THE ELECTRONIC SPECTRUM OF MANGANESE MONOHYDRIDE
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Date
1988
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Ohio State University
Abstract
The electronic spectrum of MnH has been examined in thermal emission from Mn/H2 mixtures in a King furnace using both photographic and Fourier transform techniques. Two systems have been studied at high resolution: an infrared system centered near 847 nm and a visible system in the blue near 480 nm. Rotational analysis of the 847 nm system shows it to be due to $a ^{s}\Sigma - ^{s}\Sigma$ transition. The 480 nm spectrum, which is extremely complex with dense rotational structure, arises from $a ^{s}\Pi - ^{s}\Sigma$ transition. The two systems have the same lower electronic state. While the MnH spectra appear relatively free of local perturbations the corresponding MnD spectra show a number of branch irregularities. Branches in both systems are broadened to differing extents through nuclear hyperfine coupling.
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Author Institution: Department of Chemistry, University of Victoria; Institute of Physics, University of Stockholm; Department of Physics, University College Dublin