A;
148 }
149 return res;
150 }
151
152 inline
153 G4double G4CompetitiveFission::AsymmetricRatio(G4int A, G4double A11) const
154 {
155 return Ratio(G4double(A),A11,23.5,134.0);
156 }
157
158 inline
159 G4double G4CompetitiveFission::SymmetricRatio(G4int A, G4double A11) const
160 {
161 G4double A0 = G4double(A);
162 return Ratio(A0,A11,5.32,A0*0.5);
163 }
164
165 inline G4double G4CompetitiveFission::LocalExp(G4double x) const
166 {
167 return (std::abs(x) < 8.) ? G4Exp(-0.5*x*x) : 0.0;
168 }
169
170 #endif
171
172
173