Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W38+ based on advanced consideration of core electron correlations

doi:10.1088/1674-1056/adbdbe

中国物理B ›› 2025, Vol. 34 ›› Issue (5): 53101-053101.doi: 10.1088/1674-1056/adbdbe

Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W³⁸⁺ based on advanced consideration of core electron correlations

Guo-Qing Peng(彭国庆)¹, Kai Wang(王凯)², Jun Yan(颜君)^1,3,†, and Wei Kang(康炜)¹

1 Center for Applied Physics and Technology, Peking University, Beijing 100871, China;
2 Department of Physics and Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China;
3 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

收稿日期:2025-01-02 修回日期:2025-02-21 接受日期:2025-03-07 出版日期:2025-04-18 发布日期:2025-04-28
通讯作者: Jun Yan E-mail:yan_jun@iapcm.ac.cn
基金资助:
Project supported by the Science Challenge Project of China Academy of Engineering Physics (CAEP) (Grant No. TZ2018005) and the National Natural Science Foundation of China (Grant Nos. 12474277, 12374259, 12104095, 12074081, and 12074082).

Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W³⁸⁺ based on advanced consideration of core electron correlations

Guo-Qing Peng(彭国庆)¹, Kai Wang(王凯)², Jun Yan(颜君)^1,3,†, and Wei Kang(康炜)¹

1 Center for Applied Physics and Technology, Peking University, Beijing 100871, China;
2 Department of Physics and Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China;
3 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2025-01-02 Revised:2025-02-21 Accepted:2025-03-07 Online:2025-04-18 Published:2025-04-28
Contact: Jun Yan E-mail:yan_jun@iapcm.ac.cn
Supported by:
Project supported by the Science Challenge Project of China Academy of Engineering Physics (CAEP) (Grant No. TZ2018005) and the National Natural Science Foundation of China (Grant Nos. 12474277, 12374259, 12104095, 12074081, and 12074082).

摘要/Abstract

摘要： For the observed line at 799.23 Å in tungsten EBIT experiment, which was assigned to be $^{3}{\rm F}_{4}^{\rm o}-^{3}{\rm F}_{3}^{\rm o}$ ${\rm ([{\rm Ar}]4s^24{\rm p}^{5}{\rm 4d})}$ of W$^{38+}$ ion, there were noticeable deviations for most calculated wavelengths from the measured value. To clarify this issue, we carry out an extensive calculation for energy levels and transition properties of W$^{38+}$ ion using the multi-configuration Dirac-Hartree-Fock and relativistic configuration interaction method, in which more deeper inner core electron correlations are included, and different forms of Breit interaction as well as quantum electrodynamics corrections are investigated. It is found that the inner core electron correlations can affect the total energy of levels, while only slightly modify the excited energy of levels in 4s$^2$4p$^{5}$4d complex. The present calculated wavelengths agree with the corresponding measured values excellently except the line at 799.23 Å. Thus we are strongly suspicious this line should be misidentified, and suggest that new experiment with higher resolution and spectra analysis based on more accurate atomic data should be performed for W$^{38+}$ ion.

关键词: Kr-like W$^{38+}$, the multi-configuration Dirac-Hartree-Fock (MCDHF) method, electron correlation imbalance, Breit interaction, quantum electrodynamic (QED)

Abstract: For the observed line at 799.23 Å in tungsten EBIT experiment, which was assigned to be $^{3}{\rm F}_{4}^{\rm o}-^{3}{\rm F}_{3}^{\rm o}$ ${\rm ([{\rm Ar}]4s^24{\rm p}^{5}{\rm 4d})}$ of W$^{38+}$ ion, there were noticeable deviations for most calculated wavelengths from the measured value. To clarify this issue, we carry out an extensive calculation for energy levels and transition properties of W$^{38+}$ ion using the multi-configuration Dirac-Hartree-Fock and relativistic configuration interaction method, in which more deeper inner core electron correlations are included, and different forms of Breit interaction as well as quantum electrodynamics corrections are investigated. It is found that the inner core electron correlations can affect the total energy of levels, while only slightly modify the excited energy of levels in 4s$^2$4p$^{5}$4d complex. The present calculated wavelengths agree with the corresponding measured values excellently except the line at 799.23 Å. Thus we are strongly suspicious this line should be misidentified, and suggest that new experiment with higher resolution and spectra analysis based on more accurate atomic data should be performed for W$^{38+}$ ion.

Key words: Kr-like W$^{38+}$, the multi-configuration Dirac-Hartree-Fock (MCDHF) method, electron correlation imbalance, Breit interaction, quantum electrodynamic (QED)

中图分类号: (Electron correlation calculations for atoms and ions: excited states)

31.15.vj

31.15.am (Relativistic configuration interaction (CI) and many-body perturbation calculations) 31.15.xp (Perturbation theory) 32.70.Cs (Oscillator strengths, lifetimes, transition moments)

Guo-Qing Peng(彭国庆), Kai Wang(王凯), Jun Yan(颜君), and Wei Kang(康炜). Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W³⁸⁺ based on advanced consideration of core electron correlations[J]. 中国物理B, 2025, 34(5): 53101-053101.

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Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W³⁸⁺ based on advanced consideration of core electron correlations

Detailed discussion of discrepancy between theoretical and observed spectral lines in Kr-like W³⁸⁺ based on advanced consideration of core electron correlations

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