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An Expansion Method for Calculating Atomic Properties

M. Cohen and A. Dalgarno
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 261, No. 1307 (May 23, 1961), pp. 565-576
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/2414195
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
An Expansion Method for Calculating Atomic Properties
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Abstract

An expansion method is described which provides a simple and rapid means of calculating for any atom the expectation values of sums of one-electron operators. All the equations which arise can be solved analytically and the results are obtained as functions of the nuclear charge. For inner shells the accuracy is comparable with that of the Hartree-Fock approximation. The method gives a quantitative description of the effects of direct and exchange interactions between electron shells. Results are given for all members of the helium and beryllium iso-electronic sequences.

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