Line-mixing and collision induced absorption for O2–CO2 mixtures in the oxygen A-band region
| Autor: | Ha Tran, Jean-Michel Hartmann, M. Vangvichith |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Radiation
Materials science business.industry Extraction (chemistry) Analytical chemistry Mixing (process engineering) chemistry.chemical_element Collision Oxygen Atomic and Molecular Physics and Optics Spectral line Optics chemistry Absorption (chemistry) business Spectroscopy Intensity (heat transfer) Line (formation) |
| Zdroj: | Journal of Quantitative Spectroscopy and Radiative Transfer. 110:2212-2216 |
| ISSN: | 0022-4073 |
| DOI: | 10.1016/j.jqsrt.2009.06.002 |
| Popis: | The absorption by O 2 –CO 2 mixtures in the region of the oxygen A-band near 760 nm has been measured in the laboratory at room temperature and for total pressures up to about 80 atm. As done in our previous studies for O 2 –N 2 mixtures the contribution of the “allowed” A-band transitions have been calculated both accounting for line-mixing effects and disregarding this process. The differences between computed spectra and measured values enable extraction of the collision induced absorption (CIA) contribution, which, after removal of the O 2 –O 2 contribution, provides, for the first time, the O 2 –CO 2 CIA. It is shown that neglecting line-mixing overestimates absorption in the wings and underestimates absorption at the P and R branch peaks, and that the O 2 –CO 2 CIA has an integrated intensity, in the A-band region, about 1.5 times larger than that of for pure O 2 and almost 10 times greater than for O 2 –N 2 . |
| Databáze: | OpenAIRE |
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