Collision strengths and oscillator strengths for inner-shell excitation of Na-like ions

Abstract Collision strengths are given for the fine-structure transitions involving 1 s 2 2 s 2 2 p 6 3 l −1 s 2 2 s 2 2 p 5 3 l ′3 l ″ and 1 s 2 2 s 2 2 p 6 3 l −1 s 2 2 s 2 p 6 3 l ′3 l ″ in 10 Na-like ions with nuclear charge number Z in the range 22 ⩽ Z ⩽ 62. Electric dipole oscillator strengths obtained with various methods are also given. Neither l ′ nor l ″ need equal l because both configuration mixing and mixing of intermediate-coupling type among all states with the same set of n values, parity, and J value are included in the calculations. For each transition the results for the collision strength are given for the five impact-electron energies in threshold units X = 1.0, 1.5, 2.5, 6.0, and 15.0. The upper levels of these transitions can radiatively decay, which produces satellite lines to those due to the n = 3 to n = 2 transitions in neon-like ions, or they can autoionize, which populates the 1 s 2 2 s 2 2 p 6 1 S 0 ground level of neon-like ions.