EXTREME-ULTRAVIOLET SPECTRUM OF NE-III

The spectrum of neon in the extreme-ultraviolet region has been studie d in Penning discharge sources. New transitions are identified in the doubly ionized Ne III spectrum below 250 Angstrom. Twenty multiplets o f the 1s(2)2s(2)2p(4)-1s(2)2s(2)2p(3)nl transitions for n = 3, 4, 5 ha ve been classified, based on precise energy levels established in a re cent study at higher wavelengths. Several new classifications in Ne II are also suggested. (C) 1997 Optical Society of America.