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KMID : 0357520140370040261
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Journal of Radiological Science and Technology
2014 Volume.37 No. 4 p.261 ~ p.265
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Determination of Gross-β and γ-Ray Activity Concentrations of Human Tooth
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Jeong Hyun-Ja
Kang Hyun-Kyung
Kim Sung-Hwan
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Abstract
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The γ-ray concentration and gross-β activity by age group were measured in the teeth of males and females of the domestic residents. They were divided into 7 age groups from 10s to the age of 70s. The gross-β activity concentration was measured by using the Tennelec XLB measuring instrument filled with P10 gas (argon 90%, methane 10%). The γ-ray was measured through the γ-ray spectroscopic analytical method by using the high purity germanium (HPGe) radiation detector. The range of gross-β activity concentration was measured 0.089 to 0.32 Bq/kg in females and 0.13 to 0.26 Bq/kg in males. From the γ-ray spectroscopic analysis of the teeth, the natural radioactive isotopes of 40K, 208Tl, 228Ac and 234Th were detected and their measured γ-ray activity concentrations were found to be 20.7, 21.9, 3.88 and 5.24 Bq/kg, respectively.
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KEYWORD
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Gross-β, γ-ray activity, Human tooth
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