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Chin. Phys. B, 2014, Vol. 23(1): 013201    DOI: 10.1088/1674-1056/23/1/013201
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Ionization energies and term energies of the ground states 1s22s of lithium-like systems

Li Jin-Ying (李金英)a, Wang Zhi-Wen (王治文)a b
a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
b School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
Abstract  We extend the Hamiltonian method of the full-core plus correlation (FCPC) by minimizing the expectation value to calculate the non-relativistic energies and the wave functions of 1s22s states for the lithium-like systems from Z=41 to 50. The mass-polarization and the relativistic corrections including the kinetic-energy correction, the Darwin term, the electron–electron contact term, and the orbit–orbit interaction are calculated perturbatively as first-order correction. The contribution from quantum electrodynamic (QED) is also explored by using the effective nuclear charge formula. The ionization potential and term energies of the ground states 1s22s are derived and compared with other theoretical calculation results. It is shown that the FCPC methods are also effective for theoretical calculation of the ionic structure for high nuclear ion of lithium-like systems.
Keywords:  lithium-like systems      full core plus correlation      ionization energy      term energy  
Received:  02 May 2013      Revised:  21 July 2013      Accepted manuscript online: 
PACS:  32.10.Hq (Ionization potentials, electron affinities)  
  31.25.Nj  
  31.30.Jv  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11074102 and 11204118).
Corresponding Authors:  Li Jin-Ying     E-mail:  lily_ying2003@163.com

Cite this article: 

Li Jin-Ying (李金英), Wang Zhi-Wen (王治文) Ionization energies and term energies of the ground states 1s22s of lithium-like systems 2014 Chin. Phys. B 23 013201

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