Geant4_10
G4StatMFMacroTetraNucleon.cc
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27 // $Id: G4StatMFMacroTetraNucleon.cc 68724 2013-04-05 09:26:32Z gcosmo $
28 //
29 // Hadronic Process: Nuclear De-excitations
30 // by V. Lara
31 
33 #include "G4PhysicalConstants.hh"
34 #include "G4SystemOfUnits.hh"
35 
38 {}
39 
41 {}
42 
43 G4double
45  const G4double mu,
46  const G4double nu,
47  const G4double T)
48 {
49  G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
50  G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
51  static const G4double degeneracy = 1; // He4
52  const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
53  (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
54 
55  //old value was 30.11*MeV
57 
58  G4double exponent = (BindingE + theA*(mu+nu*theZARatio+T*T/_InvLevelDensity)
59  - Coulomb*theZARatio*theZARatio*
60  std::pow(static_cast<G4double>(theA),5./3.))/T;
61  if (exponent > 700.0) exponent = 700.0;
62 
63  _MeanMultiplicity = ( degeneracy*FreeVol*theA*
64  std::sqrt(static_cast<G4double>(theA))/lambda3)*
65  std::exp(exponent);
66 
67  return _MeanMultiplicity;
68 }
69 
70 
72 {
73  G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
74  (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
75 
77  Coulomb * theZARatio * theZARatio *
78  std::pow(static_cast<G4double>(theA),5./3.) +
79  (3./2.) * T +
80  theA * T*T/_InvLevelDensity;
81 
82 }
83 
84 G4double
86  const G4double FreeVol)
87 {
88  G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
89  G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
90 
91  G4double Entropy = 0.0;
92  if (_MeanMultiplicity > 0.0)
93  Entropy = _MeanMultiplicity*(5./2.+
94  std::log(8.0*FreeVol/(lambda3*_MeanMultiplicity)))+ // 8 = theA*std::sqrt(theA)
95  8.0*T/_InvLevelDensity;
96 
97  return Entropy;
98 }
G4double CalcEnergy(const G4double T)
static G4double GetKappaCoulomb()
tuple elm_coupling
Definition: hepunit.py:286
static G4double Getr0()
G4double CalcMeanMultiplicity(const G4double FreeVol, const G4double mu, const G4double nu, const G4double T)
G4double CalcEntropy(const G4double T, const G4double FreeVol)
static G4double GetBindingEnergy(const G4int A, const G4int Z)
double G4double
Definition: G4Types.hh:76