Assessment of $\small{^{137}Cs}$ for Selection of Reference Site of In Situ Gamma Spectrometry in Some Areas of Jeju Island

Title & Authors
Assessment of $\small{^{137}Cs}$ for Selection of Reference Site of In Situ Gamma Spectrometry in Some Areas of Jeju Island
Kim, Chang Jong; Cho, Yoon Hae; Kang, Tae Woo; Ko, Seok Hyung; Yun, Ju Yong; Lee, Dong Myeong;

Abstract
Jeju Island is a significant area as a reference site of in situ gamma spectrometry because there are a number of open spaces which includes $\small{^{137}Cs}$ above a certain level. In this paper, the pasture within the Hallasan National Park was selected as one of the open spaces of Jeju Island. The homogeneity of $\small{^{137}Cs}$ at the site was assessed by analysis of variance on count and by radioactivity concentration obtained through in situ gamma spectrometry. For this purpose, the count of a total of 79 points at 3 sites were measured with less than count uncertainty of 5% for 2000 seconds. In the results of the analysis of variance, the 2 sites were homogeneous, and the remaining 1 site can be specified to be homogeneous through the adjustment of measuring range. The distribution of radioactivity concentration calculated by in situ gamma spectrometry were $\small{53.7{\sim}93.2Bq\;kg^{-1}}$, $\small{30.5{\sim}61.0Bq\;kg^{-1}}$ and $\small{48.8{\sim}102Bq\;kg^{-1}}$ at each site.
Keywords
In situ gamma spectrometry;Reference site;$\small{^{137}Cs}$;Jeju;
Language
Korean
Cited by
1.
Simultaneous Determination of the Depth of an Embedded Source and its Radioactivity in the Medium, Health Physics, 2016, 111, S183
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