LOW-ENERGY AUGER-ELECTRON EMISSION FROM TITANIUM INDUCED BY ION-BOMBARDMENT

Measurements are reported of the low-energy electron emission spectrum from a solid titanium target bombarded with Ar and Kr ions with energ ies in the range 2 keV to 5 keV. The ion-induced electron spectrum sho ws considerable structure which is not present in electron-beam-excite d spectra. The ion-induced spectrum is interpreted as arising from ato ms sputtered free of the surface in excited states. However, compariso n with the free-atom electron spectrum shows both similarities and sig nificant differences. Possible excitation processes are discussed and tentative labels assigned to the observed peaks.