Erratum: Inner-shell promotions in low-energy Li+-Al collisions at clean and alkali-covered Al(100) surfaces

Abstract

Spectra of scattered ions and ion-induced electron emissions are used to investigate the electronic processes that occur during 0.4--5.0-keV Li[sup +] bombardment of clean and alkali-atom-covered Al(100). The results show that Li 1[ital s] electrons are promoted during hard Li-Al collisions, but not during Li-K or Li-Na collisions. Consequences of the inner-shell electron promotions are evident in the inelastic loss, neutralization behavior, and electron emissions of the scattered Li particles. Spectra of scattered Li[sup +] ions exhibit discrete-loss features, which are resistant to the usual increase in resonant neutralization that accompanies the deposition of alkali atoms on the surface. The loss features are due to Li 1[ital s] excitation via electron promotion, while the production of ions away from the surface via autoionization is responsible for their lack of response to alkali-atom adsorption. Spectra of ion-induced electron emissions confirm that Li[sup *](1[ital s]2[ital s][sup 2]) is produced and that it undergoes autoionization.