DAEMON - Detector Array for Energy Measurement Of Neutrons

β衰变后中子谱的测量为核结构提供了信息，对宇宙中重元素丰度的计算产生了影响，也对反应堆燃料循环等实际应用产生了影响。快速中子能量的测量通常通过测量它们的飞行时间来执行。然而，这样的测量带来了重大挑战，并且在检测效率（其将通过使用厚检测器来优化）和能量分辨率（其通过使用薄检测器来优化）之间总是存在平衡。我们建议构建一个阵列的塑料闪烁器，探测器阵列的能量测量的中子（DAEMON），与GRIFFIN伽马射线光谱仪在TRIUMF-ISAC设施，使高分辨率测量的中子后β衰变的中子。该闪烁体阵列将由塑料棒组成，在其初始配置中，塑料棒的形状将适合DESCANT中子探测器-探测器的半球形外壳，占据大约25%的立体角。塑料中中子相互作用产生的闪烁光将用Si光电倍增管阵列检测，该光电倍增管阵列将通过商用专用集成电路（ASIC）读出。新阵列将提供TRIUMF-ISAC设施目前不存在的能力，通过飞行时间实现中子的高分辨率能量测量，同时，与DESCANT一起提供用于标记中子的高效设备，再加上强大的GRIFFIN光谱仪，提供无与伦比的伽马射线探测效率。这将为TRIUMF-ISAC的研究开辟新的途径，并将为更广泛的伽马射线光谱合作所进行的研究计划提供强有力的增强。我们进一步设想，由于这种新的能力，将发展强有力的国际合作。

Measurements of spectrum of neutrons following beta-decay provides information for both nuclear structure, has impacts on calculations for the abundance of heavy elements in the Universe, and also for practical applications such as reactor fuel cycles. Measurement of the energies of fast neutrons are typically performed by measuring their time of flight. Such measurements, however, pose significant challenges, and there is always a balance between detection efficiency, which would be optimized through the use of thick detectors, and energy resolution, optimized through the use of thin detectors. We propose to construct an array of plastic scintillators, the Detector Array for Energy Measurement Of Neutrons (DAEMON), to be used in conjunction with the GRIFFIN gamma-ray spectrometer at the TRIUMF-ISAC facility to enable high-resolution measurements of the neutrons following beta-decay of neutron-rich species. This scintillator array will be composed of plastic bars that, in their initial configuration, will be shaped to fit within the DESCANT neutron detector - a semi-spherical shell of detectors that occupy approximately 25% of the solid angle. The scintillation light produced from the neutron interactions in the plastic will be detected with Si photomultiplier arrays that will be read out via commercially available application-specific integrated circuits (ASICs). The new array will provide a capability that does not currently exist at the TRIUMF-ISAC facility enabling high-resolution energy measurements of the neutrons via time of flight, while simultaneously, with DESCANT, providing a high efficiency device for tagging on the neutrons, coupled with the powerful GRIFFIN spectrometer that provides unsurpassed gamma-ray detection efficiency. This will open new avenues of research at TRIUMF-ISAC and will provide a strong enhancement of the research program performed by the broader Gamma-Ray Spectroscopy collaboration. We further envision strong international collaborations to be developed as a result of this new capability.