Related Experiment Video
Updated: Jan 22, 2026

Research and Development of High-performance Explosives
Published on: February 20, 2016
Introducing the MARGOT prototype: An ultra-compact and mobile gas detection system for nuclear explosion monitoring
V Thomas1, O Delaune1, A Cagniant1
1CEA, DAM, DIF, F-91297, Arpajon, France.
Abstract:
An ultra-compact and unshielded spectrometer for analysis of atmospheric radioxenons has been developed. This system works at ambient temperature and has a 58 cm3 inner active volume. Atmospheric radioxenons activities are determined with electron/photon coincidence technique using both NaI(Tl) detector and large pixellized Si-PIN detector. The performances of the detection system without shielding in terms of Minimal Detectable Activities are below 65 mBq for a 12 h acquisition, for all radioxenons of interest. An enhanced version of the prototype presented here is already under development: the Mobile Analyzer for Radioactive Gases OuTflows (MARGOT) system.
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