Abstract
The parameters that determine the nondipole corrections to the photoelectron angular distribution have been investigated for the and p-subshells of the noble-gas atoms through comparing results calculated in the Hartree-Fock (HF) approximation and taking into account multielectron correlations, using the random-phase approximation with exchange. Our results cover the photoelectron energy range from the photoionization thresholds to 1.6 keV. We find the interesting result that near the photoionization thresholds these parameters are generally characterized by an oscillatory behavior as a function of exclusive of the parameter for the He subshell. These oscillations are sensitive to multielectron correlations, except those of the Ar subshell. This finding supports once more that the photoprocesses in these atomic subshells are of a collective character. We conclude that their correct description cannot be achieved within the framework of a one-electron approximation such as the HF approximation. Results are presented and discussed.
- Received 20 September 2000
DOI:https://doi.org/10.1103/PhysRevA.63.052506
©2001 American Physical Society