South coast of India is known as the high-level background radiation area (HBRA) mainly due to beach sands that contain natural radionuclides as components of the mineral monazite. The rich deposit of monazite is unevenly distributed along the coastal belt of Tamil Nadu and Kerala. An HBRA site that laid in 2×7 m along the sea was found in the beach of Chinnavillai, Tamil Nadu, where the maximum ambient dose equivalent reached as high as 162.7 mSv y(-1). From the sands collected at the HBRA spot, the high-purity germanium semi-conductor detector identified six nuclides of thorium series, four nuclides of uranium series and two nuclides belonging to actinium series. The highest radioactivity observed was 43.7 Bq g(-1) of Th-228. The individual dose of five inhabitants in Chinnavillai, as measured by the radiophotoluminescence glass dosimetry system, demonstrated the average dose of 7.17 mSv y(-1) ranging from 2.79 to 14.17 mSv y(-1).
雑誌名
Radiation Protection Dosimetry
巻
146
号
1-3
ページ
314 - 317
発行年
2011-07
出版者
Oxford University Press
ISSN
01448420
EISSN
17423406
書誌レコードID
AA10627673@@@AA12105817
PubMed番号
21502300
DOI
10.1093/rpd/ncr179
権利
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Radiation Protection Dosimetry following peer review. The definitive publisher-authenticated version Radiation Protection Dosimetry, 146(1-3), pp.314-317; 2011 is available online at: http://dx.doi.org/10.1093/rpd/ncr179.
Background radiation and individual dosimetry in the costal area of Tamil Nadu, India.
RPD146_314.pdf
(682.12KB)
NAOSITEについて