Affiliation:
1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
2. State Key Laboratory of NBC Protection for Civilian, Beijing, China
3. National Institute of Metrology (NIM), Beijing, China
Abstract
Abstract
An intercomparison experiment of three radon progeny measurement methods, based on alpha spectrometry (Kerr method), alpha–beta spectrometry and liquid scintillation counter (LSC method), was carried out in the standard radon chamber at NIM. Both the consistency and the uncertainty analysis of three different methods were studied in detail. Results show that, at the EEC level of 4000 Bq/m3, the uncertainties of the alpha–beta spectrometry, LSC method and Kerr method were 3.78%, 6.41% and 9.46%, respectively, which are mainly contributed by detection efficiency uncertainty, measuring time uncertainty and counting statistical uncertainty in sequence. The comparison results at different concentration levels show that the measurement values of three methods are consistent within the error range of 3%. The alpha–beta spectrometry can be used as a reference standard method to achieve the simultaneous measurement of RaA, RaB, RaC concentrations and EEC in the radon chamber.
Funder
National Natural Science Foundation of China
Publisher
Oxford University Press (OUP)
Subject
Public Health, Environmental and Occupational Health,Radiology, Nuclear Medicine and imaging,General Medicine,Radiation,Radiological and Ultrasound Technology