Recent developments in frequency metrology and optical clocks have been based on
electronic transitions in atoms and singly charged ions as references. The control over all …

Multiconfiguration wave function expansions combined with configuration interaction
methods are a method of choice for complex atoms where atomic state functions are …

Optical atomic clocks are the most accurate measurement devices ever constructed and
have found many applications in fundamental science and technology,–. The use of highly …

Mendeleev's introduction of the periodic table of elements is one of the most important
milestones in the history of chemistry, as it brought order into the known chemical and …

Computational atomic physics continues to play a crucial role in both increasing the
understanding of fundamental physics (eg, quantum electrodynamics and correlation) and …

Relativistic quantum chemistry has evolved into a fertile and large field and is now becoming
an integrated part of mainstream chemistry. Yet, given the much-involved physics and …

We report the implementation of effective quantum electrodynamics (QED) potentials for all-
electron four-component relativistic molecular calculations using the DIRAC code. The …

One of the most important properties influencing the chemical behavior of an element is the
electron affinity (EA). Among the remaining elements with unknown EA is astatine, where …

The chemical properties of an element are primarily governed by the configuration of
electrons in the valence shell. Relativistic effects influence the electronic structure of heavy …

We review the progress in atomic structure theory with a focus on superheavy elements and
their predicted ground state configurations important for an element's placement in the …