High-accuracy 12C16O2 line intensities in the 2 micron wavelength region measured by frequency-stabilized cavity ring-down spectroscopy

Published

December 13, 2017

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

Volume

206

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.jqsrt.2017.12.008

Local Download

Citation

Yi, H. , Liu, P. , Fleisher, A. and Hodges, J. (2017), High-accuracy ¹²C¹⁶O₂ 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)