1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | // $Id: G4StatMFMacroTemperature.cc,v 1.7 2008/11/19 14:33:31 vnivanch Exp $ |
---|
28 | // GEANT4 tag $Name: geant4-09-02 $ |
---|
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) make algorithm closer to |
---|
37 | // original MF model |
---|
38 | |
---|
39 | #include "G4StatMFMacroTemperature.hh" |
---|
40 | |
---|
41 | // operators definitions |
---|
42 | G4StatMFMacroTemperature & |
---|
43 | G4StatMFMacroTemperature::operator=(const G4StatMFMacroTemperature & ) |
---|
44 | { |
---|
45 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator= meant to not be accessable"); |
---|
46 | return *this; |
---|
47 | } |
---|
48 | |
---|
49 | G4bool G4StatMFMacroTemperature::operator==(const G4StatMFMacroTemperature & ) const |
---|
50 | { |
---|
51 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator== meant to not be accessable"); |
---|
52 | return false; |
---|
53 | } |
---|
54 | |
---|
55 | |
---|
56 | G4bool G4StatMFMacroTemperature::operator!=(const G4StatMFMacroTemperature & ) const |
---|
57 | { |
---|
58 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator!= meant to not be accessable"); |
---|
59 | return true; |
---|
60 | } |
---|
61 | |
---|
62 | |
---|
63 | |
---|
64 | |
---|
65 | G4double G4StatMFMacroTemperature::CalcTemperature(void) |
---|
66 | { |
---|
67 | // Inital guess for the interval of the ensemble temperature values |
---|
68 | G4double Ta = 0.5; |
---|
69 | G4double Tb = std::max(std::sqrt(_ExEnergy/(theA*0.12)),0.01*MeV); |
---|
70 | |
---|
71 | G4double fTa = this->operator()(Ta); |
---|
72 | G4double fTb = this->operator()(Tb); |
---|
73 | |
---|
74 | // Bracketing the solution |
---|
75 | // T should be greater than 0. |
---|
76 | // The interval is [Ta,Tb] |
---|
77 | // We start with a value for Ta = 0.5 MeV |
---|
78 | // it should be enough to have fTa > 0 If it isn't |
---|
79 | // the case, we decrease Ta. But carefully, because |
---|
80 | // fTa growes very fast when Ta is near 0 and we could have |
---|
81 | // an overflow. |
---|
82 | |
---|
83 | G4int iterations = 0; |
---|
84 | while (fTa < 0.0 && iterations++ < 10) { |
---|
85 | Ta -= 0.5*Ta; |
---|
86 | fTa = this->operator()(Ta); |
---|
87 | } |
---|
88 | // Usually, fTb will be less than 0, but if it is not the case: |
---|
89 | iterations = 0; |
---|
90 | while (fTa*fTb > 0.0 && iterations++ < 10) { |
---|
91 | Tb += 2.*std::abs(Tb-Ta); |
---|
92 | fTb = this->operator()(Tb); |
---|
93 | } |
---|
94 | |
---|
95 | if (fTa*fTb > 0.0) { |
---|
96 | G4cerr <<"G4StatMFMacroTemperature:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
---|
97 | G4cerr <<"G4StatMFMacroTemperature:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
---|
98 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't bracket the solution."); |
---|
99 | } |
---|
100 | |
---|
101 | G4Solver<G4StatMFMacroTemperature> * theSolver = new G4Solver<G4StatMFMacroTemperature>(100,1.e-4); |
---|
102 | theSolver->SetIntervalLimits(Ta,Tb); |
---|
103 | if (!theSolver->Crenshaw(*this)){ |
---|
104 | G4cerr <<"G4StatMFMacroTemperature, Crenshaw method failed:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
---|
105 | G4cerr <<"G4StatMFMacroTemperature, Crenshaw method failed:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
---|
106 | } |
---|
107 | _MeanTemperature = theSolver->GetRoot(); |
---|
108 | G4double FunctionValureAtRoot = this->operator()(_MeanTemperature); |
---|
109 | delete theSolver; |
---|
110 | |
---|
111 | // Verify if the root is found and it is indeed within the physical domain, |
---|
112 | // say, between 1 and 50 MeV, otherwise try Brent method: |
---|
