The excitation energies and term energies of the excited states 1s2ns (n=3,4,5) and 1s2nf (n=4,5) of lithium-like systems of Z=11－20
Ge Zi-Ming (葛自明)a, Wang Zhi-Wen (王治文)bc, Zhou Ya-Jun (周雅君)b, He Li-Ming (贺黎明)a, Liu Guo-Guang (刘国光)a
a Department of Physics, East China University of Science and Technology, Shanghai 200237, China; b Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China; c Department of Physics, Liaoning Normal University, Dalian 110628, China
Abstract In this paper, the full-core plus correlation (FCPC) and the Ritz method is extended to calculate the non-relativistic energies of 1s2ns (n=3,4,5) and 1s2nf (n=4,5) states and the wavefunctions of the lithium-like systems from Z=11－20. The mass-polarization and the relativistic correction including the kinetic-energy correction, the Darwin term, the electron－electron contact term, and the orbit－orbit interaction are evaluated perturbatively as the first-order correction. The contribution from quantum electrodynamic is also included by using the effective nuclear charge formula. The excited energies, the term-energy and fine structure, are given and compared with the other theoretical calculation and experimental results. It is shown that the correlative wave in the FCPC method embodies well the strong correlation between the 1s2 core and the valence electron.
Received: 27 November 2002
Revised: 26 December 2002
Accepted manuscript online:
PACS:
31.30.J-
(Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10174029).
Cite this article:
Ge Zi-Ming (葛自明), Wang Zhi-Wen (王治文), Zhou Ya-Jun (周雅君), He Li-Ming (贺黎明), Liu Guo-Guang (刘国光) The excitation energies and term energies of the excited states 1s2ns (n=3,4,5) and 1s2nf (n=4,5) of lithium-like systems of Z=11－20 2003 Chinese Physics 12 488
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