| Issue |
A&A
Volume 382, Number 1, JanuaryIV 2002
|
|
|---|---|---|
| Page(s) | 368 - 377 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361:20011597 | |
| Published online | 15 January 2002 | |
Experimental oscillator strengths in Th II
1
Atomic Astrophysics, Lund Observatory, Lund University, PO Box 43, 22100 Lund, Sweden
2
Atomic Physics, Department of Physics, Lund Institute of Technology, PO Box 118, 22100 Lund, Sweden
3
Niels Bohr Institute for Astronomy, Physics & Geophysics, Juliane Marie vej 30, 2100 Copenhagen, Denmark e-mail: zhang.zhiguo@fysik.lth.se; hans.lundberg@fysik.lth.se; sveneric.johansson@astro.lu.se; birgitta@astro.ku.dk
Corresponding author: H. Nilsson, hampus.nilsson@astro.lu.se
Received:
17
October
2001
Accepted:
5
November
2001
We have measured radiative lifetimes of ten Th II levels by using the laser-induced fluorescence technique and branching fractions with Fourier transform spectroscopy. By combining the new branching fractions with a total of 23 lifetimes, from the present work and from measurements by Simonsen et al. ([CITE]), absolute oscillator strengths for 180 lines have been derived. Some of these new f-values reported are relevant for radioactive dating of stars.
Key words: atomic data / stars: evolution / Galaxy: evolution
© ESO, 2002
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