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Measurement of Cs-137 in Ice Core Samples from Antarctica

Title
Measurement of Cs-137 in Ice Core Samples from Antarctica
Authors
Lim, S. I.Kim, D. H.Huh, J. Y.Lee, J.Hahn, I. S.Han, Y. C.Hur, S. D.Hwang, H. J.Kang, W. G.Kim, Y. D.Lee, E. K.Lee, M. H.
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2018
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
0374-4884JCR Link

1976-8524JCR Link
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY vol. 73, no. 9, pp. 1263 - 1268
Keywords
Antarctica; Environmental radiation; Artificial radioisotopes; HPGe detector
Publisher
KOREAN PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS
Document Type
Article
Abstract
Three different ice core samples from Antarctica were analyzed to identify activity concentrations of radioactive isotopes. Tracking migration of radioactive isotopes to Antarctica can provide a key clue to understand global environmental changes caused by radiation exposures because the Antarctic ice cores can preserve unique characteristics of various environmental conditions. We are particularly interested in the Cs-137 nucleus, because it is closely related to radiation exposure from nuclear power plant accidents and nuclear bomb tests. With its half life of 30.17 +/- 0.03 years, Cs-137 can also be used to assess the age of sedimentation occurring after around the year 1945. We selected three ice core samples, called Tarn8, Styx27, and H25, from different time periods; the Tarn8 sample is known to be from earlier than similar to 1000 AD, the Styx27 sample is approximately from the year 1945, and the H25 sample is from the year 2012. Radioactive isotope measurements of the ice core samples were performed using a 100% HPGe detector at Cheongpyeong Underground Radiation Laboratory (CURL). We measured the activity of Cs-137 in the H25 sample to be 0.98 +/- 0.82 mBq/kg. Although the activity has a large uncertainty mainly due to the limited sample quantity, the Cs-137 isotopes in the Antarctic ice core were measured for the first time in Korea.
DOI
10.3938/jkps.73.1263
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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