熱ねつ中ちゅう性せい子し

noun

thermal neutron

Technical term in nuclear physics for a neutron in thermal equilibrium with its surroundings, typically with kinetic energy around 0.025 eV at room temperature.

• 熱ねつ中ちゅう性せい子しは原げん子し炉ろ内ないで核かく分ぶん裂れつを引ひき起おこすのに使つかわれる。

  Thermal neutrons are used to induce nuclear fission in a reactor.