Behavior of linewidths in resonant Auger and cascade Auger processes

We study the linewidths in cascade Auger spectra in synchrotron radiation experiments and discuss their dependence on the lifetimes of the discrete states and the experimental conditions. In particular we consider the possibility of manipulating the linewidths of the first step decay by tuning the bandwidth of the incoming photons. This may be used as an identification method in cases where the spectra from different decays are energetically overlapping. As an example we take the cascade process in Xe following the 4d(5/2) --> 6p resonant excitation.