基于波形数字化的γ-γ符合测量  

Digital Coincidence Counting for γ-γ Coincidence Counting Based on Pulse Digitizing

作　　者：王忠海[1] 覃雪[1] 周智[1] 周荣[1] 韩纪锋[1] 杨朝文[1] 

机构地区：[1]四川大学物理科学与技术学院辐射物理与技术教育部重点实验室,成都610064

出　　处：《核电子学与探测技术》2012年第11期1293-1296,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助课题(10975104)

摘　　要：数字化符合测量是在传统符合测量基础上发展起来的一种辐射计量新技术。文章讨论了数字化符合测量系统和传统符合测量系统的差别,介绍了基于探测器信号波形数字化的符合测量原理。提出用实验室中常用的数字示波器来代替专用的模数转换电路,设计了示波器数据获取与处理程序,通过对示波器获得的波形序列进行数字处理,实现了数字化符合测量。用22Naβ+放射源通过传统符合测量系统进行检验,获得很好的结果。Digital Coincidence Counting is a new technique in radiation metrology. In the paper, the difference between digital coincidence counting and traditional coincidence counting has been discussed. The concept of digital coincidence counting which based on the pulse digitalizing also has been introduced. Digital Oscilloscope which is commonly used in laboratory has been employed to replace dedicated analogdigital conversion module. Data acquisition and processing software has been designed. Digital coincidence counting has been completed by processing the data from oscilloscope. Traditional coincidence counting was used to check digital coincidence counting. Activity results obtained from both methods correspond well for 22 Na.

关 键 词：数字化波形 γ—γ符合 22Na 放射性活度 

分 类 号：O571.323[理学—粒子物理与原子核物理]