Precision determinations of the origins of the fundamental and first four harmonic bands of HCl<sup>35</sup> have been made. The rotational constants of the 2-0 and 3-0 bands as well as the origin and rotational constants of the 2-0 band of DCl<sup>35</sup> are also reported. This work will be used in conjunction with additional measurements now in progress on the fundamental band of HCl and other bands of DCl to determine rotation-vibration constants for comparison with theoretical predictions.
D. H. RANK, W. B. BIRTLEY, D. P. EASTMAN, B. S. RAO, and T. A. WIGGINS, "Precise Measurements of Some Infrared Bands of Hydrogen Chloride," J. Opt. Soc. Am. 50, 1275-1279 (1960)