A modified Coulomb-Sturmian basis with finite-nucleus asymptotics reproduces reference values for six atomic properties and the Wichmann-Kroll vacuum polarization density in hydrogen-like ions.
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Sturmian basis set for the Dirac equation with finite nuclear size: Application to polarizability, Zeeman and hyperfine splitting, and vacuum polarization
A modified Coulomb-Sturmian basis with finite-nucleus asymptotics reproduces reference values for six atomic properties and the Wichmann-Kroll vacuum polarization density in hydrogen-like ions.