Study the Attenuation Ability of γ-Rays Emitted from Co-60 Radioactive Isotope in PES/CaFe2O4 Composite Shields. Journal of the College of Basic Education, [S. l.], v. 26, n. 108, p. 466–479, 2022. DOI: 10.35950/cbej.v26i108.5213. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5213.. Acesso em: 20 jul. 2024.