Theoretica chimica acta

, Volume 32, Issue 1, pp 1–12 | Cite as

Perturbation calculations on the split-shell wavefunctions of two-electron atoms

  • Delano P. Chong
  • Chee P. Yue
  • William R. Scott


In a special case of the Löwdin-Adams variant of perturbation theory, knowledge of the perturbed wavefunction through first order is sufficient for the calculation of the energy correct to the fifth order. This is applied to the split-shell wavefunctions of H, He, and Li. The results are presented, compared with other approaches, and discussed.

Key words

Helium isoelectronic series Split-shell wavefunctions Löwdin-Adams perturbation theory Off-diagonal perturbation Scaled perturbation 


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Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • Delano P. Chong
    • 1
  • Chee P. Yue
    • 1
  • William R. Scott
    • 1
  1. 1.Department of ChemistryUniversity of British ColumbiaVancouver 8Canada

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