Eur. Phys. J. D 29, 195-199 (2004)
https://doi.org/10.1140/epjd/e2004-00043-1

Lifetimes of metastable levels in Ar II

¹ Physics Dept. Stockholm University, AlbaNova, 10691 Stockholm, Sweden
² Physics Dept. Royal Institute of Technology, AlbaNova, 10691 Stockholm, Sweden
³ Physikalisches Institute, Auf der Morgenstelle 14, 72076 Tuebingen, Germany
⁴ IPNAS (Bât. B 15), Université de Liège, Sart Tilman, 4000 Liège 1, Belgium and Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium

Corresponding author: ^a mannervik@physto.se

Received: 29 October 2003
Revised: 16 January 2004
Published online: 30 March 2004

Abstract

We report on a calculation of five lifetimes of metastable levels in Ar II, obtained with a relativistic Hartree-Fock method in which most of the intravalence correlation is represented within a configuration interaction scheme while core-valence correlation is described by a core-polarization model potential with a core-penetration corrective term. The quality of the calculation has been assessed through an experimental determination of the radiative lifetime of the metastable 3d ⁴F_9/2 level. The experiment was performed with a laser probing technique on a stored ion beam at the CRYRING of Stockholm.