Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Poster – Highly Charged Ions and their Applications
A 15.4: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
Interplay of Hyperfine Mixing and Nuclear-Atomic Interactions in Highly Charged Ions — •Kaiqiang Shi1,2,3, Xinwen Ma1,2, and Adriana Pálffy3 — 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China — 2School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, China — 3Institute of Theoretical Physics and Astrophysics, University of Würzburg, Würzburg, Germany
As nuclear-scale effects become increasingly relevant in atomic physics, it is crucial to understand how atomic and nuclear degrees of freedom couple in ions. Nuclear hyperfine mixing (NHM) [1] is central to this problem. Beyond its role in 229Th, recent theory [2] suggests that boronlike 205Pb ions, with a 2.329 keV nuclear transition, may show strongly enhanced NHM-driven decay, greatly shortening the isomer’s radiative lifetime. This indicates that systems other than 229Th could also serve as platforms for studying nuclear-atomic coupling.
Bound internal conversion (BIC), the inverse of NEET [3], offers another channel linking nuclear excitation to the electronic shell. Although NHM and BIC are subject to different requirements—magnetic coupling versus energy matching—some heavy nuclei with low-lying transitions may naturally meet both. We investigate such cases, in which the interplay between NHM and BIC becomes significant and must be considered when analyzing nuclear decay in complex ionic environments. 89
[1] V. M. Shabaev et al., Phys. Rev. Lett. 128, 043001 (2022).
[2] W. Wang and X. Wang, Phys. Rev. Lett. 133, 032501 (2024).
[3] S. K. Arigapudi and A. Pálffy, Phys. Rev. A 85, 012710 (2012).
Keywords: nuclear hyperfine mixing (NHM); bound internal conversion (BIC); highly charged ion (HCI)