double beta decay

(redirected from Double beta minus decay)

double beta decay

[¦dəb·əl ¦bād·ə di′kā]
(nuclear physics)
A nuclear transformation in which the atomic number changes by 2 and the mass number does not change; either two electrons are emitted or two orbital electrons are captured.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.