THE METHOD FOR RECALIBRATION OF THORON CONCENTRATION READING OF RAD7 AND OBTAINING THE THORON EXHALATION RATE FROM SOIL SURFACE

被引：4
|
作者：
Tan, Yanliang [1 ,2 ]
Xiao, Detao [2 ]
机构：
[1] Hengyang Normal Univ, Dept Phys & Elect, Hengyang, Peoples R China
[2] Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China
来源：
NUCLEAR TECHNOLOGY & RADIATION PROTECTION | 2013年 / 28卷 / 01期
基金：
中国国家自然科学基金;
关键词：
thoron exhalation rate; soil; RAD7; DISCRIMINATIVE MEASUREMENTS; CALIBRATION; NIRS;
D O I：
10.2298/NTRP1301092T
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Thoron exhalation rate can be obtained through the combination of the "accumulation chamber" technique and RAD7. Thoron's rapid decay causes the intake path and the air flow rate to become important factors in calibration. In field conditions, since the flow rate of the internal pump in RAD7 will change as the voltage of the battery decreases, the big drying tube is more suitable for a long measurement than the small drying tube. We developed the method for recalibration of the thoron concentration reading of RAD7 based on the calibration factor for Rn-222, and obtained the thoron exhalation rate from soil surface near by the Radon Laboratory of the University of South China. This method can be applied to develop and improve instruments for measuring the radon exhalation rate.
引用
收藏
页码：92 / 96
页数：5
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