• Sheela M
• Dr. K, M, Eshwarappa

In this study, the gamma-ray buildup factor was calculated for bismuth-filled high-density polyethylene composites at 662 keV and 1332 keV gamma radiations. The shielding material HDPE/Bi composites were fabricated using a hydraulic press for the different weight percentages (0%, 10%, 20%, and 40%) of bismuth filler in the HDPE matrix. The study of the buildup factor was carried out using a 3ʺ×3ʺ NaI(Tl) detector and 2k MCA for 662 keV and 1332 keV. The results show that the buildup factor increases with the increase in the thickness of the sample has lesser values at higher energies, and also decreases as the concentration of bismuth filler increases in the shielding material.

: Buildup factor, gamma-ray energy, thickness, density, geometry.

"Gamma ray buildup factor of bismuth filled high-density polyethylene composites for narrow source geometry ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 7, page no.h597-h602, July-2023, Available :http://www.jetir.org/papers/JETIR2307772.pdf

"Gamma ray buildup factor of bismuth filled high-density polyethylene composites for narrow source geometry ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 7, page no. pph597-h602, July-2023, Available at : http://www.jetir.org/papers/JETIR2307772.pdf