氡子体α能谱真空测量RaB反冲损失的消除方法  

The Elimination of RaB's Recoil Loss for Radon Daughters by α Spectrometric Measurement under Vacuity

作　　者：刘凯[1] 肖德涛[1] 周青芝[1] 单健[1] 丘寿康[1] 许艳婷[1] 傅燕[1] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2013年第2期1-3,共3页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(11005060)

摘　　要：南华大学氡实验室使用α谱仪工作站在真空环境下对氡子体进行测量时,由RaA衰变产生的RaB原子会有36%～37%的份额发生反冲损失,如果不采取措施,会对测量精度产生影响并造成测量腔室的污染.本文使用1.5μm厚的Mylar膜对测量样品覆盖的方法有效消除了RaB的反冲损失,且未对测量系统性能造成较大的影响.While the alpha spectrometer workstation in the Radon Laboratory of Universityof South China is used to measure radon daughters under vacuity, about 36% - 37% of RaB, the decay daughter of RaA, has lost because of recoil. Without taking measures, the recoil will impact on the measuring accuracy of radon daughters and cause contamination of the measuring chamber. The experiment has effectively eliminated the RaB＇ s loss by using the Mylar membrane with a thickness of 1.5 impact on the measurement system. μm to cover the samples , And has no major

关 键 词：氡子体 RAB 反冲损失 Mylar膜 

分 类 号：TL817.2[核科学技术—核技术及应用]