Autoionizing levels in neon excited by low-energy heavy-ion impact

Energy spectra of electrons ejected from autoionizing states in neon, excited in 0.5-15 keV Ne + -He, He + -Ne, Li + -Ne, Na + -Ne and Mg + -Ne collisions have been measured. Due to quasi-molecular effects spectral features from the autoionizing configurations 1s 2 2s 2 2p 4 nln'l' are preferentially excited. 13 lines in the region 20-30 eV are reported. Their assignments to specific levels are discussed and the need for theoretical calculations is pointed out.