Air-broadening in near-infrared carbon dioxide line shapes: Quantifying contributions from O 2 , N 2 , and Ar.
J Quant Spectrosc Radiat Transf
; 2702021 Aug.
Article
em En
| MEDLINE
| ID: mdl-38516121
ABSTRACT
We measured air broadening in the (30012) â (00001) carbon dioxide (CO2) band up to Jâ³=50 using frequency-agile rapid scanning cavity ring-down spectroscopy. By using synthetic air samples with varying levels of nitrogen, oxygen, and argon, multi-spectrum fitting allowed for the collisional broadening terms of each major air component to be simultaneously determined in addition to advanced line shape parameters at atmospherically relevant CO2 mixing ratios. These values were compared to broadener-specific line shape parameters from the literature. Fits to measured spectra were also constrained with results from requantized classical molecular dynamic simulations. We show that this approach enables differentiation between narrowing mechanisms in advanced line shape parameters retrieved from experimental spectra of limited signal-to-noise ratio.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Quant Spectrosc Radiat Transf
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Estados Unidos