Light exotic nuclei with extreme neutron excess and $2\le z\le 8$

Abstract

Using HF+BCS method we study light nuclei with nuclear charge in the range $2\le Z\le 8$ and lying near the neutron drip line. The HF method uses effective Skyrme forces and allows for axial deformations. We find that the neutron drip line forms stability peninsulas at ${}^{18}$He and ${}^{40}$C. These isotopes are found to be stable against one neutron emission and possess the highest known neutron to proton ratio in stable nuclei.