Fermi transition

Fermi transition

[′fer·mē tran′zish·ən]
(nuclear physics)
Beta decay subject to Fermi selection rules.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Currently, the most accurate value of the matrix element [V.sub.ud] is obtained from the measurement of nuclear Fermi transitions in [0.sup.+] [right arrow] [0.sup.+] nuclear [beta]-decay.