K-Shell Double Photoionization Cross Section of (Be, Mg and Ca) Atoms

Abstract

Abstract:Double photoionization cross sections has been calculated using Hartree-Dirac-Slater method for Be, Caand Mg atoms, the result were compared with Colgan et.al and Kheifets et.al theoretical data. Experimentalmeasurements of photoioniztion cross sections was not available in order to make a comparison with ourcalculations. In general our results of the photoionization cross sections gave a good match with thetheoretical data that compared with for Be and Ca atoms specially at high energies, and the same behaviorfor Mg atom but with no matching.