Screening effects in theKLVAuger spectra of Na, Mg, Al, and Si

Abstract

X-ray excited $K{L}_{1}V$ and $K{L}_{2,3}V$ Auger spectra of clean Na, Mg, Al, and Si are presented. The influence of core holes on the shape of the valence band is made evident by comparison with x-ray photoelectron spectroscopy and x-ray emission spectra. It is shown that such Auger spectra give experimental evidence on the local and symmetry-selected density of states around a core hole. The local density of $s$ states is more affected by core ionization than the local density of $p$ states.