Xenon 4p photoionization near the 4d Cooper minimum: Interchannel coupling effects.

Abstract

Recently, results of photoemission measurements for xenon were reported in the photon energy range 160 to 270 eV. These time-of-flight studies performed by Lindle et al. [Phys. Rev. A 37, 3808 (1988)] at the Stanford Synchrotron Radiation Laboratory suggested that photoemission from the Xe 4p subshell is remarkably influenced by photoionization channels from the 4d subshell. In the present study, calculations in the relativistic random-phase approximation have been made in which we have included interchannel coupling between dipole photoionization channels from the 4p and 4d subshells. The effect of this interchannel coupling is perceptible in the results for 4p photoionization.