Several recently proposed perturbation theories of intermolecular forces including exchange are appiied to an e.xactly soluble spin model. ## zntuodmtion In the recent literature' [l-6] there have been many methods proposed for obtaining a useful perturbation theory of intermolecular forces incl
Application of exchange perturbation theories to the delta-function model of H+2
β Scribed by P.R. Certain; J.O. Hirschfelder; S.T. Epstein
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 296 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
A small change is made in the de!ta-function model so as to give it more of the characteristics of Hz. The EL -HAV approximation ia then tested on this model.
The ground state as well as some low-lying excited states of the Ne q molecule are 2 calculated by means of the third-order multireference many-body perturbation theory with the ''full'' eight-orbital valence space using DZP and polarized valence TZ basis sets. The problem encountered with a large n
The perturbation theory for projected states is shown to converge For a schematic one-dimensional model of Hi. Ordinary perturbation theory diverges for rhe odd state. It converges [or the even state, but very marginally for large inrcratomic distance. A previous paper by Peierls [l] discussed the m