EXPERIMENTALLY MEASURED RADIATIVE LIFETIMES AND OSCILLATOR STRENGTHS IN NEUTRAL VANADIUM
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Published version
Author(s)
Type
Journal Article
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.
Date Issued
2016-06-14
Date Acceptance
2016-03-24
Citation
Astrophysical Journal Supplement Series, 2016, 224 (2)
ISSN
1538-4365
Publisher
American Astronomical Society
Journal / Book Title
Astrophysical Journal Supplement Series
Volume
224
Issue
2
Copyright Statement
© 2016. The American Astronomical Society. All rights reserved.
Sponsor
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Grant Number
ST/I001034/1
ST/K001051/1
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
atomic data
stars: abundances
Sun: abundances
V I
HYPERFINE-STRUCTURE
TRANSITION-PROBABILITIES
VACUUM-ULTRAVIOLET
FE I
ABUNDANCE
SPECTROMETER
SPECTRUM
STARS
LINES
Publication Status
Published
Article Number
35