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Hollow Atoms (discovered in 1990 by a French team of researchers around Jean-Pierre Briand) are short-lived multiply-excited neutral atoms which carry a large part of their Z electrons (Z ... projectile nuclear charge) in high-n levels while inner shells remain (transiently) empty. This population inversion arises for typically 100 femtoseconds during the interaction of a slow highly charged ion (HCI) with a solid surface.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hollow_atoms". A list of authors is available in Wikipedia.|