Journal of Radiation Safety and Measurement

Journal of Radiation Safety and Measurement

Measuring the buildup factor of gamma rays flux of cesium and cobalt sources in aluminum, copper and lead metals as protective material

Document Type : Original Article

Authors
Ammar Vahedian Movahed 1
Hossein Tavakoli-Anbaran 2
1 Faculty of Physics and Nuclear Engineering, Shahrood University of Technology, Shahrood, Iran
2 دانشگاه صنعتی شاهرود، دانشکده فیزیک
10.22052/rsm.2024.255094.1071
Abstract
In this research, aluminum, copper, and lead metals have been used as protective materials against gamma rays at energies of 0.662 MeV, 1.173 MeV, 1.332 MeV. the higher the gamma ray energy, the more damage it causes to human tissue. Lead is a toxic substance and its density is high, but aluminum is a non-toxic substance and its density is lower than copper and lead. When making clothing to protect against harmful radiation, the lower the weight of the clothing , the better because the personnel who use such clothing are less tired. In a range of gamma ray energy, the attenuation effect of aluminum and lead is almost equal to each other, and on the other hand, since aluminum is lighter than lead, it is possible to use a combined shield of aluminum and lead, which leads to a lighter shield. in fact, gamma rays in this energy range are first transferred to the low energy region by successive Compton scatterings, and if they have not yet exited the material, lead atoms are absorbed. Therefore, the comined protection leads to significant weight reduction. In this research, experimental and simulation data have been compared and they are in good agreement. MCNPX code is used to calculate the simulation data.
Keywords
buildup factor
gamma ray
protection
cesium source
cobalt source
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