Energy and angular distributions of electrons ejected from autoionization states in neon by electron impact

Abstract

The energy and angular distributions of electrons ejected from autoionization states in neon have been observed by electron impact. The energies of the primary electrons are 50-1000 eV. The resonance peaks due to electrons ejected from the inner-shell excited states (2s2p6ns)1S, have been clearly observed over the wide range of incident energy and ejection angle, whereas the peaks due to (2s2p6np)1P state become evident as the impact energy is decreased below approximately 100 eV. The resonance peak due to the doubly excited states e.g., (2p43snp)1P, have not been evident. The line shapes of the resonance peaks are almost symmetric.