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Study of the Coincidence Time Resolution of New Perovskite Bulk Crystals
- Source :
- 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
- Publication Year :
- 2019
- Publisher :
- IEEE, 2019.
-
Abstract
- Compared to scintillator based PET detectors, semiconductor detectors tend to provide excellent energy and spatial resolution. However, due to the relatively slow charge carrier collection time limited by the carrier drift velocity, semiconductor based detectors have poor time resolution in the range of several nanoseconds or greater. Possibilities exist to collect prompt photons emitted from certain semiconductor materials in order to greatly improve the timing capability. In this work, we studied the prompt photon emission property and fast timing capability of two new perovskite semiconductor materials, CsPbCl 3 and CsPbBr 3 , and compared them with TlBr, which has been previously studied for its Cerenkov emission property. The coincidence time resolution (CTR) acquired between a 3 × 3 × 3 mm3 semiconductor sample crystal and a 3 × 3 × 3 mm3 reference LYSO crystal are 238 ± 16 ps, 468 ± 55 ps and 384 ± 31 ps for CsPbCl 3 , CsPbBr 3 , and TlBr respectively, when the LYSO crystal was only triggered on photoelectric events. When we lowered the trigger level and allowed the LYSO crystal to be triggered on all events including Compton scattering, we acquired CTR of 281 ± 17ps, 499 ± 77ps and 422 ± 46ps for CsPbCt 3 , CsPbBr 3 , and TlBr respectively. Combined with the easily scalable crystal growth process, relatively low cost, low toxicity, and high energy resolution (around 3.8% at 662keV), we conclude that CsPbCl 3 and CsPbBr3 could be exceptional next generation candidates as semiconductor PET detector materials.
- Subjects :
- Materials science
business.industry
Compton scattering
02 engineering and technology
Scintillator
Photoelectric effect
021001 nanoscience & nanotechnology
Lyso
030218 nuclear medicine & medical imaging
Semiconductor detector
Crystal
03 medical and health sciences
0302 clinical medicine
Semiconductor
Optoelectronics
Charge carrier
0210 nano-technology
business
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)
- Accession number :
- edsair.doi...........0de5e714de7cfc2a6fc43acd35bc913a