Precise determination of the 2s22p5-2s2p6 transition energy in fluorine-like nickel utilizing a low-lying dielectronic resonance

Wang, S. X. and Huang, Z. K. and Wen, W. Q. and Ma, W. L. and Wang, H. B. and Schippers, S. and Wu, Z. W. and Kozhedub, Y. S. and Kaygorodov, M. Y. and Volotka, A. V. and Wang, K. and Zhang, C. Y. and Chen, C. Y. and Liu, C. and Huang, H. K. and Shao, L. and Mao, L. J. and Ma, X. and Li, J. and Tang, M. T. and Yan, K. M. and Zhou, Y. B. and Yuan, Y. J. and Yang, J. C. and Zhang, S. F. and Ma, X. and Zhu, L. F. (2022) Precise determination of the 2s22p5-2s2p6 transition energy in fluorine-like nickel utilizing a low-lying dielectronic resonance. Preprint / Working Paper. arXiv, Ithaca, NY. (https://doi.org/10.48550/ARXIV.2205.01334)

[thumbnail of Wang-etal-ArXiv-2022-Precise-determination-of-the-2s22p5-2s2p6-transition]
Preview
 Text. Filename: Wang_etal_ArXiv_2022_Precise_determination_of_the_2s22p5_2s2p6_transition.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (2MB)| Preview

Abstract

High precision spectroscopy of the low-lying dielectronic resonances in fluorine-like nickel ions were determined by employing the merged electron-ion beam at the heavy-ion storage ring CSRm. The measured dielectronic resonances are identified by comparing with the most recent relativistic calculation utilizing the FAC code. The first resonance at about 86 meV due to the dielectronic recombination via (2s2p6[2S1/2]6s)J=1 intermediate state was recognized. The experimental determination of the resonance position at 86 meV reaches an uncertainty of 4 meV, which allows precise determination of the 2s22p5[2P3/2] - 2s2p6[2S1/2] transition energy. The Rydberg binding energy of the 6s electron in the (2s2p6[2S1/2]6s)J=1 state is calculated by the multi-configurational Dirac-HartreeFock and stabilization methods. The determined transition energies are 149.056(4)exp(10)theo and 149.032(4)exp(6)theo, respectively. Moreover, the transition energy has also been calculated by fully relativistic and ab initio approaches. Individual theoretical contributions are evaluated by employing the core-Hartree and Kohn-Sham screening potentials, respectively. High-order QED and correlation effects contribute prominently to the total transition energy. The present DR precision spectroscopy study at the CSRm paves the way for future precision measurements of atomic energy levels with heavier highly charged ions.

ORCID iDs

Wang, S. X., Huang, Z. K., Wen, W. Q., Ma, W. L., Wang, H. B., Schippers, S., Wu, Z. W., Kozhedub, Y. S., Kaygorodov, M. Y., Volotka, A. V., Wang, K., Zhang, C. Y. ORCID logoORCID: https://orcid.org/0000-0003-1935-6907, Chen, C. Y., Liu, C., Huang, H. K., Shao, L., Mao, L. J., Ma, X., Li, J., Tang, M. T., Yan, K. M., Zhou, Y. B., Yuan, Y. J., Yang, J. C., Zhang, S. F., Ma, X. and Zhu, L. F.;
CORE (COnnecting REpositories)