Department of Physics, Oriental College Imphal, Imphal, Manipur 795001, India.
Radiological Safety Division, Atomic Energy Regulatory Board, Mumbai, Maharashtra 400094, India.
Radiat Prot Dosimetry. 2024 Jul 17;200(11-12):1070-1075. doi: 10.1093/rpd/ncae033.
The natural radioactivity concentration was studied for 40 soil samples of the Churchandpur and Ukhrul districts of Manipur, India, by using gamma-ray spectroscopy. The average radioactivity concentration of 226Ra, 232Th and 40K in Churchandpur was found as 39.9 (range: 30-56), 72.1 (range: 57-93) and 564.1 (range:360-867) Bq kg-1 respectively, whereas, in Ukhrul, average radioactivity for the same was found as 30.3 (range: 16-54), 54.2 (range:24-89) and 637.1(range:103-901) Bq kg-1, respectively. The calculated radioactivity parameters were compared with the world average values. The measured radium equivalent activity (Raeq), absorbed dose rate ($\dot{\mathrm D}$), annual effective outdoor dose(Ė) and the external hazard index (Hex) were observed as 165 (range: 63.7-234.8) Bq kg-1, 77.6 (36.9-108.0) nGy h-1, 0.11 (0.05-0.13) mSv y-1 and 0.5 (0.1-0.6), respectively. This study aims to provide baseline data for radionuclide present in the Churchandpur and Ukhrul districts of Manipur.
对印度曼尼普尔邦乔尔查尔布尔和乌克鲁尔地区的 40 个土壤样本进行了伽马能谱分析，研究了其自然放射性浓度。乔尔查尔布尔地区 226Ra、232Th 和 40K 的平均放射性活度分别为 39.9（范围：30-56）、72.1（范围：57-93）和 564.1（范围：360-867）Bq/kg，而乌克鲁尔地区的平均放射性活度分别为 30.3（范围：16-54）、54.2（范围：24-89）和 637.1（范围：103-901）Bq/kg。将计算出的放射性参数与世界平均值进行了比较。测量得到的镭当量活度（Raeq）、吸收剂量率（$\dot{\mathrm D}$）、年有效室外剂量（Ė）和外照射指数（Hex）分别为 165（范围：63.7-234.8）Bq/kg、77.6（36.9-108.0）nGy/h、0.11（0.05-0.13）mSv/y 和 0.5（0.1-0.6）。本研究旨在为曼尼普尔邦乔尔查尔布尔和乌克鲁尔地区的放射性核素提供基线数据。
