Electron excitation from the 1 1 S, 2 3 S and 2 1 S states of helium. An eleven-state R-matrix calculation
β Scribed by Berrington, K A; Burke, P G; Freitas, L C G; Kingston, A E
- Book ID
- 121864814
- Publisher
- Institute of Physics
- Year
- 1985
- Tongue
- English
- Weight
- 647 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-3700
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## Abstract A simple self consistent variation perturbation method in the coupled HartreeβFock scheme has been proposed to calculate 1__s__2__s__ ^1^__S__ state of the He atom. The present paper deals with an 1__s__2__s__ ^1^__S__ wave function in which all the relevant orthogonality conditions are
## Abstract In this paper we present a simple method within the coupled HartreeβFock framework to calculate the 1__s__2__s__ ^3^__S__ state of helium and heliumlike ions. The results are in very good agreement with those obtained by the use of multiterm correlated wave functions. Some interesting o
The density difference ED, defined as the difference between the exact and the Hertree-Fock radial density functions is reported for the 23S and the 2 'S exerted states of the helium atom. The density differences in both eeses resemble the inverse of the helium grow&state density drfference, but are