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VOLUME 28 (1978) | ISSUE 5 | PAGE 308
Observation of a long-lived autoionization state in the spectrum of the gadolinium atom
An autoionization state with a lifetime 0.5 nsec was observed for the first time ever in selective three-step ionization of gadolinium atoms by radiation from pulsed dye lasers. A value / = 49 598 ±5 cm'1 was obtained for the ionization energy of the gadolinium atom.