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2009-08-28 - Article/Dans un journal avec peer-review - Anglais - 12 page(s)

Palmeri Patrick , Quinet Pascal , Fivet Vanessa, Biémont Emile , Cowley C.R., Engström L., Lundberg H., Hartman H., Nilsson H., "Lifetime measurements in Ru II and calculated oscillator strengths in Ru II and Ru III" in Journal of Physics : B Atomic Molecular & Optical Physics, 42, 16, 1-12, 165005

  • Edition : Institute of Physics, Bristol (United Kingdom)
  • Codes CREF : Physique atomique et moléculaire (DI1220), Mécanique quantique classique et relativiste (DI1211)
  • Unités de recherche UMONS : Astrophysique et spectroscopie (S804)
Texte intégral :

Abstract(s) :

(Anglais) A new set of theoretical f -values is reported for 178 Ru II transitions of astrophysical interest, involving energy levels below 58 000 cm-1. The theoretical model, including core-polarization effects, has been tested by comparing theoretical lifetimes with new measurements performed by time-resolved laser-induced fluorescence spectroscopy for 23 4d6(5D)5p odd levels of Ru II and by comparing theoretical and experimental Landé g-factors. The first set of transition probabilities is proposed for 25 strong lines depopulating the 4d55p 5,7P° terms of Ru III. The new results will allow quantitative investigations of stellar spectra and allow the astrophysicists to refine the ruthenium abundance in stars.

Identifiants :
  • DOI : 10.1088/0953-4075/42/16/165005