Bragg探测器在AMS测量中的应用  

Applications of Bragg Detector for AMS

作　　者：李朝历[1] 王伟[1] 王祥高[1] 何明[1] 武绍勇[1] 董克君[1] 姜山[1] 管永精[2] 阮向东[2] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413 [2]广西大学物理科学与技术学院,广西南宁530004

出　　处：《原子能科学技术》2011年第6期730-735,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10875176)

摘　　要：为提高Bragg探测器的总能量和Bragg峰的分辨等性能,对1台Bragg探测器进行改进,并利用其测量36Cl、41Ca、79Se系列标准样品,有效排除了相应同量异位素的干扰,为进一步提高AMS测量这些中重核的灵敏度提供有效试验手段。A Bragg detector was modified systemically for higher sensitivity of accelerator mass spectroscopy（AMS） measurements for medium mass nuclides.The performance of the modified Bragg detector was improved.A series of 36Cl,41Ca and 79Se standard samples were measured.The results show that this Bragg detector can be successfully used for identification of 36Cl-36S and 41Ca-41K.This Bragg detector has a higher charge identification capability than ΔE-E detectors.The nuclear charge identification power was tested and the results show that the Bragg detector can directly determine the value of nuclear charge number within uncertainty of 1.2%.

关 键 词：Bragg探测器 加速器质谱计 同量异位素 粒子鉴别 

分 类 号：TL811.1[核科学技术—核技术及应用] TL817.4