Origin of Cu and Zn $L_2$- and $L_3$-$M_{45}$$M_{45}$ Auger satellites: Breakdown of the sudden approximation

Initiating Auger transitions using tunable monochromatic x rays from synchrotron, we show that the satellite intensities in $L_2$ $M_{45}$ $M_{45}$ and $L_3$ $M_{45}$ $M_{45}$ spectra of Cu and Zn increase with increasing photon energies up to about 200 eV above the thresholds. This indicates a pronounced influence of the history of the core-hole generation on Auger spectra, in sharp contrast to the universally accepted belief, and suggests a breakdown of the sudden approximation. Details of the photon energy dependence of the satellite intensity provide a new interpretation for the origin of the satellite.