The selfconsistent Hartree--Fock calculation with the Gogny effective interaction D1S was performed for the spherical nuclei Ca, Sr, Sn, Sm. The shell effects were extracted by Strutinsky procedure and then the macroscopic energy evaluated by the liquid drop formula. Its parameters and isospin dependent formulae for radii were found.
PACS numbers: 21.24.Dr, 21.30.Fe, 21.60.Jz
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