Abstract

The absorption spectrum of YbCl₃·6H₂O has two sharp lines near 9700 A which are interpreted as the transitions from the M=5/2 Stark component of the ²F_7/2 level of the Yb⁺⁺⁺ ion to the M=3/2 and 5/2 levels of the other doublet component ²F_5/2. The Zeeman splittings of the two lines were investigated at 4°K as a function of the orientation of the crystal. They can be interpreted by assuming that the crystal field has a pronounced magnetic symmetry axis (probably sixfold) perpendicular to the twofold symmetry axis of the crystal. The magnetic ellipsoid is degenerate into a pair of planes perpendicular to this axis. The direction of the magnetic axis is slightly different for the three observed states and bears no relation to the optic axes of the crystal.

© 1956 Optical Society of America

Absorption, Fluorescence, and Magnetic Properties of Gadolinium Chloride (GdCl₃·6H₂O)†

G. H. Dieke and L. Leopold
J. Opt. Soc. Am. 47(10) 944-954 (1957)

Absorption, Fluorescence, and Energy Levels of the Dysprosium Ion*

G. H. Dieke and Shobha Singh
J. Opt. Soc. Am. 46(7) 495-499 (1956)

Absorption Bands of Rubidium due to the Presence of Foreign Gases*

Shang-Yi Ch’en, Robert B. Bennett, and Oleg Jefimenko
J. Opt. Soc. Am. 46(3) 182-186 (1956)

On the Properties of Polarization Elements as Used in Optical Instruments. III. Angular Aperture Functions of a Positive Dichroic Film Polarizer*†‡

Lincoln Baxter
J. Opt. Soc. Am. 46(6) 435-442 (1956)

Infrared Transmission of Synthetic Atmospheres.* V. Absorption Laws for Overlapping Bands

D. E. Burch, J. N. Howard, and Dudley Williams
J. Opt. Soc. Am. 46(6) 452-455 (1956)