HYPERFINE STUCTURE MEASUREMENTS IN THE $A^{3}\Pi(1) \leftarrow X^{1}\sum^{+}$ ELECTRONIC TRANSITION OF $I^{35}$Cl NEAR THE DISSOCIATION $LIMIT.^{1}$
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Date
1991
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Publisher
Ohio State University
Abstract
Vibrational levels near the dissociation limit of the $A^{3}\Pi $(1) electronic state of $I^{35}$ Cl have been studied using fluorescence excitation techniques. By using a single mode ultra high resolution ring laser and a well collimated molecular beam, the hyperfine structure due to both the Iodine (I = 5/2) and Chlorine (I = 3/2) nuclei have been resolved. Calculation of the high energy vibrational wavefunctions, using a R.K.R level of theory, indicates that a large portion of a vibrational period is spent by the two nuclei at internuclear separations greater than their total van der Waals radii. This observation will be the basis for a discussion of the observed trends in the molecular electronic quadrupole ($eQq_{0}$ and $eQq_{2}$) and magnetic hyperfine (a) constants in terms of the atomic orientations as a function of internuclear separation. $^{1}$Work supported by NSF.
Description
Author Institution: Department of Chemistry, University of Pittsburgh; Thompson Electronics, University of Pittsburgh; Department of Chemistry, University of Bristol