Neutrons released by a fi ssion reaction must be slowed by
Chapter , Problem 23(choose chapter or problem)
Neutrons released by a fi ssion reaction must be slowed by collisions with the moderator nuclei before the neutrons can cause further fi ssions. Suppose a 1.5-MeV neutron leaves each collision with 65% of its incident energy. How many collisions are required to reduce the neutrons energy to at least 0.040 eV, which is the energy of a thermal neutron?
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