论文标题
中子共振传输分析与紧凑的氘中子发生器
Neutron Resonance Transmission Analysis with a Compact Deuterium-Tritium Neutron Generator
论文作者
论文摘要
中子共振传递分析（NRTA）是一种光谱技术，它使用表皮范围内中子的谐振吸收来推断对象的同位素组成。这种光谱技术在许多传统的科学和核安全领域都具有相关性。过去，NRTA利用大型昂贵的加速器设施来实现精确的中子梁，从而大大限制了其适用性。在这项工作中，我们描述了一系列的NRTA实验，其中我们使用紧凑的低成本氘 - 三位生（DT）中子发生器，以产生短中子束（2.6〜m），以及$^6 $ li-li-glass中子探测器。来自五个元素的飞行时间频谱数据 - 银，镉，钨，indium和$^{238} $ U-清楚地显示了1-30 eV范围内的相应吸收线。该实验显示了NRTA在这种简化的配置中的适用性，并证明了这种紧凑和低成本方法的可行性。这可以显着扩大NRTA的适用性，并使其在许多领域（例如材料科学，核工程和武器控制）中实用和适用。
Neutron Resonance Transmission Analysis (NRTA) is a spectroscopic technique which uses the resonant absorption of neutrons in the epithermal range to infer the isotopic composition of an object. This spectroscopic technique has relevance in many traditional fields of science and nuclear security. NRTA in the past made use of large, expensive accelerator facilities to achieve precise neutron beams, significantly limiting its applicability. In this work we describe a series of NRTA experiments where we use a compact, low-cost deuterium-tritium (DT) neutron generator to produce short neutron beams (2.6~m) along with a $^6$Li-glass neutron detector. The time-of-flight spectral data from five elements -- silver, cadmium, tungsten, indium, and $^{238}$U -- clearly show the corresponding absorption lines in the 1-30 eV range. The experiments show the applicability of NRTA in this simplified configuration, and prove the feasibility of this compact and low-cost approach. This could significantly broaden the applicability of NRTA, and make it practical and applicable in many fields, such as material science, nuclear engineering, and arms control.
