【摘要】 在考虑了中能重离子反应出射中子天空反射效应的基础上，以４×１０１１ｉｏｎｓ／ｓ、１００ＭｅＶ／ｕ１２Ｃ＋Ｃｕ（厚靶）反应为例，计算出重离子物理实验小区需设置的顶部屏蔽混凝土厚度ｄ＝１．１ｍ．更多还原

【Abstract】 Based on considering the skyshine and the distribution of neutrons emitted from the reaction of 100MeV/u 12 C+Cu, the concrete shielding thickness of overhead shielding of the small experimental area in the physical experimental hall is calculated, which would be about 1.1m.更多还原