low-energy positron diffraction
Also found in: Acronyms.
low-energy positron diffraction[′lō ‚en·ər·jē ′päz·ə‚trän di‚frak·shən]
A technique for studying the atomic structure of solid surfaces in which a narrow beam of low-energy monoenergetic positrons is made to strike a solid surface, and the diffracted beams in certain directions that are permitted by the regular array of surface atoms are observed. Abbreviated LEPD.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.