Manifestations of Collective Properties of the Degenerate Electron Gas in the (e,2e) Quasielastic Knockout Process

It is shown that quasielastic knockout ($e,2e$) of electron by a fast electron from a thin solid film presents direct information about both the $\overrightarrow{\mathrm{k}}$ and $\omega$ dependence of the single-particle, spectral-weight function $A(\overrightarrow{\mathrm{k}},\omega )$ of target electrons. We discuss the expected manifestation of Mahan-Nozières edges and their plasmon satellites in an ($e,2e$) experiment side by side with that of plasmaron hole states.