Assertion: atom's nucleus | /r/CapableOf | undergo fission
Facets:
value: by slow neutrons
type: OTHER
Source sentences:
text: This is because U-235 nuclei also undergo fission by slow neutrons (U-238 nuclei require a minimum energy of about 1 mega-electron volt), and because these slower neutrons are produced by other fissioning U-235 nuclei in the jacket (in other words, U-235 supports the nuclear chain reaction whereas U-238 does not).