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Table 1.
Energy levels of the Fe2+ 3d6 configuration.
| Index | Level | J | FAC (eV) | NIST (eV) |
|---|---|---|---|---|
| 0 |
 |
4 | 0.000 | 0.000 |
| 1 |
 |
3 | 0.062 | 0.054 |
| 2 |
 |
2 | 0.104 | 0.092 |
| 3 |
 |
1 | 0.132 | 0.116 |
| 4 |
 |
0 | 0.145 | 0.127 |
| 5 |
 |
6 | 2.481 | 2.486 |
| 6 |
 |
5 | 2.515 | 2.517 |
| 7 |
 |
4 | 2.539 | 2.539 |
| 8 |
 |
2 | 2.713 | 2.710 |
| 9 |
 |
4 | 2.849 | 2.661 |
| 10 |
 |
3 | 2.885 | 2.690 |
| 11 |
 |
1 | 2.896 | 2.565 |
| 12 |
 |
2 | 2.911 | 2.406 |
| 13 |
 |
0 | 2.969 | 2.629 |
| 14 |
 |
5 | 3.156 | 3.045 |
| 15 |
 |
4 | 3.214 | 3.092 |
| 16 |
 |
3 | 3.240 | 3.117 |
| 17 |
 |
6 | 3.746 | 3.764 |
| 18 |
 |
4 | 3.961 | 3.829 |
| 19 |
 |
1 | 4.105 | 3.809 |
| 20 |
 |
2 | 4.106 | 3.808 |
| 21 |
 |
3 | 4.126 | 3.825 |
| 22 |
 |
0 | 4.618 | 4.316 |
| 23 |
 |
2 | 4.957 | 4.439 |
| 24 |
 |
3 | 5.740 | 5.319 |
| 25 |
 |
0 | 6.764 | 6.094 |
| 26 |
 |
2 | 6.779 | 6.222 |
| 27 |
 |
4 | 6.797 | 6.233 |
| 28 |
 |
3 | 6.797 | 6.236 |
| 29 |
 |
1 | 6.825 | 6.147 |
| 30 |
 |
2 | 6.946 | 6.250 |
| 31 |
 |
4 | 7.665 | 7.095 |
| 32 |
 |
2 | 10.386 | |
| 33 |
 |
0 | 13.414 |
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