isodiaphere /ˌaɪsəʊˈdaɪəˌfɪə/

• 1. 

  N one of two or more nuclides in which the difference between the number of neutrons and the number of protons is the same 等超额中子核素

  例：

  a nuclide that has emitted an alpha particle, and its decay product, are isodiapheres