| 单词 | decay |
| 释义 | decay The spontaneous transformation of one radioactive nuclide into a daughter nuclide, which may be radioactive or may not, with the emission of one or more particles or photons. The decay of No nuclides to give N nuclides after time t is given by N = N0exp(-γt) , where γ is called the decay constant or the disintegration constant . The reciprocal of the decay constant is the mean life . The time required for half the original nuclides to decay (i.e. N =½N0 ) is called the half-life of the nuclide. The same terms are applied to elementary particles that spontaneously transform into other particles. For example, a free neutron decays into a proton and an electron (see beta decay). See also alpha particle; Q-value |
| 随便看 |
|
物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。