Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance

Details Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...273..707b&link_type=abstract

Astronomy and Astrophysics, Vol. 273, p. 707 (1993)

Astronomy and Astrophysics

Astrophysics

63

Atomic Data, Sun: Abundances

Scientific paper

Transition probabilities of 100 Ti-II emission lines, originating from 7 different atomic levels, have been determined by combining branching fractions with radiative lifetimes. The branching fractions were measured using Fourier transform spectroscopy on a hollow cathode. The radiative lifetimes of these 7 - and 35 additional - levels were measured using time resolved laser-induced fluorescence on a slow Ti ion beam.
The transition probabilities of 21 very weak lines have been used to derive a solar titanium abundance of αTi = log(NTi/NH) + 12=5.04±0.04 dex, which is insensitive to the solar model. This value is in disagreement with the meteoritic titanium abundance (4.93±0.02).

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