The infrared spectral absorptance of HC1 was measured experimentally at temperatures ranging from room temperature to 1200°K. The measured spectral absorptance was compared to that calculated from band model theories and from a simple isolated line model. Agreement between calculation and theory was good. The band model calculation fit the data best at high temperature; at low temperature, where the band model theory was less successful, the isolated line theory gave an excellent fit.
HAROLD J. BABROV, "Experimental and Theoretical Infrared Spectral Absorptance of HC1 at Various Temperatures," J. Opt. Soc. Am. 53, 945-950 (1963)