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25 //
26 //
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara
30
31 #include "G4StatMFMacroBiNucleon.hh"
32 #include "G4StatMFParameters.hh"
33 #include "G4PhysicalConstants.hh"
34 #include "G4SystemOfUnits.hh"
35 #include "G4Log.hh"
36 #include "G4Exp.hh"
37 #include "G4Pow.hh"
38
39 // Operators
40
41 static const G4double degeneracy = 3.0;
42
43 G4StatMFMacroBiNucleon & G4StatMFMacroBiNucleon::
44 operator=(const G4StatMFMacroBiNucleon & )
45 {
46 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator= meant to not be accessible");
47 return *this;
48 }
49
50 G4bool G4StatMFMacroBiNucleon::operator==(const G4StatMFMacroBiNucleon & ) const
51 {
52 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator== meant to not be accessible");
53 return false;
54 }
55
56
57 G4bool G4StatMFMacroBiNucleon::operator!=(const G4StatMFMacroBiNucleon & ) const
58 {
59 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator!= meant to not be accessible");
60 return true;
61 }
62
63 G4double G4StatMFMacroBiNucleon::CalcMeanMultiplicity(const G4double FreeVol,
64 const G4double mu,
65 const G4double nu,
66 const G4double T)
67 {
68 G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
69 G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
70
71 const G4double BindingE = G4NucleiProperties::GetBindingEnergy(theA,1);
72 //old value was 2.796*MeV
73 G4double exponent = (BindingE + theA*(mu+nu*theZARatio) -
74 G4StatMFParameters::GetCoulomb()*theZARatio*theZARatio*theA
75 *G4Pow::GetInstance()->Z23(theA))/T;
76
77 // To avoid numerical problems
78 if (exponent < -300.0) exponent = -300.0;
79 else if (exponent > 300.0) exponent = 300.0;
80
81 _MeanMultiplicity = (degeneracy*FreeVol*theA*std::sqrt((G4double)theA)/lambda3)*
82 G4Exp(exponent);
83
84 return _MeanMultiplicity;
85 }
86
87 G4double G4StatMFMacroBiNucleon::CalcEnergy(const G4double T)
88 {
89 _Energy = -G4NucleiProperties::GetBindingEnergy(theA,1) +
90 G4StatMFParameters::GetCoulomb() * theZARatio * theZARatio
91 * theA*G4Pow::GetInstance()->Z23(theA) + 1.5*T;
92
93 return _Energy;
94 }
95
96 G4double G4StatMFMacroBiNucleon::CalcEntropy(const G4double T, const G4double FreeVol)
97 {
98 G4double Entropy = 0.0;
99 if (_MeanMultiplicity > 0.0) {
100 G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
101 G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
102 // Is this formula correct?
103 Entropy = _MeanMultiplicity*(2.5+G4Log(3.0*theA*std::sqrt((G4double)theA)*FreeVol
104 /(lambda3*_MeanMultiplicity)));
105 }
106 return Entropy;
107 }
108