FLUORESCENCE OF. $^{6}LiH$ INDUCED BY AN ULTRAVIOLET ARGON ION $LASER^{*}$
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Date
1981
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Ohio State University
Abstract
Very little is known about the laser fluorescence of the $^{6}LiH$ molecule. The only fluorescence previously observed was by $Ennen^{1}$ who excited this molecule with an argon ion (4579 {\AA}) laser and erroneously listed the lines as due to $^{6}LiH$. We have excited this molecule with UV lines of an argon ion laser showing reasonably strong fluorescence for the laser wavelength 3336 {\AA} and weak fluorescence for 3511/3514 {\AA} excitation. The spectra excited by 3336 {\AA} were recorded and analysed. The exciting line is assigned to be R(9) of the 12-0 band pf the $A^{1}\Sigma^{+} -X^{1}\Sigma ^{+}$ system of $^{6}LiH$. For this first time we have observed up to the $v’‘ = 21$ level in the ground state, which is the last bound level for $J’‘ = 9$ and quasibound for $J’‘ = 11$. Transition probabilities have been calculated and compared with the observed intensities. Further work to an improved potential curve for the $X^{1}\Sigma^{+}$ state in progress.
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$^{*}$ Supported by the National aeronautics and Space Administration and the National Science Foundation. $^{1}$G. Ennen, Ph.D. thesis, G\""{o}ttingen (1976).
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