A chain reaction grows when the average number of liberated neutrons that go on to cause further fissions is
A)zero.
B)less than one.
C)one.
D)greater than one.

Question

Quizplus · Accepted Answer

For a chain reaction to sustain itself, the average number of neutrons produced per fission (referred to as the neutron multiplication factor, k) needs to be greater than one. This means that on average, each fission event leads to the production of more than one neutron, which can go on to cause further fissions and thus continue the chain reaction.

A Chain Reaction Grows When the Average Number of Liberated