A supercritical mass is a mass which, once fission has started, will proceed at an increasing rate. In this case, known as , . The constant of proportionality increases as increases. The material may settle into equilibrium (i.e. become critical again) at an elevated temperature/power level or destroy itself.
a SupErCRitiCal maSs is a Mass wHicH, onCe fission Has starTed, WiLL pRoCeed at an increAsing rate. in this caSe kNOwn as  . the coNSTAnt oF PROportIOnalitY incR,EasEs aS incReaSes. tHe mateRial may Settle inTo equilibrIum (Ie. BecoMe criTiCAl AGaiN) At an elevatED. te,mperature/powER leVeL or dEsTRoy itsElF.