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Progress in fast and red plastic scintillators

Matthieu Hamel 1, * 
* Corresponding author
1 LCAE - Laboratoire Capteurs et Architectures Electroniques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : Radiological detection where Cherenkov residual background can be prominent requires scintillators with increased emission wavelength. Cherenkov residual background precludes the use of UV-emitting sensors such as plastic scintillators. However, the literature is scarce in red-emitting plastic scintillators and only one commercial scintillator is currently available (BC-430, from Saint-Gobain Crystals and Detectors). In addition, X-ray imaging or Time-of-Flight Positron Emission Tomography (ToF-PET) applications are also demanding on this type (color) of scintillators, but only their scintillation decay time is fast, which is not particularly the case for BC-430. We present herein our latest developments in the preparation and the characterization of fast and red plastic scintillators for this application. Here "fast" means nanosecond range decay time and "red" is an emission wavelength shifted towards more than 550 nm. At first, the strategy to the preparation of such material is explained by decomposing the scintillator to fundamental elements. Each stage is then optimized in terms of decay time response, then the elemental bricks are arranged to give plastic scintillator formulations that are compatible with the abovementioned characteristics. The results are compared with the red-emissive BC-430 commercial plastic, and the ultra-fast, violet-emitting BC-422Q 1% plastic.
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Submitted on : Monday, February 21, 2022 - 1:00:22 PM
Last modification on : Wednesday, February 23, 2022 - 3:30:42 AM
Long-term archiving on: : Sunday, May 22, 2022 - 6:41:22 PM

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Matthieu Hamel. Progress in fast and red plastic scintillators. Chemosensors, MDPI, 2022, 10 (2), pp.86. ⟨10.3390/chemosensors10020086⟩. ⟨cea-03582648⟩

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