New observations on the B state of the CH radical from UV multiphoton dissociation of ketene
Resource
Chemical Physics Letters 245 (6): 585-590
Journal
Chemical Physics Letters
Journal Volume
245
Journal Issue
6
Pages
585-590
Date Issued
1995
Author(s)
Chaung-Chi Wang
Nemes, L.
KING-CHUEN LIN
Abstract
In multiphoton dissociation experiments on ketene (CH2CO) using a UV dye laser emission spectra were observed in the 360-370 nm range. The spectra were seen only with a focused laser beam and consist of lines attributable to emission from rotational levels in the ν′ = 1 vibrational state of the B2Σ- electronic state of the methylidyne (CH) radical. In these spectra rotational transitions to the N′ = 7 level of the B state from the ground (X) state, ν″ = 0, were observed. Time-resolved fluorescence measurements on the N′ = 1, 2, 3, 4, 5 and 6 levels yielded lifetime data contributing to the existing values in the literature. Based on line broadening a lifetime estimate is given for the strongly predissociated N′ = 7 level. © 1995.
Type
journal article
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