G4NuclearShellModelDensity.cc

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#include "G4NuclearShellModelDensity.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4Exp.hh"
#include "G4Log.hh"
#include "G4Pow.hh"

G4NuclearShellModelDensity::G4NuclearShellModelDensity(G4int anA, G4int /*aZ*/) 
: theA(anA)//, theZ(aZ)
{
        const G4double r0sq=0.8133*fermi*fermi;
        theRsquare= r0sq * G4Pow::GetInstance()->Z23(theA);
        G4double x = 1./(pi*theRsquare);
        Setrho0(x*std::sqrt(x));
}

G4NuclearShellModelDensity::~G4NuclearShellModelDensity() {}
    
G4double G4NuclearShellModelDensity::GetRelativeDensity(const G4ThreeVector & aPosition) const
{
        return G4Exp(-1*aPosition.mag2()/theRsquare);
}
    
G4double G4NuclearShellModelDensity::GetRadius(const G4double maxRelativeDensity) const
{

     return (maxRelativeDensity>0 && maxRelativeDensity <= 1 ) ?
             std::sqrt(theRsquare * G4Log(1/maxRelativeDensity) ) : DBL_MAX;
}
   
G4double   G4NuclearShellModelDensity::GetDeriv(const G4ThreeVector & aPosition) const
{
     return -2* aPosition.mag() / theRsquare * GetDensity(aPosition);
}