THE SEEDED SUPERSONIC MOLECULAR BEAM/MULTIPHOTON IONIZATION SPECTRUM OF THE $^{1}B_{2u}$ STATE OF BENZENE
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Date
1980
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Ohio State University
Abstract
The multiphoton ionization spectrum of benzene was taken in a seeded supersonic beam in the region of the two-photon resonances with the $A^{1}B_{2u}$ state. Ionization data was obtained beyond the fluorescence limit at $41,300 cm^{-1}$. Due to the almost complete rotational and vibrational cooling in the beam expansion the linewidths of the vibronic levels were able to be monitored directly from the spectra as a function of energy above the electronic origin $T_{00}$ without interference from hot rotational contours. This two-photon data has important implications to the understanding of the channel 3 non-radiative process in benzene. In addition to following the variations in the vibronic level line-widths, new bands were seen $6-8 cm^{-1}$ from the dominant $14^{1}_{0}1^{n}_{0}$ progression. In addition, at the high resolution of this experiment splitting was found in the previously $seen^{1}$ unidentified $Y^{1}_{0}$ bands in benzene-$d_{6}$.
Description
$^{1}$ L. Wunsch, F. Metz, H.J. Neusser, and E.W. Schlag, J. Chem. Phys. 66, 386 (1977).
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