ULTRAVIOLET ARGON ION LASER INDUCED FLUORESCENCE OF $Na_{2}^{*}$.

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1981

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Ohio State University

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Sin UV lines from an argon ion laser were used to study the laser induced fluorescence of the sodium molecule. The spectra, recorded in the second order of a half-meter spectrometer (1180 grooves/nm grating), show about 200 fluorescence lines. There are four R-P series and five Q series which we assign to the C-X system of $Na_{2}$. One of these originates at a very high $v’‘$ ground level $(v’‘ = 17)$ and shows emission almost exclusively on the blue side of the laser line. While the X state $constants^{1}$ reproduced energy levels very precisely, the C state $constants^{2}$ do not seem to do so, except for very low v^{\prime} and J^{\prime} levels. We will briefly discuss the spectra, the $C^{1}\Pi_{u}$ constants, the fluorescence intensities, and the behavior of the transition moment for the C-X system of $Na_{2}$.

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$^{*}$Supported by the National Science Foundation and the National Aeronautics and Space Administration. $^{1}$ P. Kusch and M. M. Hessel, J. Chem. Phys. 68, 2591 (1978).$^{2}$ R. F. Barrow, N. Travis and C. V. Wright, Nature 187, 141 (1960).
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