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 Å). Fits to over 700 spectral lines led to measurements of 292 magnetic dipole hyperfine interaction A constants, with values between −32.5mK and 59.5mK (1 mK = 0.001 cm⁻¹). Uncertainties of 255 A constants were between 0.4mK and 3.0mK, the remaining 37 ranged up to7mK. 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.

单电离钴 (Co II) 的超精细结构常数的分析是在由傅立叶变换光谱仪在 3000–63,000 cm ^-1 (33333 – 1587 Å)区域测量的钴光谱上进行的。拟合超过 700 条谱线导致测量了 292 个磁偶极子超精细相互作用A常数，其值介于 -32.5mK 和 59.5mK（1 mK = 0.001 cm ^-1）之间。255 A常数的不确定度介于 0.4mK 和 3.0mK 之间，其余 37个常数的不确定度高达 7mK。电四极超精细相互作用B常数只能估计一个能级。已知A的 Co II 水平数 现在，Co II 值增加了十倍，改进并实现了 Co II 在天文化学丰度分析中的更广泛、更可靠和准确的应用。