113 It is proposed to use 48 Cd as an attenuator in a nuclear pile. Calculate the thickness required to attenuate a neutron beam to 0.01% of its original intensity if it has density of 8.7* 10 3 kg/m^3 and a crossection of 2.1* 10^4 barns
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a) 95 μm b) 90 μm c) 85 μm d) 80 μm
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