ISOTOPIC SELECTIVITY IN THE ELECTRONIC PREDISSOCIATION DYNAMICS OF $CN-Ar_{n}$ CLUSTERS
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Date
1997
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Ohio State University
Abstract
$CN -Ar_{n}$ clusters with an average size of n=100, were prepared in a supersonic expansion. Electronic excitation of the clusters to $CN(B^{2}\Sigma^{+})-Ar_{r}$ was followed by electronic predissociation. In a previous low-resolution $study^{g}$, it was proposed that predissociation involved the ejection of free $CN(A^{2}\Pi)$ from the surface of the cluster. In the present work, OODR techniques were used to demonstrate that free $CN(A^{2}\Pi)$ was produced. Interestingly, although a natural isotopic mixture of CN was used $(1%{^{13}}CN)$, similar quantities of $^{12}CN$ fragments were detected. The product state distributions resulting from predissociation, and the isotopic selectivity of the dynamics will be discussed.
Description
$^{g}$H.-S. Lin, M. G. Erickson, Y. Lin, W.G. Lawrence, M.C. Heaven, Chem. Phys. 189, 235(1994)
Author Institution: Department of Chemistry, Emory University
Author Institution: Department of Chemistry, Emory University