New proton and neutron magic numbers in neutron rich nuclei

Abstract

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.