^37Ar活度比对测量  

Comparison of ^(37)Ar activity measurement

作　　者：曹琳[1] 亢武[1] 向永春[1] 卞直上[1] 李伟[1] 郝樊华[1] Riedmann R A Purtschert R Loosli H H 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]Climate and Environmental Physics, University of Berne, Berne, Switzerland

出　　处：《核技术》2009年第1期14-18,共5页Nuclear Techniques

摘　　要：37Ar是地下核爆确定的、明确的指示剂,目前已经被CTBTO确定为现场视察的核查核素。中国工程物理研究院核物理与化学研究所研制了适合现场视察的37Ar探测系统--移动式37Ar快速探测系统(Movable37Ar Rapid Detection System,MARDS),该系统采用LLC方法(Low Level Decay Counting)测量37Ar的活度。目前国际上尚无37Ar活度测量的标准装置,因此开展37Ar活度比对测量是一项很有必要的工作。本文介绍了我所(中国工程物理研究院核物理与化学研究所,INPC)与瑞士伯尔尼大学大气与环境物理研究所(KUP)开展的37Ar活度比对测量工作。比对测量的结果说明MARDS测量37Ar活度的方法和结果有很高的可信度,为MARDS系统应用于现场视察提供了技术支持。As a definitive and unambiguous indicator of a nuclear underground explosion, the noble gas of ^37At is an important nuclide for on-site inspections under the CTBTO （Comprehensive Nuclear-Test-Ban Treaty Organization）. The Institute of Nuclear Physics and Chemistry has developed the movable ^37At rapid detection system （MARDS） for on-site inspections, in which low level decay counting method is employed for ^37Ar activity measurement. Because no stand is available for ^37Ar activity measurement, comparison of the ^37Ar activity measurement is necessary. In this paper, comparison measurement between INPC and Division of Climate and Environmental Physics, Physics Institute University of Berne （KUP） is reported. The results show that the method used in MARDS is of great reliability in ^37Ar activity measurement. This work can enhance the trust of CTBTO for MARDS and support the potential application of MARDS in on-site inspections.

关 键 词：37Ar 活度测量 比对测量 正比计数管 

分 类 号：O571.1[理学—粒子物理与原子核物理]