New assignments of vibrational levels near dissociation in the Blxi state of H2 indicate the .vibrationai quantum number is proportional to the one-sixth power of the binding energy, as expected theoretically from the long-range r -j behavior of the internuclear potential. This is used to cXaia an i
On the usefulness of approximate exchange integrals in calculations of the long-range forces
β Scribed by L. Piela
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 158 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
The usefulness of Mulliken nnd Motagn-Kishimoto npproximntions in perrurbntionnl cnlculntions is investigxted. The calculntions are carried out for the hydrogen molecule in its ground and first excited states by n method similar to the Janson-Byors Brown method.
π SIMILAR VOLUMES
It is shown that the coefficient WQ of the leading relativistic correction to the London dispersion energy may be simply calculated by a variation-perturbation method previously used for the non-relativistic terms. W4 is calculated for a pair of interacting hydrogen atoms and good accuracy is attain
An approximation scheme was developed for the KohnαSham exchangeαcorrelation potential v , making use of a partitioning of v into a long-range screening v and xc x c scr a short-range response v component. For the response part, a model v mod was used, res p res p which represents v as weighted orbi
For many-electron atoms (molecules) the calculation of long-range interactions by the variation-perturbation method is ambiguous when the eigenfunction o. describing separate non-interacting atoms is not accurately known. Doubleperturbation theory is suggested as a systematic way of evaluating small
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