113 | if (_MeanTemperature < 1. || _MeanTemperature > 50. || std::abs(FunctionValureAtRoot) > 5.e-2) { |
---|
114 | G4cout << "Crenshaw method failed; function = " << FunctionValureAtRoot << " solution? = " << _MeanTemperature << " MeV " << G4endl; |
---|
115 | G4Solver<G4StatMFMacroTemperature> * theSolverBrent = new G4Solver<G4StatMFMacroTemperature>(200,1.e-3); |
---|
116 | theSolverBrent->SetIntervalLimits(Ta,Tb); |
---|
117 | if (!theSolverBrent->Brent(*this)){ |
---|
118 | G4cerr <<"G4StatMFMacroTemperature, Brent method failed:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
---|
119 | G4cerr <<"G4StatMFMacroTemperature, Brent method failed:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
---|
120 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't find the root with any method."); |
---|
121 | } |
---|
122 | |
---|
123 | _MeanTemperature = theSolverBrent->GetRoot(); |
---|
124 | FunctionValureAtRoot = this->operator()(_MeanTemperature); |
---|
125 | delete theSolverBrent; |
---|
126 | |
---|
127 | if (_MeanTemperature < 1. || _MeanTemperature > 50. || std::abs(FunctionValureAtRoot) > 5.e-2) { |
---|
128 | G4cout << "Brent method failed; function = " << FunctionValureAtRoot << " solution? = " << _MeanTemperature << " MeV " << G4endl; |
---|
129 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't find the root with any method."); |
---|
130 | } |
---|
131 | } |
---|
132 | |
---|
133 | return _MeanTemperature; |
---|
134 | } |
---|
135 | |
---|
136 | |
---|
137 | |
---|
138 | G4double G4StatMFMacroTemperature::FragsExcitEnergy(const G4double T) |
---|
139 | // Calculates excitation energy per nucleon and summed fragment multiplicity and entropy |
---|
140 | { |
---|
141 | |
---|
142 | // Model Parameters |
---|
143 | G4double R0 = G4StatMFParameters::Getr0()*std::pow(theA,1./3.); |
---|
144 | G4double R = R0*std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(), 1./3.); |
---|
145 | G4double FreeVol = _Kappa*(4.*pi/3.)*R0*R0*R0; |
---|
146 | |
---|
147 | |
---|
148 | // Calculate Chemical potentials |
---|
149 | CalcChemicalPotentialNu(T); |
---|
150 | |
---|
151 | |
---|
152 | // Average total fragment energy |
---|
153 | G4double AverageEnergy = 0.0; |
---|
154 | std::vector<G4VStatMFMacroCluster*>::iterator i; |
---|
155 | for (i = _theClusters->begin(); i != _theClusters->end(); ++i) |
---|
156 | { |
---|
157 | AverageEnergy += (*i)->GetMeanMultiplicity() * (*i)->CalcEnergy(T); |
---|
158 | } |
---|
159 | |
---|
160 | // Add Coulomb energy |
---|
161 | AverageEnergy += (3./5.)*elm_coupling*theZ*theZ/R; |
---|
162 | |
---|
163 | // Calculate mean entropy |
---|
164 | _MeanEntropy = 0.0; |
---|
165 | for (i = _theClusters->begin(); i != _theClusters->end(); ++i) |
---|
166 | { |
---|
167 | _MeanEntropy += (*i)->CalcEntropy(T,FreeVol); |
---|
168 | } |
---|
169 | |
---|
170 | // Excitation energy per nucleon |
---|
171 | G4double FragsExcitEnergy = AverageEnergy - _FreeInternalE0; |
---|
172 | |
---|
173 | return FragsExcitEnergy; |
---|
174 | |
---|
175 | } |
---|
176 | |
---|
177 | |
---|
178 | void G4StatMFMacroTemperature::CalcChemicalPotentialNu(const G4double T) |
---|
179 | // Calculates the chemical potential \nu |
---|
180 | |
---|
181 | { |
---|
182 | G4StatMFMacroChemicalPotential * theChemPot = new |
---|
183 | G4StatMFMacroChemicalPotential(theA,theZ,_Kappa,T,_theClusters); |
---|
184 | |
---|
185 | |
---|
186 | _ChemPotentialNu = theChemPot->CalcChemicalPotentialNu(); |
---|
187 | _ChemPotentialMu = theChemPot->GetChemicalPotentialMu(); |
---|
188 | _MeanMultiplicity = theChemPot->GetMeanMultiplicity(); |
---|
189 | |
---|
190 | delete theChemPot; |
---|
191 | |
---|
192 | return; |
---|
193 | |
---|
194 | } |
---|
195 | |
---|
196 | |
---|