CTBT Science and Technology Conference 2021 (SnT2021)

Session

T3.2 - Laboratories Including Transportable and Field Based Facilities

O3.2

1 Jul 2021, 16:15

218. Long-term verification of radionuclide laboratory gain and efficiency stability (O3.2-218)

Mr Michael Foxe (Pacific Northwest National Laboratory (PNNL), Richland, WA, USA)

01/07/2021, 16:20

T3.2 - Laboratories Including Transportable and Field Based Facilities

Oral

As radioxenon samples are collected around the world at the CTBTO IMS stations, a subset of those are sent to radionuclide laboratories around the world for re-analysis. PNNL operates the U.S. Noble Gas Laboratory (US-NGL), which was certified in December of 2016. There is also an opportunity to utilize the radioxenon laboratories in a field system comparison experiment. In this presentation,...

482. A high-resolution laboratory-based beta-gamma coincidence spectrometry system for radioxenon measurement (O3.2-482)

Mr Matthew Goodwin (AWE Aldermaston, Reading, United Kingdom)

01/07/2021, 16:35

T3.2 - Laboratories Including Transportable and Field Based Facilities

Oral

GBL15, the UK’s noble gas certified Comprehensive Nuclear-Test-Ban Treaty (CTBT) radionuclide laboratory supports the International Monitoring System (IMS) through measurement of environmental radioxenon samples using beta-gamma coincidence spectrometry. GBL15 currently utilises a system comprised of NaI(Tl) photon detectors and plastic scintillator electron-detectors to measure coincident...

654. Installation for the measurement of low activities of 37Ar based on the detection of liquid argon scintillation (O3.2-654)

Mr Sergei Pakhomov (Khlopin Radium Institute, St. Petersburg, Russian Federation)

01/07/2021, 16:50

T3.2 - Laboratories Including Transportable and Field Based Facilities

Oral

One of the most conclusive evidences of a violation of CTBT is the presence in the subsoil air of elevated concentrations of 37Ar radionuclide, which is formed in large quantities in the interaction of neutrons with calcium in rocks.
Traditionally, to measure the activity of 37Ar, proportional gas counters are used, which are filled with a counting gas prepared from samples of argon with the...