High-performance radiation detection materials are an integral part of national security, medical imaging, and nuclear physics applications. Those that offer compositional and manufacturing versatility are of particular interest. Here, we report a new family of radiological particle-discriminating scintillators containing bis(9,9-dimethyl-9H-fluoren-2-yl)diphe-nylsilane (compound “P2”) and in situ polymerized vinyltoluene (PVT) that is phase stable and mechanically robust at any blend ratio. The gamma-ray light yield increases nearly linearly across the composition range, to ~16 400 photons/MeV at 75 wt.% P2. These materials are also capable of performing $\gamma $ /n pulse shape discrimination (PSD), and between 20% and 50% P2 loading is competitive with the PSD quality of commercially available plastic scintillators. The ¹³⁷ Cs scintillation rise and decay times are sensitive to P2 loading and approach the values for “pure” P2. Additionally, the radiation detection performance of P2-PVT blends can be made stable in 60 °C air for at least 1.5 months with the application of a thin film of poly(vinylalcohol) to the scintillator surfaces.

中文翻译：

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使用二芴基硅烷有机玻璃和原位聚合乙烯基甲苯的无定形混合物进行有效的快速闪烁和快速中子-伽马射线识别

高性能辐射探测材料是国家安全、医学成像和核物理应用不可或缺的一部分。那些提供组合和制造多功能性的产品尤其令人感兴趣。在这里，我们报告了一个新的放射性粒子识别闪烁体系列，包含双（9,9-二甲基-9H-芴-2-基）二苯甲基硅烷（化合物“P2”）和原位聚合乙烯基甲苯 (PVT)，在任何混合比例下均具有相稳定和机械强度。伽马射线光产额在整个组成范围内几乎线性增加，在 75 wt.% P2 下达到 ~16 400 光子/MeV。这些材料还能够执行 $\伽马$ /n 脉冲形状鉴别 (PSD) 和 20% 至 50% 的 P2 负载与市售塑料闪烁体的 PSD 质量相比具有竞争力。在^137个 铯闪烁上升和下降时间是P2负载敏感，接近值“纯” P2。此外，通过将聚乙烯醇薄膜应用于闪烁体表面，P2-PVT 混合物的辐射检测性能可以在 60°C 的空气中稳定至少 1.5 个月。