PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics
Problem
Each fission of 235U releases on average 2.5 neutrons. In a particular assembly, 85% of these neutrons cause further fission, 10% are absorbed without causing fission, and the rest escape. Calculate the average number of neutrons available to start the next generation of fission events.
(a) 2.25
(b) 2.13
(c) 1.88
(d) 2.38