OBSERVATION AND ANALYSIS OF ION-PAIR TRANSITIONS OF $I_{2}$ IN A FREE-JET EXPANSION.
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Date
1991
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The $A^{\prime}$ state of $I_{2}$ was obsereved for the first time in a free-jet expansion, where it was prepared by ArF laser excitation of $I_{2}$/Ar mixtures close to the $nozzle^{1}$. Twenty seven bands in the v"" = 0 progression of the $D^{\prime} - A^{\prime}$ transition were studied by laser excitation spectroscopy, leading to the following improved constants $(cm^{-1})$ for the $A^{\prime} and D^{\prime}$ states: \begin {eqnarray*}B_{0}^{-} = 0.028054, Be^{\prime} = 0.020526, \alpha_{e}^{\prime} = 5.3 \times 10^{-5},\\ \omega_{e}^{\prime} = 103.953, \omega_{e}x_{e}^{\prime} = 0.2097, \omega_{e}y_{e} = 2.687 \times 10^{-4}\end {eqnarray*}. Many bands of the $\beta - A$ transition have also been observed. These originate from A, $v^{-} = 0$, and terminate on levels with $25\leq v^{\prime}\leq68$ of the $\beta$ state. Full analyses of both band systems will be presented.
Description
Phys. Lett. 176, 373 (1991).""
Author Institution: Department of Chemistry, Vanderbuilt University; Department of Chemistry, Emory University
Author Institution: Department of Chemistry, Vanderbuilt University; Department of Chemistry, Emory University