[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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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: G4StatMFMacroChemicalPotential.cc,v 1.6 2008/07/25 11:20:47 vnivanch Exp $ |
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[1340] | 28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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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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| 32 | |
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| 33 | |
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| 34 | #include "G4StatMFMacroChemicalPotential.hh" |
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| 35 | |
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| 36 | // operators definitions |
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| 37 | G4StatMFMacroChemicalPotential & |
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| 38 | G4StatMFMacroChemicalPotential::operator=(const G4StatMFMacroChemicalPotential & ) |
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| 39 | { |
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| 40 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroChemicalPotential::operator= meant to not be accessable"); |
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| 41 | return *this; |
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| 42 | } |
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| 43 | |
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| 44 | G4bool G4StatMFMacroChemicalPotential::operator==(const G4StatMFMacroChemicalPotential & ) const |
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| 45 | { |
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| 46 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroChemicalPotential::operator== meant to not be accessable"); |
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| 47 | return false; |
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| 48 | } |
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| 49 | |
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| 50 | |
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| 51 | G4bool G4StatMFMacroChemicalPotential::operator!=(const G4StatMFMacroChemicalPotential & ) const |
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| 52 | { |
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| 53 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroChemicalPotential::operator!= meant to not be accessable"); |
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| 54 | return true; |
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| 55 | } |
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| 56 | |
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| 57 | |
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| 58 | |
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| 59 | |
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| 60 | G4double G4StatMFMacroChemicalPotential::CalcChemicalPotentialNu(void) |
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| 61 | // Calculate Chemical potential \nu |
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| 62 | { |
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| 63 | G4double CP = ((3./5.)*elm_coupling/G4StatMFParameters::Getr0())* |
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| 64 | (1.0-1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1.0/3.0)); |
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| 65 | |
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| 66 | // Initial value for _ChemPotentialNu |
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| 67 | _ChemPotentialNu = (theZ/theA)*(8.0*G4StatMFParameters::GetGamma0()+2.0*CP*std::pow(theA,2./3.)) - |
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| 68 | 4.0*G4StatMFParameters::GetGamma0(); |
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| 69 | |
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| 70 | |
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| 71 | G4double ChemPa = _ChemPotentialNu; |
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| 72 | G4double ChemPb = 0.5*_ChemPotentialNu; |
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| 73 | |
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| 74 | G4double fChemPa = this->operator()(ChemPa); |
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| 75 | G4double fChemPb = this->operator()(ChemPb); |
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| 76 | |
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| 77 | if (fChemPa*fChemPb > 0.0) { |
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| 78 | // bracketing the solution |
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| 79 | if (fChemPa < 0.0) { |
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| 80 | do { |
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| 81 | ChemPb -= 1.5*std::abs(ChemPb-ChemPa); |
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| 82 | fChemPb = this->operator()(ChemPb); |
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| 83 | } while (fChemPb < 0.0); |
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| 84 | } else { |
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| 85 | do { |
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| 86 | ChemPb += 1.5*std::abs(ChemPb-ChemPa); |
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| 87 | fChemPb = this->operator()(ChemPb); |
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| 88 | } while (fChemPb > 0.0); |
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| 89 | } |
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| 90 | } |
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| 91 | |
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| 92 | G4Solver<G4StatMFMacroChemicalPotential> * theSolver = |
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| 93 | new G4Solver<G4StatMFMacroChemicalPotential>(100,1.e-4); |
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| 94 | theSolver->SetIntervalLimits(ChemPa,ChemPb); |
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| 95 | // if (!theSolver->Crenshaw(*this)) |
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[962] | 96 | if (!theSolver->Brent(*this)){ |
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| 97 | G4cerr <<"G4StatMFMacroChemicalPotential:"<<" ChemPa="<<ChemPa<<" ChemPb="<<ChemPb<< G4endl; |
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| 98 | G4cerr <<"G4StatMFMacroChemicalPotential:"<<" fChemPa="<<fChemPa<<" fChemPb="<<fChemPb<< G4endl; |
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[819] | 99 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroChemicalPotential::CalcChemicalPotentialNu: I couldn't find the root."); |
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[962] | 100 | } |
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[819] | 101 | _ChemPotentialNu = theSolver->GetRoot(); |
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| 102 | delete theSolver; |
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| 103 | return _ChemPotentialNu; |
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| 104 | } |
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| 105 | |
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| 106 | |
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| 107 | |
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| 108 | G4double G4StatMFMacroChemicalPotential::CalcMeanZ(const G4double nu) |
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| 109 | { |
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| 110 | std::vector<G4VStatMFMacroCluster*>::iterator i; |
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| 111 | for (i= _theClusters->begin()+1; i != _theClusters->end(); ++i) |
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| 112 | { |
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| 113 | (*i)->CalcZARatio(nu); |
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| 114 | } |
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| 115 | CalcChemicalPotentialMu(nu); |
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| 116 | // This is important, the Z over A ratio for proton and neutron depends on the |
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| 117 | // chemical potential Mu, while for the first guess for Chemical potential mu |
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| 118 | // some values of Z over A ratio. This is the reason for that. |
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| 119 | (*_theClusters->begin())->CalcZARatio(nu); |
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| 120 | |
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| 121 | G4double MeanZ = 0.0; |
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| 122 | G4int n = 1; |
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| 123 | for (i = _theClusters->begin(); i != _theClusters->end(); ++i) |
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| 124 | { |
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| 125 | MeanZ += static_cast<G4double>(n++) * |
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| 126 | (*i)->GetZARatio() * |
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| 127 | (*i)->GetMeanMultiplicity(); |
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| 128 | } |
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| 129 | return MeanZ; |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | void G4StatMFMacroChemicalPotential::CalcChemicalPotentialMu(const G4double nu) |
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| 134 | // Calculate Chemical potential \mu |
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| 135 | // For that is necesary to calculate mean multiplicities |
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| 136 | { |
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| 137 | G4StatMFMacroMultiplicity * theMultip = new |
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| 138 | G4StatMFMacroMultiplicity(theA,_Kappa,_MeanTemperature,nu,_theClusters); |
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| 139 | |
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| 140 | _ChemPotentialMu = theMultip->CalcChemicalPotentialMu(); |
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| 141 | _MeanMultiplicity = theMultip->GetMeanMultiplicity(); |
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| 142 | |
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| 143 | delete theMultip; |
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| 144 | |
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| 145 | return; |
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| 146 | |
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| 147 | } |
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