Prediction of two-neutron halos in the $N=28$ isotones ${}^{40}$Mg and ${}^{39}$Na

Jagjit Singh, J. Casal, W. Horiuchi +2

The ground states of the nuclei ${}^{40}$Mg and ${}^{39}$Na are investigated using the hyperspherical formalism. Since they are located at the edge of the "big island of inversion", we…