$\alpha$ decay of high- K isomers in ${}^{270}\mathrm{Ds}$ and ${}^{266}\mathrm{Hs}$ in a superfluid tunneling model

Journal Article · 01 February 2018 · Physical Review C

DOI: https://doi.org/10.1103/PhysRevC.97.024333 · OSTI ID:1430686

Clark, R. M. ^[1]; Rudolph, D. ^[2]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
2. Lund Univ. (Sweden). Dept. of Physics

Here, we use the superfluid tunneling model (STM) to calculate the half-lives of ground-state α decays of even-even superheavy nuclei (SHN) with Z ≥ 100 . The experimental data are reproduced to accuracies comparable to other contemporary models of α decay of SHN. We apply the STM to the case of the α decaying high-K isomers identified in the decay chains of ²⁷⁰Ds . By accounting for the α -decay Q values, Q_α, the angular momentum difference between initial and final states, L, and a reduction in the pairing gap, Δ, we are able to reproduce the observed α decay of the isomers, including the unusual competition between L ≈ 10 and L ≈ 0 α branches seen for the K isomer in ²⁷⁰Ds ( Z = 110 ).

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP); Knut and Alice Wallenberg Foundation (KAW)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1430686
• Alternate ID(s): OSTI ID: 1422641
• Journal Information: Physical Review C, Vol. 97, Issue 2; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English