Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8208837 | Applied Radiation and Isotopes | 2018 | 18 Pages |
Abstract
A defined solid angle counting apparatus for radon-222 activity absolute measurement is presented. Two home-made vacuum sealed radium-226 sources with radioactivity of 500Â kBq and 3MBq are used to minimize the impact from gas impurities. The defined solid angle is calculated using precisely measured geometrical parameters by several algorithms. The result from Monte Carlo simulation agrees with results obtained by other methods within the estimated uncertainty limit. Alpha particle's scattering behavior in the measurement chamber and collimator is simulated by the geant4 code and a total scattering alpha particle ratio of 0.23% as well as a relative uncertainty contribution to activity measurement of 0.02% to 0.09% are estimated. A typical total combined standard uncertainty of 0.28% is evaluated for the radon activity primary measurement.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Juncheng Liang, Zhijie Yang, Liyuan Wang, Zexi Li, Ming Zhang, Haoran Liu, Daqing Yuan,