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Korzhik M.,Abashev R.,Fedorov A.,Dosovitskiy G.,Gordienko E.,Kamenskikh I.,Kazlou D.,Kuznecova D.,Mechinsky V.,Pustovarov V.,Retivov V.,Vasil'ev A. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.7
Ceramics of quaternary garnets (Gd,Y)3Al2Ga3O12 doped with Ce, Tb have been fabricated and evaluated as prospective materials for indirect energy converters of a-and b-voltaic. Samples were characterized at excitation with an X-ray source and an intense 150 keV electron beam and showed good temperature stability of their emission and tolerance to irradiation. The role of X-rays accompanied the a-particle emitting in the increase of the conversion efficiency is clarified. The garnet-type structure of the matrix in the developed materials allows the production of quality crystalline mass with a light yield exceeding that of the commonly used YAG: Ce scintillator by a factor of two times
Sensitivity of GAGG based scintillation neutron detector with SiPM readout
Fedorov, A.,Gurinovich, V.,Guzov, V.,Dosovitskiy, G.,Korzhik, M.,Kozhemyakin, V.,Lopatik, A.,Kozlov, D.,Mechinsky, V.,Retivov, V. Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.10
Here we report on the first results of sensitivity evaluation of the gadolinium-aluminum-gallium- garnet (GAGG) scintillation detector with SiPM readout to fast and slow neutrons and, to the natural background and Co-60 γ-radiation as well. Data on sensitivity were obtained using certified dosimetry benches, so it can be utilized in the calculation of detection limits of neutron flux with such type of detectors. It was concluded that use of GAGG scintillator has a good prospect for neutron monitoring in different parts of nuclear research reactors and power plants.
GYAGG/ 6 LiF composite scintillation screen for neutron detection
A. Fedorov,I. Komendo,A. Amelina,E. Gordienko,V. Gurinovich,V. Guzov,G. Dosovitskiy,V. Kozhemyakin,D. Kozlov,A. Lopatik,V. Mechinsky,V. Retivo,V. Smyslova,A. Zharova,M. Korzhik 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.3
Composite scintillation screens on a base of Gd1.2Y1.8Ga2.5Al2.5O12:Ce (GYAGG) scintillator have beenevaluated for neutron detection. Besides the powdered scintillator, the composite includes 6LiF particles;both are merged with a binder and deposited onto the light-reflecting aluminum substrate. Resultsobtained demonstrates that screens are suitable for use with a silicon photomultiplier readout to create aprospective solution for a compact and low-cost thermal neutron sensor. Composite GYAGG/6LiF scintillationscreen shows a pretty matched sensitivity and g-background rejection with a widely usedZnS/6LiF screens however, possesses forty times faster response.