Table 1
Comparison of calculated and experimental atomic energy levels of hydrogen (in cm−1) for the n = 2 and n = 3 configurations.
| Level | Coulomb/DKH | Coulomb/DKH/mass | Experimental |
|---|---|---|---|
| 1s | 0 | 0 | 0 |
| 2s | 82 303.923 | 82 259.124 | 82 258.954 |
| 2p | 82 304.240 | 82 259.440 | 82 259.163 |
| 3s | 97 545.453 | 97 492.357 | 97 492.222 |
| 3p | 97 545.607 | 97 492.511 | 97 492.293 |
| 3d | 97 545.773 | 97 492.678 | 97 492.341 |
Notes. Column 2: theoretical levels including the DKH contribution. Column 3: theoretical levels with the DKH contributionand finite proton mass correction. The experimental data in Col. 4 correspond to averages over the j spin-orbit terms (weighted by 2j + 1) taken from Kramida et al. (2020).
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