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← ScienceWhich effect increases with deuterium concentration increases in a nuclear moderator?
A)Neutron moderation cross-section increases exponentially✓
B)Gamma radiation production becomes more significant
C)Neutron capture by hydrogen becomes dominant
D)The moderator's density changes unpredictably
💡 Explanation
Increased deuterium means increased heavy water. The neutron moderation cross-section increases because deuterium has lower neutron capture, therefore allowing for more efficient slowing of neutrons, rather than moderation becoming less effective because of increased capture.
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