Data provided by National Institute of Standards and Technology
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 %.
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Updated: 2026-09-19
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| Title | Mid-Infrared Line Intensity for the Fundamental (1–0) Vibrational Band of Carbon Monoxide (CO) |
|---|---|
| Description | 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 %. |
| Modified | 2025-08-06 00:00:00 |
| Publisher Name | National Institute of Standards and Technology |
| Contact | mailto:[email protected] |
| Keywords | cavity ring-down spectroscopy , carbon monoxide , line intensity , mid-infrared |
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"title": "Mid-Infrared Line Intensity for the Fundamental (1\u20130) Vibrational Band of Carbon Monoxide (CO)",
"description": "Here we apply cavity ring-down spectroscopy to measure the intensity of a rotational-vibrational transition within the fundamental (1\u20130) vibrational band of carbon monoxide (CO). Laser measurements were made at a wavenumber near 2206 cm\u22121 on a sample of CO-in-air with an amount fraction of \u03c7CO\u202f=\u202f77.6 nmol mol\u22121. 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\u202f=\u202f0.6 %, we report the R17 line intensity for the fundamental (1\u20130) vibrational band of 12C16O to be S\u202f=\u202f1.028\u202f\u00d7\u202f10\u221219 cm\u22121 molecule\u22121 (isotopologue abundance, \u03c7iso\u202f=\u202f100 %; temperature, T\u202f=\u202f296 K), a value which differs from HITRAN2020 by a relative amount of 2.2 %.",
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