SPECTRAL ATIAS OF NITROGEN DIOXIDE : 5530-6479 \AA \
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Date
1977
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Ohio State University
Abstract
A monograph is being prepared on the $NO_{2}$ visible spectrum in the region 5500-6800 \AA . The $NO_{2}$ absorption spectra were photographed on the Argonne National Laboratory 9.1 meter spectrograph with a dispersion of about 0.4 \AA /mm. Positions of approximately 19 000 lines were measured relative to thorium emission standards, using a Grant comparator (National Bureau of Standards, Boulder, Colorado). The reproducibility of unblended lines is about $\pm 0.01 cm^{-1}$. It is our intention to present along with microdensitometer tracings, the measured line frequencies $(cm^{-1})$, wavelengths (\AA), relative intensities, and line-shape appearances. We have also collected the fragmentary portions of the $NO_{2}$ visible spectrum for which line identifications have been made. Of particular interest are the unpublished laser excitation spectra of supersonically cooled $NO_{2}$ molecules, obtained by Smalley, Wharton, and Levy. We also provide an annotated bibliography of about 500 references pertaining to the structural and spectroscopic properties of the $NO_{2}$ molecule. It is hoped that this work will serve as a guide to past studies, as well as to stimulate further studies. The line listings and microdensitometer traces may perhaps even prove useful as a wavelength standard for calibration purposes.
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Author Institution: Department of Chemistry, Columbia University