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- W2591906372 abstract "Eu:SrI2 bulk single crystals with 1.5-in diameter were grown using the Bridgman–Stockbarger technique and special-shaped crucibles. We will report on the growth of the 1.5-in size Eu:SrI2 single crystal and the preliminary test of the same sample cut in size of ${10 times 10 times 10}$ mm3 with polishing. An energy resolution of 3.2% full width at half maximum (FWHM) was obtained for 137Cs. After cutting and polishing the grown crystal to the size of ${3 times 3 times 3}$ mm3, ${8 times 8}$ matrix Eu:SrI2 arrays were fabricated. We made a test module consisting of Eu:SrI2 arrays, which was optically coupled with position sensitive photomultiplier tube (PSPMT) and multi-pixel photon counter (MPPC) array. The position and energy performance of the test module were evaluated using 137Cs and 57Co radioactive sources. As a result, we were able to resolve all pixels clearly. A good energy resolution of 6.7% ± 0.7% (FWHM) and 8.2% ± 2.5% (FWHM) for 662 keV was obtained using PSPMT and MPPC arrays, respectively. In the same way, energy resolution of 12.7% ± 1.3% and 14.7% ± 3.4% (FWHM) for 122 keV was obtained using PSPMT and MPPC-array, respectively. These energy resolutions considerably degraded compared with an energy resolution of the single piece of Eu:SrI2 sample owing to the thinness of the Teflon reflector. This conclusion can be considered as a strong motivation for future research on the choice of reflector materials and structure of the Eu:SrI2 array." @default.
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- W2591906372 date "2017-07-01" @default.
- W2591906372 modified "2023-09-24" @default.
- W2591906372 title "Development of Eu:SrI<sub>2</sub> Scintillator Array for Gamma-Ray Imaging Applications" @default.
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- W2591906372 doi "https://doi.org/10.1109/tns.2017.2676769" @default.
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