Total Absorptance of Carbon Monoxide and Methane in the Infrared

Abstract

The total absorptance ∫A(ν)dν of the major infrared bands of carbon monoxide and methane has been measured as functions of absorber concentration w and equivalent pressure Pe over wide ranges of these variables. The experimental results are presented graphically, and empirical equations relating ∫A(ν)dν, w, and Pe are presented. By employing small values of w and large values of Pe, it has been possible to determine the band strengths or intensities ∫k(ν)dν for the fundamental band of carbon monoxide and for ν2, ν3, and ν4 fundamentals of methane; the values obtained are compared with results of other investigators.