单词 | radioactive decay |
释义 | radioactive decay [¦rād·ē·ō`ak·tiv di`kā] NUCLEAR PHYSICS The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. Also known as decay; nuclear spontaneous reaction; radioactive disintegration; radioactive transformation; radioactivity. |
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