南印度主要河流沉积物的天然放射性和危险指数

Q4 Medicine

International Journal of Low Radiation Pub Date : 2015-09-19 DOI:10.1504/ijlr.2015.071761

S. Murugesan, S. Mullainathan, V. Ramasamy

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引用次数: 2

摘要

用γ射线能谱法测定了印度泰米尔纳德邦帕拉尔河沉积物中238U、232Th和40K的活度浓度。根据标准公式计算吸收剂量率、镭当量浓度、外(Hex)和内(Hin)危害指数，并与国际推荐限值进行比较。还计算了放射性产热率(RHP)和超额终身癌症风险(ELCR)。通过环境辐射剂量计(ERDM)在离地1米处测量了河流各站点的观测剂量率，并与计算的吸收剂量率进行了对比。石英、长石的分布、磁化率和磁性矿物的重量与放射性结果相关。从观测结果来看，磁性矿物的重量是识别低或高辐射风险沉积物的指标。

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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Natural radioactivity and hazardous index of major South Indian river sediments

The activity concentrations of 238U, 232Th and 40K have been determined by gamma ray spectrometry with an NaI(Tl) detector in sediments of Palar River, Tamil Nadu, India. The absorbed dose rate, radium equivalent concentration, external (Hex) and internal (Hin) hazardous indices are calculated from criteria formula and compared with the international recommended limits. The Radioactive Heat Production (RHP) rate and Excess Lifetime Cancer Risk (ELCR) are also calculated. The observed dose rate from ERDM (Environmental Radiation Dosimeter) at 1 m above the ground level at each site of the river is measured and correlated with calculated absorbed dose rate. The distribution of quartz, feldspar, magnetic susceptibility and weight of the magnetic minerals is correlated with radioactivity results. From the observations, the weight of the magnetic minerals is an index to identify the sediments of low or high radiological risk.

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来源期刊

International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis

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期刊介绍： The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.