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<p>This study developed and validated an in situ Full Spectrum Analysis (FSA) method using a NaI(Tl) detector for environmental radiation monitoring in Ho Chi Minh City. Mean activity concentrations of <sup>238</sup>U (21.8&#xa0;Bq&#xa0;kg⁻<sup>1</sup>) and <sup>232</sup>Th (33.8&#xa0;Bq&#xa0;kg⁻<sup>1</sup>) were near or below global averages, while <sup>40</sup>K (57.8&#xa0;Bq&#xa0;kg⁻<sup>1</sup>) was notably depleted. Anthropogenic <sup>137</sup>Cs was negligible. Derived radiological hazard indices, including an average outdoor annual effective dose of 0.04&#xa0;mSv y⁻<sup>1</sup>, were well within international safety limits. The findings confirm the method’s utility and indicate a low terrestrial gamma radiation risk in the surveyed urban areas.</p>

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In situ gamma ray spectrometry for environmental monitoring: Full Spectrum Analysis and dose assessment

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Thi Yen Hong Huynh,
  • Huu Ngan Thy Truong,
  • Thanh Thao Tran,
  • Ngoc Ba Vu

摘要

This study developed and validated an in situ Full Spectrum Analysis (FSA) method using a NaI(Tl) detector for environmental radiation monitoring in Ho Chi Minh City. Mean activity concentrations of 238U (21.8 Bq kg⁻1) and 232Th (33.8 Bq kg⁻1) were near or below global averages, while 40K (57.8 Bq kg⁻1) was notably depleted. Anthropogenic 137Cs was negligible. Derived radiological hazard indices, including an average outdoor annual effective dose of 0.04 mSv y⁻1, were well within international safety limits. The findings confirm the method’s utility and indicate a low terrestrial gamma radiation risk in the surveyed urban areas.