Natural radionuclides distribution, depth profiles of caesium-137 and risk assessment for soil samples in west regions of China

Abstract

An analysis of natural radioactivity in soils collected around Chinese Nuclear Test site is presented. The radioactivities of 238U, 226Ra, 232Th, 40K, and 137Cs were determined by HPGe gamma-ray spectrometry, and potential radiological hazards were evaluated. The depth profiles of radionuclides in three selected areas of Gansu were analyzed, and a new method for detection of 137Cs specific activities were measured using ultra-low background gamma spectrometer named GeTHU-II developed by Tsinghua University at China Jinping Underground Laboratory. The radioactivity concentrations of 137Cs were significantly different in these three areas and gradually decreased from surface to underground 15 cm.

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Acknowledgements

The authors wish to express their gratitude to Gansu CDC, Xinjiang CDC and Tibet CDC for their assistance in collecting samples.

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Correspondence to Fei Tuo.

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Tuo, F., Peng, X., Zeng, Z. et al. Natural radionuclides distribution, depth profiles of caesium-137 and risk assessment for soil samples in west regions of China. J Radioanal Nucl Chem 327, 831–838 (2021). https://doi.org/10.1007/s10967-020-07551-5

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Keywords

  • Natural radioactivity
  • Depth profiles
  • Soil
  • 137Cs
  • Gamma spectrometry