Experimental oscillator strengths in Th II
Nilsson, Hampus; Zhang, Z G; Lundberg, Hans; Johansson, Sveneric, et al. (2002). Experimental oscillator strengths in Th II. Astronomy & Astrophysics, 382, (1), 368 - 377
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Published
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English
Authors:
Nilsson, Hampus
;
Zhang, Z G
;
Lundberg, Hans
;
Johansson, Sveneric
, et al.
Department:
Lund Observatory - Has been reorganised
Atomic Physics
Abstract:
We have measured radiative lifetimes of ten Th II levels by using thelaser-induced fluorescence technique and branching fractions withFourier transform spectroscopy. By combining the new branching fractionswith a total of 23 lifetimes, from the present work and frommeasurements by Simonsen et al. (cite{Simonsen}), absolute oscillatorstrengths for 180 lines have been derived. Some of these new f-valuesreported are relevant for radioactive dating of stars.
Keywords:
ATOMIC DATA ;
STARS: EVOLUTION ;
GALAXY: EVOLUTION ;
Astronomy, Astrophysics and Cosmology ;
Atom and Molecular Physics and Optics
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