A note on local exchange approximations in electronic collisions

To assess the value of the free electron gas exchange approximation, based on Slater’s local approximation of exchange, we compare the test cases the results given by the exact formula with results given by modified formulae reviewed by Riley and Truhlar [J. Chem. Phys. 63, 2182 (1975)]. The exact f...

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Bibliographic Details
Published in:The Journal of chemical physics 1977-10, Vol.67 (7), p.3399-3400
Main Authors: Baille, P., Darewych, J. W.
Format: Article
Language:English
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Summary:To assess the value of the free electron gas exchange approximation, based on Slater’s local approximation of exchange, we compare the test cases the results given by the exact formula with results given by modified formulae reviewed by Riley and Truhlar [J. Chem. Phys. 63, 2182 (1975)]. The exact formula is not superior and therefore we favor the semiclassical exchange approximation which performs well even for scattering lengths.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.435292