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Atoms 2017, 5(1), 5; doi:10.3390/atoms5010005

Hyperfine Structure and Isotope Shifts in Dy II

Department of Physics & Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
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Academic Editor: Joseph Reader
Received: 8 December 2016 / Revised: 10 January 2017 / Accepted: 13 January 2017 / Published: 20 January 2017
(This article belongs to the Special Issue Spectra of Ionized Atoms: From Laboratory to Space)
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Abstract

Using fast-ion-beam laser-fluorescence spectroscopy (FIBLAS), we have measured the hyperfine structure (hfs) of 14 levels and an additional four transitions in Dy II and the isotope shifts (IS) of 12 transitions in the wavelength range of 422–460 nm. These are the first precision measurements of this kind in Dy II. Along with hfs and IS, new undocumented transitions were discovered within 3 GHz of the targeted transitions. These atomic data are essential for astrophysical studies of chemical abundances, allowing correction for saturation and the effects of blended lines. Lanthanide abundances are important in diffusion modeling of stellar interiors, and in the mechanisms and history of nucleosynthesis in the universe. Hfs and IS also play an important role in the classification of energy levels, and provide a benchmark for theoretical atomic structure calculations. View Full-Text
Keywords: laser spectroscopy; ionized atoms; hyperfine structure; isotope shifts laser spectroscopy; ionized atoms; hyperfine structure; isotope shifts
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Del Papa, D.F.; Holt, R.A.; Rosner, S.D. Hyperfine Structure and Isotope Shifts in Dy II. Atoms 2017, 5, 5.

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