THE K–LL AUGER SPECTRUM OF 66Dy161

The K–LL Auger spectrum of 66Dy161 has been studied using the Chalk River iron-free β-ray spectrometer at an instrumental resolution of ~0.07%. After correcting for the estimated intensity of the L3 43.81-kev conversion line (96% M1 + 4% E2), which coincides with the second (K–L1L2) Auger line, the following energies and intensities are obtained for the seven Auger lines:The energies are from 20 to 50 ev higher than the non-relativistic predictions. The relative intensities are consistent with experimental results at other atomic numbers.