PREDISSOCIATION STUDIES IN RYDBERG STATES OF CALCIUM MONOCHLORIDE
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Date
1999
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Recent experimental results from our continuing study of the Rydberg states of Calcium Monochloride will be $summarized.^{a,b}$ At last year's Symposium, results were presented with regard to the predissociation of $^{2}\Sigma^{+}$ states in the $n^{\ast} = 3-7 region.^{c}$ The potential energy curve of the $^{2}\Sigma^{+}$ repulsive state responsible for these predissociations was quantitatively determined by direct observations of line broadening in the $n^{\ast}=6-7$ region via REMPI and ion-dip techniques and qualitatively determined in the $n^{\ast}=3-5$ region by OODR fluorescence detection. Unanswered questions propelled further REMPI studies of the $low-n^{\ast}$ region $(n^{\ast}=3-5)$, which is expected to be extensively predissociated by $^{2}\Sigma^{+}$ and possibly $^{2}\Pi$ repulsive states. Preliminary results indicate the presence of three unobserved members of two known core-penetrating $^{2}\Sigma^{+}$ Rydberg series $(n^{\ast} = 3.50, 3.77, 4.50)$ as well as the resonant detection of predissociation by TOF measurements measuring the atomic Ca photofragment channel. Further experiments in this $n^{\ast}$ region should determine the potential energy curve of the $^{2}\Pi$ repulsive state as well as several new members of the two known $^{2}\Pi$ Rydberg series.
Description
$^{a}$J. Li, Y. Liu, D.B. Moss, C.M. Gittins, N.A. Harris, and R.W. Field, J. Mol. Spec. 193, 403 (1999). $^{b}$J.O. Clevenger, N.A. Harris, R.W. Field, and J. Li, J. Mol. Spec. 193, 412 (1999). $^{c}$ibid, Presentation TB03, ``53rd Ohio State Symposium on Molecular Spectroscopy'', 1998.
Author Institution: Department of Chemistry, Massachusetts Institute of Technology
Author Institution: Department of Chemistry, Massachusetts Institute of Technology