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-¥â and ¥ã-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 ¥ã-ray concentration and gross-¥â 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-¥â activity concentration was measured by using the Tennelec XLB measuring instrument filled with P10 gas (argon 90%, methane 10%). The ¥ã-ray was measured through the ¥ã-ray spectroscopic analytical method by using the high purity germanium (HPGe) radiation detector. The range of gross-¥â 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 ¥ã-ray spectroscopic analysis of the teeth, the natural radioactive isotopes of 40K, 208Tl, 228Ac and 234Th were detected and their measured ¥ã-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-¥â, ¥ã-ray activity, Human tooth
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