Perturbation theory in calculations of atomic energy levels
- 11 July 1975
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 8 (10) , 1591-1602
- https://doi.org/10.1088/0022-3700/8/10/011
Abstract
On the basis of the field form of perturbation theory energy levels of atomic systems with numbers of electrons up to 10 are calculated. Configurations 1s22sn12pn2 (n1=0-2, n2=0-6) are considered. The coefficients Delta E1, Delta E2 in the energy expansion by powers of 1/Z E=E0Z2+ Delta E1Z+ Delta E2+ Delta E3 Z/1... are calculated. Hartree-Fock energies are also represented in the form of a Z-expansion, and the coefficients Delta E1HF, Delta E2HF, Delta E3HF of this expansion are computed. These calculations allow us to represent the correlation energy in the form of a Z-expansion.Keywords
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