Time-of-flight measurement for low-energy components of 45-MeV quasi-monoenergetic high-energy neutron field from 7Li(p,n) reaction
Time-of-flight measurement for low-energy components of 45-MeV quasi-monoenergetic high-energy neutron field from 7Li(p,n) reaction
复制标题
7Li(p,n)反应45 MeV准单能高能中子场低能成分的飞行时间测量
DOI：
10.1109/tns.2015.2432273
复制
发表时间：
2015
影响因子：
1.8
通讯作者：
H. Seito
中科院分区：
文献类型：
--
作者：
A. Masuda;T. Matsumoto;H. Harano;Y. Tanimura;Y. Shikaze;H. Yoshitomi;S. Nishino;S. Kurashima;M. Hagiwara;Y. Unno;J. Nishiyama;M. Yoshizawa;H. Seito
反应产生的准单能中子场由高能单能峰和低能区的连续谱组成。在这项研究中，光谱通量的连续测量与飞行时间（TOF）的方法，使用玻璃闪烁探测器和有机液体闪烁探测器的keV和MeV区域，分别。通过实施一种新的束流斩波系统，中子能谱注量被确定到keV区域，结果表明，直接来自靶的中子具有约100 keV的能量下限。还讨论了与时间无关的中子（假定为房间散射中子）的影响。所获得的信息有望有助于理解准单能高能中子场和改进现场校准中子探测器。
A quasi-monoenergetic neutron field generated in thereaction consists of a high-energy monoenergetic peak and a continuum to the low-energy region. In this study, the spectral fluence of the continuum was measured with the time-of-flight (TOF) method using a-glass scintillation detector and an organic liquid scintillation detector for the keV and MeV region, respectively. The neutron spectral fluence was determined down to the keV region by implementing a new beam chopping system and the results showed that the neutrons that came directly from the target had a lower energy limit about 100 keV. Discussions were made also on the effect of the time-independent neutrons which are assumed to be room-scattered neutrons. The obtained information is expected to contribute to understanding the quasi-monoenergetic high-energy neutron field and improvements of calibrating neutron detectors in the field.