| ATOMIC AND MOLECULAR PHYSICS |
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The Scaling Law in the Fine-Structure Splitting of 1s2np States for the Lithium Isoelectronic Sequence |
| CAI Juan**, YU Wei-Wei**, ZHANG Nan |
School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029
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| Cite this article: |
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CAI Juan, YU Wei-Wei, ZHANG Nan 2014 Chin. Phys. Lett. 31 093101 |
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Abstract The 'full-core plus correlation' (FCPC) and the 'minimizing the expectation value of the Hamiltonian' methods are extended to calculate the fine-structure splitting of 1s2np (n=2–9) states for the lithium-like systems from Z=21 to 30. The leading order relativistic effect is included by using first-order perturbation theory. The higher-order relativistic and the quantum-electrodynamics contributions to the fine-structure splitting are investigated under a hydrogenic approximation with effective nuclear charges. Our results are compared with other theoretical calculations and experimental results. It is shown that the FCPC method is also effective to obtain the ionic structure for high nuclear ions of lithium-like systems. By fitting our theoretical results, the scaling law of the fine-structure splitting of the lithium isoelectronic sequence behaves like a quartic function of the screened nuclear charge Z*.
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Published: 22 August 2014
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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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