https://doi.org/10.1140/epjd/s10053-025-00961-8
Regular Article - Atomic and Molecular Collisions
Dielectronic and tri-electronic recombination strengths of low-lying resonances and plasma rate coefficients for beryllium-like argon ions
1
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
2
University of Chinese Academy of Sciences, 100049, Beijing, China
3
Helmholtz-Institut Jena, 07743, Jena, Germany
4
GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
5
Indian Institute of Technology Mandi, 175075, Mandi, India
6
Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, China
7
Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743, Jena, Germany
Received:
1
November
2024
Accepted:
17
January
2025
Published online:
5
March
2025
Experimental dielectronic recombination spectra of highly charged ions, measured at the storage ring using the electron-ion merged-beam technique, are known for their high resolutions at low collision energies. This resolutions is quite in contrast to the present computations of the low-lying resonances and plasma rate coefficients, which are still a challenge for modern atomic theory. In this study, we investigate the dielectronic and tri-electronic recombination strengths of low-lying resonances for beryllium-like argon ions in the low energy range (0–5 eV) by using the newly developed Jena Atomic Calculator (JAC). JAC is a relativistic computational code based on the multi-configuration Dirac–Hartree–Fock (MCDHF) method. Our calculated strengths are compared with both experimental data and recent theoretical calculations by Zhang et al. (Phys Rev A 108:022801, 2023), showing good agreement within experimental uncertainties. Furthermore, in combination with a dielectronic cascade model, we derive the plasma rate coefficients for the 
transition over a wide temperature range from 
K to 
K. These rapidly derived, reliable plasma rate coefficients have potential applications in astrophysics and plasma physics.
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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.
