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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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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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
- Natural radioactivity
- Depth profiles
- Gamma spectrometry