Abstract

In this paper we present the first accurate determination, from laboratory measurements, of the temperature dependence of CO₂ continuous absorption beyond the ν₃ band head, with N₂ and O₂ as perturbers. The χ form factors previously published have been tested and optimized, and new form factors are proposed. It has been clearly demonstrated for N₂, as well as for O₂ broadening, that a χ factor independent of T in the range 193 ≤ T ≤ 300 K gives calculated values of the absorption coefficient in fair agreement (±20% level) with observed values in the spectral region 2400 < σ < 2500 cm⁻¹.

© 1985 Optical Society of America

Temperature dependence of the absorption in the region beyond the 4.3-μm band head of CO₂. 1: Pure CO₂ case

R. Le Doucen, C. Cousin, C. Boulet, and A. Henry
Appl. Opt. 24(6) 897-906 (1985)

Air broadened linewidths, intensities, and spectral line shapes for CO₂ at 4.3 μm in the region of the AMTS instrument

C. Cousin, R. Le Doucen, J. P. Houdeau, C. Boulet, and A. Henry
Appl. Opt. 25(14) 2434-2439 (1986)

Line shape in the low frequency wing of self- and N₂-broadened ν₃ CO₂ lines: temperature dependence of the asymmetry

Victor Menoux, Roger Le Doucen, Joel Boissoles, and Christian Boulet
Appl. Opt. 30(3) 281-286 (1991)

Line shape in the low-frequency wing of N₂ and O₂ broadened CO₂ lines

V. Menoux, R. Le Doucen, and C. Boulet
Appl. Opt. 26(23) 5183-5189 (1987)

Spectral line shapes for carbon dioxide in the 4.3-μm band

Mark W. P. Cann, R. W. Nicholls, P. L. Roney, A. Blanchard, and F. D. Findlay
Appl. Opt. 24(9) 1374-1384 (1985)