EXTENDED ANALYSIS OF THE INFRARED SPECTRUM OF $D^{3+}$
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Date
1992
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Publisher
Ohio State University
Abstract
The $\nu_{2}$ fundamental band of $D_{3}^{+}$ was first observed in 1980 by Shy, Farley, Lamb, and $Wing,^{1}$ and later studied in detail by Watson, Foster, and $McKellar,^{2}$ who used a tunable diode laser spectrometer and a large cooled hollow cathode cell with an absorption path of 11 m. Their analysis covered the region from 1670 to $2170 cm^{-1}$, and included J-values up to 8. The present work is an extension of this earlier analysis to cover a wider wavenumber range and higher J-values. We use small, high current density, hollow-cathode $cells^{3}$ with water cooling in order to record both emission $spectra,^{4}$ with a Bomem FT spectrometer, and absorption spectra, with a diode laser spectrometer. So far, we have assigned a number of new transitions in the R-branch from $2100-2300 cm^{-1}$, with J-values of up to 12. For J-values greater than about 7 in the excited $v_{2}=1$ state, Coriolis interactions with the $v_{1}=1$ state start to become significant for certain levels. These perturbations make it more difficult to locate and assign the affected transitions, but they also offer the possibility of gaining direct experimental information about the infrared forbidden $v_{1}$ vibration.
Description
1. J. T. Shy, J. W. Farley, W.E. Lamb, JR., and W.H. Wing, Phys. Rev. Lett. 45, 535 (1980). 2. J.K. G. Watson, S.C. Foster, and A.R.W. McKellar, Can. J. Phys. 65, 38 (1987). 3. W.A. Majewski, M.D. Marshall, A.R.W. McKellar, J.W.C. Johns, and J.K.G. Watson, J. Mol. Spectrosc. 122, 341 (1987). 4. W.A. Majewski, A.R.W. McKellar, and J.K.G. Watson, 45th Ohio State University Symposium on Molecular Spectroscopy, June 1990, Paper RF9.
Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada
Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada