Abstract
Aims. We aim to measure lifetimes of levels belonging to the 3d 3 ( 4 F)4d subconfiguration in Va II, and derive absolute transition probabilities by combining the lifetimes with experimental branching fractions. Methods. The lifetimes were measured using time-resolved laser-induced fluorescence in a two-photon excitation scheme. The branching fractions were measured in intensity calibrated spectra from a hollow cathode discharge lamp, recorded with a Fourier transform spectrometer. Results. We report lifetimes for 13 levels at an energy around 73 000 cm -1 . Absolute transition probabilities of 78 lines are derived by combining the lifetimes and branching fractions. The experimental values are compared with theoretical data from the literature.
Original language | English |
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Article number | 201834795 |
Journal | Astronomy and Astrophysics |
Volume | 622 |
DOIs | |
Publication status | Published - 2019 Feb 12 |
Subject classification (UKÄ)
- Astronomy, Astrophysics and Cosmology
- Atom and Molecular Physics and Optics
Free keywords
- Atomic data
- Line: identification
- Methods: laboratory: atomic
- Techniques: spectroscopic