Joint Seminar of the 38th Nuclear Spectroscopy Lab. & Quantum Beam Application Research (B03)
・Lecturer: Yuntao Wu (Shanghai Institute of Ceramics, Chinese Academy of Sciences)
・Title: Development of 6Li-loaded Halide Scintillators toward Neutron Detection
・Date: Sep 2 (Fri.), 2022, 14:00 -
・Place: Zoom (the URL will be distributed on demand)
Neutron detectors are widely used in the field of fundamental research, homeland security and oil well logging. In recent years, because the most common 3He proportional counters for thermal neutron detection are in short supply, it is urgent to search for alternatives. Inorganic scintillating crystals containing 6Li that have a large capturing cross-section of thermal neutrons have been extensively studied, and regarded as promising candidates of replacing 3He proportional counters for neutron detection. Quite a few high performance halide scintillating crystals for neutron detection have been discovered and developed, such as LiI:Eu, and elpasolite-structured crystals like Cs2LiYCl6:Ce (CLYC) and CsLiLaBr6:Ce (CLLB). Although 6LiI:Eu has high detection efficiency for thermal neutron, it is difficult to handle due to its extremely high hygroscopicity. CLYC and CLLB are capable of detecting and discriminating γ-ray and neutron, but not ease of scaling up due to incongruent melting nature. In this talk, I will introduce three kinds of novel inorganic scintillators developed in SICCAS: 1) 3 inch NaI:Tl,6Li single crystals with decent gamma spectroscopy and n/γ discrimination performance; 2) 6Li-loaded zero-dimensional perovskite crystals with a compelling combination of a high stability against moisture and oxygen, high light yield under gamma and neutron irradiation, and a good neutron-gamma discrimination capability; 3) self-assembled eutectics with tunable microstructures toward neutron imaging.
・Host laboratory: Nuclear spectroscopy laboratory