广东省部分地区土壤放射性核素的测定和剂量评估
杨剑洲, 龚晶晶, 唐世新, 胡树起

The determination of radioactivity concentrations in soil samples and dose assessment in parts of Guangdong Province
Jian-Zhou YANG, Jing-Jing GONG, Shi-Xin TANG, Shu-Qi HU
图3 不同岩石背景、地貌类型、土壤类型中样品238U、232Th、226Ra和40K比活度箱图
Fig.3 Boxplots for 238U,232Th,226Ra and 40K(Bq/kg) in samples of bedrock, geomorphic landscape and soil type, respectively