Abstract

An account is given of an anticoincidence ring of plastic scintillator designed to fit round a 5 in. by 4 in. NaI crystal used as detector in a "whole-body counter". Results presented show that this system can produce a marked diminution of the background and that it can be usefully used to attenuate spectra of nuclides emitting gamma rays in cascade, thus helping in the analysis of complex spectra.

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