## Ray!aigh-Schrijdinger Perturbation theory has been applied through fifth order in the energy, to the problem of estimating the rodts of the secular equation in large configuration interaction calculations. The NO:, 03 and Hz0 molecules are used as test uses, wit% accuracy as good as O.Gl eV, wi
Application of perturbation theory to the limitation of the extent of the configuration interaction
✍ Scribed by F. Fratev; G. Hiebaum; A. Gochev
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 313 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A method for the limitation of the extent of the configuration interaction is described, giving results which are practically equal to those obtained by taking into account all contigurations. This approach provides the principal possibility for the most csnct calculation through configuration interaction of the correlation corrections of the eneraa and the electron structure of the lowest exited states of the Inger (more than 20 atoms) molecules. Such 3 possibility is of great importance in the interpretation of the photochemical propertics of compounds.
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