College Physics ›› 2021, Vol. 40 ›› Issue (01): 21-23.doi: 10.16854 /j.cnki.1000-0712.200022
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BAI Zhan-wu，YAN Zhan-yuan
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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
BAI Zhan-wu, YAN Zhan-yuan. Variational-perturbation calculation of the first excited state energy levels for Helium atom[J].College Physics, 2021, 40(01): 21-23.
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URL: https://dxwl.bnu.edu.cn/EN/10.16854 /j.cnki.1000-0712.200022
https://dxwl.bnu.edu.cn/EN/Y2021/V40/I01/21
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