Abstract

The spectrum of neutral mercury has been observed in the region between 1 and 2.0μ, with a high-resolution grating spectrometer employing a lead sulfide detector. A noteworthy feature of the new observations is the essentially complete resolution of the D-F multiplets involving both first and second members of F series. Such resolution was achieved only with a low-pressure source. All new lines have been classified. A few changes in existing classifications and minor revisions in term values are suggested.

© 1953 Optical Society of America

The First Spectrum of Iodine in the Region Between 0.8 and 2.2 μ*

Frances E. Eshbach and Russell A. Fisher
J. Opt. Soc. Am. 44(11) 868-869 (1954)

The Spectrum of Nitrogen Dioxide in the 1.4–3.4μ Region and the Vibrational and Rotational Constants of the NO₂ Molecule*

Gordon E. Moore
J. Opt. Soc. Am. 43(11) 1045-1050 (1953)

Rotation-Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing PathsXI. The Spectrum of Carbon Dioxide (Co₂) below 1.25μ*

G. Herzberg and L. Herzberg
J. Opt. Soc. Am. 43(11) 1037-1044 (1953)

The Magnesium Arc Spectrum in the Near Infrared*

Russell A. Fisher and Frances E. Eshbach
J. Opt. Soc. Am. 43(11) 1030-1032 (1953)

Interferometric Wavelength Measurement in the Infrared by the Method of Exact Orders.* Precision Measurement of the Index of Refraction of Air at 1.65μ

D. H. Rank, E. R. Shull, Jean M. Bennett, and T. A. Wiggins
J. Opt. Soc. Am. 43(11) 952-956 (1953)