Ionization potentials and electron affinities of Rg, Cn, Nh, and Fl superheavy elements
M. Y. Kaygorodov, Д. П. Усов, Ephraim Eliav, Y. S. Kozhedub, A. V. Malyshev, Alexander V. Oleynichenko, В. М. Шабаев, L. V. Skripnikov, А. В. Титов, I. I. Tupitsyn, Andréi Zaitsevskii
Abstract
The successive ionization potentials (IPs) and electron affinities (EAs) for superheavy elements with $111\ensuremath{\le}Z\ensuremath{\le}114$, namely, Rg, Cn, Nh, and Fl, are reexamined using the relativistic Fock-space coupled-cluster method with nonperturbative single (S), double (D), and triple (T) cluster amplitudes (FS-CCSDT). For most of the considered quantities, the triple-amplitude contributions turn out to be important. The Breit and frequency-dependent Breit corrections are evaluated by means of the configuration-interaction method. The quantum-electrodynamics corrections to the IPs and EAs are taken into account within the model-QED-operator approach. The obtained results are within 0.10 eV uncertainty.