Double Auger Decay following K-Shell Photoionization of Neon

Using a COLTRIMS setup at LBNL-ASL, our group photoionized Neon just above the K-ionization threshold. The measurement allows us to investigate a simultaneous angular and energy correlation between the three continuum electrons of the subsequent double Auger decay pathway: \begin{center} Ne(1s$^{-1})^{+}$ + e$^{-}_{photo }\to $ Ne$^{3+}$ + e$^{-}_{photo}$ + e$^{-}_{Auger}$ + e$^{-}_{Auger}$, \end{center} where we measure two of the electrons directly and infer the momentum of the third through momentum conservation of the four-particle final state. Analysis is underway to better understand the k-hole relaxation process following photo-ionization and successive Auger decay(s).