Iglesias L, Cabeza M I, Rico F R, Garcia-Riquelme O, Kaufman V
Instituto de Optica, Serrano 121. 28006-Madrid ( Spain ).
National Institute of Standards and Technology, Gaithersburg, MD 20899.
J Res Natl Inst Stand Technol. 1989 Jul-Aug;94(4):221-258. doi: 10.6028/jres.094.023.
The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5, 5 6 and 5 6 even configurations and 164 levels of the interacting 5 6 and 5 6 6 odd ones. A total of 2636 lines have been classified as transitions between the 235 experimentally determined levels. Comparison between the observed levels and those calculated from matrix diagonalizations with least-squares fitted parameters shows an rms deviation of ±87 cm for the even configurations and ±450 cm for the odd ones.
双电离钨（W III）光谱是在滑动火花放电中产生的，并使用美国国家标准与技术研究院（NIST）的10.7米正入射真空光谱仪在600 - 2680 Å光谱区域进行了照相记录。分析得出了相互作用的5、5 6和5 6偶数组态的71个能级，以及相互作用的5 6和5 6 6奇数组态的164个能级。总共2636条谱线被归类为235个实验测定能级之间的跃迁。将观测到的能级与通过最小二乘法拟合参数进行矩阵对角化计算得到的能级进行比较，结果表明偶数组态的均方根偏差为±87 cm，奇数组态的为±450 cm。
