基于屏栅电离室的双参数谱仪研制及其应用  

Study and Application of Dual Parameter Spectrometer Based on a Gridded Ionization Chamber

作　　者：倪建忠[1] 代义华[1] 李谋[1] 贾怀茂[1] 何晓兵[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《原子能科学技术》2003年第1期82-85,共4页Atomic Energy Science and Technology

摘　　要：以屏栅电离室为基础,同时引出其阳级和阴极信号,研制了1台能够同时记录两路信号的双参数谱仪,在DEC 3000工作站上编制程序,实现了双维谱数据的获取、显示和存储。利用所建立的谱仪,测量了α放射源的双维谱,计算了α粒子的角分布,并讨论了如何利用角分布来校正活度测量中自吸收和反散射的影响以及改善电离室阳极能谱的能量分辨率。A dual parameter spectrometer is developed with which the anode and cathode signals of the gridded ionization chamber are recorded simultaneously, a computer program is designed to collect, display and store the two dimensional spectra. Alpha sources are measured with the spectrometer and the angle distribution of alpha particles are calculated. It is discussed how to correct the effects of back scattering and self absorption in the measurement of activity with the angle distribution and it is pointed out that the resolution of the energy spectra can be improved by using the angle distribution as well.

关 键 词：屏栅电离室 双参参谱仪 Α粒子 角分布 α能谱 

分 类 号：TL811.1[核科学技术—核技术及应用]