Sixty high odd levels of Yb II are interpreted as 4f135d2 levels. A least-squares fit with 10 parameters results in a rms error of 239 cm-1 (1.1% of the total width). Good agreement is also obtained between calculated and observed g factors. Designations in J1L11 coupling are given.
NISSAN SPECTOR, "4f135d2 Configuration of Singly Ionized Ytterbium (Yb II)," J. Opt. Soc. Am. 58, 837-842 (1968)