Q25
Effective moderators are those materials which contain
A.
Light weight atoms
AnswerB.
Heavy weight atoms
C.
Critical atoms
D.
Zero weight atoms
Answer: Option A
Solution
Answer: Option A
Solution:
Moderators are made from materials with light nuclei which do not absorb the neutrons but rather slow them down by a series of collisions. Carbon in the form of graphite is a material used for moderators as is heavy water which is Deuterium an isotope of Hydrogen with an atomic mass of 2 bonded to Oxygen.