15min:
LIFETIME ANALYSIS OF A DISSOCIATIVE STATE: OPTICAL-OPTICAL DOUBLE RESONANCE SPECTROSCOPY OF THE V=3 LEVEL OF THE A1P STATE OF BH.

A. GILKISON, J. CLARK, C. R. VITERI AND E. R. GRANT, Purdue University, Department of Chemistry, West Lafayette, IN USA..

The A 1 Pi state of BH is characterized by its barrier to dissociation. We have observed new structure in the v=3, J=4-7 region near the top of the barrier by means of constant energy scans over intermediate states in double resonant transitions locked on single B 1 Sigma - X 1 Sigma transitions. Linewidths provide new information on the barrier height and tunneling lifetimes.