Sealed Source Test - QUESTION 3

Which of the following is the most effective shielding material for gamma-emitters?

a.  No shielding is needed (because gammas do not interact effectively with matter)

b.  1" thick Plexiglas (to minimize the production of bremsstrahlung radiation)

c.  1" thick Lead (because dense materials increase the probability of interaction)

d.  1" thick concrete (because hydrogenous materials slow gammas)

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