Abstract

The shifts of the spectral lines P(4)–R(6) of the fundamental vibration–rotation band of hydrogen fluoride caused by the presence of carbon dioxide were measured. The pattern followed by these shifts in the R branch was the same as that found by Jaffe et al., for the case of the 1–0 band of HF broadened by krypton. Data were available for only the R branch. The shifts, however, were smaller than those produced by krypton. A new approach to the application of the equivalent-width method for measuring spectral-line width was developed. The half-widths of the CO₂-broadened lines of the 1–0 band of HF decreased sharply and monotonically as functions of the |m|. The variation followed very closely that reported by Babrov for the 1–0 band of HCl broadened by CO₂. The line shapes were investigated for the lines which could be corrected for instrumental broadening. The effect of the CO₂ broadener upon the line shape seems to be to flatten the peak and to elevate the wings. The Lorentz exponent, η, decreased from 2.00, for the narrowest lines, to 1.85 for the widest lines investigated. Experimental evidence was obtained in support of the assumption that line intensities are dependent on only the amount of the absorber present.

© 1969 Optical Society of America

Absorption of Infrared Radiant Energy by CO₂ and H₂O. IV. Shapes of Collision-Broadened CO₂ Lines*

Darrell E. Burch, David A. Gryvnak, Richard R. Patty, and Charlotte E. Bartky
J. Opt. Soc. Am. 59(3) 267-280 (1969)

Collisional Broadening of CO Absorption Lines by Foreign Gases*

David A. Draegert and Dudley Williams
J. Opt. Soc. Am. 58(10) 1399-1403 (1968)

Infrared Spectrum of Hydrogen Fluoride: Line Positions and Line Shapes. Part II. Treatment of Data and Results*

W. F. Herget, W. E. Deeds, N. M. Gailar, R. J. Lovell, and A. H. Nielsen
J. Opt. Soc. Am. 52(10) 1113-1119 (1962)

Foreign-Gas Broadening of Nitrous Oxide Absorption Lines

Lloyd D. Tubbs and Dudley Williams
Appl. Opt. 11(3) 551-553 (1972)

Calculations of Collision Narrowing of the Quadrupole Lines in Molecular Hydrogen

Thomas C. James
J. Opt. Soc. Am. 59(12) 1602-1606 (1969)