Advanced theoretical techniques that combine the linearized coupled-cluster method, configuration-interaction method, and perturbation theory are used to calculate energy levels, ionization potentials, electron affinities, field isotope shifts, and static dipole polarizabilities of the superheavy elements Lv and Ts, along with their lighter analogs Te, I, Po, and At. Calculations for the heavy elements, Po, At, Lv, and Ts, are used to address the gaps in the experimental data. Calculations for the lighter elements, Te and I (and partly Po and At), are used to demonstrate the accuracy of the calculations.

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• Atomic & molecular structure
• Atomic spectra
• Electronic structure of atoms & molecules
• Electronic structure
• First-principles calculations