MEAN FIELD POTENTIAL ?? =POTENTIAL ENERGY THAT IS DERIVED FROM THE SUMMATION OF COULOMB POTENTIAL AND CENTRAL POTENTIAL OR SHIELDING POTENTIAL.

V(r) = VCOULOMB + VSCREENING

VCOULOMB =

For VSCREENING :

if

= if

c being the parameter for the screening effect caused by clouds of electrons at the shells of the atom.

For Lithium, c = 0.56e-10

For Sodium, c = 0.55e-10

For Potassium, c = 0.66e-10

For Rubidium, c = 0.58e-10

For Cesium, c = 0.60e-10