Carbon K-shell excitation in acetone by 2.5 keV electron impact

The energy loss spectrum of 2.5 keV electrons, scattered by gaseous acetone through small angles, has been obtained in the region of the carbon K-edges. Discrete structure observed below the ionization threshold is interpreted as arising from the promotion of a carbon K-shell electron to Rydberg orbitals. Broad peaks observed above the K-edges are associated with the simultaneous transitions of a carbon K-shell and valence shell electrons (shake-up and shake-off processes).