Q4 of 269 Page 156

State whether the fission of uranium-235 is caused by low energy neutrons or high energy neutrons.

The fission of uranium-235 is caused by low energy neutrons because a fast neutron will not be captured, so neutrons must be slowed down by moderation to increase their capture probability in fission reactors.


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2

Which product of the nuclear fission of uranium-235 is utilized to cause further fission of its nuclei?

 3

Which particles bring about the fission of uranium-235?

 5

Name the type of nuclear reaction which is involved in the working of:

(a) A hydrogen bomb.


(b) An atom bomb.

 6

Name the moderator used in a nuclear reactor.