FIRST-ORDER PERTURBATION CORRECTIONS TO THE HARTREE-FOCK APPROXIMATION FOR HELIUM
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Variational perturbation theory was 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 firstorder function was approximated by a Hylleraas-like expansion, explicitly containing r/ sub 12/. A total energy is obtained through third order of -2.90262 au, as compared with the nonrelativistic eigenvalue of -2.90372. The first-order corrections to expectation values of a selection of one- and two-electron operators were computed. The calculations were also done for the isoelectronic ions, H/sup -/, Li/sup +/, and Be/sup 2+/. (auth)
- Research Organization:
- National Bureau of Standards, Washington, D.C.
- NSA Number:
- NSA-18-002534
- OSTI ID:
- 4140856
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 132; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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