suppression shield

suppression shield

[sə′presh·ən ‚shēld]
(nucleonics)
An array of high-efficiency, low-resolution gamma-ray detectors that surround a high-resolution gamma-ray detector and detect the background of gamma rays which is Compton scattered out of the germanium crystal, in order that these gamma rays may be excluded from the measurement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.