“ultrocold neutron”的概念、定义、翻译、参考文献-科学参考

单词	ultrocold neutron
释义	ultrocold neutron Encyclopedia 理学中子物理释 ultrocold neutron超冷中子动能小于3×10-7电子伏的中子。用温度作低能区中子能量范围划分的一种习惯说法。超冷中子速度小于8米/秒，相应介质温度小于4毫开。
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