Abstract. We present results for the electron-impact excitation of F-like ions from Ne⁺ to Kr²⁷⁺ using an R-matrix approach where the intermediate-coupling frame transformation method has been used to obtain level-resolved collision strengths. For each calculation, the target has been expanded using 87 terms (195 levels) with the following configuration basis: 2s² 2p⁵, 2s 2p⁶, 2s² 2p⁴ 3l, 2s 2p⁵ 3l and 2s² 2p⁴ 4l. Comparisons are made with previous R-matrix calculations for the fine-structure transition over the whole sequence and other, more extensive, calculations on Ne⁺ and Fe¹⁷⁺. We examine iso-electronic trends of both low- and high-temperature effective collision strengths. This complete, self-consistent set of radiative and collision data is archived in multiple databases.

Print publication: Issue 15 (14 August 2007)
Received 2 May 2007, in final form 11 June 2007
Published 13 July 2007