The energy of electron affinity to a zirconium atom

Energies and g-factors of the ground states of a zirconium atom and its neg ative ion and energy of electron affinity to a neutral atom are calculated. The method used represents a combination of the superposition of configura tions and the determinant perturbation theory. A satisfactory agreement is obtained between the calculated energy of electron affinity and the experim ental value. This shows that the theory can provide an adequate description of complicated multielectron systems. (C) 2001 MAIK "Nauka/Interperiodica" .