A beam of 10 MeV gamma rays is incident on a block of aluminum that is...

Question

Question

A beam of 10 MeV gamma rays is incident on a block of aluminum that is 44.4 cm thick. What fraction of the gamma rays penetrates the block?

Answer 1

Answer #1

from above figure at incident energy of 10 Mev that is 10⁷ absorption coeffecient is 6*10^-2 = .06/cm

therefor .94 fraction of incident rays will cross 1 cm of aluminium block..

therefor for 44.4 cm ...fraction of incident rays that will cross it = .94^(44.4) = > 0.064

Answer 2

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