Gabriele Cosmo
116 lines
4.5 KiB
C++
116 lines
4.5 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: G4StatMFMacroBiNucleon.cc,v 1.5 2006/06/29 20:24:49 gunter Exp $
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// GEANT4 tag $Name: geant4-08-01 $
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//
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// Hadronic Process: Nuclear De-excitations
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// by V. Lara
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#include "G4StatMFMacroBiNucleon.hh"
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// Operators
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G4StatMFMacroBiNucleon & G4StatMFMacroBiNucleon::
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operator=(const G4StatMFMacroBiNucleon & )
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator= meant to not be accessable");
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return *this;
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}
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G4bool G4StatMFMacroBiNucleon::operator==(const G4StatMFMacroBiNucleon & ) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator== meant to not be accessable");
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return false;
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}
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G4bool G4StatMFMacroBiNucleon::operator!=(const G4StatMFMacroBiNucleon & ) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator!= meant to not be accessable");
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return true;
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}
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G4double G4StatMFMacroBiNucleon::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 degeneracy = 3.0;
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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 BindingE = G4NucleiPropertiesTable::GetBindingEnergy(1,theA); //old value was 2.796*MeV
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G4double exponent = (BindingE + theA*(mu+nu*theZARatio) -
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Coulomb*theZARatio*theZARatio*std::pow(G4double(theA),5./3.))/T;
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// To avoid numerical problems
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if (exponent < -700.0) exponent = -700.0;
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else if (exponent > 700.0) exponent = 700.0;
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_MeanMultiplicity = (degeneracy*FreeVol*static_cast<G4double>(theA)*std::sqrt(static_cast<G4double>(theA))/lambda3)*
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std::exp(exponent);
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return _MeanMultiplicity;
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}
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G4double G4StatMFMacroBiNucleon::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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_Energy = -G4NucleiPropertiesTable::GetBindingEnergy(1,theA) +
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Coulomb * theZARatio * theZARatio * std::pow(G4double(theA),5./3.) +
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(3./2.) * T;
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return _Energy;
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}
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G4double G4StatMFMacroBiNucleon::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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// Is this formula correct?
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Entropy = _MeanMultiplicity*(5./2.+
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std::log(3.0*static_cast<G4double>(theA)*
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std::sqrt(static_cast<G4double>(theA))*FreeVol/
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(lambda3*_MeanMultiplicity)));
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return Entropy;
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}
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