Abstract
Experimental transmittance data are given for mixtures of water vapor and nitrogen for the 14–20 μ region of the pure rotation band of water vapor. These data yield a set of transmittance functions for 55-cm−1 intervals in agreement with a theoretical curve of Benedict. Average transmittance is plotted as a function of the parameter U = WP*, in which W is the vapor optical path in precipitable centimeters and P* an effective pressure. This effective pressure is the sum of the total pressure and the water vapor partial pressure multiplied by a variable self-broadening factor. The set of transmittance functions in turn yields a generalized absorption coefficient for the region.
© 1966 Optical Society of America
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