Abstract
We have employed the relativistic mean field (RMF)+BCS approach, to study ground state properties of drip line isotopes of Si. In this approach the single particle continuum corresponding to the RMF is replaced by a set of discrete positive energy states for the calculations of pairing energy. Detailed analysis of separation energy, single particle spectrum, pairing energies, and densities of the nuclei predict weakly bound structure in neutron-rich Si isotopes, which is seen to be due to the large spatial extension of the wave functions for the weakly bound single particle states with low orbital angular momentum having very small centrifugal barriers.
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