U233 and Pu239
U
U238 and Pu239
U238 and Th239
the most fissionable material
the basic fuel for nuclear paints
basic raw material for nuclear plants
the material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
%age of U235 has been artificially increased
%age of U has been artificially increased
%age of U234 has been artificially increased
extra energy is pumped from outside
nucleus
electron
proton
meson
neutron
atom