Abstract
A brief description is given of the conceptual background and formalism of the various ab-initio and semi-ab-initio quantum computational techniques for calculating atomic and molecular electron affinities: Hartree-Fock-Roothaan SCF, configuration interaction (CI), multiconfiguration SCF (MC-SCF), Bethe-Goldstone, superposition of configurations (SOC), ab-initio effective core model potentials, Xα-MS, plus other less comnon methods. Illustrative and comparative examples of electron affinities calculated by these various methods are presented.
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