A comparative study of photoionization cross sections by using several atomic models

Abstract

Photoionization process is a subject of special importance in many areas of physics. Numerical methods must be used to obtain photoionization cross sections for non-hydrogenic levels. The atomic data required to calculate them is huge so self-consistent calculations increase computing time considerably. Analytical potentials are a useful alternative because they avoid the iterative procedures. In this work, we present a relativistic quantum calculation of photoionization cross sections. The atomic data are obtained by using analytical potentials, both for isolated and non-isolated ions. Comparisons between our results and others obtained using either analytical expressions for the cross sections or more sophisticated calculations are done. Finally, plasma effects on cross section are evaluated.