Lifetime measurements using two-step laser excitation for high-lying even-parity levels and improved theoretical oscillator strengths in Y II

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Lifetime measurements using two-step laser excitation for high-lying even-parity levels and improved theoretical oscillator strengths in Y II

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Publication Article, peer reviewed scientific
Title Lifetime measurements using two-step laser excitation for high-lying even-parity levels and improved theoretical oscillator strengths in Y II
Author Palmeri, Patrick ; Quinet, Pascal ; Lundberg, Hans ; Engström, Lars ; Nilsson, Hampus ; Hartman, Henrik
Date 2017
English abstract
We report new time-resolved laser-induced fluorescence lifetime measurements for 22 highly excited even-parity levels in singly ionized yttrium (Y II). To populate these levels belonging to the configurations 4d6s, 5s6s 4d5d, 5p2, 4d7s and 4d6d, a two-step laser excitation technique was used. Our previous pseudo-relativistic Hartree–Fock model (Bi´emont et al. 2011) was improved by extending the configuration interaction up to n = 10 to reproduce the new experimental lifetimes. A set of semi-empirical oscillator strengths extended to transitions falling in the spectral range λλ194–3995 nm, depopulating these 22 even-parity levels in Y II, is presented and compared to the values found in the Kurucz’s data base (Kurucz 2011).
DOI https://doi.org/10.1093/mnras/stx1619 (link to publisher's fulltext.)
Link https://doi.org/10.1093/mnras/stx1619 .Icon
Publisher Oxford University Press
Host/Issue Monthly Notices of the Royal Astronomical Society;1
Volume 471
ISSN 0035-8711
Pages 532-540
Language eng (iso)
Subject atomic data
atomic processes
methods: numerical
methods: experimental
Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/24058 Permalink to this page
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