闪烁体
物理
中子
中子探测
闪烁
光电倍增管
产量(工程)
中子温度
伽马射线
伽马能谱学
核物理学
闪烁计数器
探测器
光学
材料科学
热力学
作者
Nathaniel Kaneshige,Lakshmi Soundara Pandian,Kyle Werra,J. Tower,Jarek Glodo,Erik B. Johnson,Michael P. Dion,I. Garishvili,Greg Westphal,Louise G Evans,Michael R. Squillante,K.S. Shah
出处
期刊:IEEE Transactions on Nuclear Science
[Institute of Electrical and Electronics Engineers]
日期:2023-07-01
卷期号:70 (7): 1357-1361
标识
DOI:10.1109/tns.2023.3262107
摘要
High-temperature detectors are required for nuclear material accounting measurements for some advanced reactor designs including molten salt reactors. The Cs 2 LiLa (Br,Cl) 6 :Ce (CLLBC) scintillator is a dual-mode scintillator that shows excellent gamma detection along with the capability to discriminate gamma rays from neutrons and is available as a commercial product from Radiation Monitoring Devices Inc. (RMD). The energy resolution at room temperature (RT) is ~3.0% at 662 keV with a light yield of ~45 000 ph/MeV. The gamma-neutron pulse shape discrimination (PSD) figure of merit (FOM) is ~3.5 at RT. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 °C to 200 °C. The results showed a good light yield response for gamma events as a function of temperature while the light yield for neutron-capture events monotonically decreased from 100% to 76% at 200 °C. When integrated with a high-temperature photomultiplier, at 175 °C we obtained energy resolutions of 7.8% for 662 keV gammas and 4.2% for neutron-capture events, together with a PSD FOM of 0.74.
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