The critical mass of a fissionable material can be reduced by__________________?
Correct answer: B. Surrounding it by neutron reflecting material
- A. Heating it
- B. Surrounding it by neutron reflecting material
- C. Cooling it
- D. Surrounding it by neutron absorbing material
Explanation
A neutron reflector sends escaping neutrons back into the fissile core, increasing the chance of further fission and lowering the mass needed for a chain reaction. Neutron absorbers have the opposite effect.
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