Calculation of Coster-Kronig Enhancement Factors and L Subshell X-Ray Fluorescence Cross-Sections for 55Cs

Abstract

X-Ray fluorescence cross-sections (

sLi, i = a‚ b‚ l , g) of the 55Cs element were calculated theoretically at excitation energies for each Li (i = 1, 2 and 3) subshell, respectively. Coster-Kronig transitions (f12, f23 and f13) are non-radiative transitions in which an inner shell vacancy is transferred from one subshell of an atom to another. The increase in L X-ray intensity due to the effect the Coster-Kronig transitions on L X-ray fluorescence cross sections were calculated theoretically. These calculated values were compared with other experimental and theoretical values. Calculations showed that the alteration in absolute intensities of La and Ll lines arising from Coster-Kronig transitions are greater than that of Lb.