Energy levels and transition rates for the boron isoelectronic sequence: Si X, Ti XVIII – Cu XXV^⋆,⋆⋆

¹ Group for Materials Science and Applied Mathematics, Malmö University, Sweden
e-mail: per.jonsson@mah.se
² Vilnius University, Institute of Theoretical Physics and Astronomy, A. Goštauto 12, 01108 Vilnius, Lithuania
³ Chimie Quantique et Photophysique, CP160/09, Université Libre de Bruxelles, Av. F.D. Roosevelt 50, 1050 Brussels, Belgium
⁴ Department of Electrical Engineering and Computer Science, Box 1679B, Vanderbilt University, TN 37235, USA

Received: 14 May 2013
Accepted: 14 July 2013

Abstract

Relativistic configuration interaction (RCI) calculations are performed for 291 states belonging to the configurations 1s²2s²2p, 1s²2s2p², 1s²2p³, 1s²2s²3l, 1s²2s2p3l, 1s²2p²3l, 1s²2s²4l′, 1s²2s2p4l′, and 1s²2p²4l′ (l = 0,1,2 and l′ = 0,1,2,3) in boron-like ions Si X and Ti XVIII to Cu XXV. Electron correlation effects are represented in the wave functions by large configuration state function (CSF) expansions. States are transformed from jj-coupling to LS-coupling, and the LS-percentage compositions are used for labeling the levels. Radiative electric dipole transition rates are given for all ions, leading to massive data sets. Calculated energy levels are compared with other theoretical predictions and crosschecked against the Chianti database, NIST recommended values, and other observations. The accuracy of the calculations are high enough to facilitate the identification of observed spectral lines.