Branching fractions and A values in singly ionized tantalum (Ta II)
Abstract
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.
- Publication:
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Astronomy and Astrophysics
- Pub Date:
- January 2009
- DOI:
- Bibcode:
- 2009A&A...493..711Q
- Keywords:
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- atomic processes;
- line: identification