Photoionization of Xe and Rn from the relativistic random-phase theory

Photoionization cross section ${\sigma }_{n\kappa }$, asymmetry parameter ${\beta }_{n\kappa }$, and polarization parameters ${\xi }_{n\kappa }$, ${\eta }_{n\kappa }$, ${\zeta }_{n\kappa }$ of Xe and Rn are calculated in the fully relativistic formalism. To deal with the relativistic and correlation effects, we adopt the relativistic random-phase theory with channel couplings among different subshells. Energy ranges for giant \emph{d}-resonance regions are especially considered.