A beam of 0.38 MeV neutrons is incident on a 113Cd foil of thickness 1mm. The absorption
cross-section for 0.38 MeV neutrons is 5 barns. What is the fraction of neutrons absorbed by the foil?
The Attempt at a Solution
I'm not sure whether I should treat this as scattering in a thick or thin foil and how the energy of the incoming particles is related to the total scattering of particles.