时间间隔分析法低活度^(220)Rn测量装置设计  

Measuring Equipment Design of Low Activity ^(220)Rn Based on Time Interval Analysis

作　　者：颜拥军[1] 朱皓[1] 曹真伟[1] 付德顺 

机构地区：[1]南华大学核科学技术学院,衡阳421001

出　　处：《核电子学与探测技术》2015年第9期849-852,共4页Nuclear Electronics & Detection Technology

基　　金：湖南省高校产业化培育项目(13CY014);湖南省自然科学基金院校联合基金(13JJ6053)资助

摘　　要：介绍了时间间隔分析法测量低水平活度^(220)Rn的装置的设计,该装置基于STM32,由FD-125闪烁室探测器、主放大器电路、信号整形电路及系统软件结构组成。仪器设计根据^(220)Rn级联衰变特性,采用时间间隔分析法对采集到的核脉冲时间序列进行时间间隔分析。开展了对标准^(220)Rn源单独及混合场的测量实验研究,其结果相对偏差分别在5%、9%以内。This paper introduces a measurement devise of low activity 220Rn which uses time interval analysis. The device bases on STM32 and consists of a FD - 125 scintillation chamber detector, a main amplifier circuit, a signal shaping circuit and a software system. This device uses cascade decay characteristics of 220Rn and time interval analysis method to analyze the nuclear pulse time series which is collected through FD - 125 scintilla- tion chamber detector. Through performing measurement experimental study of single 220Rn standard source and mixed radiation field, the results show the relative deviations are within 5% and 9% respectively.

关 键 词：STM32 FD-125 时间间隔分析法 低活度220Rn 

分 类 号：TL812[核科学技术—核技术及应用]