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Determination of Gross-${\beta}$ and ${\gamma}$-Ray Activity Concentrations of Human Tooth  

Jeong, Hyunja (Department of Dental Hygene, Daegu Health College)
Kang, Hyun-Kyung (Department of Dental Hygene, Silla University)
Kim, Sunghwan (Department of Radiological Science, Cheongju University)
Publication Information
Journal of radiological science and technology / v.37, no.4, 2014 , pp. 261-265 More about this Journal
Abstract
The ${\gamma}$-ray concentration and gross-${\beta}$ 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-${\beta}$ activity concentration was measured by using the Tennelec XLB measuring instrument filled with P10 gas (argon 90%, methane 10%). The ${\gamma}$-ray was measured through the ${\gamma}$-ray spectroscopic analytical method by using the high purity germanium (HPGe) radiation detector. The range of gross-${\beta}$ 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 ${\gamma}$-ray spectroscopic analysis of the teeth, the natural radioactive isotopes of $^{40}K$, $^{208}Tl$, $^{228}Ac$ and $^{234}Th$ were detected and their measured ${\gamma}$-ray activity concentrations were found to be 20.7, 21.9, 3.88 and 5.24 Bq/kg, respectively.
Keywords
Gross-${\beta}$; ${\gamma}$-ray activity; Human tooth;
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