Physics — Nuclear Fission & Fusion

{}^{235}\text{U} + n \rightarrow \text{fragments} + 2\text{-}3\,n + E

{}^{2}\text{H} + {}^{3}\text{H} \rightarrow {}^{4}\text{He} + n + 17.6\ \text{MeV}

E = \Delta m\,c^2

\text{fusion: light nuclei; fission: heavy nuclei}