Fundamental Parameters Related to Selenium Kα and Kβ Emission X-ray Spectra

We present relativistic ab initio calculations of fundamental parameters for atomic selenium, based on the Multiconfiguration Dirac-Fock method. In detail, fluorescence yields and subshell linewidths, both K shell, as well Kβ to Kα intensity ratio are provided, showing overall agreement with previous theoretical experimental values. Relative intensities were evaluated assuming same ionization cross-section K-shell hole states, leading a statistical distribution these initial states. A method estimating linewidths X-ray lines, where lines composed by multiplet fine-structure levels that spread in energy, is proposed. This provides results closer Kα1,2 width values than usual method, although slightly higher discrepancies occur Kβ1,3 lines. indicates some inaccuracies calculation Auger rates have contribution partial subshells involved profile. Apart from this, calculated value ratio, which less sensitive issues, excellent recommended