6LiI:Eu/LaBr3:Ce phoswich detector for detection and discrimination of thermal neutron and gamma radiation

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-19 DOI:10.1016/j.nima.2025.170428

D.S. Sisodiya , G.D. Patra , S.G. Singh , A.K. Singh , S. Pitale , M. Ghosh , Shashwati Sen

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引用次数: 0

Abstract

A phoswich detector consisting of ⁶LiI:Eu (2 mm L x 25 mm dia) and LaBr₃:Ce (20 mm L x 25 mm dia) single crystal is developed to detect and discriminate thermal neutrons and gamma radiation employing pulse shape discrimination (PSD) and pulse height discrimination. The thicknesses of the ⁶LiI:Eu crystals is kept to ∼2 mm to make it transparent to high energy gamma along with maximum efficiency for thermal neutron detection. We are able to discriminate neutron interaction in ⁶LiI:Eu from the gamma event detected in both LaBr₃:Ce and ⁶LiI:Eu by pulse height as well as PSD cutoffs. The figure of merit for discriminating thermal neutron (in ⁶LiI:Eu) from high energy gamma radiation (in LaBr₃:Ce) is approximately 11. Further, by adding a Bi₄Ge₃O₁₂ (BGO) crystal as top layer in this phoswich detector we can detect and discriminate charged particles like alpha and beta along with thermal neutron and gamma.

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6LiI:Eu/LaBr3:Ce光子探测器，用于热中子和伽马辐射的探测和识别

研制了一种由6LiI:Eu （2mm L × 25mm直径）和LaBr3:Ce （20mm L × 25mm直径）单晶组成的光子探测器，利用脉冲形状鉴别（PSD）和脉冲高度鉴别技术探测和鉴别热中子和伽马辐射。6LiI:Eu晶体的厚度保持在~ 2mm，以使其对高能伽马透明，并具有最大的热中子探测效率。我们能够通过脉冲高度和PSD截止来区分6LiI:Eu中的中子相互作用与LaBr3:Ce和6LiI:Eu中检测到的伽马事件。区分热中子（在6LiI:Eu中）和高能伽马辐射（在LaBr3:Ce中）的优值约为11。此外，通过在光电探测器的顶层添加Bi4Ge3O12 （BGO）晶体，我们可以探测和区分像α和β这样的带电粒子以及热中子和γ。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.