Abstract Based on the obtained energy values of 1s$^{2}n$p ($n \le $ 9) states for lithium-like systems from $Z$=11 to 20 (by the authors of this paper: Hu M H and Wang Z W 2004 Chin. Phys.13 662), this paper determines the quantum defects, as slowly varying function of energy, of this Rydberg series. Using them as input, it can predict the energies of any highly excited states below the ionization threshold for this series according to the quantum defect theory. The regularities of variation for quantum defects of the series along this isoelectronic sequence are physically analysed and discussed. The screening parameters, which are equal to the effective screening charge of the core-electrons, are also obtained.
Received: 18 May 2007
Revised: 02 July 2007
Accepted manuscript online:
PACS:
31.15.-p
(Calculations and mathematical techniques in atomic and molecular physics)
(Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions)
Fund: Project supported by the National
Natural Science Foundation of China
(Grant Nos 10474029 and 10774063).
Cite this article:
Hu Mu-Hong(胡木宏) and Wang Zhi-Wen(王治文) Behaviours of the excited states 1s2np along lithium isoelectronic sequence from Z=11 to 20 2008 Chin. Phys. B 17 908
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