Radiative lifetimes for Nb II and the problem of the solar abundance of niobium

Details Radiative lifetimes for Nb II and the problem of the solar abundance of niobium Radiative lifetimes for Nb II and the problem of the solar abundance of niobium

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143..447h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 2, Feb. 1985, p. 447-450.

Astronomy and Astrophysics

Astrophysics

21

Abundance, Niobium, Photosphere, Radiative Lifetime, Solar Atmosphere, Fluorescence, Hyperfine Structure, Laser Induced Fluorescence, Metal Ions, Metal Vapors, Optical Transition, Transition Probabilities

Scientific paper

The radiative lifetimes of 27 levels in Nb II have been measured by the method of laser-induced fluorescence from sputtered metal vapor. These results have been combined with recent solar data to determine the solar abundance of niobium. The result, A(Nb) = 1.42 + or - 0.06, which is in good agreement with observations of meteorites, is by a factor of 5 lower than that recently derived from Nb I lines by Kwiatkowski et al. (1982). Some possible explanations of the discrepancy are given.

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