Meggers William F, Tech Jack L
Institute for Basic Standards, National Bureau of Standards, Washington, D.C. 20234.
J Res Natl Bur Stand (1977). 1978 Jan-Feb;83(1):13-70. doi: 10.6028/jres.083.003.
Wavelengths and estimated intensities for 1791 lines of neutral ytterbium in the region 2155 to 31 308 Å are reported. The Zeeman effect has been investigated for 249 of these lines. Analysis of the data has resulted in classification of 787 lines as transitions between 102 even and 77 odd levels. Even levels have been assigned to the electron configurations 4 6 (the ground state), 4 6, 4 6, 4 6 6, 4 6 , 4 5 , and 4 566. Odd levels have been assigned to 4 6, 4 6, and 4 56 . Many odd levels are still unassigned, but the majority undoubtedly belong to the configuration 4 5 6.
报告了中性镱在2155至31308埃区域内1791条谱线的波长和估计强度。已对其中249条谱线研究了塞曼效应。数据分析结果是将787条谱线分类为102个偶能级与77个奇能级之间的跃迁。偶能级已被指定为电子组态4f⁶（基态）、4f⁶5d、4f⁶6s、4f⁵6s²、4f⁵5d6s、4f⁵5d²、4f⁵6p。奇能级已被指定为4f⁵6d、4f⁵7s、4f⁵6p。许多奇能级仍未指定，但大多数无疑属于组态4f⁵6d。
