Radiative lifetime and quenching of the Ã2A1 state of the CH3O radical

Shiaw Ruey Lin*, Yuan-Pern Lee, J. B. Nee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The laser-induced fluorescence technique has been employed to study the first excited electronic stated Ã2A1 of CH 3O. Vibrational levels v′3 = 0-7 of the à state were excited and fluorescence decay rates were measured. Compared to a value 2.2 ± 0.2 μs at V′3 = 0, a significant decrease of decay rate was found at 277.6 nm (0.89 μs, v′3 = 7). Excitation to higher levels further reduced the lifetime. The predissociation threshold was estimated to be slightly above 276 nm (36 220 cm-1). The electronic quenching rates of the à state (v′ = 0-2) by CH 3OH, O2, NO2, and N2 have also been determined and are compared with those of OH in the à state.

Original languageEnglish
Pages (from-to)171-175
Number of pages5
JournalThe Journal of Chemical Physics
Issue number1
StatePublished - 1 Jan 1988

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