uranium - 235 undergoes fission to produce two neutrons per fission event. a neutron - absorbing material is…

uranium - 235 undergoes fission to produce two neutrons per fission event. a neutron - absorbing material is mixed in with this sample. this causes the number of neutrons that can initiate fission events to decrease. which of the following will be effective at achieving a critical mass? check all that apply.\nsurround the sample with a deflective material to prevent neutrons from escaping to the surroundings.\nadd more absorbent material.\ncompress the uranium - 235 sample.

uranium - 235 undergoes fission to produce two neutrons per fission event. a neutron - absorbing material is mixed in with this sample. this causes the number of neutrons that can initiate fission events to decrease. which of the following will be effective at achieving a critical mass? check all that apply.\nsurround the sample with a deflective material to prevent neutrons from escaping to the surroundings.\nadd more absorbent material.\ncompress the uranium - 235 sample.

Answer

Brief Explanations:

To achieve a critical mass, we need to increase the number of neutrons available for fission. Surrounding the sample with a reflective material reduces neutron escape, increasing the neutron - flux for fission. Compressing the uranium - 235 sample increases the density of uranium nuclei, making it more likely for neutrons to interact and cause fission. Adding more absorbent material would decrease the number of neutrons available for fission, so it is not effective.

Answer:

A. Surround the sample with a reflective material to prevent neutrons from escaping to the surroundings. C. Compress the uranium - 235 sample.