Accurate Analytical Self-Consistent-Field Functions for Atoms. VIII. The Ground States ofK+, K, and Ca

Abstract
Self-consistent-field calculations by the expansion method were carried out for the ground states of K+, K, and Ca. The merit of this calculation is in its accuracy. Compared with solutions of the Hartree-Fock equations by the numerical-integration technique, the wave functions are considered accurate to three decimal places. The deviations from the nodal condition for the radial functions do not exceed 0.00006. The cusp condition is exactly satisfied.