MEASUREMENTS OF INTENSITY ENHANCEMENTS DUE TO PERTURBATIONS IN $H_{2}$ O OVERTONE AND COMBINATION BANDS
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Date
1974
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Journal ISSN
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Publisher
Ohio State University
Abstract
Survey measurements of absolute strengths and widths have been made on $H_{2}O$ absorption bands near 10 700 $cm^{-1}$. Bands in this region are known to show significant intensity enhancement due to Fermi resonance and coriolis interactions between upper state vibration-rotation levels. More than 25 lines arising from the overtone band $3\nu_{1}$ and the combination bands $2\nu_{1} + \nu_{3}, \nu_{1} + 2\nu_{3}$ and $\nu_{1} + 2\nu_{2} + \nu_{3}$ were measured. The intensities of the observed $3\nu_{1}$ lines are enhanced by Coriolis interactions with the $2\nu_{1} + \nu_{3}$ lines. The observed $\nu_{1} + 2\nu_{2} + \nu_{3}$ and $\nu_{1} + 2\nu_{3}$ lines are enhanced by Fermi resonances with $2\nu_{1} + \nu_{3}$ lines. A number of lines in the dominant $2\nu_{1} + \nu_{3}$ band were also measured. The quantitative measurements of intensities agree quite well with the qualitative intensities obtained from the solar $spectrum.^{1}$
Description
This work was sponsored by the advanced Research Projects Agency. $^{1}$ J. Swensson, W. S, Benedict, L, Delbouille, and G. Roland, The Solar Spectrum from $\lambda$ 7498 to $\lambda$ 12016. A Table of Measures and Identifications, Mem. Soc. Roy. Sci. Leige, Special Volume 5 (1970).
Author Institution: Science Applications Inc.; Department of Physics, The University of Michigan
Author Institution: Science Applications Inc.; Department of Physics, The University of Michigan