Chemical Physics Letters, Vol.494, No.4-6, 312-314, 2010
Simple models for electron correlation energies in atoms
Simple two-and three-parameter models that describe the variation of the electron correlation energy of atoms with atomic number are presented. Despite their simplicity, these models have an accuracy comparable to the best available density functionals for the correlation energy. (C) 2010 Elsevier B. V. All rights reserved.