Cs2LiLaBr6-xClx:Ce (CLLBC) has high energy resolution for gamma detection and high sensitivity for neutron detection. It is one of the neutron-gamma dual-mode scintillators developed in recent years. This work studies the performance of an 18-mm CLLBC cube for gamma and neutron detection for temperatures between − 20 °C and 50 °C. In addition, the scintillator was coupled to the SensL J- and C-series silicon photomultipliers (SiPMs) for comparison. Throughout the temperature range, better energy resolution is observed for the scintillator coupled to the J-series SiPMs which can be attributed to the higher photon detection efficiency. For thermal neutron detection, the output of the detector was recorded by a waveform digitizer and analyzed offline on a computer. To distinguish neutrons from gammas, a pulse shape discrimination technique was utilized. A good separation between neutrons and gammas is observed for all the temperatures. However, separating neutrons from the intrinsic alphas is somewhat difficult at low temperatures. In spite of this, this 18-mm CLLBC cube is a high-performance scintillator and is suitable for deployment in radiation detectors for nuclear security and safeguards applications.

中文翻译：

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耦合到硅光电倍增管的 CLLBC 的表征

Cs2LiLaBr6-xClx:Ce (CLLBC) 具有用于伽马探测的高能量分辨率和用于中子探测的高灵敏度。它是近年来开发的中子-伽马双模闪烁体之一。这项工作研究了用于伽马和中子检测的 18 毫米 CLLBC 立方体在 − 20 °C 和 50 °C 之间的温度下的性能。此外，闪烁体与 SensL J 系列和 C 系列硅光电倍增管 (SiPM) 耦合以进行比较。在整个温度范围内，对于与 J 系列 SiPM 耦合的闪烁体，观察到更好的能量分辨率，这可归因于更高的光子检测效率。对于热中子探测，探测器的输出由波形数字化仪记录并在计算机上离线分析。为了区分中子和伽马，使用了脉冲形状鉴别技术。在所有温度下都观察到中子和伽马之间的良好分离。然而，在低温下将中子与本征 α 分离有些困难。尽管如此，这个 18 毫米 CLLBC 立方体是一种高性能闪烁体，适合部署在核安全和保障应用的辐射探测器中。