RELATIVISTIC MEAN-FIELD DESCRIPTION OF LIGHT LAMBDA-HYPERNUCLEI WITH LARGE NEUTRON EXCESS

The relativistic Hartree-Bogoliubov model in coordinate space, with a finite range pairing interaction, is applied to the description of ii hypernuclei with a large neutron excess. The addition of the Lambda hy peron to Ne isotopes with neutron halo can shift the neutron drip by s tabilizing an otherwise unbound core nucleus. The additional binding o f the halo neutrons to the core originates from the increase in magnit ude of the spin-orbit term. Although the Lambda produces only a fracti onal change in the central mean-field potential, through a purely rela tivistic effect it increases the spin-orbit term which binds the outer most neutrons.