Neutron Irradiation Effects on Boron Nitride-Based Ceramics for Use in X-ray Detection
Neutron Irradiation Effects on Boron Nitride-Based Ceramics for Use in X-ray Detection
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DOI：
10.1021/acsami.3c05953
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发表时间：
2023-07-11
影响因子：
9.5
通讯作者：
Lin，Qianqian
中科院分区：
文献类型：
--
作者：
Chen，Zhiyuan;Yang，Yujie;Lin，Qianqian
基于传统大原子序数半导体的X射线探测器在高剂量率电离辐射下稳定性较差。在这项工作中，我们证明了具有小原子序数的宽带隙陶瓷氮化硼可用于灵敏的 X 射线检测。氮化硼样品表现出优异的抗电离辐射性能，这已通过中子和电子老化实验进行了系统研究。然后，我们充分分析了这些时效效应对氮化硼基本性能的影响。有趣的是，我们发现氮化硼样品即使在大剂量中子辐照后仍能保持相对良好的电荷传输性能。制造的 X 射线探测器表现出良好的性能指标，中子老化氮化硼甚至在连续 X 射线照射下表现出更高的操作稳定性，这表明实际应用的巨大潜力。
X-ray detectors based on conventional semiconductors with large atomic numbers are suffering from the poor stability under a high dose rate of ionizing irradiation. In this work, we demonstrate that a wide band gap ceramic–boron nitride with small atomic numbers could be used for sensitive X-ray detection. Boron nitride samples showed excellent resistance to ionizing radiation, which have been systematically studied with the neutron- and electron-aging experiments. Then, we fully analyzed the influence of these aging effects on the fundamental properties of boron nitride. Interestingly, we found that the boron nitride samples could maintain relatively good charge transport properties even after large dose of neutron irradiation. The fabricated X-ray detectors showed decent performance metrics, and the neutron-aged boron nitride even showed improved operational stability under continuous X-ray irradiation, suggesting the great potential for real applications.