Table 1
Transition data for Al I, for lines with derived log gf values.
| Upper level | Lower level | σ(a) (cm−1) |  (Å) |
BFexp | UncBF (%) | Aul (s−1) | log gfexp | Uncgf (%) |
|---|---|---|---|---|---|---|---|---|
| 4p 2P1/2 | 4s 2S1/2 | 7602.048 | 13154.350 | 0.9998 | 0.01 | 1.54 × 107 | −0.0980 | 3.1 |
| Residual | 0.0002 | |||||||
| τ = 65(2) ns (b) | ||||||||
| 4p 2Pз/2 | 4s 2S1/2 | 7617.884 | 13127.005 | 0.9998 | 0.01 | 1.65 × 107 | 0.232 | 1.5 |
| Residual | 0.0002 | |||||||
| τ = 60.5(9) ns (b) | ||||||||
| 5p 2P1/2 | 5s 2S1/2 | 2582.565 | 38721.19 | 0.558 | 5 | 2.03 × 106 | −0.0396 | 6 |
| 3d 2D3/2 | 7836.521 | 12760.765 | 0.013 | 10 | 4.88 × 104 | −2.62 | 11 | |
| 4s 2S1/2 | 14924.209 | 6700.522 | 0.352 | 8 | 1.28 × 106 | −1.76 | 8 | |
| Residual | 0.077 | |||||||
| τ = 275(8) ns (c) | ||||||||
| 5p 2Pз/2 | 5s 2S1/2 | 2588.472 | 38632.83 | 0.557 | 6 | 2.03 × 106 | 0.259 | 7 |
| 3d 2D5/2 | 7841.048 | 12753.397 | 0.015 | 8 | 5.31 × 104 | −2.29 | 9 | |
| 4s 2S1/2 | 14930.134 | 6697.864 | 0.358 | 8 | 1.30 × 106 | −1.46 | 9 | |
| Residual | 0.078 | |||||||
| τ = 275(8) ns (c) | ||||||||
| 4f 2F5/2 | nd 2D3/2 | 2389.976 | 41841.42 | 0.155 | 9 | 2.57 × 106 | 0.607 | 10 (*) |
| 3d 2D3/2 | 8883.937 | 11256.270 | 0.778 | 4 | 1.29 × 107 | 0.167 | 5 (*) | |
| Residual | 0.067 | |||||||
| τ = 60.4(12) ns (d) | ||||||||
| 4f 2F7/2 | nd 2D5/2 | 2385.46 | 41920.7 | 0.157 (e) | 10 | 2.59 × 106 | 0.737 | 11 (*) |
| 3d 2D5/2 | 8882.566 | 11258.008 | 0.843 | 1 | 1.40 × 107 | 0.327 | 2 (*) | |
| Residual | 0.000 | |||||||
| τ = 60.4(12) ns (d) | ||||||||
Notes. Lifetimes used in the analysis include experimental(b,c) and theoretical(d) sources. Residuals are derived from the calculated transition rates by Papoulia et al. (2019). (a) Wavenumbers and wavelengths are from the NIST database (Kramida et al. 2021), based on studies by Eriksson & Isberg (1963), Biémont & Brault (1987), and Chang (1990). All wavelengths given are in vacuum, λvac. (b) Buurman & Dönszelmann (1990); (c) Buurman et al. (1986); (d) Papoulia et al. (2019); (*) Using the uncertainty in the lifetime u(τ) from Papoulia et al. (2019). (e) This is blended by nd 2D5/2–4f 2F5/2, but the latter is predicted to be more than an order of magnitude weaker and is thus omitted. This is reflected in the uncertainty of this line.
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