Damak Multiple Campus, Tribhuvan University, Damak, Nepal.
Central Department of Physics, Tribhuvan University, Kirtipur, Nepal.
Radiat Prot Dosimetry. 2024 Apr 4;200(5):429-436. doi: 10.1093/rpd/ncad324.
This study was conducted to investigate the activity concentrations of 226Ra, 232Th and 40K in the sand samples and the health hazards associated with them utilizing a NaI (Tl) gamma spectrometer. The average activity concentrations of 226Ra, 232Th and 40K were found to be 24.8 ± 10.1, 39.8 ± 16.4 and 531.3 ± 52.8 Bq kg-1, respectively. The calculated radiological hazard parameters, including radium equivalent activity, absorbed gamma dose and effective dose rate, were found to be 122.7 ± 34.0 Bq kg-1, 57.7 ± 14.9 nGy h-1 and 0.3 ± 0.1 mSv y-1, respectively. Notably, these results were observed to be below the recommended thresholds. Other measured hazard indices were also lower than the prescribed values. From a radiological perspective, the present study concludes that the sand samples do not pose any threat to human health when utilized as a building material.
本研究旨在利用 NaI(Tl) 伽马谱仪调查沙样中 226Ra、232Th 和 40K 的活度浓度及其相关健康危害。结果表明，226Ra、232Th 和 40K 的平均活度浓度分别为 24.8±10.1、39.8±16.4 和 531.3±52.8 Bq kg-1。计算得出的辐射危害参数包括镭当量活度、吸收伽马剂量和有效剂量率，分别为 122.7±34.0 Bq kg-1、57.7±14.9 nGy h-1 和 0.3±0.1 mSv y-1。值得注意的是，这些结果均低于推荐阈值。其他测量的危害指数也低于规定值。从辐射角度来看，本研究认为沙样作为建筑材料使用不会对人体健康造成威胁。
