2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192287We calculate positions of one- and two-particle, proton and neutron drip lines within the Hartree-Fock-Bogoliubov theory using Skyrme interaction. We also determine an approximate $r$-process path defined as a line where the neutron binding energy is equal to 2~MeV. A weakening of the nuclear shell structure at drip lines is found and interpreted as resulting from a coupling with continuum states.10 pages REVTEX 3.0, 3 uuencoded postscript figures included, IFT/14/93Nuclear Theorytext