G4StatMFMacroTetraNucleon.cc

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

#include "G4StatMFMacroTetraNucleon.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

// Copy constructor
G4StatMFMacroTetraNucleon::
G4StatMFMacroTetraNucleon(const G4StatMFMacroTetraNucleon & ) :
    G4VStatMFMacroCluster(0)  // Beacuse the def. constr. of base class is private
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTetraNucleon::copy_constructor meant to not be accessable");
}

// Operators

G4StatMFMacroTetraNucleon & G4StatMFMacroTetraNucleon::
operator=(const G4StatMFMacroTetraNucleon & )
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTetraNucleon::operator= meant to not be accessable");
    return *this;
}


G4bool G4StatMFMacroTetraNucleon::operator==(const G4StatMFMacroTetraNucleon & ) const
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTetraNucleon::operator== meant to not be accessable");
    return false;
}
 

G4bool G4StatMFMacroTetraNucleon::operator!=(const G4StatMFMacroTetraNucleon & ) const
{
    throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroTetraNucleon::operator!= meant to not be accessable");
    return true;
}



G4double G4StatMFMacroTetraNucleon::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 = 1;  // He4
    
    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,2); //old value was 30.11*MeV
    
    G4double exponent = (BindingE + theA*(mu+nu*theZARatio+T*T/_InvLevelDensity) - 
             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 G4StatMFMacroTetraNucleon::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,2) + 
    Coulomb * theZARatio * theZARatio * std::pow(static_cast<G4double>(theA),5./3.) +
    (3./2.) * T +
    theA * T*T/_InvLevelDensity;
                            
}



G4double G4StatMFMacroTetraNucleon::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(8.0*FreeVol/(lambda3*_MeanMultiplicity)))+ // 8 = theA*std::sqrt(theA)
        8.0*T/_InvLevelDensity;         
                                
    return Entropy;
}