Radiative parameters of Nb i excited states

Summary, in English

Radiative lifetimes of 17 excited levels of Nb i, in the energy range 27 400-47 700 cm-1 (5p y 6D degrees(9/2), 5p x 6D degrees(7/2), 5p w 4G degrees(7/2,9/2,11/2), 5s5p v 4D degrees(1/2,3/2,5/2,7/2), 5s6p n 4D degrees(1/2,3/2,5/2,7/2), 5s6p o 4F degrees(3/2,5/2,7/2,9/2)), 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.

• Författare: G. Malcheva; Hampus Nilsson; Lars Engström; Hans Lundberg; E. Biemont; P. Palmeri; P. Quinet; K. Blagoev
• Avdelning/ar: Astronomi - Har omorganiserats; Atomfysik
• Publiceringsår: 2011
• Språk: Engelska
• Sidor: 1823-1827
• Publikation/Tidskrift/Serie: Monthly Notices of the Royal Astronomical Society
• Volym: 412
• Issue: 3
• Länkar: http://dx.doi.org/10.1111/j.1365-2966.2010.18020.x
• Dokumenttyp: Artikel i tidskrift
• Förlag: Oxford University Press
• Ämne: Atom and Molecular Physics and Optics; Astronomy, Astrophysics and Cosmology
• Nyckelord: atomic data; atomic processes; methods: laboratory
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1365-2966