Abstract

The shape of the far wing of self- and N₂-broadened CO₂ lines has been investigated in the 2150–2250-cm⁻¹ spectral region, i.e., on the low wavenumber side of the lines of the very intense ν₃ band of ¹²C¹⁶O₂ in a temperature range of atmospheric interest (200–300 K). The experimental results have been compared to calculated values based on the AFGL 1986 compilation. It appears that a symmetrical sub-Lorentzian line shape based on experiments made on the high wavenumber side cannot reproduce experiments. Comparison with experiments made at room temperature shows that the asymmetry of the correcting line shape factor χ strongly increases when decreasing the temperature.

© 1991 Optical Society of America

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)

Line shape in the low-frequency wing of self-broadened CO₂ lines

V. Menoux, R. Le Doucen, and C. Boulet
Appl. Opt. 26(3) 554-562 (1987)

Temperature dependence of the absorption in the region beyond the 4.3-μm band head of CO₂. 2: N₂ and O₂ broadening

C. Cousin, R. Le Doucen, C. Boulet, and A. Henry
Appl. Opt. 24(22) 3899-3907 (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)

Measurements of pure CO₂ absorption beyond the ν₃ bandhead at high temperature

Jean-Michel Hartmann and Marie-Yvonne Perrin
Appl. Opt. 28(13) 2550-2553 (1989)