THE COMET-TAIL AND BALDET-JOHNSON SYSTEMS OF $^{13}C^{18}O^{+1}$
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Date
1988
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Publisher
Ohio State University
Abstract
The emission spectra of the comet-tail $(A^{2}\Pi_{i} - X^{2}\Sigma^{+})$ and the Baldet-Johnson $(B^{2}\Sigma_{+} - A^{2}\Pi^{+})$ bands of the molecular ion $^{13}C^{18}O^{+}$, excited in the cathode glow of a hollow-cathode discharge tube of special design, and occurring in the spectral regions 3700 - 4225 {\AA} and 1620 - 6165 {\AA}, respectively, were observed for the first time. The rotational structure of seven bands of the A-X system involving $v^{\prime} = 0$ to 5 and $v^{\prime\prime} = 0$ to 2 and that of three (1-0, 0-0, and 1-0) bands of the B-X system were photographed in the 2nd and/or 3rd orders of 2 m and 3.4 m grating spectrographs. All the twelve branches of each of the bands of both systems (except only six branches for the 0-1 and 0-2 bands of the A-X system arising from $^{2}\Pi_{1/2} - X^{2}\sigma^{+}$) were rotationally analyzed. The molecular constants obtained from the analysis of the wavenumber data of the individual bands of both systems were merged together and a unique set of constants for the $^{2}\Sigma^{+} - A^{2}\Pi_{i}$ and $B^{2}\Sigma^{+}$ states of 13C18O+ was obtained.
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$^{1}$ Research supported in part by NSERC Grant No. A-2440
Author Institution: Department of Physics, Memorial University of Newfoundland
Author Institution: Department of Physics, Memorial University of Newfoundland