【摘 要】
：
用6种阈探测器测得有无铝反射体时的绝对活化反应率,获得了铝材料的高能中子反射率,其值基本在1—1．14之间,变化趋势比较一致．结果表明:高能反射中子场在小角度测量点比较弱,而
【机 构】
：
中国工程物理研究院核物理与化学研究所,中国工程物理研究院核物理与化学研究所,中国工程物理研究院核物理与化学研究所,中国工程物理研究院核物理与化学研究所,中国工程物理研究院核物理与化学研究所,中国工程物
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用6种阈探测器测得有无铝反射体时的绝对活化反应率,获得了铝材料的高能中子反射率,其值基本在1—1．14之间,变化趋势比较一致．结果表明:高能反射中子场在小角度测量点比较弱,而在大角度测量点,尤其在120°点比较强．高能中子反射率随阈能的增大而变小．中子反射率的实验不确定度为3．4％—4．2％．模拟计算结果与实验结果在大多数点基本相符．
Using six kinds of threshold detectors, the absolute activation reaction rate with and without aluminum reflector was measured, and the high energy neutron reflectivity of aluminum material was obtained. The value of the reflectance was basically between 1 and 1.14, and the change tendency was consistent. The results show that the high-energy reflectance neutron field is relatively weak at the small angle, while at the large angle, especially at 120 °. High-energy neutron reflectivity decreases as the threshold energy increases. The experimental uncertainty of neutron reflectance is 3.4% -4.2%. The simulation results are in good agreement with the experimental results at most points.
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