Abstract
A -decaying isomeric state ( ns) has been identified in , which is one particle away from the last known bound nucleus, . Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar () and isovector () neutron-proton pairs. The data also suggest evidence for the population of a state, which is predicted by shell-model calculations to be yrast. Such a low-lying state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of and neutron-proton pairs.
- Received 27 November 2017
- Revised 3 August 2018
DOI:https://doi.org/10.1103/PhysRevC.99.021302
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