https://doi.org/10.1140/epjd/s10053-025-00992-1
Regular Article - Atomic Physics
Effects of the strong Breit interaction on the 2s2p–1s2s transitions of inner-shell hole states of helium-like ions
1
Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, 730070, Lanzhou, People’s Republic of China
2
Gansu International Scientific and Technological Cooperation Base of Laser plasma Spectroscopy, 730070, Lanzhou, People’s Republic of China
3
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, People’s Republic of China
Received:
15
November
2024
Accepted:
29
March
2025
Published online:
2
May
2025
We have calculated the transition energies and probabilities of one-electron one-photon and two-electron one-photon transitions of middle-Z and high-Z He-like ions using the fully relativistic multi-configuration Dirac–Hartree–Fock method with active space method. The relativistic, electron correlation, Breit interaction and QED effects are systemically taken into account in the present work. The results demonstrate consistent agreement with both experimental and theoretical data, revealing notable inversion phenomena in the energy of one-electron one-photon transitions, particularly in double-hole states. Theoretical spectra intensities provide valuable insights into high-energy X-ray radiative processes from double-K-hole states.
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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.
