Journal
APPLIED RADIATION AND ISOTOPES
Volume 63, Issue 2, Pages 255-259Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2005.02.011
Keywords
natural radioactivity; HPGe detector; soil; radium equivalent activity; absorbed dose rate; external hazard index
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The natural radioactivity of soils at the Xiazhuang granite massif of Southern China has been studied. The radioactivities of 55 samples have been measured with a low-background HPGe detector. The radioactivity concentrations of U-238 and 4 K ranged from 40.2 to 442 and from 442 to 913 Bq/kg, respectively, while the radioactivity concentration of Th-232 varied only slightly. In order to evaluate the radiological hazard of the natural radioactivity, the radium equivalent activity (Ra-eq), the absorbed dose rate (D), the annual effective dose rate and the external hazard index (H-ex) have been calculated and compared with the internationally approved values. The study provides background radioactivity concentrations in a granite area, specifically, the area in the vicinity of a uranium mine in Southern China. The data can be used in exploring granite-type uranium deposits. (c) 2005 Elsevier Ltd. All rights reserved.
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