Natural uranium metal contains 99.3% Uranium-238. Its density is 19.05 g/cm^3. Consider a neutron of energy 2 KeV passing through this metal.
a). What is the most likely fate of such a neutron? Specify the reaction.
b). The probability of neutron absorption at this energy is about 10^-5 over a distance of 10^-6 m. What cross section (in barns) do you infer from these data?