G4StatMFMacroMultiplicity Class Reference

#include <G4StatMFMacroMultiplicity.hh>

Public Member Functions
	G4StatMFMacroMultiplicity (const G4double anA, const G4double kappa, const G4double temp, const G4double nu, std::vector< G4VStatMFMacroCluster * > *ClusterVector)
	~G4StatMFMacroMultiplicity ()
G4double	operator() (const G4double mu)
G4double	GetMeanMultiplicity (void) const
G4double	GetChemicalPotentialMu (void) const
G4double	CalcChemicalPotentialMu (void)

Detailed Description

Definition at line 43 of file G4StatMFMacroMultiplicity.hh.

Constructor & Destructor Documentation

G4StatMFMacroMultiplicity::G4StatMFMacroMultiplicity ( const G4double  anA, const G4double  kappa, const G4double  temp, const G4double  nu, std::vector< G4VStatMFMacroCluster * > *  ClusterVector  )

inline

Definition at line 47 of file G4StatMFMacroMultiplicity.hh.

                                                                     :
    theA(anA),
    _Kappa(kappa),
    _MeanMultiplicity(0.0),
    _MeanTemperature(temp),
    _ChemPotentialMu(0.0),
    _ChemPotentialNu(nu),
    _theClusters(ClusterVector) 
    {};

G4StatMFMacroMultiplicity::~G4StatMFMacroMultiplicity ( )

inline

Definition at line 61 of file G4StatMFMacroMultiplicity.hh.

{};

Member Function Documentation

G4double G4StatMFMacroMultiplicity::CalcChemicalPotentialMu

(

void

)

Definition at line 63 of file G4StatMFMacroMultiplicity.cc.

{
  G4Pow* g4calc = G4Pow::GetInstance();
  G4double CP = G4StatMFParameters::GetCoulomb();

  // starting value for chemical potential \mu
  // it is the derivative of F(T,V)-\nu*Z w.r.t. Af in Af=5
  G4double ZA5 = _theClusters->operator[](4)->GetZARatio();
  G4double ILD5 = _theClusters->operator[](4)->GetInvLevelDensity();
  _ChemPotentialMu = -G4StatMFParameters::GetE0()-
    _MeanTemperature*_MeanTemperature/ILD5 -
    _ChemPotentialNu*ZA5 + 
    G4StatMFParameters::GetGamma0()*(1.0-2.0*ZA5)*(1.0-2.0*ZA5) +
    (2.0/3.0)*G4StatMFParameters::Beta(_MeanTemperature)/g4calc->Z13(5) +
    (5.0/3.0)*CP*ZA5*ZA5*g4calc->Z23(5) -
    1.5*_MeanTemperature/5.0;
        
  G4double ChemPa = _ChemPotentialMu;
  if (ChemPa/_MeanTemperature > 10.0) ChemPa = 10.0*_MeanTemperature;
  G4double ChemPb = ChemPa - 0.5*std::abs(ChemPa);
 
  G4double fChemPa = this->operator()(ChemPa); 
  G4double fChemPb = this->operator()(ChemPb); 
     
  // Set the precision level for locating the root. 
  // If the root is inside this interval, then it's done! 
  const G4double intervalWidth = 1.e-4;

  // bracketing the solution
  G4int iterations = 0;
  // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
  while (fChemPa*fChemPb > 0.0 && iterations < 100) 
    {
      iterations++;
      if (std::abs(fChemPa) <= std::abs(fChemPb)) 
    {
      ChemPa += 0.6*(ChemPa-ChemPb);
      fChemPa = this->operator()(ChemPa);
    } 
      else 
    {
      ChemPb += 0.6*(ChemPb-ChemPa);
      fChemPb = this->operator()(ChemPb);
    }
    }

  if (fChemPa*fChemPb > 0.0) // the bracketing failed, complain 
    {
      G4cout <<"G4StatMFMacroMultiplicity:"<<" ChemPa="<<ChemPa
         <<" ChemPb="<<ChemPb<< G4endl;
      G4cout <<"G4StatMFMacroMultiplicity:"<<" fChemPa="<<fChemPa
         <<" fChemPb="<<fChemPb<< G4endl;
      throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiplicity::CalcChemicalPotentialMu: I couldn't bracket the root.");
    }
  else if (fChemPa*fChemPb < 0.0 && std::abs(ChemPa-ChemPb) > intervalWidth)
    {   
    G4Solver<G4StatMFMacroMultiplicity> * theSolver = 
      new G4Solver<G4StatMFMacroMultiplicity>(100,intervalWidth);
    theSolver->SetIntervalLimits(ChemPa,ChemPb);
    //    if (!theSolver->Crenshaw(*this)) 
    if (!theSolver->Brent(*this)) 
    {
      G4cout <<"G4StatMFMacroMultiplicity:"<<" ChemPa="<<ChemPa
         <<" ChemPb="<<ChemPb<< G4endl;
      throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiplicity::CalcChemicalPotentialMu: I couldn't find the root.");
    }
    _ChemPotentialMu = theSolver->GetRoot();
    delete theSolver;
    }
  else // the root is within the interval, which is shorter then the precision level - all done 
    {
     _ChemPotentialMu = ChemPa;
    }

  return _ChemPotentialMu;
}

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G4double G4StatMFMacroMultiplicity::GetChemicalPotentialMu ( void  ) const

inline

Definition at line 83 of file G4StatMFMacroMultiplicity.hh.

{return _ChemPotentialMu;}

G4double G4StatMFMacroMultiplicity::GetMeanMultiplicity ( void  ) const

inline

Definition at line 81 of file G4StatMFMacroMultiplicity.hh.

{return _MeanMultiplicity;}

G4double G4StatMFMacroMultiplicity::operator() ( const G4double  mu )

inline

Definition at line 63 of file G4StatMFMacroMultiplicity.hh.

    { return (theA - this->CalcMeanA(mu))/theA; }   

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---

The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/processes/hadronic/models/de_excitation/multifragmentation/include/G4StatMFMacroMultiplicity.hh
• geant4.10.03.p01/source/processes/hadronic/models/de_excitation/multifragmentation/src/G4StatMFMacroMultiplicity.cc