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Lego Figure holding a lego telescope. Photo

Henrik Hartman

Researcher (Leave of Absence)

Lego Figure holding a lego telescope. Photo

Experimentally measured radiative lifetimes and oscillator strengths in neutral vanadium

Author

  • C. E. Holmes
  • J. C. Pickering
  • M. P. Ruffoni
  • R. Blackwell-Whitehead
  • Hampus Nilsson
  • L. Engström
  • H. Hartman
  • H. Lundberg
  • M. T. Belmonte

Summary, in English

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.

Department/s

  • Lund Observatory - Undergoing reorganization
  • Atomic Physics

Publishing year

2016-06-01

Language

English

Publication/Series

The Astrophysical Journal Supplement Series

Volume

224

Issue

2

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • atomic data
  • stars: abundances
  • Sun: abundances

Status

Published

Project

  • Experimental and Observational Atomic Astrophysics

ISBN/ISSN/Other

  • ISSN: 0067-0049