A1 Journal article (refereed)
Spectroscopy along flerovium decay chains. II : Fine structure in odd-A289Fl (2023)

Cox, D. M., Såmark-Roth, A., Rudolph, D., Sarmiento, L. G., Clark, R. M., Egido, J. L., Golubev, P., Heery, J., Yakushev, A., Åberg, S., Albers, H. M., Albertsson, M., Block, M., Brand, H., Calverley, T., Cantemir, R., Carlsson, B. G., Düllmann, C. E., Eberth, J., . . . Uusitalo, J. (2023). Spectroscopy along flerovium decay chains. II : Fine structure in odd-A289Fl. Physical Review C, 107(2), Article L021301. https://doi.org/10.1103/PhysRevC.107.L021301

JYU authors or editors

Publication details

All authors or editors: Cox, D. M.; Såmark-Roth, A.; Rudolph, D.; Sarmiento, L. G.; Clark, R. M.; Egido, J. L.; Golubev, P.; Heery, J.; Yakushev, A.; Åberg, S.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2023

Publication date: 06/02/2023

Volume: 107

Issue number: 2

Article number: L021301

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevC.107.L021301

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/86309

Publication is parallel published: https://portal.research.lu.se/en/publications/spectroscopy-along-flerovium-decay-chains-ii-fine-structure-in-od

Abstract

Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus 289Fl were observed following the fusion-evaporation reaction 48Ca+244Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of 289Fl. 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 285Cn and 281Ds. 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.

Keywords: nuclear physics

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Ministry reporting: Yes

VIRTA submission year: 2023

JUFO rating: 2