A calibration procedure for beta-gamma coincidence detector-systems using four radioxenon spikes

Boxue Liu; Richard Britton; Seokryung Yoon; Ashley Vaughan Davies; Nikolaus Hermanspahn; Herbert Gohla; Jonathan Baré; Martin Kalinowski

doi:10.1016/j.apradiso.2024.111186

A calibration procedure for beta-gamma coincidence detector-systems using four radioxenon spikes

Appl Radiat Isot. 2024 Mar:205:111186. doi: 10.1016/j.apradiso.2024.111186. Epub 2024 Jan 10.

Authors

Boxue Liu¹, Richard Britton², Seokryung Yoon², Ashley Vaughan Davies², Nikolaus Hermanspahn², Herbert Gohla², Jonathan Baré², Martin Kalinowski²

Affiliations

¹ CTBTO, P.O. Box 1200, 1400, Vienna, Austria. Electronic address: boxue.liu@ctbto.org.
² CTBTO, P.O. Box 1200, 1400, Vienna, Austria.

PMID: 38224647
DOI: 10.1016/j.apradiso.2024.111186

Abstract

The determination of activity concentrations of the CTBT-relevant radioxenon relies on a robust calibration method. A procedure is outlined using four radioxenon spikes for beta-gamma detector-systems with 4π geometry. Detection efficiencies of beta-gamma coincidences in the net count calculation method, including the interference matrix between radioxenon and radon, are determined by three measurement channels: beta singles, gamma singles and beta-gamma coincidences, without reference activity values.

Keywords: Beta/gamma coincidence measurement; CTBT; Efficiency calibration; International monitoring system; Net count calculation; Radioxenon.