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Question
235U is readily made fissionable by a thermal neutron but 238U is not because:A) the neutron has a smaller binding energy in 236U
B) the neutron has a smaller excitation energy in 236U
C) the potential barrier for the fragments is less in 239U
D) the neutron binding energy is greater than the barrier height for236U and less than the barrier height for 239U
E) the neutron binding energy is less than the barrier height for 236U and greater than the barrier height for 239U
Answer
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