SUB-MILLIMETER/TERAHERTZ SPECTROSCOPY OF FeH AND FeD (X$^{4}\Delta _{i}$)
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Date
2012
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Ohio State University
Abstract
Direct measurements of the lowest pure rotational transitions of the $\Omega$ = 7/2, 5/2, and 3/2 ladders of FeD and of the $\Omega$ = 1/2 ladder of FeH in the $^{4}\Delta_{i}$ ground electronic states have been conducted using millimeter/sub-millimeter direct absorption techniques in the frequency range 530-810 GHz. Both species were created in an AC discharge from the reaction of Fe(CO)$_{5}$ with H$_{2}$ or D$_{2}$. In several of these transitions lambda-doubling and proton/deuterium hyperfine structure have been resolved. These data improve on the zero field frequencies predicted from previous LMR data by several MHz.$^{a}$ Accurate frequencies are crucial for sub-millimeter searches for FeH toward the interstellar medium. Searches for additional transitions are in progress. \\ \\ $^{a}$ J.M. Brown, H. Korsgen, S.P. Beaton, \& K.M. Evenson, J. Chem. Phys. 124, 234309 (2006)
Description
Author Institution: Department of Chemistry and Biochemistry, Department of Astronomy, and Steward Observatory, University of Arizona, Tucson, Arizona 85721