THE MILLIMETER AND SUBMILLIMETER-WAVE ROTATIONAL SPECTRUM OF THE $8^{1}9^{1}$, $6^{1}7^{1}$, AND $2^{1}$ VIBRATIONAL STATES OF NITRIC ACID
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Date
2006
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Publisher
Ohio State University
Abstract
The measurement and analysis of the rotational spectrum of nitric acid in $8^{1}9^{1}$, $6^{1}7^{1}$, and $2^{1}$ vibrational states will be presented. Measurements over the frequency range of 78-118 GHz were made with a phased locked BWO synthesizer and measurements from 118-520 GHz were made using the FASSST spectrometer with a heated cell. The rotational transitions in the $8^{1}9^{1}$ and $6^{1}7^{1}$ states exhibit a $\sim$3.5 MHz and $\sim$1.5 MHz torsional splitting, respectively, and a set of torsional parameters were required to fit the spectra. A Fermi interaction between the $8^{1}9^{1}$ and $6^{1}7^{1}$ states was also included in order to fit all of the observed transitions. There is no resolvable torsional splitting in the $2^{1}$ state and it is free from strong perturbations within the range of measured transitions. The assignments and on-going analyses of several other vibrational states will also be presented.
Description
Author Institution: Department of Physics, Wright State University, Dayton OH 45435; Department of Physics, University of South Alabama, Mobile, AL 36688; Department of Physics, The Ohio State University, Columbus, OH 43210