Measurements of the L-shell fluorescence yields of Ar and Cl by electron impact

Abstract

L-shell X-ray emission cross sections have been measured for 1 keV electron impact on Ar, HCl and Cl2. The fluorescence yields derived from these cross sections and known Auger emission cross sections are significantly smaller than results of recent theoretical calculations of the fluorescence yields for configurations with more than one open shell. This indicates that the assumption of statistical population of the initial spectroscopic terms when calculating mean fluorescence yields is invalid.