[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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[962] | 27 | // $Id: G4StatMFMacroTemperature.cc,v 1.7 2008/11/19 14:33:31 vnivanch Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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[819] | 29 | // |
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| 30 | // Hadronic Process: Nuclear De-excitations |
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| 31 | // by V. Lara |
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[962] | 32 | // |
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| 33 | // Modified: |
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| 34 | // 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor |
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| 35 | // Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute, |
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| 36 | // Moscow, pshenich@fias.uni-frankfurt.de) make algorithm closer to |
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| 37 | // original MF model |
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[819] | 38 | |
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| 39 | #include "G4StatMFMacroTemperature.hh" |
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| 40 | |
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| 41 | // operators definitions |
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| 42 | G4StatMFMacroTemperature & |
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| 43 | G4StatMFMacroTemperature::operator=(const G4StatMFMacroTemperature & ) |
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| 44 | { |
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| 45 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator= meant to not be accessable"); |
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| 46 | return *this; |
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| 47 | } |
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| 48 | |
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| 49 | G4bool G4StatMFMacroTemperature::operator==(const G4StatMFMacroTemperature & ) const |
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| 50 | { |
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| 51 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator== meant to not be accessable"); |
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| 52 | return false; |
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| 53 | } |
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| 54 | |
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| 55 | |
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| 56 | G4bool G4StatMFMacroTemperature::operator!=(const G4StatMFMacroTemperature & ) const |
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| 57 | { |
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| 58 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::operator!= meant to not be accessable"); |
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| 59 | return true; |
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| 60 | } |
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| 61 | |
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| 62 | |
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| 63 | |
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| 64 | |
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| 65 | G4double G4StatMFMacroTemperature::CalcTemperature(void) |
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| 66 | { |
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[962] | 67 | // Inital guess for the interval of the ensemble temperature values |
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| 68 | G4double Ta = 0.5; |
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[819] | 69 | G4double Tb = std::max(std::sqrt(_ExEnergy/(theA*0.12)),0.01*MeV); |
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| 70 | |
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| 71 | G4double fTa = this->operator()(Ta); |
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| 72 | G4double fTb = this->operator()(Tb); |
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| 73 | |
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| 74 | // Bracketing the solution |
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| 75 | // T should be greater than 0. |
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| 76 | // The interval is [Ta,Tb] |
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[962] | 77 | // We start with a value for Ta = 0.5 MeV |
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[819] | 78 | // it should be enough to have fTa > 0 If it isn't |
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| 79 | // the case, we decrease Ta. But carefully, because |
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| 80 | // fTa growes very fast when Ta is near 0 and we could have |
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| 81 | // an overflow. |
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| 82 | |
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| 83 | G4int iterations = 0; |
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| 84 | while (fTa < 0.0 && iterations++ < 10) { |
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| 85 | Ta -= 0.5*Ta; |
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| 86 | fTa = this->operator()(Ta); |
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| 87 | } |
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| 88 | // Usually, fTb will be less than 0, but if it is not the case: |
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| 89 | iterations = 0; |
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| 90 | while (fTa*fTb > 0.0 && iterations++ < 10) { |
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[962] | 91 | Tb += 2.*std::abs(Tb-Ta); |
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[819] | 92 | fTb = this->operator()(Tb); |
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| 93 | } |
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| 94 | |
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| 95 | if (fTa*fTb > 0.0) { |
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[962] | 96 | G4cerr <<"G4StatMFMacroTemperature:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
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| 97 | G4cerr <<"G4StatMFMacroTemperature:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
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| 98 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't bracket the solution."); |
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[819] | 99 | } |
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| 100 | |
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| 101 | G4Solver<G4StatMFMacroTemperature> * theSolver = new G4Solver<G4StatMFMacroTemperature>(100,1.e-4); |
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| 102 | theSolver->SetIntervalLimits(Ta,Tb); |
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[962] | 103 | if (!theSolver->Crenshaw(*this)){ |
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| 104 | G4cerr <<"G4StatMFMacroTemperature, Crenshaw method failed:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
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| 105 | G4cerr <<"G4StatMFMacroTemperature, Crenshaw method failed:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
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| 106 | } |
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[819] | 107 | _MeanTemperature = theSolver->GetRoot(); |
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[962] | 108 | G4double FunctionValureAtRoot = this->operator()(_MeanTemperature); |
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| 109 | delete theSolver; |
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| 110 | |
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| 111 | // Verify if the root is found and it is indeed within the physical domain, |
