Description
Title: Selenium’s Ka and Kb Emission X-ray Spectra’s Basic Parameters
Abstract: Based on the Multiconfiguration Dirac-Fock method, we present relativistic ab initio calculations of the fundamental parameters for atomic selenium. Fluorescence yields, K shell subshell linewidths, and Kb/Ka intensity ratios are provided in detail, demonstrating overall agreement with both theoretical calculations and experimental results. A statistical distribution of these initial states was produced by evaluating relative intensities while assuming the same ionization cross-section for the K-shell hole states. It is suggested to use a method for calculating the theoretical linewidths of X-ray lines where the lines are made up of multiplets of fine-structure levels with varying energies. Compared to the conventional method, this method yields results that are closer to the experimental width values for the Ka1,2 line, though the Kb1,3 lines show slightly higher discrepancies. This points to some errors in the estimation of Auger rates, which contribute more when partial linewidths of the subshells involved in the Kb1,3 profile are taken into account. In addition, the calculated Kb to Ka intensity ratio, which is less susceptible to Auger rate problems, is in excellent agreement with suggested values.
Keywords: X-rays; atomic fundamental parameters; selenium; fluorescence yields; high-accuracy spectra simulation
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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