Mahmoud A. Elawi. Mass Attenuation Coefficient Measurements of Photoelectric Absorption of Gamma-Rays in Copper Using Coincidence Technique. Tikrit J. Pure Sci. [Internet]. 2020 Aug. 2 [cited 2025 Jun. 17];25(4):80-5. Available from: https://tjpsj.org/index.php/tjps/article/view/275