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Theoretical Study of Interesting Fine-Structure Splittings for 23P0, 1, 2 States along Helium Isoelectronic Sequence |
| QING Bo1, CHEN Shao-Hao1, GAO Xiang2, LI Jia-Ming1,2 |
| 1The Key Laboratory of Atomic and Molecular Nanosciences of the Ministry of Education, Department of Physics, Tsinghua University, Beijing 1000842Department of Physics, Shanghai Key Laboratory for Laser Fabrication and Material Science, Shanghai Jiaotong University, Shanghai 200030 |
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| Cite this article: |
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QING Bo, CHEN Shao-Hao, GAO Xiang et al 2008 Chin. Phys. Lett. 25 2448-2451 |
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Abstract Using the multi-configuration Dirac--Fock method including the Breit interactions and QED corrections, we calculate the fine-structure energy levels of the 23P0, 1, 2 states along the helium isoelectronic sequence with atomic number up to Z=36, where LS-coupling is appropriate. Our calculation results agree with the experimental results within about 1%. We elucidate the mechanism of the interesting fine-structure splittings for the 23P0, 1, 2 states along the helium isoelectronic sequence, i.e. the competitions between the spin--orbit interactions and the Breit interactions which represent the relativistic retardation effect of electromagnetic interactions.
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| Keywords:
31.15.Ar
31.25.Jf
31.30.Jv
32.10.Fn
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Received: 22 January 2008
Published: 26 June 2008
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