On the perturbation in the f values of the principal series of Ba I
- 28 May 1988
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 21 (10) , L241-L245
- https://doi.org/10.1088/0953-4075/21/10/002
Abstract
The authors report new measurements of f values for the principal series of Ba I for n values extending up to n=42. The measurements, performed by Faraday rotation spectroscopy using a tunable dye laser, are believed to extend to higher values of n than any previous quantitative determinations. They cover a prominent series perturbation due to the 5d8p 1P1 doubly excited autoionising line, and a comparison is made between the authors' data and the predictions of multichannel quantum defect theory extrapolated from lower values of n.Keywords
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