THRESHOLD ION-PAIR PRODUCTION SPECTROSCOPY (TIPPS) of $H_{2}S$
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Date
2000
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Threshold Ion-Pair Production Spectroscopy (TIPPS) of $H_{2}S$ will be presented. Hydrogen sulfide molecules were excited into weakly bound $H^{-} - HS^{+}$ Rydberg-like state using XUV photons and then dissociated with pulsed electric fields. The TIPP spectrum was recorded by detecting the negative ion $H^{-}$. The spectrum agrees quite well with a simulated spectrum. From the TIPP spectrum the H-SH bond dissociation energy could be determined within several wavenumbers. We found that the positive ion product, $HS^{+}$, could be highly rotationally, or even vibrationally excited. The dynamics of the photodissociation process of $H_{2}S \rightarrow H^{-} + HS^{+}$ will be discussed and compared to the process of $H_{2}S \rightarrow H^{+} + HS^{-}$.
Description
Author Institution: Department of Chemistry, University of Waterloo