Shielding performance of six different types of concrete in proton therapy room
XU Zhiqiang, GENG Jiwu, JIA Yuxin, ZHANG Zaoqin, WANG Meixia
中国辐射卫生 . 2022, (2): 144 -148 .  DOI: 10.13491/j.issn.1004-714X.2022.02.002