Synchrotron-radiation study of the satellites in Ni $L_3$-$M_4$,5${\mathrm{M}}_4$,5 Auger spectra

The Ni $L_3$-$M_4$,5${\mathrm{M}}_4$,5 Auger spectrum is shown to be free of any satellite structure when the ionizing photon energy is close to the ionization threshold. Making use of this observation, we extract the exact line shape of the satellite features appearing with higher ionizing energies. The dependence of the intensities of different features in the satellite reveals two distinctly different kinds of satellite structure to be present. The origin of these satellites is discussed.