Autoionizing emission from 3p⁵3dⁿ⁺¹4s²states of Ca, Sc, Ti and V, excited by ion impact on solid targets

Abstract

Electron emission spectra of metallic Ca, Sc, Ti and V excited by rare-gas-ion bombardment are presented. The spectra display distinctive atomic characteristics as well as solid-state structure due to M23VV Auger emissions. By energy considerations, we show that their main spectral features can be explained by atomic autoionizations of the excited metal atoms in 3p53dn+14s2 states with excitation energies less than the solid-state 3p ionization energy. The relative importance of the autoionization channels M23N1N1, M23M45N1 and M23M45M45 is investigated by comparing theoretically calculated spectra with the experimental spectra. Our work suggests that M23M45N1 transitions rather than super-Coster-Kronig M23M45M45 transitions dominate the decay channels.

Neutralization phenomena observed with secondary ions originating from inner‐shell excitation

“…Turning to the results for Ti 2+ in Fig. 2, we first note that, according to ion-induced Auger spectra observed at impact energies between 5 and 15 keV, [33,34] the production of Ti 2+ ions must be attributed to M 2,3 inner-shell excitation. The large difference between the Ti 2+ spectrum in Fig.…”

Contribution of singly and doubly ionized argon to the autoionization (Auger) spectrum of argon excited by bombardment of magnesium and scandium surfaces

“…We have recently completed systematic measurements of the collisionally excited electron spectra from elements Ca-V [9] and found measurable electron spectra from the bombarding ions Ne, Ar and Kr. This paper reports the results of a detailed study of the electron spectrum of Ar obtained from Mg and Sc targets in an attempt to understand in more detail the origin of such spectra.…”