Department of Studies and Research in Physics, Smt. V G College for Women, Kalaburagi, District, Karnataka 585103, India.
Department of Physics, Gulbarga University, Kalaburagi, District, Karnataka 585106, India.
Radiat Prot Dosimetry. 2024 Jul 17;200(11-12):1059-1063. doi: 10.1093/rpd/ncae025.
Natural radioactivity measurement, radiation monitoring of the region, dose assessment and interpretation of radiological-related parameters are crucial aspects from the public awareness and environmental safety point of view. The ionising radiations (gamma-rays) emitted from radionuclides such as 226Ra, 232Th and 40K present in environmental materials contributes significantly to the external radiation dose received by the public. High-efficiency gamma spectrometry based on a 4″ × 4″ NaI (Tl) detector was employed for estimating activity concentrations of the gamma-emitting radioelements. The spectra from the detector were recorded using a PC-based 1k multichannel analyser system (WinTMCA 32). Each sample spectrum was acquired for a counting period of 60 000 s (16.67 hr). Assuming the daughter products of 226Ra and 232Th in equilibrium, the activity concentration of these radionuclides were estimated by using the prominent gamma photo peaks of daughter products. Using the same technique, dose-related radiological parameters were calculated for all the samples. The activity concentrations of the radionuclides and the dose-related parameters for the samples were found to be comparable with the global literature values. The data generated from our study will contribute to the baseline radiological data of the region.
从公众意识和环境安全的角度来看，天然放射性测量、区域辐射监测、剂量评估以及放射性相关参数的解释是至关重要的方面。环境物质中存在的放射性核素（如 226Ra、232Th 和 40K）会发出电离辐射（γ射线），这些辐射对公众所接受的外照射剂量有重要贡献。采用基于 4"×4" NaI(Tl)探测器的高效γ能谱法来估算γ放射性核素的活度浓度。使用基于 PC 的 1k 多道分析器系统（WinTMCA 32）记录探测器的光谱。每个样品光谱的采集时间为 60000s（16.67 小时）。假设 226Ra 和 232Th 的子体处于平衡状态，通过利用子体的主要γ射线峰来估算这些放射性核素的活度浓度。采用相同的技术，计算了所有样品的与剂量相关的放射性参数。发现样品中放射性核素的活度浓度和与剂量相关的参数与全球文献值相当。本研究产生的数据将为该地区的基础放射学数据做出贡献。
