Structure studies of 257Db through combined {\alpha}, {\gamma} and internal-conversion-electron spectroscopy
Nuclear Experiment
2025-07-03 v1
Abstract
This work reports on the study of the decay properties along the Db decay chain using the GABRIELA setup. The first observation of a high-K isomer in Db is presented. In addition, an unreported -decay branch in Md has been evidenced, allowing to constrain the differences in energy of the -decaying levels in Md, Lr and Db. Finally, the combination of the observed fine structure -decay from the high-spin state in Db with the first observation the internal decay in 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 Db is suggested, and the implications of such a change are also discussed.
Keywords
Cite
@article{arxiv.2507.01262,
title = {Structure studies of 257Db through combined {\alpha}, {\gamma} and internal-conversion-electron spectroscopy},
author = {P. Brionnet and A. Lopez-Martens and O. Dorvaux and Z. Asfari and M. L. Chelnokov and V. I. Chepigin and H. Faure and B. Gall and K. Hauschild and A. V. Isaev and I. N. Izosimov and A. A. Kuznetsova and O. N. Malyshev and R. S Mukhin and J. Piot and A. G. Popeko and Y. A. Popov and K. Rezynkina and B. Sailaubekov and E. A. Sokol and A. I. Svirikhin and M. S. Tezekbayeva and A. V. Yeremin and N. I. Zamyatin},
journal= {arXiv preprint arXiv:2507.01262},
year = {2025}
}
Comments
accepted for publication in PRC in June 2025