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| 112 | // say, between 1 and 50 MeV, otherwise try Brent method: |
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| 113 | if (_MeanTemperature < 1. || _MeanTemperature > 50. || std::abs(FunctionValureAtRoot) > 5.e-2) { |
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| 114 | G4cout << "Crenshaw method failed; function = " << FunctionValureAtRoot << " solution? = " << _MeanTemperature << " MeV " << G4endl; |
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| 115 | G4Solver<G4StatMFMacroTemperature> * theSolverBrent = new G4Solver<G4StatMFMacroTemperature>(200,1.e-3); |
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| 116 | theSolverBrent->SetIntervalLimits(Ta,Tb); |
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| 117 | if (!theSolverBrent->Brent(*this)){ |
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| 118 | G4cerr <<"G4StatMFMacroTemperature, Brent method failed:"<<" Ta="<<Ta<<" Tb="<<Tb<< G4endl; |
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| 119 | G4cerr <<"G4StatMFMacroTemperature, Brent method failed:"<<" fTa="<<fTa<<" fTb="<<fTb<< G4endl; |
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| 120 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't find the root with any method."); |
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| 121 | } |
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| 122 | |
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| 123 | _MeanTemperature = theSolverBrent->GetRoot(); |
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| 124 | FunctionValureAtRoot = this->operator()(_MeanTemperature); |
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| 125 | delete theSolverBrent; |
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| 126 | |
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| 127 | if (_MeanTemperature < 1. || _MeanTemperature > 50. || std::abs(FunctionValureAtRoot) > 5.e-2) { |
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| 128 | G4cout << "Brent method failed; function = " << FunctionValureAtRoot << " solution? = " << _MeanTemperature << " MeV " << G4endl; |
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| 129 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTemperature::CalcTemperature: I couldn't find the root with any method."); |
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| 130 | } |
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| 131 | } |
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| 132 | |
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[819] | 133 | return _MeanTemperature; |
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| 134 | } |
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| 135 | |
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| 136 | |
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| 137 | |
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| 138 | G4double G4StatMFMacroTemperature::FragsExcitEnergy(const G4double T) |
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| 139 | // Calculates excitation energy per nucleon and summed fragment multiplicity and entropy |
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| 140 | { |
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| 141 | |
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| 142 | // Model Parameters |
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| 143 | G4double R0 = G4StatMFParameters::Getr0()*std::pow(theA,1./3.); |
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| 144 | G4double R = R0*std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(), 1./3.); |
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| 145 | G4double FreeVol = _Kappa*(4.*pi/3.)*R0*R0*R0; |
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| 146 | |
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| 147 | |
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| 148 | // Calculate Chemical potentials |
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| 149 | CalcChemicalPotentialNu(T); |
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| 150 | |
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| 151 | |
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| 152 | // Average total fragment energy |
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| 153 | G4double AverageEnergy = 0.0; |
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| 154 | std::vector<G4VStatMFMacroCluster*>::iterator i; |
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| 155 | for (i = _theClusters->begin(); i != _theClusters->end(); ++i) |
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| 156 | { |
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| 157 | AverageEnergy += (*i)->GetMeanMultiplicity() * (*i)->CalcEnergy(T); |
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| 158 | } |
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| 159 | |
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| 160 | // Add Coulomb energy |
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| 161 | AverageEnergy += (3./5.)*elm_coupling*theZ*theZ/R; |
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| 162 | |
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| 163 | // Calculate mean entropy |
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| 164 | _MeanEntropy = 0.0; |
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| 165 | for (i = _theClusters->begin(); i != _theClusters->end(); ++i) |
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| 166 | { |
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| 167 | _MeanEntropy += (*i)->CalcEntropy(T,FreeVol); |
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| 168 | } |
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| 169 | |
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| 170 | // Excitation energy per nucleon |
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| 171 | G4double FragsExcitEnergy = AverageEnergy - _FreeInternalE0; |
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| 172 | |
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| 173 | return FragsExcitEnergy; |
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| 174 | |
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| 175 | } |
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| 176 | |
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| 177 | |
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| 178 | void G4StatMFMacroTemperature::CalcChemicalPotentialNu(const G4double T) |
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| 179 | // Calculates the chemical potential \nu |
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| 180 | |
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| 181 | { |
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| 182 | G4StatMFMacroChemicalPotential * theChemPot = new |
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| 183 | G4StatMFMacroChemicalPotential(theA,theZ,_Kappa,T,_theClusters); |
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| 184 | |
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| 185 | |
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| 186 | _ChemPotentialNu = theChemPot->CalcChemicalPotentialNu(); |
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| 187 | _ChemPotentialMu = theChemPot->GetChemicalPotentialMu(); |
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| 188 | _MeanMultiplicity = theChemPot->GetMeanMultiplicity(); |
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| 189 | |
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| 190 | delete theChemPot; |
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| 191 | |
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| 192 | return; |
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| 193 | |
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| 194 | } |
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| 195 | |
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| 196 | |
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