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Table 3.

Observed and computed excitation energies in cm−1 for the 10 and 20 lowest states in Al I and Al II, respectively.

Pos. Conf. LSJ Eobsa ERCIb ΔEMCHF − BPc
Al I
1 3s2 3p 0 0 0 0
2 112 104 8 22
3 3s2 4s 2S1/2 25 348 25 196 152 −235
4 3s 3p2 4P1/2 29 020 28 863 157 940
5 4P3/2 29 067 28 907 160 949
6 4P5/2 29 143 28 981 162 964
7 3s2 3d 2D3/2 32 435 32 414 21 250
8 2D5/2 32 437 32 416 21 251
9 3s2 4p 32 950 32 801 149 −98
10 32 966 32 814 152 −94
Al II
1 3s2 1S0 0 0 0 0
2 3s 3p 37 393 37 445 −52 9
3 37 454 37 503 −49 8
4 37 578 37 626 −48 6
5 59 852 59 982 −130 −177
6 3p2  1D2 85 481 85 692 −211 −305
7 3s 4s 3S1 91 275 91 425 −150 −376
8 3p2 3P0 94 085 94 211 −126 −107
9 3P1 94 147 94 264 −117 −111
10 3P2 94 269 94 375 −106 −113
11 3s 4s  1S0 95 351 95 543 −192 −400
12 3s 3d 3D2 95 549 95 791 −242 −527
13 3D1 95 551 95 794 −243 −527
14 3D3 95 551 95 804 −253 −529
15 3s 4p 105 428 105 582 −154 −357
16 105 442 105 594 −152 −360
17 105 471 105 623 −152 −363
18 106 921 107 132 −211 −365
19 3s 3d 1D2 110 090 110 330 −240 −475
20 3p2  1S0 111 637 112 086 −449 −445

Notes. In the last two columns, the difference ΔE between observed and computed energies is compared for the current RCI and previous MCHF-BP calculations.

References.

(b)

present calculations;

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