罕见的地表低辐射水平区域:珊瑚礁区

Abstract

Abstract: Radioactivity levels are rarely investigated in coral reefs compared to the land. In this study, the average radioactivity levels of ²³⁸U, ⁴⁰K, ²²⁸Ra and ²²⁶Ra were measured by High Purified Germanium (HPGe) γ spectrometry and found to be 28.96 Bq/kg, 24.36 Bq/kg, 5.08 Bq/kg, 3.34 Bq/kg respectively in marine sediments collected from coral reefs of the South China Sea (SCS).The environmental radiation quality was assessed by several indexes which was found to be significantly lower than the international recommended values. A comparison with marine sediments from other sea areas of China, the average of China, and the world average indicated that radium equivalent activity of coral reefs was only ~10% and ~1‰ of the world average and the high background radiation area (HBRA), respectively. Coral reefs have a unique feature of extremely low radioactivity in the surface of the earth.

Key words: coral reefs, radionuclide, low radioactivity, South China Sea

CLC Number:

X834

LIN Wuhui, YU Kefu, WANG Yinghui, LIU Xinming, WANG Jianjun, NING Qiuyun, LI Yinghua. Unusual low radiation area on the surface of the earth: coral reefs[J].RADIATION PROTECTION, 2018, 38(4): 287-291.

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Unusual low radiation area on the surface of the earth: coral reefs

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