https://doi.org/10.1140/epjd/s10053-025-01045-3
Regular Article - Atomic Physics
Theoretical calculations on energy level, transition rates and wavelengths of highly charged Au50+ and Au49+ ions
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, 730070, Lanzhou, China
Received:
6
May
2025
Accepted:
23
July
2025
Published online:
15
August
2025
The energy levels, electric dipole transition rates and wavelengths of Cu-like (Au50+) and Zn-like (Au49+) ions were systematically calculated using the multi-configuration Dirac–Hartree–Fock method. The calculations incorporated electron correlation effects between valence-valence, core-valence, and core-core electrons. It was found that electron correlation significantly impacts the excitation energies of the Au50+ and Au49+ ions. In the calculation, the electron correlation configurations are expanded to n = 8 for the Au50+ ion and n = 7 for the Au49+ ion through single and double substitutions, resulting in good convergence for the excitation energy. Additionally, QED effects, Breit interaction, and the finite-nuclear-size effects to the excited states of Au50+ and Au49+ ions are also considered in the calculation. QED effects and the Breit interaction, in particular, were found to have an important influence for the excitation energy. Moreover, the calculated transition energies are in excellent agreement with experimental data, with a deviation of less than 0.078%. These results are expected to be useful for diagnosing high-temperature gold plasmas, particularly in fusion plasma applications.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
