Abstract
The low-energy level structure of the exotic Na isotopes has been investigated through β-delayed γ spectroscopy. Detailed level structure of has been obtained through and coincidence measurements. The low-lying levels populated in by β decay were found to corroborate well with the in-beam data from the literature. Half-lives of the parent nuclides, , were measured using β fragment as well as fragment coincidences and compared to previous measurements. The β-delayed one- and two-neutron emission branching probabilities have been obtained from the γ activities of the grand daughter nuclei. A comparison of the level schemes and the β-decay branching ratios is made with shell-model predictions, both with and without intruder configurations, to understand the transition from normal-dominant to intruder-dominant excitations in these neutron-rich nuclei approaching the island of inversion.
7 More- Received 8 December 2005
DOI:https://doi.org/10.1103/PhysRevC.73.054303
©2006 American Physical Society