Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2010, Vol. 21 ›› Issue (3): 182-186 doi: 10.13538/j.1001-8042/nst.21.182-186


A practical soil radon (222Rn) measurement method

DING Weicheng 1,2,* WANG Yi 1 LI Yuanjing 1 FANG Fang2 YANG Liu 2   

  1. 1 Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China 2 Chengdu University of Technology, Key Laboratory of Applied Nuclear Technology in Geosciences, Chengdu 610069, China
DING Weicheng, WANG Yi, LI Yuanjing, FANG Fang, YANG Liu . A practical soil radon (222Rn) measurement method.Nuclear Science and Techniques, 2010, 21(3): 182-186     doi: 10.13538/j.1001-8042/nst.21.182-186


Soil radon measurement of high stability and sensitivity is widely applied, and in some applications, such as in uranium prospecting, 222Rn should be distinguished from 220Rn. To meet this requirement, a practical method based on soil radon diffusion and accumulation theory to measure soil radon by Alpha Particle Spectroscopy (α-PS) is discussed in this paper. The α-PS measurement method can effectively overcome the effects of 220Rn and its daughters (216Po, 212Bi, 212Po). The system can eliminate the impact of soil radon field disturbance and non-uniformity through soil radon static diffusion. Radon daughters (218Po, 214Po) are accumulated under the action of an electrostatic force, which not only enhances the measurement sensitivity, but also increases robustness of the measurement. Simultaneous measurement of multiple points can increase the comparability of measurement data and the measurement efficiency. Experimental data shows that the soil radon measurement method was robust. So it has wide applications such as in geological prospecting, in fissure groundwater exploration and in ground subsidence inspection.

Key words: Soil radon, α-PS, 222Rn, diffusion and accumulation theory, Soil radon concentration measurement