Abstract
The -decay properties of the very neutron-rich nucleus were studied at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. Several new -transitions and levels were added to its decay scheme and the order of the two lowest-lying levels in the daughter was corrected. For the first time radiation following -delayed neutron emission was observed. The shell-model calculations and apparent transition intensities were used to guide the spin assignment to the levels, in particular for the low-energy part of the level scheme. The new spin-parity proposed for the ground state of is supported also by the systematics of isotones.
- Received 7 April 2016
DOI:https://doi.org/10.1103/PhysRevC.93.064324
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