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Glossary term: 中微子

Description: 中微子是由多种物理过程产生的亚原子粒子。在太阳的核心,中微子是核聚变的产物。超新星爆炸中的核反应和高能量密度也会产生中微子爆发。由于中微子与原子的相互作用极其微弱,观测它们非常困难。通常我们会通过巨大的水箱(或如南极冰立方中微子天文台使用的冰块)来探测中微子。当中微子撞击这些水箱中的水分子(或冰块中的分子)时,会引发粒子反应,产生微量的光。这些光可以被探测器捕捉并进行分析。目前已经从太阳核心的核反应和超新星中探测到中微子。此外,中微子也会由核反应堆和人体产生。在人体中,中微子来自于放射性原子核如碳-14和钾-40的衰变过程。

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