Identify the correct definition of "critical mass" for a fissile material.
PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics
Problem
Identify the correct definition of "critical mass" for a fissile material.
(a) The minimum amount of fissile material needed only to initiate a chain reaction but not sustain it
(b) The mass of fissile material at which the neutron multiplication factor k just falls below 1
(c) The minimum amount of fissile material required to sustain a self-maintaining fission chain reaction
(d) The quantity of fissile material beyond which the chain reaction becomes uncontrollably explosive