College Physics ›› 2021, Vol. 40 ›› Issue (01): 21-23.doi: 10.16854 /j.cnki.1000-0712.200022

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Variational-perturbation calculation of the first excited state energy levels for Helium atom

BAI Zhan-wu,YAN Zhan-yuan   

  1. Department of Mathematics and Physics,North China Electric Power University,Baoding,Hebei 071003,China
  • Received:2020-01-22 Revised:2020-04-27 Online:2021-01-07 Published:2021-01-08

Abstract: The energies of 1S2S states of Helium atom are calculated by variational-perturbation method. The energies are calculated firstly by the variational method and then by the second-order perturbation theory. The results are superior to pure perturbation theory,and match well with the experimental data.

Key words: Helium atom, the first excited state, variational-perturbation theory