Abstract
Emission spectra obtained from jet-cooled disulfur monoxide (S 2O) molecules have been interpreted quantitatively by means of a U(2) Lie algebraic theory. Fluorescence accompanying selective excitation of the S 2O C ̃ 1 A′← X ̃ 1 A′ ( π ∗← π) absorption system was dispersed under modest resolution, thereby permitting vibrational assignment of ground-state levels possessing up to 20 quanta of the ν 2 S–S stretching mode. Aside from providing a convenient framework for analysis of recorded energy patterns, the algebraic treatment allows for straightforward calculation of multidimensional Franck–Condon factors and corresponding transition intensities. The emerging picture of S 2O vibrational dynamics suggests that the X ̃ 1 A′ potential surface is substantially more `local' in character than the C ̃ 1 A′ manifold.
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