自发衰变的英文

spontaneous decay

spontaneous disintegration

• 自发:    spontaneous
• 衰变:    decay; disintegrat ...
• 缓发衰变:    delayed decay

例句与用法

1. Radioactivity refers to the phenomenon of emitting ionizing radiation when a radionuclide spontaneously disintegrates
   二放射性：指核种自发衰变时释出游离辐射之现象。