Gamma Radiation Measurements of Naturally Occurring Radioactive in Igneous Rocks and Its Radiological Complications

J. Al-Zahrani
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引用次数: 4

Abstract

The concentrations of natural radioactivity were measured in igneous rock samples collected from Albaha region in the south west of Saudi Arabia. A high purity germanium (HPGe) detector was used for analysis. The average activity concentrations for 226Ra, 232Th and 40K were 35, 31.52 and 843.63 Bq kg−1, respectively. The average absorbed dose rate was 70.86 nGy⋅h−1 with a corresponding average annual effective dose 0.09 mSv⋅y−1. The average radium equivalent activity value was 145.84 Bq⋅kg−1, lower than the international limit 370 Bq⋅kg−1. The external and internal indices average values were 0.39 and 0.49, respectively. The average results obtained in this study are lower than the average national and world recommended values, therefore, there is no health risk to the populace of the area. This study provides a baseline map of background radioactivity levels in the Saudi environment and will be used as reference information to assess any changes in the level background due to geological processes.
火成岩中天然放射性物质的伽马辐射测量及其放射并发症
对采集自沙特阿拉伯西南部Albaha地区的火成岩样品进行了天然放射性浓度测量。采用高纯锗(HPGe)检测器进行分析。226Ra、232Th和40K的平均活性浓度分别为35、31.52和843.63 Bq kg−1。平均吸收剂量率为70.86 nGy⋅h−1,相应的年平均有效剂量为0.09 mSv⋅y−1。平均镭当量活度值为145.84 Bq⋅kg−1,低于国际标准370 Bq⋅kg−1。外部指标平均值为0.39,内部指标平均值为0.49。本研究获得的平均结果低于国家和世界的平均推荐值,因此,对该地区的民众没有健康风险。这项研究提供了沙特阿拉伯环境中本底放射性水平的基线图,并将作为参考资料,用于评估由于地质作用而引起的本底放射性水平的任何变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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