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Condens. Matter 2019, 4(1), 24;

Scintillator Pixel Detectors for Measurement of Compton Scattering

Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, 10000 Zagreb, Croatia
Author to whom correspondence should be addressed.
Current address: Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia.
Received: 31 January 2019 / Revised: 12 February 2019 / Accepted: 13 February 2019 / Published: 15 February 2019
(This article belongs to the Special Issue High Precision X-Ray Measurements)
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The Compton scattering of gamma rays is commonly detected using two detector layers, the first for detection of the recoil electron and the second for the scattered gamma. We have assembled detector modules consisting of scintillation pixels, which are able to detect and reconstruct the Compton scattering of gammas with only one readout layer. This substantially reduces the number of electronic channels and opens the possibility to construct cost-efficient Compton scattering detectors for various applications such as medical imaging, environment monitoring, or fundamental research. A module consists of a 4 × 4 matrix of lutetium fine silicate scintillators and is read out by a matching silicon photomultiplier array. Two modules have been tested with a 22 Na source in coincidence mode, and the performance in the detection of 511 keV gamma Compton scattering has been evaluated. The results show that Compton events can be clearly distinguished with a mean energy resolution of 12.2% ± 0.7% in a module and a coincidence time resolution of 0.56 ± 0.02 ns between the two modules. View Full-Text
Keywords: Compton camera; positron emission tomography; Compton scattering; scintillation detector; silicon photomultiplier; medical applications Compton camera; positron emission tomography; Compton scattering; scintillation detector; silicon photomultiplier; medical applications

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Makek, M.; Bosnar, D.; Pavelić, L. Scintillator Pixel Detectors for Measurement of Compton Scattering. Condens. Matter 2019, 4, 24.

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