CopperM1VVAuger line shape

Abstract

The copper $M_1\mathrm{VV}$ Auger line shape, experimentally shown to contain both bandlike and atomiclike features, is analyzed. It is found that the atomiclike part arises from decays resulting in the creation of two $d$-like final-state holes, while the bandlike portion arises from the creation of one $s$-like and one $d$-like hole. The relative intensity of the two processes agrees well with theoretical predictions which also explain why the $s-d$ process is not visible in the $L_{2,3}\mathrm{VV}$ or $M_{2,3}\mathrm{VV}$ spectra. In addition, this analysis shows that it is likely that the polarization charge, screening the initial-state $M_1$ hole, appreciably affects the relative Auger amplitudes.