A new observation method of ion-electron emission

The energy spectra of secondary electrons emitted from a molybdenum target in the shape of a wire upon bombardment with 5 keV He⁺ ions is examined. It is shown that for the grazing angleof ion incidence the structure of the energy spectrum is most sensitive to the target treatment. At such a geometry the ion-electron emission can be used for analysis of the solid surface covered by adsorbed or contaminant particles.