Schwinger critical field

Schwinger critical field

[¦shviŋ·ər ¦krid·ə·kəl ′fēld]
(electricity)
That electric field at which an electron is accelerated from rest to a velocity at which its kinetic energy equals its rest energy over a distance of one Compton wavelength.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.