Volume 493, Number 2, January II 2009
|Page(s)||711 - 719|
|Section||Atomic, molecular, and nuclear data|
|Published online||20 November 2008|
Branching fractions and A values in singly ionized tantalum (Ta II)
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
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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