ZEEMAN STUDIES OF MICROWAVE-OPTICAL DOUBLE RESONANCE SIGNALS IN THE $\tilde{A}^{1}A_{2}-\tilde{X}^{1}A_{1}$ SYSTEM OF THIOFORMALDEHYDE
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Date
1988
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Ohio State University
Abstract
Zeeman studies have been carried out at fields between 1 and 7 kG on some previously recorded microwave-optical double resonance signals of thioformaldehyde. The microwave transitions originate in the $J_{3}$ rotational levels of the $4^{1} \tilde{A}^{1}A_{2}$ excited state and terminate in highly exited rovibronic levels of the X 1A1 ground state. By observation in parallel $(\Delta M_{j} = O)$ and perpendicular $(\Delta M_{j} = \pm 1)$ polarizations, rotational g-factors for the two combining levels are determined. The interpretation of the results is facilitated by carrying out the measurements with both parallel and perpendicular polarizations of the microwave and optical fields. The effective g-factors for the highly excited levels of the $\tilde{X}^{1}A_{1}$ ground state support the earlier proposition that Ka is not a good quantum number for these levels.
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Author Institution: Abteilung Chemische Physik, Universitat Ulm; Department of Physics and Astronomy, University of Alabama; Herzberg Institute of Astrophysics, National Research Council of Canada