If one googles "island of inversion" there are about a thousand results almost all of which refer to a group of neutron-rich nuclei in a region of the nuclear chart centered around 31Na (11 protons and 20 neutrons), a term introduced by Warburton, Becker and Brown.

Oxygen, with eight protons, is the heaviest isotope for which the neutron drip line has been experimentally established; it occurs at 24O which has 16 neutrons.

Open and marginally stable quantum systems are of great current interest in relation to numerous applications in nuclear physics of exotic nuclei, chemical reactions, condensed matter, astrophysics, and quantum informatics. The general problem can be formulated as that of the signal transmission through a complicated quantum system.

Recent advances published in http://link.aps.org/doi/10.1103/PhysRevLett.107.032501 represent an important step forward in understanding the role of correlations in very neutron rich nuclei, particularly in terms of the underlying nuclear forces.

In nuclear structure theory the two main computational methods for heavy nuclei based upon the nucleon fermionic degrees of freedom are the Hartree-Fock or energy-density-functional (EDF) method and the configuration interaction (CI) method.