			15min:

RYDBERG STATES CONVERGING TO HIGHER VIBRATIONALLY EXCITED STATES OF HCO⁺..

ROBERT J. FOLTYNOWICZ, WOLFGANG RUPP, HARTMUT G. HEDDERICH AND EDWARD R. GRANT, Department of Chemistry, Purdue University, West Lafayette, IN 47907-1393.

Single rotational levels photoselected in the strongest bent B\,²A' state of HCO serve as intermediate states in double resonance transitions to Rydberg states built on higher vibrationally excited levels of the linear HCO⁺ core. Frank-Condon factors for the bent-to-linear transitions discriminate against resonances converging to lower lying vibrational states. Widths and intensities of multiple quantum vibrational autoionization resonances are affected by the level of core excitation.