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<p>This study employs a High-Purity Germanium (HPGe) detector to analyse the activity concentrations of primordial radionuclides U-238, Th-232, and K-40 in the agricultural soils of the West Jaintia Hills District, Meghalaya, India, adjacent to the Dawki fault. The measured U-238 activity varied from 36.5 ± 3.1 to 57.4 ± 4.8&#xa0;Bq/kg, averaging 47.2 ± 3.5&#xa0;Bq/kg. The Th-232 activity elevated from 43.4 ± 3.2 to 54.5 ± 3.2&#xa0;Bq/kg, with a mean of 48.1 ± 3.3&#xa0;Bq/kg, which exceeds the worldwide mean. The measured K-40 activity ranged from 114.78 ± 9.6 to 150.25 ± 9.9&#xa0;Bq/kg, with an average of 132.7 ± 9.7&#xa0;Bq/kg. The findings indicate that the radiation risk associated with U-238 and Th-232 concentrations is elevated, whereas K-40 concentrations are within permissible limits. The evaluation provides crucial information on the radiation dosage levels at the location and their impact on public health.</p>

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Gamma spectrometric assessment of natural radioactivity in soils along the Dawki fault, Meghalaya, India

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • C. G. Poojitha,
  • A. Pyngrope,
  • S. Nongrum,
  • P. Rama,
  • B. K. Sahoo

摘要

This study employs a High-Purity Germanium (HPGe) detector to analyse the activity concentrations of primordial radionuclides U-238, Th-232, and K-40 in the agricultural soils of the West Jaintia Hills District, Meghalaya, India, adjacent to the Dawki fault. The measured U-238 activity varied from 36.5 ± 3.1 to 57.4 ± 4.8 Bq/kg, averaging 47.2 ± 3.5 Bq/kg. The Th-232 activity elevated from 43.4 ± 3.2 to 54.5 ± 3.2 Bq/kg, with a mean of 48.1 ± 3.3 Bq/kg, which exceeds the worldwide mean. The measured K-40 activity ranged from 114.78 ± 9.6 to 150.25 ± 9.9 Bq/kg, with an average of 132.7 ± 9.7 Bq/kg. The findings indicate that the radiation risk associated with U-238 and Th-232 concentrations is elevated, whereas K-40 concentrations are within permissible limits. The evaluation provides crucial information on the radiation dosage levels at the location and their impact on public health.