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- W3203535382 abstract "Abstract Depth of interaction (DOI) measurements can provide additional position information when long scintillator bars or scintillator pixels with relatively large thickness are employed in gamma-ray imaging detectors. In this study, commercially available GGAG ceramic scintillators were used to fabricate a gamma-ray imaging detector. The light attenuation, DOI resolution, and spectroscopic performance of 3.0× 3.0× 48.0 mm 3 ceramic bars were evaluated using double-side SiPM readout. The measured full width at half maximum (FWHM) energy resolution values ranged between 7.6% and 8.7% at 511 keV. The DOI resolution was approximately 4 mm (FWHM). A prototype two-layer Compton imaging detector was fabricated based on 32 ceramic bars and the signals were readout using four 16-ch application-specific integrated circuits. The lutetium background was evaluated and a 22 Na point source (0.19 μSv/h 511 keV gamma-ray dose rate at 50 cm) was used to verify the feasibility of using the commercial GGAG ceramic material in nuclear security applications. The source can be located within 120 s using a simple back projection method. The angular resolution measure was estimated as 15 ∘ (FWHM). A filtered back projection based algorithm improved the angular resolution (FWHM) to 9.2 ∘ ." @default.
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- W3203535382 date "2021-10-01" @default.
- W3203535382 modified "2023-09-26" @default.
- W3203535382 title "Development of a gamma-ray imaging detector based on ceramic scintillators with SiPM readout" @default.
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- W3203535382 doi "https://doi.org/10.1088/1748-0221/16/10/p10005" @default.
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