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Neutrons that have been slowed down by a moderator are unable to induce rapid fission in...

Neutrons that have been slowed down by a moderator are unable to induce rapid fission in 238U nuclei. Why?


Which statements are true: (a) magic numbers are: 2, 8, 32, 50, 72, 98 (b) magic numbers are: 2, 8, 20, 28, 50, 82, 126 (c) magic numbers are: 2, 8, 20, 34, 68, 80, 102 (d) the binding energy for nuclei with magic numbers of neutrons and protons is particularly small. (e) the binding energy for nuclei with magic numbers of neutrons and protons is particularly large.
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