ELECTRON-EMISSION IN COLLISIONS OF SLOW RARE-GAS IONS WITH PARTIALLY CESIATED W(110)

We report the spectra of electrons emitted after slow collisions (50 e V) of rare gas ions (He+, Ne+, Ar+, and Xe+) with partially cesiated W (110) surfaces. The electron spectra are discussed in terms of the two interatomic Auger processes, Auger Capture and Auger Deexcitation and the intra-atomic Auger process, Autodetachment of Rg-(He-*(1s2s2(2)S ) in the case of He).Model calculations including these processes can qualitatively reproduce the, measured spectra as well as experimental values for the electron emission coefficients, gamma. This is demonstr ated for collisions of He+ ions and thermal metastable He atoms with c lean and partially cesiated W(110).