Discovery of K -isomeric states in seaborgium isotopes
Open Access
- 16 September 2026
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 114 (3) , 034321
Abstract
The K -isomeric states in the heaviest nuclei are among the interesting topics in superheavy-element research. In the present work, we report on the discovery of µ s isomers in Sg 258 , 259 , 260 which deexcite with half-lives of 120 − 55 + 578 µ s , 85 ± 6 µ s , and 8 . 5 − 1.8 + 3.1 µ s , respectively, and are attributed to high- K states formed in multiquasiparticle couplings. In Sg 261 , activity with 12 . 6 − 1.6 + 2.2 µ s half-life was observed and it is suggested to originate from decays of a high- K multiquasiparticle and/or single-particle isomeric states.Keywords
Funding Information
- Agentúra na Podporu Výskumu a Vývoja (APVV-22-0282)
- Vedecká Grantová Agentúra MŠVVaŠ SR a SAV (1/0019/25)
- GSI Helmholtzzentrum für Schwerionenforschung
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