@misc{oai:repo.qst.go.jp:00064629,
 author = {Sarata, Kumar Sahoo and Hosoda, Masahiro and Takahashi, Hiroyuki and Sorimachi, Atsuyuki and Ishikawa, Tetsuo and Tokonami, Shinji and Uchida, Shigeo and サフー サラタ クマール and 細田 正洋 and 反町 篤行 and 石川 徹夫 and 床次 眞司 and 内田 滋夫},
 month = {Jun},
 note = {From the viewpoint of radiation protection, determination of natural radionuclides such as U and Th in soil samples are important. In recent years, attention has been drawn to the development and steady introduction of analytical methods suitable for quantification of Th and U tracers. The geochemical behavior of thorium, uranium and rare earth elements (REEs) are relatively close to one another while compared to other elements in geological environment. Radioactive elements like 232Th and 238U along with their daughter products (e.g. 226Ra) are present in most of the environmental matrices and can be transferred to living bodies by different pathways that can lead to the sources of exposure of man. Therefore, it is necessary to monitor those natural radionuclides in weathered soil samples to assess the possible hazards. The activity concentrations of 226Ra, 232Th, and 40K in soils have been measured using a -ray spectroscopy system with high purity germanium detector. The uranium, thorium and REEs were determined from the same sample using inductively coupled plasma mass spectrometry (ICP-MS). For example, granitic rocks contain higher amounts of U, Th and light REEs compared to other igneous rocks such as basalt and andesites. Therefore, it is necessary to understand the interaction between REEs and nature of soils since soils are complex heterogeneous mixture of organic and inorganic solids, water and gases. In this paper, we will discuss about distribution pattern of 226Ra, 232Th and 238U along with REEs in soil samples of weathered acid rock (granite and ryolite) collected from a few prefectures of Japan: (1) Hokkaido (2) Aomori (3) Miyagi (4) Gunma (5) Gifu (6) Hyogo (7) Hiroshima (8) Ehime (9) Kochi (10) Fukuoka (11) Kagoshima and (12) Okinawa., Third International Geo-Hazards Research Symposium},
 title = {Naturally occurring radionuclides and rare earth elements pattern in weathered Japanese soil samples},
 year = {2012}
}