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Updated: Jul 19, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
Published on: February 1, 2016
An anti-cosmic β-γ coincidence system for radioxenon measurement
Qi Li1, YuanQing Fan1, ShiLian Wang1
1CTBT Beijing National Data Centre and Beijing Radionuclide Laboratory, Beijing, 100085, China.
Abstract:
A β-γ coincidence system for radioxenon measurement with high detection sensitivity has been developed in Beijing Radionuclide Laboratory by using a broad energy germanium γ-detector and a plastic scintillator β-detector. In order to further improve the performance of the system, a cosmic-ray veto detector system has been implemented to reduce the background induced by cosmic-ray muon. This paper reports on the setup and commissioning of the anti-cosmic β-γ coincidence system. In a 24-h measurement of the system, the Minimum Detectable Activity (MDA) for 131mXe, 133mXe, 133Xe and 135Xe have been estimated to be 0.9 mBq, 1.1 mBq, 2.2 mBq and 2.1 mBq respectively.
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