Abstract
Calculations of the photoionization of $5d$ and $4f$ subshells of a number of heavy elements have been performed with use of relativistic Dirac-Slater wave functions. Cross sections, branching ratios, and photoelectron angular distributions have been obtained and their systematics explored as a function of $Z$. The extent of the relativistic splitting of the zeros in the $5d\ensuremath{\rightarrow}\ensuremath{\epsilon}f$ dipole matrix elements has been investigated and the implications have been discussed. Comparisons with existing experiment and more sophisticated theory (Dirac-Fock, relativistic random-phase approximation) have been made, and the agreement was generally good.
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