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

Published

August 31, 2025

Author(s)

Diana Bailey, GAR WING TRUONG, Bradley Hall, Kimberly Harris, Jennifer Carney, Catherine Nguyen, Seth Cantano-Lopez, Lukas W. Perner, Valentin Wittwer, Thomas Sudmeyer, OLIVER HECKL, Joseph Hodges, Garrett Cole, Adam 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 %.

Citation

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume

347

Pub Type

Journals

Download Paper

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

Local Download

Keywords

Cavity ring-down spectroscopy, Carbon monoxide, Line intensity, Mid-infrared

Citation

Bailey, D. , TRUONG, G. , Hall, B. , Harris, K. , Carney, J. , Nguyen, C. , Cantano-Lopez, S. , Perner, L. , Wittwer, V. , Sudmeyer, T. , HECKL, O. , Hodges, J. , Cole, G. and Fleisher, A. (2025), Mid-Infrared line intensity for the fundamental (1–0) vibrational band of carbon monoxide (CO), Journal of Quantitative Spectroscopy and Radiative Transfer, [online], https://doi.org/10.1016/j.jqsrt.2025.109652, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959633 (Accessed November 25, 2025)