低本底符合正电子湮没辐射多普勒展宽装置的研制  

Developing a system for measuring coincidence Doppler broadening spectrum of positron annihilation radiation with very low background

作　　者：邓文[1] 黄宇阳[1] 熊超[1] 孙顺平[1] 温新竹[1] 

机构地区：[1]广西大学物理科学与工程技术学院

出　　处：《实验技术与管理》2008年第12期61-64,共4页Experimental Technology and Management

基　　金：国家自然科学基金(10564001);广西科学研究与技术开发计划(桂科攻0480004);广西精品课程建设基金资助项目(A0521709)

摘　　要：根据正电子湮没的特点，研制了双高纯锗探头-多参数分析器符合正电子湮没辐射多普勒展宽装置，通过采用符合技术，大幅度地降低了正电子湮没辐射多普勒展宽谱的本底，谱线的峰高与本底之比高于10^5。该装置可用于研究原子的电子动量分布。By means of the characteristics of positron annihilation, a system with 2 high purity Ge detectors and multiparameter analyzer for measuring coincidence Doppler broadening spectrum of positron annihilation radiation has been built in this work. With this coincidence system, the background of Doppler broadening spectrum of positron annihilation radiation is reduced remarkably, and a ratio of peak to background higher than 105 can be obtained. The system can be used to investigate the momentum distribution of electrons in atoms.

关 键 词：多普勒展宽谱 正电子湮没辐射 符合技术 本底 

分 类 号：TL81[核科学技术—核技术及应用]