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Fine-Structure Splittings of Nitrogen Isoelectronic Sequence: Competitions among Spin--Orbit Interactions, Breit Interactions and Electron Correlations |
| WANG Xiao-Lu1;CHEN Shao-Hao2;HAN Xiao-Ying2;LI Jia-Ming 1,2 |
| 1Department of Physics, Shanghai Key Laboratory for Laser Fabrication and Material Science, Shanghai Jiaotong University, Shanghai 2002402The Key Laboratory of Atomic and Molecular Nanosciences of the Ministry of Education, Department of Physics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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WANG Xiao-Lu, CHEN Shao-Hao, HAN Xiao-Ying et al 2008 Chin. Phys. Lett. 25 903-906 |
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Abstract Using the multi-configuration Dirac--Fock self-consistent field method and the relativistic configuration interaction method with quantum-electrodynamics
corrections performed by the GRASP code, we calculate the fine-structure energy levels of the ground-state configuration (1s22s22p3) of the nitrogen isoelectronic sequence, according to the L-S coupling scheme with atomic number Z up to 22. Based on the calculated results, we elucidate the mechanism of the orderings of fine-structure energy levels of 2D3/2,5/2 and
2P1/2,3/2 respectively, i.e. for 2D3/2,5/2 orderings, the competition between the spin--orbit interactions and the Breit interactions; for 2P1/2,3/2 orderings, the electron correlations, especially the electron correlations owing to the
2p5 configuration interactions.
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| Keywords:
31.25.-v
31.30.Jv
32.10.Fn
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Received: 09 December 2007
Published: 27 February 2008
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