STATE SELECTIVE PHOTOFRAGMENTATION OF ICl-Ne VAN DER WAALS COMPLEXES
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Date
1987
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Ohio State University
Abstract
The vibrational predissociation dynamics of ICI-Ne van der Waals complexes has been investigated for a series of vibrational levels in the $A(^{3}\Pi_{1})$ state manifold. Visible laser excitation prepares the complexes in selected rovibrational levels in the A state. Coupling of the vibrational excitation, initially localized in the ICI bond, to the weak van der Waals bond results in predissociation of the complex. Fragmentation proceeds with the loss of one or two quanta of ICI vibrational energy. The nascent rotational/vibrational distribution is probed by excitation of the ICI A state photofragments to an ion pair state. The product state distribution reflects the dominant features of the reaction pathway and provides an important key to understanding the reaction mechanism. By initially populating different vibrational levels in the complex, the energetics and lifetime of the predissociation can be selectively altered. Detailed product state distributions will be presented for dissociation of ICI-Ne from A state vibrational levels with predissociation lifetimes ranging from $nanoseconds^{1}$ to a few picoseconds. Analysis of results will be discussed in the context of statistical theories of photodissociation and inelastic scattering theories.
Description
$^{1}$ J.C. Drobits, J.M. Skene and M.I. Lester, J. Chem. Phys. 84, 2896 (1986).
Author Institution: Department of Chemistry, University of Pennsylvania, Philadelphia
Author Institution: Department of Chemistry, University of Pennsylvania, Philadelphia