期刊论文

Xiao, De-Tao

中文

原子能科学技术

1000-6931

2014

48

12

2375-2380

10.7538/yzk.2014.48.12.2375

国家自然科学基金资助项目（11375083,11475082）； 衡阳市科技计划项目资助（2013KJ30）；

本校为第一且通讯机构

本文基于α能谱法建立了无需频繁更换滤膜的~(220)Rn子体连续测量方法,并在南华大学氡实验室开展了与标准~(220)Rn子体参考水平定值方法的~(220)Rn子体水平测量的对比研究。结果表明:在高~(220)Rn子体水平测量环境中,ThB和ThC 8个测量周期的测量结果与参考方法的测量结果相差5.0%与7.0%左右。在低~(220)Rn子体水平测量环境中,ThB 4个测量周期的测量结果与参考方法的测量结果相差控制在4.5%以内,ThC的控制在10.0%左右。在~(220)Rn子体水平为100 Bq/m~3左右的测量环境中,ThB和 ThC的总不确定度均控制在5%左右;采样过程中沉积在滤膜上的气溶胶对滤膜自吸收的影响可忽略。该方法的建立将为~(222)Rn/...

A new method of continuous measurement of the concentration of 220Rn progeny without replacing membrane frequently was established based on αspectroscopy. A comparison study between the new method and the standard method for determination 220Rn progeny reference levels was carried out in the radon laboratory of the University of South China. The results show that under the high level measurement environment of 220Rn progeny, the relative difference of the two method is 5.0% for ThB and 7.0% for ThC during eight measurement periods. Under the low level measurement environment of 220Rn pro...