Abstract A real-time neutron detector was developed to measure an intense neutron beam, based on both a thin silicon sensor and an extremely thin neutron converter for boron neutron capture therapy (BNCT). Neutron response function and detection efficiency were evaluated at the BNCT facility. The response function consists of neutron events, detecting both Triton particles produced from the 6Li (n,t)4He reaction and alpha particles from the 10B (n,α)7Li reaction. The detector is able to clearly separate the BNCT neutron beam from coexisted gamma rays. A depth distribution of slow neutron flux in an acrylic block was experimentally obtained. While the relative depth distribution of over 20 mm in depth is in line with the results of the neutron activation measurements of gold, the absolute values are around 17% smaller than the corresponding neutron activation results, which was due to the incomplete evaluation of the neutron detection efficiency and angular-dependent response of the neutron detector.

中文翻译：

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使用薄硅二极管表征用于硼中子俘获疗法的实时中子探测器

摘要 基于薄硅传感器和用于硼中子俘获疗法（BNCT）的极薄中子转换器，开发了一种实时中子探测器来测量强中子束。在 BNCT 设施中评估了中子响应函数和探测效率。响应函数由中子事件组成，检测 6Li (n,t)4He 反应产生的 Triton 粒子和 10B (n,α)7Li 反应产生的 α 粒子。探测器能够清楚地将 BNCT 中子束与共存的伽马射线区分开来。通过实验获得了丙烯酸块中慢中子通量的深度分布。虽然深度超过 20 毫米的相对深度分布与金的中子活化测量结果一致，