Structure studies of 257Db through combined α, γ and internal-conversion-electron spectroscopy
Structure studies of 257Db through combined α, γ and internal-conversion-electron spectroscopy
This work reports on the study of the decay properties along the $^{257}$Db decay chain using the GABRIELA setup. The first observation of a high-K isomer in $^{257}$Db is presented. In addition, an unreported $α$-decay branch in $^{249}$Md has been evidenced, allowing to constrain the differences in energy of the $α$-decaying levels in $^{249}$Md, $^{253}$Lr and $^{257}$Db. Finally, the combination of the observed fine structure $α$-decay from the high-spin state in $^{257}$Db with the first observation the internal decay in $^{253}$Lr requires a revision of level and decay scheme. In particular, a change of parity for the high-spin state from 9/2$^{+}$ to 9/2$^{-}$ in the $^{257}$Db is suggested, and the implications of such a change are also discussed.
P. Brionnet、A. Lopez-Martens、O. Dorvaux、Z. Asfari、M. L. Chelnokov、V. I. Chepigin、H. Faure、B. Gall、K. Hauschild、A. V. Isaev、I. N. Izosimov、A. A. Kuznetsova、O. N. Malyshev、R. S Mukhin、J. Piot、A. G. Popeko、Y. A. Popov、K. Rezynkina、B. Sailaubekov、E. A. Sokol、A. I. Svirikhin、M. S. Tezekbayeva、A. V. Yeremin、N. I. Zamyatin
原子能技术基础理论
P. Brionnet,A. Lopez-Martens,O. Dorvaux,Z. Asfari,M. L. Chelnokov,V. I. Chepigin,H. Faure,B. Gall,K. Hauschild,A. V. Isaev,I. N. Izosimov,A. A. Kuznetsova,O. N. Malyshev,R. S Mukhin,J. Piot,A. G. Popeko,Y. A. Popov,K. Rezynkina,B. Sailaubekov,E. A. Sokol,A. I. Svirikhin,M. S. Tezekbayeva,A. V. Yeremin,N. I. Zamyatin.Structure studies of 257Db through combined α, γ and internal-conversion-electron spectroscopy[EB/OL].(2025-07-02)[2025-07-16].https://arxiv.org/abs/2507.01262.点此复制
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