量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Naturally occurring radionuclides of terrestrial origin are present in the earth’s crust. In most places on the earth, the natural radioactivity varies only within narrow limits, but in some places there are wide deviations from normal levels because of abnormally high levels of radioactive minerals. The presence of thorium and uranium and their decay products in minerals such as monazites, ilmenite, rutile, silimanite and zircon result in enhanced natural background radiation fields in the deposit areas are widely known as high background radiation area (HBRA). Monazite is one of the principal sources of rare earth elements (REEs) and present in the continental crust. Thus it is necessary to facilitate data on HBRAs to predict radiation patterns in the environment to
increase awareness. Radiological investigations have been carried out in the eastern coastal area of Odisha state, India to measure the extra terrestrial gamma dose rate, natural radionuclide (226Ra, 228Ac and 40K) concentration in selected surface soil samples. Based on thoron and its progeny measurements in the houses, air particulates were collected using cascade impactor. REEs, U and Th were measured from air particulates using an inductively coupled plasma mass spectrometry (ICP-MS) for a better understanding to trace the origin of sources.
会議概要（会議名, 開催地, 会期, 主催者等）
9th International Conference on High Level Environmental Radiation Areas-For Understanding Chronic Low-Dose-Rate Radiation Exposure Health Effects and Social Impacts (ICHLERA 2018)
NATURALLY OCCURRING RADIONUCLIDES AND SELECTED RARE EARTH ELEMENTS IN AIR PARTICULATES OF AN INDIAN HIGH RADIATION BACKGROUND AREA
