  It is now known that in neutron rich nuclei, old magic numbers disappear and
new ones appear. Single nucleon and double nucleon separation energies are
plotted here in all possible manner.Using this data it is shown here for the
first time that nuclei with pair of proton number Z and neutron number N (Z,N)
: (6,12), (8,16), (10,20), (11,22) and (12,24) exhibit exceptional stability or
magicity. As such these magic numbers appear in pairs. This correlation is
shown here to be indicative of predominance of tritons in the ground state of
these neutron rich nuclei. Thus ${^{30}_{10} Ne_{20}}$ has the structure of 10
$^{3}_{1} H_{2}$ in the ground state. This confirms the prediction of the
author that triton clustering in neutron rich nuclei as a new phenomenon.
