Table 6.
Comparison between computed and observed lifetimes τ in seconds for the 26 lowest excited states in Al I.
| RCIa |
MCHF-BPb | Expt.cde | ||||
|---|---|---|---|---|---|---|
| Pos. | Conf. | LSJ | τl | τυ | τl | τobs |
| 1 | 30s2 4s | 2S1/2 | 6.734E-09 | 6.745E-09 | 6.558E-09 | 6.85(6)E-09c |
| 2 | 3s 3p2 | 4P1/2 | 1.652E-03 | 1.182E-03 | 4.950E-03 | |
| 3 | 4P3/2 | 6.702E-03 | 6.911E-03 | 13.24E-03 | ||
| 4 | 4P5/2 | 2.604E-03 | 3.681E-03 | 9.486E-03 | ||
| 5 | 3s2 3d | 2D3/2 | 1.272E-08 | 1.372E-08 | 1.472E-08 | 1.40(2)E-08c |
| 6 | 2D5/2 | 1.270E-08 | 1.371E-08 | 1.469E-08 | 1.40(2)E-08c | |
| 7 | 3s2 4p |  |
6.329E-08 | 6.357E-08 | 6.621E-08 | 6.05(9)E-08e |
| 8 |  |
6.300E-08 | 6.328E-08 | 6.590E-08 | 6.5 (2) E-08e | |
| 9 | 3s2 5s | 2S1/2 | 2.019E-08 | 2.027E-08 | 1.98(5)E-08c | |
| 10 | 3s2 4d | 2D3/2 a | 3.117E-08 | 2.919E-08 | 2.95(7)E-08c | |
| 11 | 2D5/2 a | 3.158E-08 | 2.953E-08 | 2.95(7)E-08c | ||
| 12 | 3s2 5p |  |
2.448E-07 | 2.532E-07 | 2.75(8)E-07c | |
| 13 |  |
2.429E-07 | 2.512E-07 | 2.75(8)E-07c | ||
| 14 | 3s2 4f |  |
6.041E-08 | 6.162E-08 | ||
| 15 |  |
6.041E-08 | 6.160E-08 | |||
| 16 | 3s2 6s | 2S1/2 | 4.812E-08 | 4.885E-08 | ||
| 17 | 3s2 4d | 2D3/2 b | 1.136E-08 | 1.083E-08 | 1.32(3)E-08d | |
| 18 | 2D5/2 b | 1.150E-08 | 1.093E-08 | 1.32(3)E-08d | ||
| 19 | 3s2 6p |  |
4.886E-07 | 6.952E-07 | ||
| 20 |  |
4.845E-07 | 6.882E-07 | |||
| 21 | 3s2 5f |  |
1.176E-07 | 1.172E-07 | ||
| 22 |  |
1.175E-07 | 1.172E-07 | |||
| 23 | 3s2 5g | 2G7/2 | 2.301E-07 | 2.315E-07 | ||
| 24 | 2G9/2 | 2.301E-07 | 2.315E-07 | |||
| 25 | 3s2 5d | 2D3/2 | 1.011E-08 | 9.855E-09 | 14.0(2)E-09d | |
| 26 | 2D5/2 | 1.020E-08 | 9.921E-09 | 14.0(2)E-09d | ||
Notes. For the current RCI calculations both length τl and velocity τυ forms are displayed. In Col. 6, the predicted lifetimes from MCHF-BP calculations are given in length form. The last column contains available lifetimes from experimental measurements together with their uncertainties.
References.
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