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- W3205751237 abstract "This paper describes the synthesis, crystal growth, detector fabrication, radiation hardening studies, MCNP modeling, and characterization of lithium indium diselenide or LiInSe 2 . This newly-developed room-temperature thermal neutron detector has semiconducting and scintillating properties and it is suitable for neutron detection application. LiInSe 2 was synthesized starting from elemental Li, In, Se in two steps due to high reactivity of Li. A single crystal of LiInSe 2 was grown using the Vertical Bridgman method . The room temperature band gap was found to be 2.8 eV using optical absorption measurements. Bulk resistivity was measured at ∼ 5 × 10 11 Ω cm. Photoconductivity measurements of LiInSe 2 wafers identified a peak in the photocurrent around 445 nm. Nuclear radiation detectors were fabricated from single crystal wafer and the responses to alpha particles at various biases were measured. The mobility-lifetime product was estimated. Gamma irradiation studies were performed with calculated absorbed doses ranging from 0.2126 to 21,262 Gy. The characterization of the two wafers for their scintillator performance was conducted after each irradiation. The gamma irradiation produced a reduction of the light yield that translated to a lower channel number for the centroid of alpha detection spectra. It also showed a considerable reduction of the decay time after the first irradiation. These are the first studies on gamma radiation hardening with this material. • Gamma radiation hardening studies were performed and the material was characterized before and after treatment. • Resistivity, band gap and mobility lifetime measurements were made. • Crystalline material was grown and fabricated as a semiconductor and scintillator using an alpha source. • Radiation hardening contributed to a decrease in light yield and a decrease in channel number as well as decay time." @default.
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- W3205751237 date "2021-12-01" @default.
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- W3205751237 title "Lithium indium diselenide — An advanced material for neutron detection" @default.
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- W3205751237 doi "https://doi.org/10.1016/j.nima.2021.165898" @default.
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