gas-cell frequency standard

gas-cell frequency standard

[′gas ‚sel ′frē·kwən·sē ‚stan·dərd]
(atomic physics)
An atomic frequency standard in which the frequency-determining element is a gas cell containing rubidium, cesium, or sodium vapor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.