LASER INDUCED FLUORESCENCE OF $^{6}Li_{2}$ USING AN ARGON ION $LASER^{*}$
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Date
1981
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Ohio State University
Abstract
The fluorescence spectra of the $B^{1}\Pi _{u} - X^{1}\Sigma ^{+}_{g}$ system of $^{6}LI_{2}$ excited by the visible CW lines of the argon ion laser have been reported by velasco. Ottinger and $Zare^{1}$. Recently Lightman and $Mature^{2}$ have reported calculations of the possible B-X transitions of the $^{6}LI_{2}$ molecule that are near coincident with eight different visible argon ton laser frequencies. We have carried out the laser induced fluorescence of $^{6}LI_{2}$ for all these lines and identified a number of new series. We have also calculated the relative intensity of all the observed lines. One important reason for studying the laser induced fluorescence of $^{6}LI_{2}$ Is to find transitions that might lase when optically pumped. This molecule (like $^{7}Li_{2}$) is a promising candidate for efficient, scalable and line tunable lasers in the visible and near infrared. Another reason for studying laser induced fluorescence of $^{6}LI_{2}$ is to obtain sufficient information about this molecule before studying fluorescence spectra of $^{6}Li ^{7}Li$ to search for direct excitation of nominally gerade states. We are also in the process of carrying out the laser induced fluorescence using UV lines of the argon ion $laser.^{*}$ Supported by the National Science Foundation and the National Aeronautics and Space Administration. $^{1}$ R. Velasco, Ch. Ottinger and R. N. Zare, J. Chen. Phys. 51, 5522 (1969).$^{2}$ A. J. Lightman and B. P. Mathur, J Chem, Phys. 69. 2262 (1978).
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