WAVELENGTHS AND ENERGY-LEVELS FOR THE ZN-I ISOELECTRONIC SEQUENCE SN20+ THROUGH U62+

Calculated and experimentally determined transition energies are presented for the Zn I isoelectronic sequence for the elements with atomic numbers Z = 50-92. The excitation energies were calculated for the 84 levels belonging to the 10 configurations of the type 4l4l' by using the Hebrew University Lawrence Livermore Atomic Code (HULLAC). The analysis of the energy level structure along the isoelectronic sequence accounted for 20 avoided level crossings. The differences between the calculated and experimental transition energies were determined for 16 transitions, and the excitation energies of the levels belonging to the 4s4p, 4p(2), 4s4d, and 4s4f configurations were derived from the semiempirically corrected transition energies. (C) 1994 Academic Press, Inc.