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| THE APPLICATION OF GAMMA-RAY SPECTROMETRY TO ESTIMATING TERRAIN GAMMA-RAY DOSE IN AIR |
| WANG Nan-ping1, XIONG Shen-qing2, HUANG Ying1, WU Qi-fan2, XIAO Lei1, LIU Shao-ming1, PEI Shao-ying1, GAO Bao-long1, CHENG Ye-xun1 |
1. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China;Geo-Detection Laboratory, Ministry of Education, Beijing 100083, China;
2. China Aero Geophysical Survey & Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract Terrain gamma-ray absorption dose is an important parameter in estimating the ionization radiation environment level. Gamma-ray dose calculated by in-situ gamma-ray spectrometric data has been studied and used abroad since 1970s, and terrain dose mapping has been carried out in U.S.A, Sweden and Russia. In China, gamma-ray spectrometer survey was carried out in Zhuhai, Guangdong Province, from 2002 to 2003. The dose rate was calculated by Beck Expression using concentrations of 238U,232Th and 40K measured by in-situ spectrometer. The results coincide with the gamma-ray dose measured by dosemeter. The measured and calculated average dose rates are (144.86±27.21) nGy/h and (136.34±26.71) nGy/h, respectively, in Zhuhai City.
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Received: 30 August 2004
Published: 24 December 2004
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