Multiplexed direct-frequency-comb Vernier spectroscopy of carbon dioxide 2ν 1 + ν 3 ro-vibrational combination band

We investigated a set of nineteen C O transitions of the 2ν + ν ro-vibrational band in the spectral region from 5064 to 5126 cm at different pressures, using frequency-comb Vernier spectroscopy. Our spectrometer enabled the systematic acquisition of molecular absorption profiles with high precision....

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Bibliographic Details
Published inThe Journal of chemical physics Vol. 148; no. 11; p. 114303
Main Authors Siciliani de Cumis, M, Eramo, R, Coluccelli, N, Galzerano, G, Laporta, P, Cancio Pastor, P
Format Journal Article
LanguageEnglish
Published United States 21.03.2018
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Summary:We investigated a set of nineteen C O transitions of the 2ν + ν ro-vibrational band in the spectral region from 5064 to 5126 cm at different pressures, using frequency-comb Vernier spectroscopy. Our spectrometer enabled the systematic acquisition of molecular absorption profiles with high precision. Spectroscopic parameters, namely, transition frequency, linestrength, and self-pressure broadening coefficient, have been accurately determined by using a global fit procedure. These data are in agreement with theoretical values contained in HITRAN2016 database [I. E. Gordon et al., J. Quant. Spectrosc. Radiat. Transfer 203, 3-69 (2017)] at the same precision level. A moderate improvement of the line intensity determinations, by a factor 1.5 in the best case [P(10) transition at 5091.6 cm ], should be noticed, projecting direct-comb-Vernier-spectroscopy as an adequate tool for spectral intensity calibration.
ISSN:1089-7690
DOI:10.1063/1.5008461