neutro U with a slow neutronThe 48 MeV binding energy of the neutron in 239U is not suf ID: 280930
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U excites the compoundnucleus - it distorts - Þrst scission and Þnally Þssion occurs.235U + n Þssion235U + neutro U with a slow neutron.The 4.8 MeV binding energy of the neutron in 239U is not sufÞcient toovercome the Þssion barrier - we get radiative capture: 238U(n,!)239U.238U + n - Þssion does not occur with a slow neutron.238U + energy 4.8 MeV.Neutron-induced Þssion239U* de-excites byemitting a gamma-rayRadioactive 239Uundergoe