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

TL;DR

This paper presents relativistic calculations of photoionization properties of xenon and radon, including cross sections and polarization parameters, using a sophisticated many-body theory to account for relativistic and correlation effects.

Contribution

It introduces a fully relativistic random-phase approach with channel couplings to accurately compute photoionization parameters for Xe and Rn.

Findings

Accurate cross sections and polarization parameters for Xe and Rn.

Identification of giant d-resonance regions.

Enhanced understanding of relativistic and correlation effects in heavy noble gases.

Abstract

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.