Photoionization and photoelectron spectroscopy of Rydberg states of diazomethane

PHYS 402

Igor Fedorov,, Lukasz Koziol,, Jessica A. Parr,, Guosheng Li,, Anna I. Krylov,, and Hanna Reisler, Department of Chemistry, University of Southern California, Los Angeles, CA 90089-0482
We report an experimental and theoretical study of 3p Rydberg states of diazomethane. Electronic structure calculations show that the 1A2(3py) and 1B1(3pz) are close in origin and can interact vibronically. REMPI spectroscopy and photoelectron velocity map imaging studies of diazomethane cooled in a molecular beam enable an unambiguous assignment of the vibronic spectra belonging to these two electronic states, and elucidates the nature of the vibronic couplings. A third Rydberg state, the 1A1(3px) state, is identified at shorter wavelengths and shows a complex pattern of couplings to more than one level. Rdyberg/Rydberg and Rydberg/valence interactions will be analyzed and discussed.

Poster Session
7:30 PM-10:00 PM, Wednesday, 13 September 2006 Moscone Center -- Hall D, Poster

8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Physical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006