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The ground-state infrared spectrum of four isotopic forms of barium monohydride (BaH)

โœ Scribed by Ulrich Magg; Helmut Birk; Harold Jones

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
361 KB
Volume
149
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The infrared spectrum of four isotopic forms of gas-phase barium monohydrides, t3*BaH (7 1.7%), 13'BaH (11.3%), t3"BaH (7.8%), and '35BaH (6.4%) in natural abundance in their ground electronic state (21* ) have been observed using a diode laser spectrometer. A number of transitions of "4BaH (2.4%) were also observed, but insufftcient data were accumulated to allow a good analysis. As a result of coupling between the unpaired electron and the overall rotation each individual transition appears as a doublet. The wavenumber of seven transitions of the II= 1 t-0, six of the v=2t 1 band and eight of the v= 3t2 band have been measured to f 0.001 cm-'. The spin-rotational splitting (y splitting), which is of the order of 0.2 cm-', was easily resolved and higher-order correction terms determined.

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