Experimental oscillator strengths in U II of cosmological interest
Lund Observatory, Lund University, PO Box 43, 22100 Lund, Sweden
2 Department of Physics, Lund Institute of Technology, PO Box 118, 22100 Lund, Sweden e-mail: email@example.com; firstname.lastname@example.org; email@example.com
Corresponding author: H. Nilsson, firstname.lastname@example.org
Accepted: 30 October 2001
Oscillator strengths for 57 U II lines in the region 3500–6700 Å have been derived by combining new branching fraction measurements with recently measured lifetimes. The lines combine six upper levels with numerous low levels having excitation energies of 0–1.5 eV. The data include the U II line at 3859 Å, which is used for cosmochronology.
Key words: atomic data / stars: evolution / Galaxy: evolution
© ESO, 2002