Spectroscopy along flerovium decay chains. II. Fine structure in odd-A (289)Fl



Cox, DM, Samark-Roth, A, Rudolph, D, Sarmiento, LG, Clark, RM, Egido, JL, Golubev, P, Heery, J, Yakushev, A, Aberg, S
et al (show 44 more authors) (2023) Spectroscopy along flerovium decay chains. II. Fine structure in odd-A (289)Fl. PHYSICAL REVIEW C, 107 (2).

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Abstract

Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus Fl289 were observed following the fusion-evaporation reaction Ca48+Pu244. The results call for at least two parallel α-decay sequences starting from at least two different states of Fl289. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α-decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between Cn285 and Ds281. Our experimental results, on the excited level structure of the heaviest odd-N nuclei to date, provide a direct testing ground for theory. This is illustrated by comparison with new nuclear structure calculations based on the symmetry-conserving configuration mixing theory.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 13 Nov 2023 08:54
Last Modified: 13 Nov 2023 08:54
DOI: 10.1103/PhysRevC.107.L021301
Open Access URL: https://journals.aps.org/prc/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3176760