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Title:AIR COMPONENT FOREIGN BROADENING CONTRIBUTIONS TO CARBON DIOXIDE COLLISIONAL LINE SHAPES IN THE (30012) ← (00001) BAND
Author(s):Adkins, Erin M.
Contributor(s):Hodges, Joseph T.; Gamache, Robert R.; Vispoel, Bastien ; Long, David A.
Subject(s):Lineshapes, collisional effects
Abstract:Line-by-line spectroscopic databases of CO$_2$ such as those in HITRAN include so many transitions and bands that it is intractable to provide reference data for every transition and relevant collisional partner. To address this dilemma, theoretical line parameters enabling widespread coverage need to be validated in terms of accurate spectroscopic measurements having well-established uncertainties. In this work, we present frequency-agile, rapid scanning cavity ring-down spectroscopy (FARS) measurements of CO$_{2}$ (30012) $\leftarrow$ (00001) band transitions up to J'' = 50. These data correspond to foreign broadening by four gas mixtures: air, N$_2$, and two Ar-enriched synthetic air samples, with each sample containing CO$_2$ at a mole fraction near atmospheric levels. The measured O$_2$, N$_2$, and Ar foreign broadening parameters were determined using a NIST-developed multi-spectrum fitting algorithm which used appropriate constraints for pressure, temperature, and sample composition. These experimental results are compared to theoretical semiclassical half-widths$^{1}$ as well as to literature values. 1. R. R. Gamache, J. Lamouroux, A. L. Laraia, J.-M. Hartmann and C. Boulet, Journal of Quantitative Spectroscopy and Radiative Transfer 113 (11), 976-990 (2012).
Issue Date:26-Jun-20
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/107346
Date Available in IDEALS:2020-06-26


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