Beyond the neutron-drip line: two-neutron decay of unbound nuclei

Abstract

We discuss a decay of unbound nuclei beyond the neutron drip-line using a three-body model with a core nucleus and two valence neutrons. We particularly discuss the role of dineutron correlation between the valence neutrons in the two-neutron emission from the ground state of ${}^{26}$O and ${}^{10}$He nuclei. Our calculations clearly indicate that the emission of the two neutrons in the back-to-back direction is enhanced due to the dineutron correlation.

Comments: 8 pages, 5 figures. A talk given at the Ito International Research Center Symposium "Perspectives of the Physics of Nuclear Structure", Nov. 1-4, 2017, Tokyo, Japan