Which of the following is the best neutron mo | vedclass

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(D) neutron moderator is a medium that reduces the speed of fast neutrons,typically emitted from nuclear fission,so they can sustain a chain reaction.

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Heavy water

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(D) neutron moderator is a medium that reduces the speed of fast neutrons,typically emitted from nuclear fission,so they can sustain a chain reaction. Heavy water $(D_2O)$ is considered the most efficient neutron moderator because it has a very low neutron absorption cross-section compared to ordinary water $(H_2O)$ and graphite. While ordinary water is an effective moderator,it absorbs more neutrons than heavy water,making heavy water superior for maintaining a nuclear chain reaction in reactors using natural uranium.

Which of the following is the best neutron moderator compared to all others?

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