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Article Dans Une Revue npj 2D Materials and Applications Année : 2019

On the use of CdSe scintillating nanoplatelets as time taggers for high-energy gamma detection

Résumé

The technological challenge imposed by the time resolution essential to achieve real-time molecular imaging calls for a new generation of ultrafast detectors. In this contribution, we demonstrate that CdSe-based semiconductor nanoplatelets can be combined with standard scintillator technology to achieve 80 ps coincidence time resolution on a hybrid functional pixel. This result contrasts with the fact that the overall detector light output is considerably affected by the loss of index-light-guiding. Here, we exploit the principle of 511 keV energy sharing between a high-Z, high stopping power bulk scintillator, and a nano-scintillator with sub-1 ns radiative recombination times, aiming at a breakthrough in the combined energy and time resolution performance. This proof-of-concept test opens the way to the design and study of larger size sensors using thin nanocomposite layers able to perform as efficient time taggers in a sampling detector geometry of new generation.
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Dates et versions

hal-02348053 , version 1 (10-12-2020)

Identifiants

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R. Turtos, S. Gundacker, S. Omelkov, Benoit Mahler, A. Khan, et al.. On the use of CdSe scintillating nanoplatelets as time taggers for high-energy gamma detection. npj 2D Materials and Applications, 2019, 3 (1), ⟨10.1038/s41699-019-0120-8⟩. ⟨hal-02348053⟩
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