NUCLEAR-CHARGE RADII AND ELECTRIC QUADRUPOLE-MOMENTS OF EVEN-EVEN ISOTOPES

Isotope shifts of the charge mean-square radii and electric quadrupole moments of even-even nuclei with 20 less than or equal to Z less than or equal to 98 are calculated using a dynamical microscopic model. A single-particle Nilsson potential with the Seo set of correction terms , pairing forces in the BCS formalism, and a long-range interaction in the local approximation are used. A collective Hamiltonian is obtaine d using a generator coordinate method with the Gaussian overlap approx imation. The potential energy of the nucleus consists of a microscopic -macroscopic Strutinsky energy and a zero-point vibrational term. A li quid droplet model is used for the macroscopic part of the potential. A BCS wave function is taken as a generator function, and two collecti ve variables, quadrupole and hexadecapole deformations, serve as the g enerator coordinates. In general, good agreement between the theory an d experimental data is achieved. (C) 1995 Academic Press, Inc.