Intensity and Line-Width of the 15-Micron CO2 Band, Determined by a Curve-of-Growth Method

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Abstract
The intensity of the 15 μ band of CO2 has been redetermined by a curve‐of‐growth method, utilizing simple formulas derived for the absorption coefficient of the Q branch. The value obtained is 240 cm—1 per cm at S.T.P., some 25 to 30% higher than the results of the Wilson‐Wells method. Extrapolation methods in general can lead to considerable underestimation of intensity, especially when applied to bands containing narrow Q branches. The nitrogen‐broadened half‐width at one atmosphere and 298K is 0.064 cm—1.