| Issue |
A&A
Volume 493, Number 2, January II 2009
|
|
|---|---|---|
| Page(s) | 711 - 719 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361:200811035 | |
| Published online | 20 November 2008 | |
Branching fractions and A values in singly ionized tantalum (Ta II)
1
Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium e-mail: E.Biemont@ulg.ac.be
2
IPNAS, Université de Liège, Sart Tilman, 4000 Liège, Belgium
3
Department of Physics, Lund Institute of Technology, PO Box 118, 221 00 Lund, Sweden
4
Lund Observatory, Lund University, PO Box 43, 221 00 Lund, Sweden
Received:
25
September
2008
Accepted:
23
October
2008
Aims. We report on the theoretical and experimental lifetimes of Ta II, and calculated branching fractions for selected transitions.
Methods. The theoretical data are obtained by means of a relativistic Hartree-Fock method with detailed attention to correlation effects. The experimental lifetimes are measured with the time-resolved, laser-induced, fluorescence technique.
Results. The calculated results are in good agreement with both previously known and new experimental lifetimes. New transition probabilities have been deduced for a set of Ta II transitions of astrophysical interest.
Key words: atomic processes / line: identification
© ESO, 2009
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