ISSN:
1588-2780
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract This work presents a low-level background gamma spectrometry system capable of achieving rapid determination of90Sr without chemical separation, in a soil sample when the90Sr to γ-ray emitting nuclide concentration ratio exceeds 10. The system consists of a highly efficient HPGe central detector operated in coincidence or anticoincidence with a NaI(Tl) guard detector and a NaI(Tl) backscatter detector. Experimental results indicate that the bremstrahlung radiation from a pure β-emitter can be distinguished with respect to the differences in normal and coincidence spectra. The90Sr activity can be directly detemined in the sample in less than 1 hour with a minimum detectable concentration (MDC) estimated at 0.002 Bq·g−1 for a sample containing no appreciable γ-ray nuclides or other high energy, β-emitting nuclides. In actual measurement, a 0.06 Bq·g−1 MDC for contaminated soils is achieved.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02223377
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