Reference : Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium a...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance
Bizzarri, A. [> > > >]
Huber, M. C. E. [> > > >]
Noels-Grötsch, Arlette mailto [Université de Liège - ULiège > > Département d'astrophys., géophysique et océanographie (AGO)]
Grevesse, Nicolas mailto [Université de Liège - ULiège > > CSL (Centre Spatial de Liège) >]
Bergeson, S. D. [> > > >]
Tsekeris, P. [> > > >]
Lawler, J. E. [> >]
Astronomy and Astrophysics
EDP Sciences
Yes (verified by ORBi)
Les Ulis
[en] atomic data ; Sun: abundances
[en] 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 α[SUB]Ti[/SUB] = log(N[SUB]Ti[/SUB]/N[SUB]H[/SUB]) + 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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