Scientific Results

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

Year: 2018

Authors: Siciliani de Cumis M., Eramo R., Coluccelli N., Galzerano G., Laporta P., Cancio PC.

Autors Affiliation: [de Cumis, M. Siciliani] Agenzia Spaziale Italiana, Contrada Terlecchia, Matera, Italy.
[Eramo, R.; Pastor, P. Cancio] Univ Firenze, Dipartimento Fis, Ist Nazl Ott CNR, Via N Carrara 1, Sesto Fiorentino, Italy and European Lab Nonlinear Spect, Via N Carrara 1, Sesto Fiorentino, Italy.
[Coluccelli, N.; Galzerano, G.; Laporta, P.] Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, Milan, Italy
and CNR, Ist Foton & Nanotecnol, Piazza Leonardo da Vinci 32, Milan, Italy.

Abstract: We investigated a set of nineteen (CO2)-C-12-O-16 transitions of the 2 nu(1) + nu(3) ro-vibrational band in the spectral region from 5064 to 5126 cm(-1) 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(-1)], should be noticed, projecting direct-comb-Vernier-spectroscopy as an adequate tool for spectral intensity calibration. Published by AIP Publishing.

Journal/Review: JOURNAL OF CHEMICAL PHYSICS

Volume: 148 (11)      Pages from: 114303-1  to: 114303-8

KeyWords: Carbon; Carbon dioxide, Combination bands; Different pressures; Molecular absorption; Pressure-broadening coefficients; Spectral intensity; Spectroscopic parameters; Theoretical values; Transition frequencies, Spectrometers
DOI: 10.1063/1.5008461

Citations: 4
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