A Comparison of Lineshape Models in the Analysis of Modulated and Natural Rotational Line Profiles: Application to the Pressure Broadening of OCS and CO
✍ Scribed by Cristina Puzzarini; Luca Dore; Gabriele Cazzoli
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 189 KB
- Volume
- 216
- Category
- Article
- ISSN
- 0022-2852
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✦ Synopsis
We report on the self and pressure broadening of the J = 9 ← 8 transition of O 12 CS and O 13 CS and the J + 1 ← J , with J = 0, 1, 2, 3, rotational transitions of 12 CO and 13 CO. In particular, the J = 9 ← 8 of OCS and J = 1 ← 0 of CO have been investigated for a detailed comparison of lineshape models in the analysis of natural and modulated line profiles. Since the frequency modulation technique improves the instrumental sensitivity, allowing the study of weak transition line profiles, a thorough test of this technique applied to lineshape analysis has been carried out. Finally, the self and pressure broadening coefficients are also given. Due to the important role covered by CO in the atmospheric chemistry field, we have paid particular attention to the N 2 and O 2 broadening.