Experimental transition probabilities for 4p - 4d spectral lines in V II

H. Nilsson, J. Andersson, L. Engström, H. Lundberg, H. Hartman

Research output: Contribution to journalArticlepeer-review


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 languageEnglish
Article number201834795
JournalAstronomy and Astrophysics
Publication statusPublished - 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


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