Relativistic Calculations for Photoionization Cross Sections and the Spin Orientation of Photoejected Electrons from Potassium, Rubidium, and Cesium Atoms

By using relativistic Hartree-Fock equations which automatically take the spin-orbit interaction into account, we calculate the single-particle states for photoejected electrons from heavy alkali-metal atoms. We derive an expression for the perturbation function x. Our results are in fair agreement with the experiments, but more accurate calculations including electron correlations are desirable.