Damar Adhiwidya Suyanto, Aditya Tri Oktaviana, Yohannes Sardjono, Gede Sutresna Wijaya, Isman Mulyadi Triatmoko. The Simulation of Radiation Shielding Made of Portland Material in a 230 MeV 300 NA Cyclotron Room for Proton Therapy Facility Using PHITS Code System. JEEMM [Internet]. 2025 Nov. 21 [cited 2025 Dec. 5];9(2):237-48. Available from: https://ejournal.up45.ac.id/index.php/Jurnal_ENGINE/article/view/2339