Neutron detection efficiency of the Neutron dEtector with Xn Tracking (NEXT)

Neutron detection efficiency of the Neutron dEtector with Xn Tracking (NEXT)
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带 Xn 跟踪 (NEXT) 的中子探测器的中子探测效率

DOI:
10.1016/j.nima.2021.165881
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发表时间:
2021
期刊:
Detectors and Associated Equipment
影响因子:
--
通讯作者:
Alberty-Jones, Y.
Alberty-Jones, Y.
中科院分区:
--
文献类型:
--
作者:
Neupane, S.;Heideman, J.;Grzywacz, R.;Hooker, J.;Jones, K.L.;Kitamura, N.;Thornsberry, C.R.;Heilbronn, L.H.;Rajabali, M.M.;Alberty-Jones, Y.

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对于β延迟中子辐射为主要衰变模式的丰中子核的衰变,需要一个具有良好能量分辨率的高效中子探测系统来正确表征。具有Xn跟踪的中子探测器(NEXT)被设计用于测量β延迟的中子发射器。通过沿着中子飞行路径分割探测器,NeXT减少了中子飞行时间测量中的相关不确定度,在保持探测效率的同时提高了能量分辨率。探测器原型由耦合到位置敏感光电倍增管的中子-伽马识别塑料闪烁体的光学分离部分组成。该探测器的首次性能研究表明,在保持良好的能量分辨率的同时,可以获得高的本征中子探测效率。给出了利用直接反应产生的中子进行效率测量的结果。
An efficient neutron detection system with good energy resolution is required to correctly characterize decays of neutron-rich nuclei where β-delayed neutron emission is a dominant decay mode. The Neutron dEtector with Xn Tracking (NEXT) has been designed to measure β-delayed neutron emitters. By segmenting the detector along the neutron flight path, NEXT reduces the associated uncertainties in neutron time-of-flight measurements, improving energy resolution while maintaining detection efficiency. Detector prototypes are comprised of optically separated segments of a neutron-gamma discriminating plastic scintillator coupled to position-sensitive photomultiplier tubes. The first performance studies of this detector showed that high intrinsic neutron detection efficiency could be achieved while retaining good energy resolution. The results from the efficiency measurements using neutrons from direct reactions are presented.
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