arXiv subjects

Galin Bistrev

Publications and source records attributed to Galin Bistrev.

2 recordsLinked to original sources

arXiv2025

Multichannel SiPM test readout system for gamma-ray measurements with monolithic inorganic CeBr_{3}

Energy resolution and the detection efficiency for gamma quanta are fundamental properties in the construction of detectors for ionizing radiation. In this study, a SiPM-based photodetector coupled to a monolithic inorganic CeBr_{3} crystal is exposed to gamma rays in order to study the performance of the CeBr_{3} crystal. Measurements are made using three different radioactive sources - ^{137}Cs, ^{22}Na, and ^{60}Co. For each source, the measurements are conducted at several SiPM bias voltages. Furthermore, two CeBr_{3} crystals with different thicknesses are used in order to study how detector efficiency is affected by crystal dimensions. A preliminary analysis of the data is presented.

physics.ins-det↗

arXiv2025

Study of a small-scale gamma-ray detection system employing Compton scattering with a monolithic CeBr3 crystal and segmented photodetector array

Study of high energy cosmic events in the MeV range requires detector with high efficiency and energy resolution to be constructed. The present setup consisting of scintillator crystals CeBr3 with different thickness, each coupled with 12 x 12 segmented SiPM-based photodetector in a multichannel system represents an initial exploration of a gamma imaging system based on Compton scattering principles. A Monte Carlo simulation was conducted to evaluate the energy deposit and detection efficiency using the 137Cs gamma line. The study reveals a correlation between the relative distance between detector planes and the energy deposition efficiency, providing valuable insights into optimizing the telescope design.

physics.ins-det↗