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Table 2
Number of levels included in the SPEX database for C, O, Si, and Fe from H-like to C-like iso-electronic sequences.
| Number of levels in SPEX | ||||
|---|---|---|---|---|
| Iso-electronic sequence | C | O | Si | Fe |
| H-like | 284 | 284 | 284 | 284 |
| He-like | 678 | 678 | 678 | 678 |
| Li-like | 885 | 885 | 885 | 889 |
| Be-like | 753 | 727 | 753 | 808 |
| B-like | 719 | 973 | 972 | 1100 |
| C-like | 1199 | 1218 | 1218 | 1525 |
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