Question

Americium-241 undergoes fission to produce three neutrons per fission event. If a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass

Answer 1

A ✔️

Step-by-step explanation:

Answer 2

A. Remove a deflective shield surrounding the sample.

Step-by-step explanation:

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