15min:

GALINA KERENSKAYA, AMY BURROUGHS, MICHAEL C. HEAVEN, Department of Chemistry, Emory University, Atlanta, GA 30322.

The spectroscopy and dynamics of I₂-Ne have been re-examined using OODR and fluorescence depletion techniques. Action spectra for I₂(B, )-Ne, detected by monitoring the I₂(B, -1) predissociation fragments, show that the =-1 predissociation channel is suppressed for levels above =33, and closed for >36. From these data we obtained a revised estimate for the dissociation energy for I₂(B)-Ne of D₀=57.5 cm^-1.

Action spectra for I₂(B, =34)-Ne, detected by monitoring I₂(B, =33) fragments, revealed a progression of nine intermolecular vibrational levels that had not been observed previously. These levels have been assigned to T-shaped or line ar geometries of I₂(B, =34)-Ne. Assignments were based on characteristic vibrational distributions exhibited by the I₂(B, - ) predissociation fragments. Fluorescence depletion measurements show that all of the bands in the action spectrum originate from a common ground state level. Furthermore, the one atom cage effect fluorescence from I₂(B)-Ne can be depleted by transitions from the zero-point level of I₂(X)-Ne. These observations show that the ground state wa vefunction is delocalized, sampling both the T-shaped and linear configurations of the complex.