Collapse of the $N=28$ shell closure in the newly discovered ${}^{39}$Na and the development of deformed halos towards the neutron dripline

K. Y. Zhang, P. Papakonstantinou, M. -H. Mun +3

Halos and changes of nuclear magicities have been extensively investigated in exotic nuclei during past decades. The newly discovered ${}^{39}$Na with the neutron number $N=28$ provi…