The Hyperfine Structure Calculations of Some Excited Levels for La-139 I

Abstract

We calculated hyperfine structure constants of the 5d6s(2), 5d(2)6s, 5d(3), 5d(2)7s, 5d6s7s, 5d6p(2), 4f(2)5d, 4f6s6p, 5d6s6p, 5d(2)6p, 4f5d6s and 4f5d(2) levels for La-139 I (Z = 57). The calculations are based upon the multicorifiguration Hartree-Fock method within the framework of the Breit-Pauli relativistic corrections. Moreover, the results obtained were compared with other available calculations and experiments.