The pure bulk aluminum and bulk 6061 aluminum alloy samples were used as
reference materials for comparison. In order to check the performance of the experimental set
up, the linear attenuation coefficients of aluminum were obtained from the measured incident
(I0) and transmitted (I) gamma-ray intensities using Equation (2.5), and compared with
theoretical data from American National Standard for Gamma-ray. It has been found out that
the values got from experimental results are in good agreement with the theoretical values.
The data is shown in Table 4.12.