Collision-induced population transfer in infrared absorption spectra. III. Temperature dependence of absorption in the Ar-broadened wing of CO2 ν3 band
- 15 August 1990
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 93 (4) , 2217-2221
- https://doi.org/10.1063/1.459054
Abstract
We present experimental and theoretical results on the absorption in the Ar‐broadened wing of the infrared CO2 ν3 band. Measurements have been made in the 293–765 K temperature range for total gas pressures up to 60 bar and are in good agreement with previous determinations at room temperature. Calculations have been carried out by using a line by line coupling theory presented and tested previously [J. Chem. Phys. 8 9, 625 (1988) and 9 1, 2163 (1989)]. The theoretical approach accounts for both line mixing and the wave‐number dependence of the relaxation operator. It enables correct modeling of the temperature dependence of absorption. The strong sublorentzian absorption resulting from competitions between negative and positive individual line contributions is analyzed.Keywords
This publication has 11 references indexed in Scilit:
- Temperature-dependent measurements and modeling of absorption by CO2-N2 mixtures in the far line-wings of the 4.3μm CO2 bandJournal of Quantitative Spectroscopy and Radiative Transfer, 1989
- Collisionally induced population transfer effect in infrared absorption spectra. II. The wing of the Ar-broadened ν3 band of CO2The Journal of Chemical Physics, 1989
- Measurements of pure CO_2 absorption beyond the ν_3 bandhead at high temperatureApplied Optics, 1989
- Measurements and calculations of CO2 room-temperature high-pressure spectra in the 4.3 μm regionThe Journal of Chemical Physics, 1989
- Collisionally induced population transfer effect in infrared absorption spectra. I. A line-by-line coupling theory from resonances to the far wingsThe Journal of Chemical Physics, 1988
- Temperature dependence of the absorption in the region beyond the 43-μm band head of CO_2 2: N_2 and O_2 broadeningApplied Optics, 1985
- Temperature dependence of the absorption in the region beyond the 43-μm band head of CO_2 1: Pure CO_2 caseApplied Optics, 1985
- Mean square torque from linear molecule-rare gas atom systems at intermediate pressuresMolecular Physics, 1983
- Largeurs des raies de la transition 00°1 → (10°0; 02°0)I de CO2 perturbe par l'argonJournal of Quantitative Spectroscopy and Radiative Transfer, 1974
- Absorption of Infrared Radiant Energy by CO_2 and H_2O IV Shapes of Collision-Broadened CO_2 Lines*Journal of the Optical Society of America, 1969