Guseinov, Israfil IsaDemir, Ramazan2025-01-272025-01-2720011300-0101https://search.trdizin.gov.tr/tr/yayin/detay/33639https://hdl.handle.net/20.500.12428/13635Slater method is modified for the evaluation of determinantal wave functions appearing in open-shell Hartree-Fock (HF) theory. Using modified Slater method we have calculated, as an example, the orbital energies and the wave functions of terms obtained from the electronic configuration of a ground state of an N-atom system in the Hartree-Fock-Roothaan (HFR) approximation. The modified determinantal method introduced in this paper can be of considerable help and importance in the simplification and calculation of atomic and molecular electronic structure.eninfo:eu-repo/semantics/closedAccessDeterminantal wave function; Hartree-Fock theory; Open-shell systemArticle2554074142-s2.0-003487997033639Q2