Measurements of the Hyperfine Structure of Atomic Energy Levels in Co ii
Measurements of the Hyperfine Structure of Atomic Energy Levels in Co ii
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DOI：
10.3847/1538-4365/abbdf8
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发表时间：
2020-12-01
影响因子：
8.7
通讯作者：
Pickering, Juliet C.
中科院分区：
文献类型：
--
作者：
Ding, Milan;Pickering, Juliet C.
利用傅里叶变换光谱仪在3000-63,000 cm(-1)(33333-1587A)范围内测量的钴谱，分析了单离化钴(Co II)的超精细结构常数。对700多条谱线的拟合得到292个磁偶极超精细相互作用A常数，其值在-32.5mK到59.5mK之间(1mK=0.001 cm(-1))。255个A常数的不确定度在0.4mK到3.0mK之间，其余37个不确定度在7mK以下。电四极超精细相互作用B常数只能对一个能级进行估算。已知A值的Co II能级的数量现在增加了10倍，改进并使Co II在天文化学丰度分析中得到更广泛、更可靠和更准确的应用。
Analysis of hyperfine structure constants of singly ionized cobalt (Co II) were performed on cobalt spectra measured by Fourier transform spectrometers in the region 3000-63,000 cm(-1) (33333 - 1587 A). Fits to over 700 spectral lines led to measurements of 292 magnetic dipole hyperfine interaction A constants, with values between -32.5 mK and 59.5 mK (1 mK = 0.001 cm(-1)). Uncertainties of 255 A constants were between 0.4 mK and 3.0 mK, the remaining 37 ranged up to 7 mK. The electric quadrupole hyperfine interaction B constant could be estimated for only one energy level. The number of Co II levels with known A values has now increased tenfold, improving and enabling the wider, more reliable, and accurate application of Co II in astronomical chemical abundance analyses.