source: trunk/source/processes/hadronic/models/de_excitation/multifragmentation/src/G4StatMFMacroMultiNucleon.cc@ 1199

Last change on this file since 1199 was 1196, checked in by garnier, 16 years ago

update CVS release candidate geant4.9.3.01
File size: 6.6 KB
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26//
27// $Id: G4StatMFMacroMultiNucleon.cc,v 1.7 2008/11/19 14:33:31 vnivanch Exp $
28// GEANT4 tag $Name: geant4-09-03-cand-01 $
29//
30// Hadronic Process: Nuclear De-excitations
31// by V. Lara
32//
33// Modified:
34// 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor
35// Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute,
36// Moscow, pshenich@fias.uni-frankfurt.de) fixed computation of the
37// symmetry energy
38
39#include "G4StatMFMacroMultiNucleon.hh"
40
41// Default constructor
42G4StatMFMacroMultiNucleon::
43G4StatMFMacroMultiNucleon() :
44 G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private
45{
46 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::default_constructor meant to not be accessable");
47}
48
49// Copy constructor
50G4StatMFMacroMultiNucleon::
51G4StatMFMacroMultiNucleon(const G4StatMFMacroMultiNucleon & ) :
52 G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private
53{
54 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::copy_constructor meant to not be accessable");
55}
56
57// Operators
58
59G4StatMFMacroMultiNucleon & G4StatMFMacroMultiNucleon::
60operator=(const G4StatMFMacroMultiNucleon & )
61{
62 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator= meant to not be accessable");
63 return *this;
64}
65
66
67G4bool G4StatMFMacroMultiNucleon::operator==(const G4StatMFMacroMultiNucleon & ) const
68{
69 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator== meant to not be accessable");
70 return false;
71}
72
73
74G4bool G4StatMFMacroMultiNucleon::operator!=(const G4StatMFMacroMultiNucleon & ) const
75{
76 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator!= meant to not be accessable");
77 return true;
78}
79
80
81
82G4double G4StatMFMacroMultiNucleon::CalcMeanMultiplicity(const G4double FreeVol, const G4double mu,
83 const G4double nu, const G4double T)
84{
85 const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
86
87 const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
88
89 const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.);
90
91 const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
92 (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
93
94 G4double exponent = (mu + nu*theZARatio+ G4StatMFParameters::GetE0() + T*T/_InvLevelDensity
95 - G4StatMFParameters::GetGamma0()*(1.0 - 2.0*theZARatio)*
96 (1.0 - 2.0*theZARatio))*theA
97 - G4StatMFParameters::Beta(T)*A23 - Coulomb*theZARatio*theZARatio*A23*theA;
98
99 exponent /= T;
100
101 if (exponent > 30.0) exponent = 30.0;
102
103 _MeanMultiplicity = std::max((FreeVol * static_cast<G4double>(theA) *
104 std::sqrt(static_cast<G4double>(theA))/lambda3) *
105 std::exp(exponent),1.0e-30);
106 return _MeanMultiplicity;
107}
108
109
110G4double G4StatMFMacroMultiNucleon::CalcZARatio(const G4double nu)
111{
112 const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
113 (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
114
115 G4double den = 8.0*G4StatMFParameters::GetGamma0()+2.0*Coulomb*std::pow(static_cast<G4double>(theA),2./3.);
116 G4double num = 4.0*G4StatMFParameters::GetGamma0()+nu;
117
118 return theZARatio = num/den;
119
120
121}
122
123
124
125G4double G4StatMFMacroMultiNucleon::CalcEnergy(const G4double T)
126{
127 const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
128 (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
129
130 const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.);
131
132 // Volume term
133 G4double EVol = static_cast<G4double>(theA) * (T*T/_InvLevelDensity - G4StatMFParameters::GetE0());
134
135 // Symmetry term
136 G4double ESym = static_cast<G4double>(theA) * G4StatMFParameters::GetGamma0() *(1. - 2.* theZARatio) * (1. - 2.* theZARatio);
137
138 // Surface term
139 G4double ESurf = A23*(G4StatMFParameters::Beta(T) - T*G4StatMFParameters::DBetaDT(T));
140
141 // Coulomb term
142 G4double ECoul = Coulomb*A23*static_cast<G4double>(theA)*theZARatio*theZARatio;
143
144 // Translational term
145 G4double ETrans = (3./2.)*T;
146
147
148 return _Energy = EVol + ESurf + ECoul + ETrans + ESym;
149}
150
151
152G4double G4StatMFMacroMultiNucleon::CalcEntropy(const G4double T, const G4double FreeVol)
153{
154 const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
155 const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
156
157 G4double Entropy = 0.0;
158 if (_MeanMultiplicity > 0.0) {
159 // Volume term
160 G4double SV = 2.0*static_cast<G4double>(theA)*T/_InvLevelDensity;
161
162 // Surface term
163 G4double SS = -G4StatMFParameters::DBetaDT(T)*std::pow(static_cast<G4double>(theA),2./3.);
164
165 // Translational term
166 G4double ST = (5./2.)+std::log(FreeVol * std::sqrt(static_cast<G4double>(theA)) *
167 static_cast<G4double>(theA)/(lambda3*_MeanMultiplicity));
168
169
170 Entropy = _MeanMultiplicity*(SV + SS + ST);
171 }
172
173
174 return Entropy;
175}
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