Volume 384, Number 1, MarchII 2002
|Page(s)||364 - 370|
|Section||Catalogs and data|
|Published online||15 March 2002|
Radiative lifetime measurements and oscillator strengths of astrophysical interest in Ho III
Department of Physics, Lund Institute of Technology, PO Box 118, 22100 Lund, Sweden
2 Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium
3 IPNAS, Bât. B15, Université de Liège, Sart Tilman, 4000 Liège, Belgium
Corresponding author: E. Biémont, E.Biemont@ulg.ac.be
Accepted: 14 December 2001
Radiative lifetimes of three long-lived levels belonging to the 4f105d configuration of Ho III have been measured, for the first time, using the time-resolved laser-induced fluorescence technique. A good agreement between the experimental lifetimes and theoretical results obtained within a multiconfigurational pseudo-relativistic Hartree-Fock (HFR) approach including core-polarization (CP) effects is observed provided an adequate scaling factor is applied to the <4fr5d> transition matrix element. From the comparison theory–experiment, it has been possible to assess the reliability of the oscillator strengths of the 4f–5d transitions of astrophysical interest, particularly for the lines depopulating the levels considered in the present work. The present results fill in a gap concerning the f-values of doubly ionized holmium and are needed for a quantitative evaluation of the holmium abundance in some peculiar stars.
Key words: atomic data / atomic processes / stars: chemically peculiar
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.