OBSERVATION OF $\Delta|k-l|-3$ TRANSITIONS IN THE $v_{3}$ BAND OF $H_{3}O^{+}$
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Date
1996
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Ohio State University
Abstract
Although the vibration-rotation spectrum of $H_{3}O^{+}$ has been studied extensively, there has been no experimental information on the value of the C rotational constant because of the absensce of $\Delta|k-l|\neq 0$ forbidden transitions. There is a near degeneracy between the (9,0)$^{+}$ and the (9,3)$^{-}$ ground state rotation-inversion levels, as pointed out by Verhoeve, $et al.^{1}$ Indeed the ground state combination differences of the $v_{3}$ fundamental transitions show a sizable shift of the (9.3)$^{-}$ level as well as the neighboring (7,3)$^{-}$ and (11,3)$^{-}$ levels. We have obtained 11 forbidden $v_{3}$ transitions involving these ground state levels. This enabled us to determine the energy difference between different K levels and the mixing coefficient $\tau_{xxxz}$. An extended analysis of the $v_{3}$ bands is in progress.
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$^{1}$Verhoeve, p., et al. Chem. Phys. Lett. 161, 195, 1989.
Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, The University of Chicago
Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, The University of Chicago