The comparison of theory and experiment for energy levels of strongly bound electrons
provides a critical test of quantum electrodynamics in strong fields. A theoretical evaluation …

Actinides are the heaviest chemical elements with practical relevance. Among them, only
thorium and uranium can be found in nature in substantial quantities, while natural …

Removal energies and hyperfine constants of the lowest four ns, np 1/2, and np 3/2 states in
Na, K, Rb, and Cs are calculated; removal energies of the n= 7–10 states and hyperfine …

An ab initio method for high accuracy calculations for atoms with more than one valence
electron is described. The effective Hamiltonian for the valence electrons is formed using …

A density-functional theory that treats all states of an electronic system on the same footing is
introduced. The corresponding Kohn-Sham formalism can be applied to ground and excited …

Two-component and scalar relativistic energy-consistent pseudopotentials for the group 1
elements from K to element 119 are presented using nine electrons for the valence space …

Systematic study of Rb atomic properties is carried out using a high-precision relativistic all-
order method. Excitation energies of the ns, np, nd, and nf (n⩽ 10) states in neutral rubidium …

We compile a 109-membered benchmark set of adiabatic excitation energies (AEEs) from
high-resolution gas-phase experiments. Our data set includes a variety of organic …

We discuss results of the most accurate to-date test of the low-energy electroweak sector of
the standard model of elementary particles. Combining previous measurements with our …

High-accuracy calculations of atomic properties of the superheavy elements (SHE) up to
element 122 are reviewed. The properties discussed include ionization potentials, electron …