Correlation potential method for the calculation of energy levels, hyperfine structure and E1 transition amplitudes in atoms with one unpaired electron

Energy levels, fine and hyperfine structure, as well as E1 transition amplitudes in thallium and gold, are calculated. Application of the relativistic Hartree-Fock equations, taking into account electron shell polarisation and correlation corrections to the wavefunction, provides an accuracy of the order of a few per cent as a rule. This is an order of magnitude better than the accuracy of simple Hartree-Fock calculations. An estimate for structural radiation is made.