Published January 1, 2021
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Gamma-ray spectroscopy with MAPD array in the readout of LaBr3:Ce scintillator
Creators
- 1. Inst Radiat Problems ANAS, 9 B Vahabzade Str, AZ-1143 Baku, Azerbaijan
- 2. Natl Nucl Res Ctr, Inshaatchilar 4, AZ-1073 Baku, Azerbaijan
- 3. Joint Inst Nucl Res, Joliot Curie 6, Dubna 141980, Russia
- 4. Czech Tech Univ, Inst Expt & Appl Phys, Husova 240-5, Prague 11000, Czech Republic
- 5. Abant Izzet Baysal Univ, Nucl Radiat Detectors Applicat & Res Ctr, TR-14030 Bolu, Turkey
- 6. UWB Pilsen, Fac Elect Engn, Univ 2795-26, Plzen 30614, Czech Republic
Description
This paper presented a new detector module consisting of a micropixel avalanche photodiode (MAPD-3NM), LaBr3:Ce scintillator, and a compact read-out interface system for detecting gamma-rays in a wide energy range. The MAPD array (4 x 4 channels) was assembled using a single MAPD-3NM characterized by its high photon detection efficiency (similar to 25%), pixel density (10000 pixel s/mm(2)), low operation voltage (74.5 V), and low dark current. An active area of a single MAPD-3NM was 3.7 x 3.7 mm(2), while this value was 17 x 17 mm(2) for the assembled array with pixel density of 2190000. The size of the tested LaBr3:Ce scintillator was 15 x 15 x 15 mm(3). According to the characteristics of the detector module, a compact read-out interface device (SPECTRIG MAPD) was developed. SPECTRIG MAPD was designed as a miniature device with low power consumption, which continues to provide a wide spectrum of functions needed for measurement and test silicon photomultipliers (SiPM) and scintillation detectors on their basis. The various experiments were implemented to test the detection performance of a detector module to gamma radiation in the range from 30 keV to 4400 keV.
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