$SiH_{2}$ ELECTRONIC STATES OBSERVED BY 2+1 AND 3+1 RESONANCE ENHANCED MULTIPHOTON IONIZATION SPECTROSCOPY.

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1990

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Ohio State University

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Electronic spectra of $SiH_{3}$ (sllyl radical) have been observed previously1 by $2+1$ Resonance Enhanced Multiphoton Ionization (REMPI) Spectroscopy. Predominantly transitions from the silicon $3p_{1}$ orbital (the HOMO) to np Rydberg states were observed. These two-photon transitions seem to obey the atomic-like selection rule of $\Delta 1 = 0, \pm 2$. which allows transitions to np and nf Rydberg states. New spectra covering the same energy region but using three-photon absorptions have been observed. In these three-photon spectra the transitions to np Rydberg states are practically absent and transitions to ns Rydberg states are strong

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$^{1}$ J. Chem. Phys. 91. 3340 (1989)
Author Institution: Chemical Kinetics Division, National Institute of Standards and Technology

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http://hdl.handle.net/1811/18338

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999