THE OPTICAL SPECTRUM OF ATOMIC CLUSTERS Si$_3$ and S$_3$
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Date
2010
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Publisher
Ohio State University
Abstract
The optical spectra of the atomic clusters Si$_3$ and S$_3$ will be discussed in detail. The jet-cooled 2-colour resonant-2-photon ionisation spectrum of Si$_3$ has now been detected for the first time in the 530\,nm region. For Si$_3$ a progression in the excited state bending and stretching modes are seen built onto the origin. Lower state frequencies derived from sequence band structure agree with those previously measured for the D$_{3h}$ low lying electronic state. For thiozone additional experiments were undertaken and progressions in the excited state bending and stretching modes are seen with frequencies of 350\,cm$^{-1}$ and 420\,cm$^{-1}$ built onto the origin band at 23053.5\,cm$^{-1}$ respectively. In this talk our results are compared to theoretical results on both the C$_{2v}$ and D$_{3h}$ forms.
Description
Author Institution: Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, and School of; Engineering \& Applied Sciences, Harvard University, 29 Oxford St.; Cambridge, MA 02138; Department of Chemistry \& Biochemistry, The University of Texas at Austin, 1 University Station; A5300 Austin, TX 78712