Mid-Infrared line intensity for the fundamental (1–0) vibrational band of carbon monoxide (CO)

Author(s)

D. Michelle Bailey, Gar Wing Truong, Bradley D. Hall, Andrew M. Crotwell, Kimberly J. Harris, Jennifer Carney, Catherine Nguyen, Seth B. Cataño-Lopez, Lukas W. Perner, Valentin J. Wittwer, Thomas Südmeyer, Oliver H. Heckl, Joseph T. Hodges, Garrett D. Cole, Adam J. Fleisher

Abstract

Here we apply cavity ring-down spectroscopy to measure the intensity of a rotational-vibrational transition within the fundamental (1–0) vibrational band of carbon monoxide (CO). Laser measurements were made at a wavenumber near 2206 cm−1 on a sample of CO-in-air with an amount fraction of χCO = 77.6 nmol mol−1. High-precision cavity ring-down spectra were acquired using hybrid amorphous-crystalline mirrors to form the optical resonator and by application of simple and robust laser scanning and control techniques. With a relative combined standard uncertainty of uS = 0.6 %, we report the R17 line intensity for the fundamental (1–0) vibrational band of 12C16O to be S = 1.028 × 10−19 cm−1 molecule−1 (isotopologue abundance, χiso = 100 %; temperature, T = 296 K), a value which differs from HITRAN2020 by a relative amount of 2.2 %.

Organisation(s)

Faculty Center for Nano Structure Research

External organisation(s)

National Institute of Standards and Technology, Gaithersburg, Thorlabs Inc., James J. Howard Marine Sciences Laboratory, University of Colorado, Boulder, Université de Neuchâtel, University of Arizona

Journal

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume

347

No. of pages

9

ISSN

0022-4073

DOI

https://doi.org/10.1016/j.jqsrt.2025.109652

Publication date

12-2025

Peer reviewed

Yes

Austrian Fields of Science 2012

104026 Spectroscopy, 103021 Optics

Keywords

ASJC Scopus subject areas

Radiation, Atomic and Molecular Physics, and Optics, Spectroscopy

Portal url

https://ucrisportal.univie.ac.at/en/publications/076d3c15-050c-477d-b7e3-cc8240a0c167