Abstract
The wavelengths of the 1snp 1P10-1s2 1S0 transitions in the He-like Mg XI (n = 4-9) and F VIII (n = 4-8) have been measured in laser-produced plasmas. The accuracy of the present measurements (0.4-1.6 mÅ) is a large improvement over previous results. The Rydberg series is used to determine the ground-state ionization energy off VIII and Mg XI: Eion (F VIII) = 953.96±0.11 eV, Eion (Mg XI) = 1761.88 ± 0.15 eV. These experimental results are compared with theoretical data calculated by the 1/Z-expansion method and the HFR and MCDF approaches. Fairly good agreement between theory and experiment is observed with a precision up to 5 × 10-5. Radiative corrections to the 1s2 1S0 state are analysed and compared with experiments. It is found that QED corrections to the ground-state ionization energy are significant at the present level of experimental accuracy.
| Original language | English |
|---|---|
| Article number | 310 |
| Pages (from-to) | 2741-2754 |
| Number of pages | 14 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 35 |
| Issue number | 12 |
| DOIs | |
| State | Published - 28 Jun 2002 |
| Externally published | Yes |
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