15min:
THERMOCHEMICAL INFORMATION AND ROTATIONAL STRUCTURE IN THE AUTOIONIZATION SPECTRA OF HCO..

ERIC J. ZÜCKERMAN, ROBERT J. FOLTYNOWICZ, MICHAEL KONOPKA, HARTMUT G. HEDDERICH AND EDWARD R. GRANT, Department of Chemistry, Purdue University, West Lafayette, IN 47907-1393; SHIH-HUI JEN AND I-CHIA CHEN, Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, 30043, Republic of China.

Rotationally resolved autoionization spectra of the HCO radical in high-Rydberg states built on the (010) core vibrational state have been obtained from selected rovibrational levels of the 3ppi\, 2Pi (010) Sigma+ Rydberg state. Simulations of the spectra lead to reliable ionization potentials for detailed rovibrational states of HCO+. Data for bending overtones supply information on anharmonic terms in the cation vibrational potential. Rotational structure associated with autoionizing states is analyzed.