Abstract
Bandhead energies of all the physically admissible low-lying two-quasiparticle configuration states in the doubly-odd heavy actinide are evaluated using the well-tested two-quasiparticle rotor model with explicit inclusion of the residual proton-neutron interaction. A critical examination of these results, aimed at characterization of the long-lived ( min and 28 min; ) isomer pair, conclusively rules out a high-spin () assignment for either of the isomers. Our analysis leads to and assignments, respectively, to these isomers and designates the 10-min isomer as its ground state. Our study reveals a “landmark” position for in the decay path of super heavy elements. The as-yet unobserved electron capture decay branches from each of the two isomers to levels are specified.
- Received 1 October 2016
- Revised 11 January 2017
DOI:https://doi.org/10.1103/PhysRevC.95.024317
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