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Identification of clay minerals and depositional environment in soil at Ben Tre Province—South Vietnam was studied in this work by using laboratory HPGe gamma spectrometry through the evaluation of 232Th, 238U, 226Ra and 40K natural radionuclide distributions in soil versus depths. The calculated values of activity concentration ranged from 2.13 ± 0.13 to 6.64 ± 0.40 ppm for 238U, from 1.97 ± 0.12...
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