APPARATUS FOR ROUTINE QUANTITATIVE ESTIMATION OF RADIONUCLIDES BY $gamma$- SCINTILLATION SPECTROMETRY
Technical Report
·
OSTI ID:4241473
A NaI(Tl) scintillation spectrometer designed for the routine quantitative estimation of gamma -emitting nuclides is described. Standard commercially canned Nal(Tl) crystals are employed. The selection of crystals, photomultipliers, radiation shields, and beta absorber, is discussed. Details for the construction of scintillation units, radiation shields, source mounts, and source positioners, are given. The calibration of a 1 1/2'' x 1'' and a 3'' x 3''(bevelled) Nal(Tl) scintillation detector is described. Experimentally determined photopeak efficiencies for those crystals are presented as a function of photon energy and source to crystal distance. Overall efficiency factors for a number of specific nuclides are given as a function of source mounts source to crystal distances and bias level. (auth)
- Research Organization:
- Atomic Energy of Canada Ltd., Chalk River, Ont.
- NSA Number:
- NSA-13-015268
- OSTI ID:
- 4241473
- Report Number(s):
- CRDC-847; AECL-819
- Country of Publication:
- Canada
- Language:
- English
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