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. Jurnal Engine: Energi, Manufaktur, dan Material, [S. l.], v. 9, n. 2, p. 237–248, 2025. DOI: 10.30588/jeemm.v9i2.2339. Disponível em: https://ejournal.up45.ac.id/index.php/Jurnal_ENGINE/article/view/2339. Acesso em: 5 dec. 2025.