Geant4_10
G4StatMFMacroNucleon.cc
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27 // $Id: G4StatMFMacroNucleon.cc 68724 2013-04-05 09:26:32Z gcosmo $
28 //
29 // Hadronic Process: Nuclear De-excitations
30 // by V. Lara
31 
32 #include "G4StatMFMacroNucleon.hh"
33 #include "G4PhysicalConstants.hh"
34 #include "G4SystemOfUnits.hh"
35 
37  : G4VStatMFMacroCluster(1), _NeutronMeanMultiplicity(0.0),
38  _ProtonMeanMultiplicity(0.0)
39 {}
40 
42 {}
43 
44 G4double
46  const G4double mu,
47  const G4double nu, const G4double T)
48 {
49  if (T <= 0.0) {
50  throw G4HadronicException(__FILE__, __LINE__,
51  "G4StatMFMacroNucleon::CalcMeanMultiplicity: Temperature less or equal 0");
52  }
53 
54  G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
55 
56  G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
57 
58  static const G4double degeneracy = 2.0;
59 
60  G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
61  (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
62 
63  G4double exponent_proton = (mu+nu-Coulomb)/T;
64  G4double exponent_neutron = mu/T;
65 
66  if (exponent_neutron > 700.0) exponent_neutron = 700.0;
67  if (exponent_proton > 700.0) exponent_proton = 700.0;
68 
69  _NeutronMeanMultiplicity =
70  (degeneracy*FreeVol/lambda3)*std::exp(exponent_neutron);
71 
72  _ProtonMeanMultiplicity =
73  (degeneracy*FreeVol/lambda3)*std::exp(exponent_proton);
74 
75  return _MeanMultiplicity = _NeutronMeanMultiplicity + _ProtonMeanMultiplicity;
76 }
77 
78 
80 {
81  G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
82  (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
83 
84  return _Energy = Coulomb * theZARatio * theZARatio + (3./2.) * T;
85 }
86 
87 G4double
89 {
90  G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
91  G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
92 
93  G4double NeutronEntropy = 0.0;
94  if (_NeutronMeanMultiplicity > 0.0)
95  NeutronEntropy = _NeutronMeanMultiplicity*(5./2.+
96  std::log(2.0*static_cast<G4double>(theA)*FreeVol/
97  (lambda3*_NeutronMeanMultiplicity)));
98 
99  G4double ProtonEntropy = 0.0;
100  if (_ProtonMeanMultiplicity > 0.0)
101  ProtonEntropy = _ProtonMeanMultiplicity*(5./2.+
102  std::log(2.0*static_cast<G4double>(theA)*FreeVol/
103  (lambda3*_ProtonMeanMultiplicity)));
104 
105  return NeutronEntropy+ProtonEntropy;
106 }
107 
G4double CalcMeanMultiplicity(const G4double FreeVol, const G4double mu, const G4double nu, const G4double T)
static G4double GetKappaCoulomb()
G4double CalcEnergy(const G4double T)
tuple elm_coupling
Definition: hepunit.py:286
static G4double Getr0()
G4double CalcEntropy(const G4double T, const G4double FreeVol)
double G4double
Definition: G4Types.hh:76