Improved many-body perturbation theory calculations of then=2states of lithiumlike uranium

Abstract

A recent calculation of the spectrum of the n=2 states of lithiumlike uranium is improved by a more accurate treatment of the effect of finite nuclear size and a more complete calculation of higher-order corrections to Breit and mass-polarization contributions. Predictions for the 2$s_{1/2}$-2$p_{1/2}$ and 2$p_{1/2}$-2$p_{3/2}$ splittings, incorporating a phenomenological treatment of radiative corrections, are presented.