Experimentally Measured Radiative Lifetimes and Oscillator Strengths in Neutral Vanadium

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Experimentally Measured Radiative Lifetimes and Oscillator Strengths in Neutral Vanadium

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Publication Article, peer reviewed scientific
Title Experimentally Measured Radiative Lifetimes and Oscillator Strengths in Neutral Vanadium
Author Holmes, Charlotte ; Pickering, Juliet ; Ruffoni, Matthew ; Blackwell-Whitehead, Richard ; Nilsson, Hampus ; Engström, Lars ; Hartman, Henrik ; Lundberg, Hans ; Belmonte, M
Date 2016
English abstract
We report a new study of the V i atom using a combination of time-resolved laser-induced fluorescence and Fourier transform spectroscopy that contains newly measured radiative lifetimes for 25 levels between 24,648 cm-1 and 37,518 cm-1 and oscillator strengths for 208 lines between 3040 and 20000 Å from 39 upper energy levels. Thirteen of these oscillator strengths have not been reported previously. This work was conducted independently of the recent studies of neutral vanadium lifetimes and oscillator strengths carried out by Den Hartog et al. and Lawler et al., and thus serves as a means to verify those measurements. Where our data overlap with their data, we generally find extremely good agreement in both level lifetimes and oscillator strengths. However, we also find evidence that Lawler et al. have systematically underestimated oscillator strengths for lines in the region of 9000 ± 100 Å. We suggest a correction of 0.18 ± 0.03 dex for these values to bring them into agreement with our results and those of Whaling et al. We also report new measurements of hyperfine structure splitting factors for three odd levels of V i lying between 24,700 and 28,400 cm-1.
DOI https://doi.org/10.3847/0067-0049/224/2/35 (link to publisher's fulltext.)
Publisher IOP
Host/Issue The Astrophysical Journal Supplement Series;2
Volume 224
ISSN 0067-0049
Pages 35
Language eng (iso)
Subject atomic data
stars: abundances
Sun: abundances
Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/21864 Permalink to this page
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