Use of 155Eu in the Measurement of Gd L Subshell Yields

Abstract

The subshell fluorescence yields ω2 and ω3 and the Coster–Kronig yield f23 have been measured for Gd by the method of coincidence study of the X rays emitted by 155Eu.The result is ω2 = 0.182 ± 0.008, ω3 = 0.187 ± 0.006, and f23 = 0.223 ± 0.011. The values for ω2 and ω3 are close to theoretical predictions and to the experimental results of other workers on the neighboring element Tb. However, there is serious disagreement in the f23 values.