即そく発はつ中ちゅう性せい子し

noun

prompt neutron

Technical term in nuclear physics: a neutron emitted immediately during fission, as opposed to delayed neutrons.

• 即そく発はつ中ちゅう性せい子しは核かく分ぶん裂れつの際さいにほぼ瞬しゅん時じに放ほう出しゅつされる。

  Prompt neutrons are emitted almost instantaneously during nuclear fission.