Coincidence summing in gamma-ray spectroscopy

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:387221

Semkow, T M; Mehmood, G; Parekh, P P ^[1]

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1. and others

With a proliferation of highly efficient Ge detector the effect of coincidence summing deserves a new approach. The coincidence summing of {gamma} radiation occurs when two or more {gamma} rays are emitted in coincidence from the decay of the same nucleus, and are recorded as one pulse within the resolving time of a Ge detector. We present a new technique developed to calculate coincidence-summing corrections. The general coincidence-summing equations are derived in matrix notation, which allows extracting either the lst-order correction (combinations of only two coincident {gamma} rays) or a full correction (all possible combinations of emitted {gamma} rays). It is shown how the technique can be applied to the determination of source disintegration rate, {gamma}-ray emission rates (alternatively in-beam reaction rates), or peak efficiencies in the presence of coincidence summing. Our technique has been applied to the determination of peak efficiencies of a Ge detector. The above calculation showed that, in general, the full correction is necessary for complicated decay schemes such as that from {sup 154}Eu.

• OSTI ID: 387221
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
COINCIDENCE METHODS
GAMMA SPECTROSCOPY
GE SEMICONDUCTOR DETECTORS