Electron and core-hole dynamics probed by Auger electron spectroscopy

Ikeura, Hiromi*; Sekiguchi, Tetsuhiro  

Femo and atto second electron dynamics through unoccupied conduction band in organic electronic materials can be probed by Auger spectroscopy (RAS). In this method, RAS spectra are interpreted based on two competing decay channels: core-hole decay and core-excited resonant electron delocalization. Recent progress in our understanding of previous data, we found that maximum energies in P K-edge X-ray absorption spectra (XAS) measured by Auger electron yields are different between spectator Auger (SA) and normal Auger (NA) for phosphate groups in DNA and nucleotides. This can be explained by core excitation binding energy shifts for the localized state corresponding to SA.