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High-accuracy 12C16O2 line intensities in the 2 micron wavelength region measured by frequency-stabilized cavity ring-down spectroscopy
Published
Author(s)
Hongming Yi, Philip Liu, Adam Fleisher, Joseph T. Hodges
Abstract
Reported here are highly accurate, experimentally measured ro-vibrational transition frequencies for the 12C16O2 (20012)<--(00001) band at λ = 2 µm. Measurements were performed by a frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) instrument designed to achieve precision molecular spectroscopy in this important region of the infrared. Through careful control and traceable characterization of CO2 sample conditions, and through high-fidelity measurements spanning several months in time, we achieve absolute uncertainties for the reported transition intensities between 0.07% and 0.46%. Such high accuracy spectroscopy is shown to provide a stringent test of ab initio dipole moment and potential energy surface, and therefore transition intensities calculated from first principles.
Citation
Journal of Quantitative Spectroscopy and Radiative Transfer
Yi, H.
, Liu, P.
, Fleisher, A.
and Hodges, J.
(2017),
High-accuracy <sup>12</sup>C<sup>16</sup>O<sub>2</sub> line intensities in the 2 micron wavelength region measured by frequency-stabilized cavity ring-down spectroscopy, Journal of Quantitative Spectroscopy and Radiative Transfer, [online], https://doi.org/10.1016/j.jqsrt.2017.12.008, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=922644
(Accessed October 15, 2025)