All Problems Nuclear Reactions
Problem 6.281
A narrow beam of thermal neutrons is attenuated \(\eta=\) \(=360\) times after passing through a cadmium plate of thickness \(d=0.50 \mathrm{~mm} .\) Determine the effective cross-section of interaction of these neutrons with cadmium nuclei.
6.281. \(\sigma=(M / N \rho d) \ln \eta=2.5 \mathrm{~kb},\) where \(M\) is the molar mass of cadmium, \(N\) is the Avogadro number, \(\rho\) is the density of cadmium.