Accession Number:

AD0435714

Title:

FIRST-ORDER PERTURBATION CORRECTIONS TO THE HARTREE-FOCK APPROXIMATION FOR HELIUM

Descriptive Note:

Corporate Author:

NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Personal Author(s):

Report Date:

1963-07-18

Pagination or Media Count:

7.0

Abstract:

Variational perturbation theory has been used to compute the first- order wave function for the ground state of the helium atom, in a scheme where the Hartree-Fock function is treated as the zeroth-order approximation. The first-order function was approximated by a Hylleraas-like expansion. A total energy through third order of -2.90262 a.u., as compared with the nonrelativistic eigenvalue of -2.90372 was obtained. The first-order corrections to expectation values of a selection of one- and two-electron operators have been computed. The calculations have also been done for the isoelectronic ions, H-, Li, and Be.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE