G4StatMFMacroTriNucleon.cc

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//
// $Id$
//
// Hadronic Process: Nuclear De-excitations
// by V. Lara

#include "G4StatMFMacroTriNucleon.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

// Operators

G4StatMFMacroTriNucleon & G4StatMFMacroTriNucleon::
operator=(const G4StatMFMacroTriNucleon & )
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTriNucleon::operator= meant to not be accessable");
    return *this;
}


G4bool G4StatMFMacroTriNucleon::operator==(const G4StatMFMacroTriNucleon & ) const
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTriNucleon::operator== meant to not be accessable");
    return false;
}
 

G4bool G4StatMFMacroTriNucleon::operator!=(const G4StatMFMacroTriNucleon & ) const
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTriNucleon::operator!= meant to not be accessable");
    return true;
}



G4double G4StatMFMacroTriNucleon::CalcMeanMultiplicity(const G4double FreeVol, const G4double mu, 
                                                       const G4double nu, const G4double T)
{
    const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
        
    const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;
        
    const G4double degeneracy = 2.0+2.0;  // H3 + He3
        
    const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
        (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));

    const G4double BindingE = G4NucleiProperties::GetBindingEnergy(theA,1); // old value was 9.224*MeV
//                                                      + G4NucleiProperties::GetBindingEnergy(theA,2);

    G4double exponent = (BindingE+ theA*(mu+nu*theZARatio) - 
                         Coulomb*theZARatio*theZARatio*std::pow(static_cast<G4double>(theA),5./3.))/T;
    if (exponent > 700.0) exponent = 700.0;

    _MeanMultiplicity = (degeneracy*FreeVol*static_cast<G4double>(theA)*
                         std::sqrt(static_cast<G4double>(theA))/lambda3)*
        std::exp(exponent);
                         
    return _MeanMultiplicity;
}


G4double G4StatMFMacroTriNucleon::CalcEnergy(const G4double T)
{
    const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())*
        (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.));
                                                                        
    return _Energy  = -G4NucleiProperties::GetBindingEnergy(theA,1) + 
        Coulomb * theZARatio * theZARatio * std::pow(static_cast<G4double>(theA),5./3.) +
        (3./2.) * T;
                                                        
}


G4double G4StatMFMacroTriNucleon::CalcEntropy(const G4double T, const G4double FreeVol)
{
    const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T);
    const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght;

    G4double Entropy = 0.0;
    if (_MeanMultiplicity > 0.0)
        Entropy = _MeanMultiplicity*(5./2.+
                                     std::log(4.0*static_cast<G4double>(theA)*
                                         std::sqrt(static_cast<G4double>(theA))*FreeVol/(lambda3*_MeanMultiplicity)));
                                                                
                                                                
    return Entropy;
}

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