176 lines
6.5 KiB
C++
176 lines
6.5 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4StatMFMacroMultiNucleon.cc,v 1.7 2008/11/19 14:33:31 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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//
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// Hadronic Process: Nuclear De-excitations
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// by V. Lara
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//
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// Modified:
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// 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor
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// Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute,
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// Moscow, pshenich@fias.uni-frankfurt.de) fixed computation of the
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// symmetry energy
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#include "G4StatMFMacroMultiNucleon.hh"
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// Default constructor
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G4StatMFMacroMultiNucleon::
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G4StatMFMacroMultiNucleon() :
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G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::default_constructor meant to not be accessable");
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}
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// Copy constructor
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G4StatMFMacroMultiNucleon::
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G4StatMFMacroMultiNucleon(const G4StatMFMacroMultiNucleon & ) :
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G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::copy_constructor meant to not be accessable");
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}
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// Operators
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G4StatMFMacroMultiNucleon & G4StatMFMacroMultiNucleon::
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operator=(const G4StatMFMacroMultiNucleon & )
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator= meant to not be accessable");
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return *this;
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}
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G4bool G4StatMFMacroMultiNucleon::operator==(const G4StatMFMacroMultiNucleon & ) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator== meant to not be accessable");
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return false;
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}
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G4bool G4StatMFMacroMultiNucleon::operator!=(const G4StatMFMacroMultiNucleon & ) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator!= meant to not be accessable");
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return true;
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}
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G4double G4StatMFMacroMultiNucleon::CalcMeanMultiplicity(const G4double FreeVol, const G4double mu,
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const G4double nu, const G4double T)
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{
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const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
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const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
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const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.);
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const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
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(1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
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G4double exponent = (mu + nu*theZARatio+ G4StatMFParameters::GetE0() + T*T/_InvLevelDensity
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- G4StatMFParameters::GetGamma0()*(1.0 - 2.0*theZARatio)*
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(1.0 - 2.0*theZARatio))*theA
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- G4StatMFParameters::Beta(T)*A23 - Coulomb*theZARatio*theZARatio*A23*theA;
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exponent /= T;
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if (exponent > 30.0) exponent = 30.0;
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_MeanMultiplicity = std::max((FreeVol * static_cast<G4double>(theA) *
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std::sqrt(static_cast<G4double>(theA))/lambda3) *
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std::exp(exponent),1.0e-30);
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return _MeanMultiplicity;
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}
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G4double G4StatMFMacroMultiNucleon::CalcZARatio(const G4double nu)
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{
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const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
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(1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
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G4double den = 8.0*G4StatMFParameters::GetGamma0()+2.0*Coulomb*std::pow(static_cast<G4double>(theA),2./3.);
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G4double num = 4.0*G4StatMFParameters::GetGamma0()+nu;
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return theZARatio = num/den;
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}
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G4double G4StatMFMacroMultiNucleon::CalcEnergy(const G4double T)
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{
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const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
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(1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
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const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.);
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// Volume term
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G4double EVol = static_cast<G4double>(theA) * (T*T/_InvLevelDensity - G4StatMFParameters::GetE0());
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// Symmetry term
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G4double ESym = static_cast<G4double>(theA) * G4StatMFParameters::GetGamma0() *(1. - 2.* theZARatio) * (1. - 2.* theZARatio);
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// Surface term
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G4double ESurf = A23*(G4StatMFParameters::Beta(T) - T*G4StatMFParameters::DBetaDT(T));
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// Coulomb term
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G4double ECoul = Coulomb*A23*static_cast<G4double>(theA)*theZARatio*theZARatio;
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// Translational term
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G4double ETrans = (3./2.)*T;
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return _Energy = EVol + ESurf + ECoul + ETrans + ESym;
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}
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G4double G4StatMFMacroMultiNucleon::CalcEntropy(const G4double T, const G4double FreeVol)
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{
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const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
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const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
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G4double Entropy = 0.0;
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if (_MeanMultiplicity > 0.0) {
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// Volume term
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G4double SV = 2.0*static_cast<G4double>(theA)*T/_InvLevelDensity;
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// Surface term
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G4double SS = -G4StatMFParameters::DBetaDT(T)*std::pow(static_cast<G4double>(theA),2./3.);
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// Translational term
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G4double ST = (5./2.)+std::log(FreeVol * std::sqrt(static_cast<G4double>(theA)) *
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static_cast<G4double>(theA)/(lambda3*_MeanMultiplicity));
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Entropy = _MeanMultiplicity*(SV + SS + ST);
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}
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return Entropy;
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}
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