Answers are grounded in this paper and cite their sources.
A rapidly convergent method, which has previously been applied to the ground state of the helium atom, has been extended to excited S states. This method is based on an expansion of the wave function in powers of {article}{empty}{document}√r₁² + r₂²{document} , ln (r + r ), {article}{empty}{document}w = r₁₂ /√r₁² + r₂²{document} . Different effective nuclear charges are used for the inner and the outer electrons. Very satisfactory results are obtained for expectation values of various operators.
No takes yet. Share an insight, caveat, or question.
Ermolaev et al. (1968) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: