Fine- and hyperfine structure investigations of the odd-parity configuration system in atomic holmium

Abstract

In this work a parametric study of the fine (fs) and the hyperfine structure (hfs) for the odd-parity level system in the holmium atom (Ho I) is presented. A large amount of new experimental data, published in the last three years, have been considered for the fs and hfs semi-empirical analysis. Multiconfiguration calculations, both for the fine and the hyperfine structure, for 11 configurations with all the 4fN core states, by taking into account the second-order of perturbation theory, have been performed for the first time. Predicted values of level energies as well as magnetic dipole and electric quadrupole A and B hfs constants are listed. These values are of special interest if no experimental values are available. Some important information concerning the electronic structure of the holmium atom for further calculations of elements with open 4f electronic shell has been achieved.