Abstract

The Dirac R-matrix method has been used to calculate collision strengths for the scattering of electrons with kinetic energy 100-300 Ryd by a neon-like selenium (Se24+) target. In these calculations the 27 jj-coupled levels arising from the configurations 1s22s22p6, 1s22s22p53s, 1s22s22p53p and 1s22s220p53d are included. Collision strengths converged to within 5% are obtained with twenty-four (N+1)-particle collision symmetries (partial waves). The rates for radiative transitions between the 27 levels have also been calculated. The authors' results are compared with previous calculations.

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