Oscillator strengths for lines of astrophysical interest in Rh II^⋆

¹ Astrophysique et Spectroscopie, Université de Mons – UMONS, 7000 Mons, Belgium
e-mail: quinet@umons.ac.be
² IPNAS, Université de Liège, Sart Tilman, 4000 Liège, Belgium
³ Department of Physics, Lund University, PO Box 118, 221 00 Lund, Sweden
⁴ Lund Observatory, Lund University, PO Box 43, 221 00 Lund, Sweden

Received: 4 October 2011
Accepted: 24 October 2011

Abstract

Aims. This work reports oscillator strengths for transitions of astrophysical interest in singly ionized rhodium.

Methods. Seventeen radiative lifetimes in Rh⁺ have been measured with the time-resolved laser-induced fluorescence technique and combined with theoretical branching fractions calculated using a relativistic Hartree-Fock model including core-polarization effects to obtain oscillator strengths.

Results. On the basis of the good agreement between theory and experiment for the lifetimes, new reliable oscillator strengths have been deduced for a set of 113 Rh II transitions in the spectral range 153–418 nm.