The rotational spectrum of nitric acid: The first five vibrational states

Richard L. Crownover, Randy A. Booker, Frank C. de Lucia, Paul Helminger

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Abstract

With the work reported here, we have completed a series of rotational analyses of the v9, v7, v6, and v8 vibrational states of the important atmospheric species nitric acid. In this paper, we report the details of our work on the v8 vibrational state, which arise from the NO2 out of plane vibration. For this state, over 210 transitions have been measured in the millimeter and submillimeter spectral region and analyzed with Watson's A reduced centrifugal distortion Hamiltonian. In the course of our work on the excited vibrational states, a number of additional lines of the ground state have been observed and a more complete analysis of the ground state is provided. Also included in this work is a comparison of all these spectra and an overview of the millimeter and submillimeter spectra associated with these states. Although at the high sensitivity available in laboratory experiments, many additional lines are observable, all arise from vibrational states whose populations are more than 100 times lower than the ground state. The most prominent of these are due to the states which give rise to the perturbed 2v9 and v5 bands near 11μm. These results provide a significant data base for both atmospheric remote sensing experiments and spectral analyses of data in other spectral regions, especially the infrared (i.r.).

Original languageEnglish (US)
Pages (from-to)39-46
Number of pages8
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume40
Issue number1
DOIs
Publication statusPublished - Jul 1988

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ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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