L2- andL3-Subshell Fluorescence Yields forZ>37

The relativistic calculation of radiative widths for $K$ shell and $L$ subshells, as reported by Scofield, are in agreement (within 0.1%) with our independent calculations. Theoretical total $K$-shell widths (x ray + Auger) are presented as a function of the atomic number. Using the experimental widths of $K{\alpha }_1$ and $K{\alpha }_2$ and our theoretical results, calculated $L_2$- and $L_3$-subshell fluorescence yields are presented versus atomic number.