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Neutrons are born out of fission at a high energy and must be slowed down to...

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Physics

Neutrons are born out of fission at a high energy and must beslowed down to the low energy region, called the “thermal energy”region, to cause another fission. A material called a “moderator”is used to slow the neutrons down, or “moderate” them, by elasticscattering collisions.The average neutron energy coming out offission of thermal neutrons is 1.98 MeV in kinetic energy. What isthe number of collisions required to bring its average kineticenergy to 0.1 eV if it elastically scatters off of the followingmoderators:

a. Hydrogen-1

b. Hydrogen-2

c. Carbon-12

d. Uranium-238

Answer & Explanation Solved by verified expert
3.9 Ratings (605 Votes)
Consider the moderator material to be We now assume that themoderator is initially not moving but after a collision gets avery small momentum although thats not necessary but otherwisewe    See Answer
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