Abstract
Theoretical parameters at for the self-consistent-field—Ξa(SCFΞa) method are derived by considering the Fermi hole, modified from the form used to generate the theoretical α parameters in the Xα method, because of including explicit self-interaction in the Hamiltonian, which scales the exchange potential. The at for all elements in the Periodic Table are given, to compare with previous compilations. For Z>30 they are in error due to relativistic effects becoming important. The results from the SCFΞa method with at have been compared with those previously calculated for Cu+, Mn2+, Ne, and Ar for the one-electron energies -εi, the total energies E, the Fermi contact terms χ, and the core-spin densities.