THE $\nu_{1}$ and $\nu_{2}$ BANDS OF DOBr AND THE ROTATIONAL SPECTRA OF THE $\nu_{2} = 1$ AND $\nu_{3} = 1$ STATES
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Date
1996
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Ohio State University
Abstract
The $\nu_{1}$ and $\nu_{2}$ bands of DOBr centered near 2673.2 and $853.4 cm^{-1}$ respectively have been observed at $0.006 cm^{-1}$ resolution. The $\nu_{1}$ band is perturbed by an anharmonic resonance ($\Delta K_{a} = 0$) with $3\nu_{3}+\nu_{2}$. In addition, the millimeter spectra arising from the $\nu_{2} = 1$ and $\nu_{3} = 1$ states have been observed. All rotational and vibrational spectra from both bromine isotopic species have been fitted with a single calculation. The perturbation in the $\nu_{1}$ band has been well described. Equilibrium rotational and centrifugal distortion constants have been determined. The equilibrium structure has been derived from the DOBr and HOBr rotational constants. The harmonic force field has been calculated and will be compared with that of HOCl and with those derived from ab initio calculations. Changes in quadrupole coupling with the BrO stretch and DOBr bend have been determined.
Description
Author Institution: Jet Propulsion Laboratory, California Institute of Technology; Department of Physics, Faculty of Science; Atomic Energy of Canada Limited, Chalk River Laboratories; Steacie Institute for Molecular Sciences, National Research Council of Canada; Institute for National Measurement Standards, National Research Council of Canada