Relativistic calculations of K-shell photoionization cross-sections for 16 𝟑�𝟐� 𝐒� at 59.6 keV excitation energy

Abstract

In this work we calculate photoionization X-ray cross-sections of K-shell vacancies in S at incident photon energy of 59.6 keV using the Dirac-Fock method and the MCDFGME (Multi Configuration Dirac Fock and General Matrix Element) code [1-3]. Calculations are performed in single configuration approach with the Breit interaction. Higher-order retardation corrections and QED effects were also included as perturbations. Fluorescence yield necessary to derive the X-ray production cross section (XPCS) were obtained in a previous work using the exact same approach. The obtained results are compared to existing theoretical and experimental results