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25 //
26 //
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara
30
31
32 #include "G4StatMFParameters.hh"
33 #include "G4SystemOfUnits.hh"
34 #include "G4PhysicalConstants.hh"
35
36 const G4double G4StatMFParameters::fKappa = 1.0; // dimensionless
37
38 const G4double G4StatMFParameters::fKappaCoulomb = 2.0; // dimensionless
39
40 const G4double G4StatMFParameters::fEpsilon0 = 16.0*MeV;
41
42 // Bethe-Weizsacker coefficients
43 const G4double G4StatMFParameters::fE0 = 16.0*MeV;
44
45 const G4double G4StatMFParameters::fBeta0 = 18.0*MeV;
46
47 const G4double G4StatMFParameters::fGamma0 = 25.0*MeV;
48
49 // Critical temperature (for liquid-gas phase transitions)
50 const G4double G4StatMFParameters::fCriticalTemp = 18.0*MeV;
51
52 // Nuclear radius
53 const G4double G4StatMFParameters::fr0 = 1.17*fermi;
54
55 const G4double G4StatMFParameters::fCoulomb = 0.6*(CLHEP::elm_coupling/fr0)*
56 (1.0 - 1.0/std::pow(1.0+fKappaCoulomb,1./3.));
57
58 G4StatMFParameters::G4StatMFParameters()
59 {}
60
61 G4StatMFParameters::~G4StatMFParameters()
62 {}
63
64 G4double G4StatMFParameters::GetKappa()
65 {
66 return fKappa;
67 }
68
69 G4double G4StatMFParameters::GetKappaCoulomb()
70 {
71 return fKappaCoulomb;
72 }
73
74 G4double G4StatMFParameters::GetEpsilon0()
75 {
76 return fEpsilon0;
77 }
78
79 G4double G4StatMFParameters::GetE0()
80 {
81 return fE0;
82 }
83
84 G4double G4StatMFParameters::GetBeta0()
85 {
86 return fBeta0;
87 }
88
89 G4double G4StatMFParameters::GetGamma0()
90 {
91 return fGamma0;
92 }
93
94 G4double G4StatMFParameters::GetCriticalTemp()
95 {
96 return fCriticalTemp;
97 }
98
99 G4double G4StatMFParameters::Getr0()
100 {
101 return fr0;
102 }
103
104 G4double G4StatMFParameters::GetCoulomb()
105 {
106 return fCoulomb;
107 }
108
109 G4double G4StatMFParameters::Beta(G4double T)
110 {
111 G4double res = 0.0;
112 if (T < fCriticalTemp) {
113 G4double CriticalTempSqr = fCriticalTemp*fCriticalTemp;
114 G4double TempSqr = T*T;
115 G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr);
116
117 res = fBeta0*tmp*std::pow(tmp,0.25);
118 }
119 return res;
120 }
121
122 G4double G4StatMFParameters::DBetaDT(G4double T)
123 {
124 G4double res = 0.0;
125 if (T < fCriticalTemp) {
126 G4double CriticalTempSqr = fCriticalTemp*fCriticalTemp;
127 G4double TempSqr = T*T;
128 G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr);
129
130 res = -5.0*fBeta0*std::pow(tmp,0.25)*(CriticalTempSqr*T)/
131 ((CriticalTempSqr+TempSqr)*(CriticalTempSqr+TempSqr));
132 }
133 return res;
134 }
135
136 G4double
137 G4StatMFParameters::GetMaxAverageMultiplicity(G4int A)
138 {
139 // Maximun average multiplicity: M_0 = 2.6 for A ~ 200
140 // and M_0 = 3.3 for A <= 110
141 G4double MaxAverageMultiplicity = 2.6;
142 if (A <= 110) { MaxAverageMultiplicity = 3.3; }
143 return MaxAverageMultiplicity;
144 }
145
146