LASER SPECTROSCOPY OF THE DOUBLE MINIMUM POTENTIAL IN THE $E^{1}\Sigma g^{+}$ STATE OF $Li_{2}$
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Date
1984
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Ohio State University
Abstract
Previous work in this $laboratory^{1}$ characterized the $E^{1}\Sigma g^{+}$ state of $Li_{2} (v=0-12)$ and gave an indication of the possibility of the existence of a double minimum potential in this state. A shallow outer minimum near $v=12$ was also predicted by an ab initio $calculation.^{2}$ The present work extends the measurements through $v=18$. Several low J levels from $v=13$ and 14 exist in the inner minimum portion of the potential with the remaining levels above the barrier showing a sudden dramatic increase in internuclear distance consistent with the existence of a double minimum. At the present time no transitions have been assigned in the outer minimum. However, the pulsed OODR spectra are uncharacteristically complex in this energy region.
Description
$^{1}$ R.A. Bernheim, L.P. Gold, P. 3. Kelly, T. Tipton, and D.K. Veirs, J. Chem. Phys. 76, 57 (1982). $^{2}$ D.D. Konowalow and J.L. Fish, J. Chem. Phys. 76, 1571 (1982).
Author Institution: Department of Chemistry, The Pennsylvania State University
Author Institution: Department of Chemistry, The Pennsylvania State University