Statistical electron angular correlation coefficients for atoms within the Hohenberg-Kohn-Sham theory

Statistical electron angular correlation coefficients tau = 2 < summation/sup /, have been obtained for the atomic systems 2He through 14Si, within the Hohenberg-Kohn-Sham density-functional formalism. These are computed with use of the spectral sum rules obtained from the pseudoexcitation spectrum employing the recent formulation of the time-dependent Kohn-Sham theory due to Bartolotti. Various approximations to the exchange-correlation energy functional are used and for first-row atoms, a comparison is made with the highly accurate correlation coefficients recently obtained by Thakkar. The present tau values show closer agreement with those of Thakkar with increasing number of electrons