The mean specific activities of 238 U, 226 Ra in the soil of bone coal mine area are 0.37 kBq/ kg and 0.24 kBq/ kg, which are 8 times and 5 times highter than the average background value for the five provinces, respectively.

  • 土壤中238U和226Ra的平均比活度分别为0.37kBq/kg和0.24kBq/kg,为全国本底调查的五省平均值的8倍和5倍;

  • 互联网摘选 2025-01-20 17:46:25

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