Energy dependence of CuL2,3satellites using synchrotron excited x-ray-emission spectroscopy

The $L_{2,3}$ x-ray emission of Cu metal has been measured using monochromatic synchrotron radiation. The self-absorption effect in the spectra is shown to be very small in our experimental geometry. From the quantitative analysis of spectra recorded at different excitation energies, the $L_3{/L}_2$ emission intensity ratio and the partial Auger width are extracted. High-energy satellite features on the $L_3$ emission line are separated by a subtraction procedure. The satellite intensity is found to be slowly increasing for excitation energies between the $L_3,$ $L_2,$ and $L_1$ core-level thresholds due to shake-up and shake-off transitions. As the excitation energy passes the $L_2$ threshold, a step of rapidly increasing satellite intensity of the $L_3$ emission is found due to additional Coster-Kronig processes.