Vibrational relaxation of carbon dioxide in argon

Goro Kamimoto*, Hiroyuki Matsui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Vibrational relaxation of CO23) 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 CO23) 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.

Original languageEnglish
Pages (from-to)3990-3993
Number of pages4
JournalThe Journal of chemical physics
Issue number10
StatePublished - 15 Nov 1970


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