摘要
本文探讨了一种基于嵌入式系统的软件延迟符合分辨测量氡同位素技术,建立基于ARM嵌入式微处理器试验装置,记录核脉冲序列的时序信息,利用氡同位素的短寿命子体钋半衰期不同的特性,用一种软件延迟符合测量法分辨测量了219 Rn和220 Rn源。实验结果表明,软件延迟符合系统能分辨测量低水平219 Rn和220 Rn,操作简便,达到了设计目的。
The software delayed coincidence counting technology was researched based on embedded system. The device based on ARM processor was constructed to record time serials information of nuclear pulse. According to the different half-lifes of Po short-life daughters of radon isotopes, a method of software delayed coincidence count- ing was used to discriminate radon isotopes. Experiment results of ^220Rn and ^219Rn standard source measurement show that the software del od is practical for discrimination measurement of low 1 The software method is an alternative to hardware one, ience and flexibility. ayed coincidence counting methevel activity of radon isotopes. and it can offer better conven-ience and flexibility.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2011年第12期1527-1531,共5页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(11175082)
湖南省科技厅资助项目(2008TP4009-2)
关键词
氡同位素测量
延迟符合测量
ARM
measurement of radon isotopes
delayed coincidence counting
ARM
