Uncertainty evaluation in activity measurements using ionization chambers

Published

May 22, 2015

Author(s)

Marie Noelle Amiot, V Chiste, Ryan P. Fitzgerald, F Juget, Carine Michotte, Andrew Pearce, G Ratel

Abstract

Pressurized re-entrant (or 4π) pressurized ionization chambers (ICs) connected to current- measuring electronics are used for activity measurements of photon emitting radionuclides and some beta emitters in the field of metrology and nuclear medicine. As a secondary method, these instrument need to be calibrated with appropriate activity standards from primary or direct standardization. Being used over 50 years the way of measurement and bibliography is well described in numerous publications as the Monographie BIPM- 4 and in the special issue of Metrologia on radionuclide metrology for instance [8, 13, 29, 46]. The work presented here, describes the principles of activity measurements, calibration and impurity corrections using pressurized ionization chambers in the first part and the uncertainty analysis illustrated with a budget of uncertainty in the frame of the SIR in the second part.

Citation

Metrologia

Volume

52

Issue

2015

Pub Type

Journals

Keywords

Ionization chamber, Efficiency curve, Monte Carlo simulation, dose calibrator

Citation

Amiot, M. , Chiste, V. , Fitzgerald, R. , Juget, F. , Michotte, C. , Pearce, A. and Ratel, G. (2015), Uncertainty evaluation in activity measurements using ionization chambers, Metrologia (Accessed March 13, 2025)