硼酸钆锂晶体碎片在闪烁和非闪烁塑料基质中的比较
Comparison of Lithium Gadolinium Borate Crystal Shards in Scintillating and Nonscintillating Plastic Matrices
摘要：
我们提出了一种方法，用于检测中子使用的硼酸钆锂晶体碎片在塑料基体中，同时保持高的γ抑制。我们采购了两个圆柱形检测器，5”\times 5”，含有1%质量晶体。晶体碎片的典型尺寸为1 mm。一个探测器由可固化塑料制成，另一个由不可固化塑料制成。脉冲形状分析用于剔除伽马射线背景。经测量，闪烁探测器的固有快裂变中子效率为0.4%，伽马灵敏度小于2.3 \times 10-9，而非闪烁探测器的中子效率为0.7%，伽马灵敏度为（4.75 \pm 3.94）\times 10-9。我们确定，增加中子探测效率的一个因素，2将使检测器与缓和3 He管的竞争力，我们讨论了几个简单和直接的方法，获得或超越这样的改进。最后，我们讨论了可能的应用，无论是塑料和非塑料探测器。
英文摘要：
We present a method for detecting neutrons using scintillating lithium gadolinium borate crystal shards in a plastic matrix while maintaining high gamma rejection. We have procured two cylindrical detectors, 5"\times5", containing 1% crystal by mass. Crystal shards have a typical dimension of 1 mm. One detector was made with scintillating plastic, and one with nonscintillating plastic. Pulse shape analysis was used to reject gamma ray backgrounds. The scintillating detector was measured to have an intrinsic fast fission neutron efficiency of 0.4% and a gamma sensitivity of less than 2.3 \times 10-9, while the nonscintillating detector had a neutron efficiency of 0.7% and gamma sensitivity of (4.75\pm3.94)\times10-9. We determine that increasing the neutron detection efficiency by a factor of 2 will make the detector competitive with moderated 3He tubes, and we discuss several simple and straightforward methods for obtaining or surpassing such an improvement. We end with a discussion of possible applications, both for the scintillating-plastic and nonscintillating-plastic detectors.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
