The FERRUM project: improved experimental oscillator strengths in Cr II

¹ Atomic Astrophysics, Lund Observatory, Lund University, Box 43, 221 00 Lund, Sweden
² Atomic Physics, Department of Physics, Lund Institute of Technology, Box 118, 221 00 Lund, Sweden
³ Catholic University of America, Washington, DC 20064, USA
⁴ Exploration of the Universe Division, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA

Received: 5 September 2005
Accepted: 14 September 2005

Abstract

We report absolute oscillator strengths for 119 transitions in the wavelength region 2050-4850 Å. The transition probabilities have been derived by combining radiative lifetimes, measured with time-resolved laser induced fluorescence, and branching fractions from intensity calibrated Fouirer transform spectrometer data. New radiative lifetimes for the 3d⁴(⁵D)4p ⁴F, ⁴D and ⁶P terms are reported, adding up to a total of 25 energy levels with measured lifetimes used to derive this improved set of atomic data.