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Transition probabilities and lifetimes in neutral and singly ionized osmium and the Solar osmium abundance

På svenska

Author

  • P Quinet
  • P Palmeri
  • E Biemont
  • A Jorissen
  • S Van Eck
  • Sune Svanberg
  • Huailiang Xu
  • B Plez

Summary, in English

Radiative lifetime measurements have been performed, with a time-resolved laser-induced fluorescence technique, for 12 levels of Os I and for 9 levels of Os II. For 9 levels of Os I and 4 levels of Os II, there were no previous experimental data available. From a comparison with new theoretical calculations, taking configuration interactions and core-polarization effects into account, it has been possible to deduce oscillator strengths for 129 transitions of Os I and 137 transitions of Os II of astrophysical interest appearing in the wavelength range 180.0-870.0 nm. These results have allowed us to revise the abundance of osmium in the solar photosphere (log epsilon(Os) = 1.25 +/- 0.11). The newly derived oscillator strengths have been applied as well to derive the osmium abundance in the carbon-rich metal-poor star HD 187861.

Department/s

Publishing year

2006

Language

English

Pages

93-1207

Publication/Series

Astronomy & Astrophysics

Volume

448

Issue

3

Document type

Journal article

Publisher

EDP Sciences

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • Sun : abundances
  • atomic data
  • atomic processes

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-6361