Optical transmittance and pulse shape discrimination of polystyrene/poly(methyl methacrylate)-based plastic scintillators  

作　　者：Yi-Yao Liang Ying-Du Liu Pu-Sen Wang Jie Bao Xiao-Ping Ouyang 

机构地区：[1]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China [2]Nuclear Data Key Laboratory,China Institute of Atomic Energy,Beijing 102413,China

出　　处：《Nuclear Science and Techniques》2025年第1期94-102,共9页核技术(英文)

基　　金：supported by the National Natural Science Foundation of China(No.12027813);the fund of National Innovation Center of Radiation Application of China(Nos.KFZC2020020501,KFZC2021010101).

摘　　要：Polymethyl methacrylate(PMMA)is an optically transparent thermoplastic with favorable processing conditions.In this study,a series of plastic scintillators are prepared via thermal polymerization,and the impact of PMMA content on their transparency and pulse shape discrimination(PSD)ability is investigated.The fabricated samples,comprising a polystyrene(PS)-PMMA matrix,30.0 wt%2,5-diphenyloxazole(PPO),and 0.2 wt%9,10-diphenylanthracene(DPA),exhibit high transparency with transmissivity ranging from 70.0 to 90.0%(above 415.0 nm)and demonstrate excellent n/γdiscrimination capability.Transparency increased with increasing PMMA content across the entire visible light spectrum.However,the PSD performance gradually deteriorated when the aromatic matrix was replaced with PMMA.The scintillator containing 20.0 wt%PMMA demonstrated the best stability concerning PSD properties and relative light yields.

关 键 词：Neutron detection Plastic scintillation Pulse shape discrimination Polymethyl-methacrylate POLYSTYRENE 

分 类 号：TL816.3[核科学技术—核技术及应用] TQ320.1[化学工程—合成树脂塑料工业]