DEVELOPMENT OF A QUASI-MONOENERGETIC NEUTRON FIELD USING THE 7LI(P, N)7BE REACTION IN THE 70-210 MEV ENERGY RANGE AT RIKEN
DEVELOPMENT OF A QUASI-MONOENERGETIC NEUTRON FIELD USING THE 7LI(P, N)7BE REACTION IN THE 70-210 MEV ENERGY RANGE AT RIKEN
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RIKEN 利用 7LI(P, N)7BE 反应在 70-210 MEV 能量范围内开发准单能中子场
DOI：
10.1016/s0168-9002(98)01146-2
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发表时间：
1999
影响因子：
1.4
通讯作者：
T. Kurosawa
中科院分区：
文献类型：
--
作者：
N. Nakao;Y. Uwamino;Takashi Nakamura;T. Shibata;N. Nakanishi;M. Takada;Eunju Kim;T. Kurosawa
利用7 Li（p，n）7 Be反应，在日本化学研究所环形回旋加速器装置上建立了一个准单能中子场，能量范围为70 ~ 210 MeV。用加速到70、80、90、100、110、120、135、150、210 MeV的质子注入10 mm厚的7 Li靶产生中子。用飞行时间法测量了NE 213有机液体闪烁体中子能谱。用~ 7 Li（p，n）~ 7 Be（g.s.+）测量了~ 7 Li靶产生的~ 7 Be核的478 keV γ射线，获得了绝对峰值中子产额0.429MeV）反应。在辐照实验中，沿中子束线沿着安装了两个相对中子注量监测器，并通过7 Be测量对相对中子注量监测器的绝对峰值中子注量进行了校准。这种高能中子场对于中子截面测量、中子探测器响应测量和屏蔽实验都是非常有用的。
A quasi-monoenergetic neutron field was developed using the7Li (p,n)7Be reaction in the energy range from 70 to 210MeV in the ring cyclotron facility at RIKEN. Neutrons were generated from a 10-mm-thick7Li target injected by protons accelerated to 70, 80, 90, 100, 110, 120, 135, 150, 210MeV. The neutron energy spectra were measured with an NE213 organic liquid scintillator using the TOF method. The absolute peak neutron yields were obtained by measurements of 478keV γ-rays from7Be nuclei produced in a7Li target through the7Li (p,n)7Be (g.s.+0.429MeV) reaction. Two relative neutron fluence monitors, which were calibrated to the absolute peak neutron fluences by the7Be measurement, were equipped along the neutron beam line during an irradiation experiment. This high-energy neutron field is very useful for neutron cross-section measurements, response measurements of neutron detectors, and shielding experiments.