Yazar "Ahmadov, Gadir" seçeneğine göre listele

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    Gamma-ray spectroscopy with MAPD array in the readout of LaBr3:Ce scintillator
    (Iop Publishing Ltd, 2021) Ahmadov, Gadir; Ahmadov, Faig N.; Holik, Michael; Yılmaz, Ercan; Doğancı, Emre; Berikov, Daniyar
    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.
  • Küçük Resim
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    Investigation of the possibility of a new detector based on SiPM in nuclear forensics
    (IOP Publishing Ltd, 2023) Holik, Michael; Ahmadov, F.; Sadygov, A.; Ahmadov, Gadir; Naghlyev, J.; Yılmaz, Ercan
    The development of nuclear technologies, the production and active use of radioiso-topes, and the production of radiopharmaceuticals, medical isotopes and other radioactive materials are increasing every year. Therefore, the importance of ensuring the safety of highly active iso-topes, as well as providing the necessary instruments for measuring and identifying radioactive materials, must be taken into account. Modern equipment such as high purity germanium detectors (HPGe) is costly and requires specialized staff skills as well as special operating conditions such as low temperatures and high voltages. It is proposed to explore the possibilities of using a silicon photomultiplier (SiPM) with a deep pixel structure in nuclear gamma spectrometry, which will make it possible to increase the efficiency of scintillation detectors. The paper presents the results of a study of the newest silicon photomultipliers MAPD-3NM II assembled in a 16-element matrix, which was the detector part of the proposed LaBr3(Ce) scintillation spectrometer. The study was carried out using radioisotopes of uranium. The aim of the research is to reveal the possibility of differentiating depleted and natural uranium materials from each other without using special software by means of the proposed set of equipment.