primary knocked-on atom
primary knocked-on atom
[′prī‚mer·ē ¦näkt ‚ȯn ′ad·əm] (physics)
An atom in a solid that recoils from a collision with an energetic particle coming from outside the solid, rather than with another knocked-on atom. Abbreviated PKA.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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