[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).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bizzarri, A.
Huber, M. C. E.
Noels-Grötsch, Arlette ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO)
Grevesse, Nicolas ; Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Bergeson, S. D.
Tsekeris, P.
Lawler, J. E.
Language :
English
Title :
Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance