The radioactive sources of Cs-137 and Co-60, each with the strength of 2 mCi and
1.2 mCi, were obtained from Nuclear Engineering Department at North Carolina State
University. Both sources were housed in a lead container during measurements.
The samples used in gamma-ray attenuation measurements were bulk pure aluminum,
bulk aluminum 6061 alloy, aluminum foams made from bulk aluminum 6101 alloy.
The samples were cut to a couple of slabs in the machine shop in Mechanical &
Aerospace Department at North Carolina State University, to obtain certain different
thicknesses for better comparisons of experimental results.
Dimensions and quantities of all the samples with different materials are listed in