Relativistic Effects in the Photoionization of High-ZElements: Splittings and Shifts of Minima

Zeros in dipole matrix elements for high-Z elements are found to occur at significantly higher energies in our relativistic calculations than in nonrelativistic results. The energy separations of the zeros of the relativistic matrix elements are substantially magnified (a factor of {} 10) compared to the initial bound-state spin-orbit splitting.