Optimization of radiation shielding design for 13 MeV cyclotron using K-500 concrete, paraffin, and lead. Mal. J. Fund. Appl. Sci. [Internet]. 2020 Dec. 28 [cited 2026 Sep. 16];16(6):654-7. Available from: https://mjfas.utm.my/index.php/mjfas/article/view/1148