Scintillating Metal Organic Framework for radioactive gas detection
Résumé
The detection of radioactive gases (RG) is of an utmost importance for radioprotection. The target gases in this project are 85Kr, 133Xe, and 3H. One of the methods used for RG detection is liquid scintillation. A scintillator is a material that converts ionizing radiation into photons, which can be detected using photodetectors. Liquid scintillation, however, only allows for remote detection. A new class of porous scintillating materials, including Metal Organic Frameworks (MOF) is investigated.
MOFs are the only class of porous materials to combine high surface areas of about 2000 m2.g-1 and a modular synthesis approach, which allows us to explore a large variety of fluorescent sponge-like materials. The RG is circulated through the MOF, where it is absorbed and concentrated. This maximizes the surface contact between the RG and detector material. The MOF absorbs the energy from the ionizing radiation produced by the disintegration of the RG and emits photons, which will be detected by three photomultiplier tubes in coincidence.
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