  Encouraged by the success of RMF+BCS approach for the description of the
ground state properties of the chains of isotopes of proton magic nuclei with
proton number \textit{Z}=8, 20, 28, 50 and 82 as well as those of proton
sub-magic nuclei with \textit{Z}=40, we have further employed it, in an
analogous manner, for a detailed calculations of the ground state properties of
the neutron magic isotones with neutron number \textit{N} = 8, 20, 28, 50, 82
and 126 as well as those of neutron sub-magic isotones with \textit{N} = 40
using the TMA force parameterizations in order to explore low lying resonance
and other exotic phenomenon near drip-lines. The results of these calculations
for wave-function, single particle pairing gaps etc. are presented here to
demonstrate the general validity of our RMF+BCS approach. It is found that, in
some of the proton-rich nuclei in the vicinity of the proton drip-line, the
main contribution to the pairing correlations is provided by the low-lying
resonant states, in addition to the contributions coming from the states close
to the Fermi surface, which results extended proton drip-line for isotonic
chain.
