Editing Neutron diffraction (section)

==== Fission ====
In research reactors, fission takes place when a fissile nucleus, such as [[uranium-235]] (<sup>235</sup>U), absorbs a neutron and subsequently splits into two smaller fragments. This process releases energy along with additional neutrons. On average, each [[Nuclear fission|fission]] event produces about 2.5 neutrons. While one neutron is required to maintain the [[chain reaction]], the surplus neutrons can be utilized for various experimental applications.<ref>{{Cite book |last=LEMBO |first=MARY FRANCES |title=Nuclear engineering |year=2006 |isbn=9780429224515 |pages=15}}</ref>