مورد إلكتروني
Time Resolution Studies of Thallium Based Cherenkov Semiconductors
| العنوان: | Time Resolution Studies of Thallium Based Cherenkov Semiconductors |
|---|---|
| بيانات النشر: | Frontiers Media S.A. country:CH 2022 |
| تفاصيل مُضافة: | Terragni, G Pizzichemi, M Roncali, E Cherry, S Glodo, J Shah, K Arino-Estrada, G Auffray, E Ghezzi, A Kratochwil, N Terragni G. Pizzichemi M. Roncali E. Cherry S. R. Glodo J. Shah K. Arino-Estrada G. Auffray E. Ghezzi A. Kratochwil N. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | In the context of improving the detector performance of time-of-flight positron emission tomography (TOF-PET), the combination of charge induction readout and prompt Cherenkov photon production in semiconductor materials can lead to an outstanding detector performance in energy, timing, and spatial resolution. Energy resolutions as good as 1.2% at 662 keV and 5% at 122 keV are reported for pixel thallium bromide (TlBr) detectors. The high refractive index of Tl-based materials, between 2.3 and 2.6, leads to a high Cherenkov photon generation yield but can also challenge photon extraction, potentially affecting the time performance. In this work, the timing properties of TlBr and thallium chloride (TlCl) crystals of different geometries are measured using an optimized test setup with high-frequency readout electronics. A coincidence time resolution (CTR) value of 167 ± 6 ps FWHM is achieved using a 3 × 3 × 3 mm3 black-painted TlBr crystal. In order to assess potential improvements, a Geant4-based simulation tool kit is developed and validated against experimental measurements. The simulation tool kit is used to predict the contributions limiting the time resolution regarding the crystal and photodetector properties, highlighting the potential of such materials. Finally, paths to further improve the detector performance in TOF-PET are discussed. |
| مصطلحات الفهرس: | Cherenkov emission, coincidence time resolution (CTR), GEANT4 simulation, silicon photomultiplier (SiPM), TlBr crystal, TlCl crystal, TOF-PET, info:eu-repo/semantics/article |
| URL: | info:eu-repo/semantics/altIdentifier/wos/WOS:000771614100001 volume:10 journal:FRONTIERS IN PHYSICS |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | ELETTRONICO English |
| أرقام أخرى: | ITBAO oai:boa.unimib.it:10281/445822 10.3389/fphy.2022.785627 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85126761601 1415733781 |
| المصدر المساهم: | BICOCCA OPEN ARCH From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1415733781 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |