Determination of natural and artificial radioactivity levels and radiation hazard indices for soil samples in Kırşehir

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochimica Acta Pub Date : 2023-12-04 DOI:10.1515/ract-2023-0215

Sümeyra Yamçıçıer, Doğan Yaşar

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Abstract

The aim of this study is to create a radiological map of Kırşehir province in Turkey by analyzing the radioactivity levels of soil samples and environmental radiation measurements. 226Ra, 232Th, 40K and 137Cs radionuclides were analysed in soil samples collected from 47 locations using gamma spectrometry with an HPGe detector. According to the results obtained, gamma radioactivity concentration ranges and mean values for 226Ra, 232Th, 40K and 137Cs were determined as 133 ± 15–1515 ± 128 Bq/kg (599.40 Bq/kg), 0.3 ± 0.09–21.1 ± 1.7 Bq/kg (4.61 Bq/kg), 8.7 ± 0.9–128.5 ± 8.5 Bq/kg (29.66 Bq/kg) and 11.6 ± 8.6–273.8 ± 19.9 Bq/kg (48.80 Bq/kg) respectively. Average radioactivity levels for 40K and 232Th are above the world average. The mean radium equivalent activity (Raeq), gamma dose rate (D), annual effective dose equivalent (AEDE), external hazard index (H ex ), and the excess lifetime cancer risk (ELCR) were calculated as 145.45 Bq/kg, 122.13 nGy/h, 0.15 mSv/h, 0.39 and 0.29 × 10−3 respectively.

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Kırşehir土壤样品自然和人工放射性水平及辐射危害指数的测定

本研究的目的是通过分析土壤样本的放射性水平和环境辐射测量，绘制土耳其Kırşehir省的放射性地图。利用伽马能谱法和HPGe探测器分析了从47个地点收集的土壤样品中的226Ra、232Th、40K和137Cs放射性核素。根据所得结果，确定了226Ra、232Th、40K和137Cs的γ放射性浓度范围和平均值分别为133±15 ~ 1515±128 Bq/kg (599.40 Bq/kg)、0.3±0.09 ~ 21.1±1.7 Bq/kg (4.61 Bq/kg)、8.7±0.9 ~ 128.5±8.5 Bq/kg (29.66 Bq/kg)和11.6±8.6 ~ 273.8±19.9 Bq/kg (48.80 Bq/kg)。40K和232Th的平均放射性水平高于世界平均水平。平均镭当量活度(Raeq)、γ剂量率(D)、年有效剂量当量(AEDE)、外部危害指数(hex)和过量终身癌症风险(ELCR)分别为145.45 Bq/kg、122.13 nGy/ H、0.15 mSv/ H、0.39和0.29 × 10−3。

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