Vibrational relaxation of carbon dioxide in argon

Goro Kamimoto; Hiroyuki Matsui

doi:10.1063/1.1673870

Vibrational relaxation of carbon dioxide in argon

Goro Kamimoto^*, Hiroyuki Matsui

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Vibrational relaxation of CO₂(ν₃) diluted in Ar was studied over the temperature range 700-2000°K by using a shock-tube technique. Measurements were made by monitoring the infrared emission of the asymmetric stretching mode of CO₂ at 4.3 μ. The relaxation profile of CO₂(ν₃) was found to be nonexponential by intramolecular V-V couplings with other modes and all the modes in CO ₂ had approximately the same final relaxation time τf on CO ₂-Ar collisions. The relaxation time for the V-V process between ν_1,2 and ν₃ modes was estimated by using a simplified two-modes model.

Original language	English
Pages (from-to)	3990-3993
Number of pages	4
Journal	The Journal of chemical physics
Volume	53
Issue number	10
DOIs	https://doi.org/10.1063/1.1673870
State	Published - 15 Nov 1970

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abstract = "Vibrational relaxation of CO2(ν3) diluted in Ar was studied over the temperature range 700-2000°K by using a shock-tube technique. Measurements were made by monitoring the infrared emission of the asymmetric stretching mode of CO2 at 4.3 μ. The relaxation profile of CO2(ν3) was found to be nonexponential by intramolecular V-V couplings with other modes and all the modes in CO 2 had approximately the same final relaxation time τf on CO 2-Ar collisions. The relaxation time for the V-V process between ν1,2 and ν3 modes was estimated by using a simplified two-modes model.",

author = "Goro Kamimoto and Hiroyuki Matsui",

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AB - Vibrational relaxation of CO2(ν3) diluted in Ar was studied over the temperature range 700-2000°K by using a shock-tube technique. Measurements were made by monitoring the infrared emission of the asymmetric stretching mode of CO2 at 4.3 μ. The relaxation profile of CO2(ν3) was found to be nonexponential by intramolecular V-V couplings with other modes and all the modes in CO 2 had approximately the same final relaxation time τf on CO 2-Ar collisions. The relaxation time for the V-V process between ν1,2 and ν3 modes was estimated by using a simplified two-modes model.

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