Hong Lin Zhang

Relativistic distorted-wave collision strengths and oscillator strengths for the 45 Δn = 0 transitions with n = 2 in the 85 Be-like ions with 8 ≤ Z ≤ 92

Relativistic distorted-wave collision strengths have been calculated for the 45 [Delta]n = 0 transitions with n = 2 in the 85 Be-like ions with nuclear charge number Z in the range 8 [le] Z [le] 92. The calculations were made for the six final, or scattered, electron energies E[prime] = 0.03, 0.08, 0.20, 0.42, 0.80, and 1.40, where E[prime] is in units of Z[sub eff][sup 2] rydbergs with Z[sub eff] = Z [minus] 2.5. In addition, the transition energies and electric dipole oscillator strengths are given. The present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of highly charged Be-like ions. 26 refs., 3 tabs.

Relativistic distorted-wave collision strengths and oscillator strengths for the 85 Li-like ions with 8 <- Z <- 92☆

Relativistic distorted wave collision strengths are given for the 3 transitions among the 2s{sub 1/2}, 2p{sub 1/2}, and 2p{sub 3/2} levels and for the 63 transitions from these levels to the excited levels nlj with n = 3, 4, and 5 in the 85 Li-like ions with nuclear charge number Z in the range 8 {le} Z {le} 92. The calculations were made for the six final, or scattered, electron energies E{prime} = 0.008, 0.04, 0.10, 0.21, 0.41, and 0.75, where E{prime} is in units of Z{sup 2}{sub eff} rydbergs with Z{sub eff} = Z - 1.66. In addition, the transition energies and electric dipole oscillator strengths are given. To their knowledge the present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of Li-like ions.

Relativistic distorted wave collision strengths and oscillator strengths for the 71 Na-like ions with 22 ≤ Z ≤ 92☆

Relativistic distorted wave collision strengths are given for the 10 transitions among the 3s12, 3p12, 3p32, and 3d52 levels and for the 80 transitions from these levels to the excited levels nlj with n = 4 and 5 in the 71 Na-like ions with nuclear charge number Z in the range 22 ≤ Z ≤ 92. The calculations were made for the six final, or scattered, electron energies E′ = 0.0025, 0.015, 0.04, 0.10, 0.21, and 0.40, where E′ is in units of Zeff2 rydbergs with Zeff = Z − 8.34. In addition, the transition energies and electric dipole oscillator strengths are given. To our knowledge the present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of Na-like ions.

Relativistic distorted-wave collision strengths and oscillator strengths for f-like ions with 22 ≤ Z ≤ 92☆

Abstract Relativistic distorted-wave collision strengths have been calculated for the three transitions among the three levels with a hole in the n = 2 shell and for the 327 transitions from these levels to the excited levels with two holes in the n = 2 shell and one electron in the n = 3 shell in all the 71 F-like ions with nuclear charge number Z in the range 22 ≤ Z ≤ 92. The results are given here for a sample of 18 values of Z . The calculations were made for the six final, or scattered, electron energies E ′ = 0.008, 0.04, 0.10, 0.21, 0.41, and 0.75, where E ′ is in units of Z eff 2 rydbergs with Z eff = Z − 6.667. In addition, the transition energies and electric dipole oscillator strengths are given. To our knowledge the present work is the first comprehensive publication of the results of fully relativistic calculations of the collision strengths for excitation of F-like ions.

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.