Re-evaluation and clarification of discrepancies in hyperfine structure constants of Nb II based on experimental and semi-empirical data

IF 2 3区物理与天体物理 Q2 OPTICS

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI:10.1016/j.jqsrt.2026.109852

L. Windholz , S. Kröger , J. Ruczkowski , M. Elantkowska

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引用次数: 0

Abstract

Recently, revised energy values of the Nb II levels have been published, based on precise determinations of the center of gravity (cg) wavenumbers of 1121 spectral lines [ADNDT 159 (2024) 101664]. For finding the cg wave numbers for lines with widely spread hyperfine (hf) structure patterns it is necessary to know the hf constants of the involved energy levels, which are also revised or new determined in this paper. Based on these results, new semi-empirical studies of the fine- and hf-structure of Nb II were published [JQSRT 344 (2025) 109512 and 346 (2025) 109583]. In the ADNDT-paper, experimental A-values of 349 levels are given. For the majority of the levels the semi-empirically determined A-values agree well with the experimental ones, but for 28 levels a conspicuous deviation can be noticed. In the present work we tried to clarify these discrepancies. For 14 of these 28 levels revised A-values are given. For the remaining 14 levels the previously published experimental values were retained.

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基于实验和半经验数据的铌II超精细结构常数差异的重新评价和澄清

最近，根据对1121条谱线[ADNDT 159(2024) 101664]的重心（cg）波数的精确测定，修正了Nb II能级的能量值。为求具有广泛分布的超精细结构谱线的cg波数，需要知道所涉及能级的hf常数，本文也对这些常数进行了修正或重新确定。基于这些结果，发表了新的Nb II精细和高频结构的半经验研究[JQSRT 344(2025) 109512和346(2025)109583]。本文给出了349个能级的实验a值。对于大多数水平，半经验确定的a值与实验值一致，但对于28个水平，可以注意到明显的偏差。在目前的工作中，我们试图澄清这些差异。对于这28个级别中的14个，给出了修订后的a值。对于其余14个水平，保留先前公布的实验值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Quantitative Spectroscopy & Radiative Transfer 物理-光谱学

CiteScore

5.30

自引率

21.70%

发文量

273

审稿时长

58 days

期刊介绍： Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer: - Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas. - Spectral lineshape studies including models and computational algorithms. - Atmospheric spectroscopy. - Theoretical and experimental aspects of light scattering. - Application of light scattering in particle characterization and remote sensing. - Application of light scattering in biological sciences and medicine. - Radiative transfer in absorbing, emitting, and scattering media. - Radiative transfer in stochastic media.