Um, U235 is fissile uranium, depleted is U238.
Hit U238 with a slow moving neutron and it will be U239 for a few microseconds and then a neutron will decay, kick off 5 gamma units, 3 beta particles and 2 alpha particles.
The product of the neutron decay is a proton and another orbiting electron thus it becomes Pu239.
The isotopes U236 & U237 also exist for a few microseconds each when the occasional U238 kicks off a neutron.
(4 years working in a nuclear fuel rod manufacturing plant)