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Excitation Energies of 1s2 ns (6≤n≤9) States for Lithium-Like Systems from Z=11 to 20 |
| HU Mu-Hong;WANG Zhi-Wen |
| Physics Department, Liaoning Normal University, Dalian 116029 |
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| Cite this article: |
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HU Mu-Hong, WANG Zhi-Wen 2005 Chin. Phys. Lett. 22 1089-1092 |
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Abstract The non-relativistic energies of 1s2 ns (6≤n≤9) states for the lithium-like systems from $Z = 11$ to 20 are calculated by using a full-core-plus-correlation (FCPC) method. The relativistic and mass-polarization effects on the energy are calculated by the first-order perturbation corrections. The correction from the quantum-electrodynamics effect is also included using effective nuclear charge. Based on these results and the quantum defect theory, the quantum defects of 1s2 ns series for these ions, as a function of energy, are determined. The comparisons between the ionization potentials for 1s2 ns states (6≤n≤9) obtained by the FCPC method and the semi-empirical method are carried out. The results show that their agreement is very well and the energies of all discrete states (n≥10) below the ionization threshold of this series for the ions can be predicted by using their quantum defects.
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| Keywords:
31.10.+z
32.10.Fn
32.70.Cs
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Published: 01 May 2005
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| PACS: |
31.10.+z
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(Theory of electronic structure, electronic transitions, and chemical binding)
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32.10.Fn
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(Fine and hyperfine structure)
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32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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