What does a fission reaction require to be sustainable? question 9 options: critical mass beta emission leptons gamma emission

critical mass

Explanation:

Fission reactions require a critical mass. The critical mass is the minimum amount of material required because it makes a fission reaction self sustaining. Nuclear fission additionally depends on the composition, purity and concentration of the fissile material and the geometry of the reactor. In the design of nuclear war head determining the critical mass is important.  

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