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

Journal article
Authors H. Nilsson
Jonas Andersson
L. Engstrom
H. Lundberg
H. Hartman
Published in Astronomy & Astrophysics
Volume 622
ISSN 1432-0746
Publication year 2019
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1051/0004-6361/201834...
Keywords atomic data, line: identification, methods: laboratory: atomic, techniques: spectroscopic, oscillator-strengths, lifetime measurements, Astronomy & Astrophysics
Subject categories Physical Sciences

Abstract

Aims. We aim to measure lifetimes of levels belonging to the 3d(3)(F-4)4d subconfiguration in V 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.

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