C. TAO, C. MUKARAKATE AND S. A. REID, Department of Chemistry, Marquette University, Milwaukee, WI 53233; T. W. SCHMIDT AND S. H. KABLE, School of Chemistry, University of Sydney, NSW 2006, Australia.
We have recently observed transitions to the predissociated, quasilinear B1A' state of CHF using a fluorescence dip detected optical-optical double resonance technique. By exciting selected rovibronic states in intermediate A1A'' levels belonging to the progressions 20n, 10120n, and 20n301, a variety of B1A' state levels were observed, extending to an energy of 7000 cm-1 above the B1A' state origin. In this talk, we will focus on the spectroscopy of the B1A' state and the excited state barrier to linearity. Experimental data will be compared with ab initio predictions.