Advanced

Experimentally measured radiative lifetimes and oscillator strengths in neutral vanadium

Holmes, C. E.; Pickering, J. C.; Ruffoni, M. P.; Blackwell-Whitehead, R. LU ; Nilsson, Hampus LU ; Engström, L. LU ; Hartman, H. LU ; Lundberg, H. LU and Belmonte, M. T. (2016) In The Astrophysical Journal Supplement Series 224(2).
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 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... (More)

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 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. 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.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic data, stars: abundances, Sun: abundances
in
The Astrophysical Journal Supplement Series
volume
224
issue
2
publisher
University of Chicago Press
external identifiers
  • Scopus:84977492986
  • WOS:000381013200022
ISSN
0067-0049
DOI
10.3847/0067-0049/224/2/35
language
English
LU publication?
yes
id
c33a3a90-5857-432d-b8d3-6d1d24c4f555
date added to LUP
2016-07-25 14:11:52
date last changed
2017-01-01 08:31:05
@article{c33a3a90-5857-432d-b8d3-6d1d24c4f555,
  abstract     = {<p>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<sup>-1</sup> and 37,518 cm<sup>-1</sup> and oscillator strengths for 208 lines between 3040 and 20000 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. 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<sup>-1</sup>.</p>},
  articleno    = {35},
  author       = {Holmes, C. E. and Pickering, J. C. and Ruffoni, M. P. and Blackwell-Whitehead, R. and Nilsson, Hampus and Engström, L. and Hartman, H. and Lundberg, H. and Belmonte, M. T.},
  issn         = {0067-0049},
  keyword      = {atomic data,stars: abundances,Sun: abundances},
  language     = {eng},
  month        = {06},
  number       = {2},
  publisher    = {University of Chicago Press},
  series       = {The Astrophysical Journal Supplement Series},
  title        = {Experimentally measured radiative lifetimes and oscillator strengths in neutral vanadium},
  url          = {http://dx.doi.org/10.3847/0067-0049/224/2/35},
  volume       = {224},
  year         = {2016},
}