Table 1
Number of levels and transitions obtained with HFR calculations and used for opacity determination in Hf, Os, and Au I–IV ions.
| Ion | Nlevels (a) | Nlines (b) | IP (cm−1)(c) |
|---|---|---|---|
| Hf I | 8694 | 349 524 | 55 048 |
| Hf II | 2060 | 170 114 | 117 820 |
| Hf III | 355 | 12 472 | 181 840 |
| Hf IV | 322 | 9312 | 269 150 |
| Os I | 18 925 | 3 986602 | 68 059 |
| Os II | 14331 | 6 506 304 | 137 000 |
| Os III | 16 158 | 2 538 381 | 202 000 |
| Os IV | 10 230 | 3 454 744 | 331 000 |
| Au I | 1692 | 1244 | 74409 |
| Au II | 6481 | 23 107 | 162 950 |
| Au III | 14 627 | 186 596 | 242 000 |
| Au IV | 8235 | 994995 | 363 000 |
Notes. The ionization potentials are also listed in the last column for each ion. (a)Total number of energy levels obtained in HFR calculations. (b)Total number of transitions involving energy levels below the ionization potential for which log gf > −5. (c)Ionization potential taken from the NIST database (Kramida et al. 2023).
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