为反向动力学测量设计中子靶的实验
Experiments towards a neutron target for measurements in inverse kinematics
AI总结：
本文通过实验验证了在石墨立方体中缓化溅射中子以创建静态中子靶的可行性，为反向动力学测量提供了原理验证测试。
摘要：
中子诱导反应在基本核物理、核天体物理和应用中起着重要作用。在稀有同位素反应的情况下，直接实验测量的选项有限。洛斯阿拉莫斯国家实验室的中子靶示范项目旨在测试将溅射中子在1立方米石墨立方体中缓化以创建静态中子靶，用于反向动力学中的中子诱导反应测量。本文介绍了使用由印第安纳大学和德克萨斯A&M大学加速器产生的中子源（从1 keV到50 MeV）进行的实验中子通量分布测试。测量使用完整的石墨立方体以及一个''半立方体''设置，其中移除了石墨立方体的一半。测量的分布与完整立方体缓化器的模拟分布一致，但在半立方体缓化器的情况下仍存在某些差异。本文展示的结果将为即将进行的实验计划提供有用的资料，以测试中子靶的原理验证。
英文摘要：
Neutron-induced reactions play an important role in fundamental nuclear physics, nuclear astrophysics, and applications. In the case of reactions on rare isotopes, there are limited options for direct experimental measurements. The Neutron Target Demonstrator project at Los Alamos National Laboratory seeks to test the feasibility of moderating spallation neutrons within a 1~m$^3$ graphite cube to create a standing neutron target for neutron-induced reaction measurements in inverse kinematics. This paper presents the results of experimental neutron flux distribution tests using neutron sources (ranging from 1~keV to 50~MeV) created by accelerators at the University of Notre Dame and Texas A\&M University. Measurements were made with both the full graphite cube as well as a ''half cube'' setup in which half of the graphite cube was removed. The measured distributions agree with simulated distributions in the case of the full cube moderator, although there remain discrepancies in certain cases for the half cube moderator. The results shown here will provide useful information for an upcoming experimental campaign to test the neutron target proof-of-principle.
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