Journal Article

Radiative parameters of Nb <span class="smallCaps">i</span> excited states

G. Malcheva, H. Nilsson, L. Engström, H. Lundberg, É. Biémont, P. Palmeri, P. Quinet and K. Blagoev

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 412, issue 3, pages 1823-1827
Published in print April 2011 | ISSN: 0035-8711
Published online April 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.18020.x
Radiative parameters of Nb i excited states

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Radiative lifetimes of 17 excited levels of Nb i, in the energy range 27 400–47 700 cm−1 (5p y 69/2, 5p x 67/2, 5p w 47/2,9/2,11/2, 5s5p v 41/2,3/2,5/2,7/2, 5s6p n 41/2,3/2,5/2,7/2, 5s6p o 43/2,5/2,7/2,9/2), have been measured. For 15 of these levels, the lifetimes are obtained for the first time. The lifetimes were measured using the time-resolved laser-induced fluorescence technique and the experiments are complemented by a theoretical investigation using a relativistic Hartree–Fock method including core polarization. By combining the experimental lifetimes and the calculated branching fractions, we obtain transition probabilities for the individual de-excitation channels from the investigated levels.

Keywords: atomic data; atomic processes; methods: laboratory

Journal Article.  2223 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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