Abstract
We have calculated fine-structure energy levels, oscillator strengths and transition probabilities for transitions among the terms belonging to the 1s
22s
22p
6
ns (
2S), 1s
22s
22p
6
np (
2P), 1s
22s
22p
6
nd (
2D) (
n
=
3, 4, 5), and 1s
22s
22p
6
nf (
2F) (
n
=
4, 5) configurations. The calculations are based upon the general configuration-interaction code CIV3 of Hibbert which uses orthonormal orbitals of radial functions expressed as superpositions of normalized Slater-type orbitals. Our calculated values are compared with experimental and other theoretical results where a satisfactory agreement is found. We also report on some unpublished energy values and oscillator strengths.