一台塑料闪烁体β望远镜的能量刻度  

Energy calibration of a plastic scintillator beta telescope

作　　者：徐树威[1] 刘满清[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核技术》1990年第8期481-487,共7页Nuclear Techniques

摘　　要：一套△E-E塑料闪烁体β望远镜系统,用一组β^+、β^-及单能电子源^(297)Bi进行了线性能量刻度。对β谱用两种不同的方法进行了处理;对原始数据经过有限能量分辨修正后进行费米-库里标绘和对原始数据开方后直接进行线性拟会。结果表明:后一种方法可以很快地对端点能量绘出粗略的估计,前一种可以用来较好地确定端点能量,所给出的能量刻度的不确定性大约为35keV,而且,对塑料闪烁体探测器,β^+与β^-的响应函数没有很大差别。A △E-E plastic scintillator β telescope had been built, and calibrated by using a group of β- and β+ emitters and a 207Bi source. Their end-point energies were determined via two different methods, i. e. weighted linear least-square fit to the Fermi-Kurie plotes of the data after correcting for the finite energy resolution of the E scintillator and direct linear least-square fit to the square root of the raw data. It is shown that the latter can estimate the end-point energy rapidly, while the former can be used to determine the end-point energy with uncertainty about 35 keV for energy ranging 0.7 to 6.1 Me. .

关 键 词：塑料 闪烁体 β测量 能量刻度 

分 类 号：TL812[核科学技术—核技术及应用]