... background monitoring 本底监测 background neutron 本底中子 background noise 背景噪声；基底噪声；本底噪声 ...
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neutron background survey [核] 中子本底检查
neutron background 中子本底
slow neutron background 慢中子本底
scatter neutron background 散射中子本底
natural neutron background 天然中子本底
A high sensitive neutron monitor is described in this paper. It has an approximate counting rate of 20 CPM for natural background neutrons.
本文介绍了一种高灵敏度中子监测器，它对天然中子本底的计数率约每分钟20次计数。
The first chapter has introduced the meaning and the background of neutron knife treatment system.
第一章是绪论。 介绍了中子刀治疗系统的背景、意义及本论文研究内容。
Some external neutron and gamma source experiments were carried out to study the origin of the background.
还应用外置伽玛源和中子源进行了实验，以判断本底的来源。
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