Uncertainty evaluation in activity measurements using ionization chambers

Details

Serval ID
serval:BIB_1019155A1852
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Uncertainty evaluation in activity measurements using ionization chambers
Journal
Metrologia
Author(s)
Amiot M.N., Chisté V., Fitzgerald R., Juget F., Michotte C., Pearce A., Ratel G., Zimmerman B.E.
ISSN
1681-7575 (Electronic)
ISSN-L
0026-1394 (Print)
Publication state
Published
Issued date
2015
Volume
52
Number
3
Pages
S108-S122
Language
english
Abstract
Pressurized re-entrant (or 4 pi) ionization chambers (ICs) connected to current-measuring electronics are used for activity measurements of photon emitting radionuclides and some beta emitters in the fields of metrology and nuclear medicine. As a secondary method, these instruments need to be calibrated with appropriate activity standards from primary or direct standardization. The use of these instruments over 50 years has been well described in numerous publications, such as the Monographie BIPM-4 and the special issue of Metrologia on radionuclide metrology (Ratel 2007 Metrologia 44 S7-16, Schrader1997 Activity Measurements With Ionization Chambers (Monographie BIPM-4) Schrader 2007 Metrologia 44 S53-66, Cox et al 2007 Measurement Modelling of the International Reference System (SIR) for Gamma-Emitting Radionuclides (Monographie BIPM-7)). The present work describes the principles of activity measurements, calibrations, and impurity corrections using pressurized ionization chambers in the first part and the uncertainty analysis illustrated with example uncertainty budgets from routine source-calibration as well as from an international reference system (SIR) measurement in the second part.
Keywords
ionization chambers, efficiency curve, Monte Carlo simulation, dose calibrator
Web of science
Create date
28/01/2016 7:51
Last modification date
20/08/2019 12:36
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