Journal of Structural Chemistry

, Volume 39, Issue 6, pp 819–828 | Cite as

Inclusion of correlations in He, Be, and Ne by the configuration interaction method

  • V. F. Demekhin
  • F. V. Demekhin
  • A. G. Kochur
  • N. V. Demekhina


The influence of various approximations used to include correlations in He, Be, and Ne atoms on correlation energies and on the structure of correlation functions is analyzed. The effects of three-and four-electron correlations are evaluated. For He, Be, and Ne atoms, the correlation energies were found to equal 99.99, 100.11, and 97.9% of the experimental value, respectively. A method of obtaining a one-electron function basis is proposed to ensure the best convergence of correlation energies as the number of included configurations increases.


Correlation Energy Excited Electron Radial Part Secular Equation Excited Configuration 
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Copyright information

© Kluwer Academic/Plenum Publishers 1999

Authors and Affiliations

  • V. F. Demekhin
    • 1
  • F. V. Demekhin
    • 1
  • A. G. Kochur
    • 1
  • N. V. Demekhina
    • 1
  1. 1.Rostov State University of Transport CommunicationsRostov-on-Don

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