RELATIVISTIC MEAN-FIELD STUDY OF MG ISOTOPES

The nonlinear relativistic mean-held theory is used to investigate the ground state properties of Mg isotopes from the proton-drip-line nucl eus Mg-20 to the neutron-drip-line nucleus Mg-40, covering three magic numbers N = 8, 20, and 28. Special emphasis is placed on the influenc e of the pairing correlation on the deformation. Calculations show tha t the relativistic mean-field theory provides a good description of th e binding energy and the root-mean-square radius of charge distributio ns. A monotonic increase of the neutron skin thickness with neutron ex cess is predicted. The nuclear shell structure at magic numbers N = 8, 20, and 28 is discussed.