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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.01262 |
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| _version_ | 1866908430072020992 |
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| author | Brionnet, P. Lopez-Martens, A. Dorvaux, O. Asfari, Z. Chelnokov, M. L. Chepigin, V. I. Faure, H. Gall, B. Hauschild, K. Isaev, A. V. Izosimov, I. N. Kuznetsova, A. A. Malyshev, O. N. Mukhin, R. S Piot, J. Popeko, A. G. Popov, Y. A. Rezynkina, K. Sailaubekov, B. Sokol, E. A. Svirikhin, A. I. Tezekbayeva, M. S. Yeremin, A. V. Zamyatin, N. I. |
| author_facet | Brionnet, P. Lopez-Martens, A. Dorvaux, O. Asfari, Z. Chelnokov, M. L. Chepigin, V. I. Faure, H. Gall, B. Hauschild, K. Isaev, A. V. Izosimov, I. N. Kuznetsova, A. A. Malyshev, O. N. Mukhin, R. S Piot, J. Popeko, A. G. Popov, Y. A. Rezynkina, K. Sailaubekov, B. Sokol, E. A. Svirikhin, A. I. Tezekbayeva, M. S. Yeremin, A. V. Zamyatin, N. I. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01262 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Structure studies of 257Db through combined α, γ and internal-conversion-electron spectroscopy Brionnet, P. Lopez-Martens, A. Dorvaux, O. Asfari, Z. Chelnokov, M. L. Chepigin, V. I. Faure, H. Gall, B. Hauschild, K. Isaev, A. V. Izosimov, I. N. Kuznetsova, A. A. Malyshev, O. N. Mukhin, R. S Piot, J. Popeko, A. G. Popov, Y. A. Rezynkina, K. Sailaubekov, B. Sokol, E. A. Svirikhin, A. I. Tezekbayeva, M. S. Yeremin, A. V. Zamyatin, N. I. Nuclear Experiment 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. |
| title | Structure studies of 257Db through combined α, γ and internal-conversion-electron spectroscopy |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2507.01262 |