Gamma-ray spectroscopy with MAPD array in the readout of LaBr<sub>3</sub>:Ce scintillator
G. Ahmadov, F. Ahmadov, M. Holík, D. Berikov, Z. Sadygov, R. Akbarov, S. Nuruyev, A. Sadigov, A. Mammadli, R. Mammadov, Yu. N. Kopatch, P. Přidal, Ercan Yılmaz, Emre Doğanci, Jan Zich
Abstract
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 × 4 channels) was assembled using a singleMAPD-3NMcharacterized by its high photon detection efficiency (∼25%),pixel density (10 000 pixels/mm2), lowoperation voltage (74.5 V), and lowdark current. An active area of a singleMAPD-3NMwas 3.7 × 3.7 mm2, while this value was 17 × 17 mm2 for the assembled array with pixel density of 2190 000. The size of the tested LaBr3:Ce scintillator was 15 × 15 × 15 mm3. 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.