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Pressure Broadening and Shifting of Rotation and Rotation-Vibration Spectral Lines of HCL by Noble Gases

Shifts of the line positions of the 2-0 band of HCl perturbed by noble gases, first measured in 1960 [1,2], were later augmented [3-10] by measurements of linewidths and shifts in the pure rotational and rotation-vibration spectra. To explain the experimental results, several theoretical calculations were performed [11-18] that used primarily the Anderson-Tsao-Curnutte (ATC) theory [19,20]. Whereas qualitative agreement with experiment was obtained, the quantitative agreement was poor.