NEUTRON SKIN OF NUCLEI NEAR THE NEUTRON DRIP-LINE

Performing Skyrme-type deformed Hartree-Fock calculations, the possibl e presence of neutron skin in nuclei towards neutron drip line is stud ied. The thickness of the neutron skin is found to be nearly constant in all directions if it is measured perpendicular to the surface, and in a given nucleus the number of neutrons being inside of the neutron skin is almost independent of the deformation (namely, spherical shape or normal deformation or superdeformation). In the region of medium-h eavy nuclei our calculation shows the presence of a series of neutron- rich nuclei, in which a neutron skin is present and yet the neutron on e-particle spectra are far from those in a harmonic oscillator (plus s pin-orbit) potential.