40. .. Moderating a Neutron In a nuclear reactor, neutrons re-leased by nuclear fission must be slowed down before they cantrigger additional reactions in other nuclei. To see what sort ofmaterial is most effective in slowing (or moderating) a neutron,calculate the ratio of a neutron's final kinetic energy to its ini-tial kinetic energy, K₁/K₁, for a head-on elastic collision witheach of the following stationary target particles. (Note: Themass of a neutron is m = 1.009 u, where the atomic mass unit,u, is defined as follows: 1 u = 1.66 × 10−²7 kg.) (a) An electron(M = 5.49 × 10¯4u). (b) A proton (M = 1.007 u). (c) The nu-cleus of a lead atom (M = 207.2 u).

Given data : Mass of neutron m = 1.009u Mass of electron m = 5.49 × 10-4 u Mass of proton m =…

Answered: 40. .. Moderating a Neutron In a…

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