EXPERIMENTAL INVESTIGATION OF THE NM-64 NEUTRON MONITOR,
EXPERIMENTAL INVESTIGATION OF THE NM-64 NEUTRON MONITOR,
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NM-64 中子监测仪的实验研究，
DOI：
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发表时间：
1964
期刊：
影响因子：
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通讯作者：
H. Carmichael
中科院分区：
文献类型：
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作者：
C. Hatton;H. Carmichael
对NM-64中子监测仪进行了综合性的实验研究。测量了计数率随反射器厚度、计数器间距、内慢化剂厚度和计数器气压的变化。结果表明，国际认可规范中给出的数字代表了令人满意的设计优化。NM-64监视器的计数率是IGY监视器的3.3倍。快中子和热中子在监测器内的起源和运动已经用镉片和通过研究在多个计数器中产生计数的事件进行了研究。
A comprehensive experimental study has been made of the NM-64 neutron monitor. The counting rate has been measured as a function of the thickness of the reflector, of the separation of the counters, of the thickness of the inner moderator, and of the gas pressure in the counters. It is shown that the figures given in the internationally approved specification represent a satisfactory optimization of the design. The counting rate of the NM-64 monitor is found to be 3.3 times that of an IGY monitor of the same horizontal area. The origin and movement of both fast and thermal neutrons within the monitor have been investigated using cadmium sheets and by studying events producing counts in more than one counter.