MOLECULAR BEAM VISIBLE-LASER SPECTROSCOPY OF $^{11}BO_{2}$
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Date
1990
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The hyperfine structures of various lines in the $<0,0>$ band of the $\bar{A}^{2}\Pi_{u}-\bar{X}^{2}\Pi_{g}$ system of $^{11}BO_{2}$, near 5450 {\AA}, have been recorded at very high resolution using molecular beam laser techniques. The results supplement the earlier R-branch measurements of Curl $et al^{1}$, which were taken using intermodulated fluorescence. In particular they show previously-unsuspected perturbations in the upper state hyperfine patterns at many of the places where the rotational lines have recently been found to be slightly $shifted^{2}$. Ground state parameters have been extracted from the combination differences, but no simple model can be devised to fit the upper state, which turns out to be randomly perturbed as a result of extensive vibronic coupling with high vibrational levels of the ground state.
Description
$^{1}$ R.S. Lowe, H. Gerhardt. W. Dillenschneider. R.F. Curl. Jr. and F.K. Tittel, J. Chem. Phys. 70,42 (1979). $^{2}$ A.G. Adam, A.J. Merer and D.M. Steunenberg, J. Chem. Phys. in press.
Author Institution: Department of Chemistry, University of British Columbia; Department of Physics, University of British Columbia
Author Institution: Department of Chemistry, University of British Columbia; Department of Physics, University of British Columbia