Abstract
The intrinsic background of a LaBr3(Ce) scintillator with a diameter of 5 mm and a height of 10 mm has been studied in comparison with LYSO and CeBr3 scintillators. It is shown that due to its high energy resolution the detector based on a LaBr3(Ce) crystal exhibits the lowest background count rate in a specified amplitude range. The measured energy resolution of the detector based on a LaBr3(Ce) crystal with dimensions of Ø5 mm × 10 mm in combination with a silicon photomultiplier with an active area of 3 × 3 mm2 are presented. It is demonstrated that a detector array with the proposed configuration (a scintillator + a silicon photomultiplier enclosed in a common container) exhibits an energy resolution of 4% for 661.7-keV γ rays and a background count rate of ~0.39 cps in the energy range of (140 ± 3σ) keV.
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Original Russian Text © A.K. Berdnikova, F.A. Dubinin, V.V. Dmitrenko, K.I. Zhukov, V.A. Kantserov, N.V. Klassen, A.D. Orlov, D.Yu. Pereima, S.Z. Shmurak, 2017, published in Pribory i Tekhnika Eksperimenta, 2017, No. 2, pp. 29–34.
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Berdnikova, A.K., Dubinin, F.A., Dmitrenko, V.V. et al. Studying the spectrometric characteristics of an ionizing-radiation detector based on a LaBr3(Ce) scintillator and a silicon photomultiplier. Instrum Exp Tech 60, 182–187 (2017). https://doi.org/10.1134/S0020441217010183
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DOI: https://doi.org/10.1134/S0020441217010183