Abstract

The first 11 successive pure rotational absorption lines of hydrogen fluoride vapor have been measured in the far infrared between 22 and 250 μ with a commercial grating spectrometer. Most of these transitions are reported here for the first time. The rotational constant B and the centrifugal stretching constant D calculated from the observed transitions amount to B₀=20.559±0.006 cm⁻¹, D₀=0.00211±0.00004 cm⁻¹, within their 95% confidence limit. These values agree extremely well with the ones obtained from reported rotation–vibration and pure rotational spectra. The experimental procedures are described. It is shown that the window material of the cell, polyethylene, gives rise to an extraneous band at 389.1 cm⁻¹ by a reaction with the sample.

© 1964 Optical Society of America

Rotational Spectrum of Hydrogen Fluoride: Frequencies and Linewidths*

Arthur A. Mason and Alvin H. Nielsen
J. Opt. Soc. Am. 57(12) 1464-1470 (1967)

Vibration–Rotation Bands of Deuterium Cyanide and Hydrogen Cyanide*

Arthur G. Maki, Earle K. Plyler, and Robert Thibault
J. Opt. Soc. Am. 54(7) 869-876 (1964)

Photoionization and Absorption Cross Sections of H₂ and D₂ in the Vacuum Ultraviolet Region

G. R. Cook and P. H. Metzger
J. Opt. Soc. Am. 54(8) 968-972 (1964)

Absorption Spectrum of Astatine*

Ralph McLaughlin
J. Opt. Soc. Am. 54(8) 965-967 (1964)

Emissivity of Carbon Dioxide at 4.3 μ

William O. Davies
J. Opt. Soc. Am. 54(4) 467-471 (1964)