屏栅电离室+ΔE-E望远镜探测器系统  

A Grid-ionization Chamber and a ΔE-E Particle Telescope Detection Set-up

作　　者：王涛峰[1] 朱丽萍[1] 孟庆华[1] 王黎明[1] 韩洪银[1] 夏海鸿[1] 黎光武[1] 屈从会[1] 顾先宝[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子核物理评论》2007年第3期204-207,共4页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10175091)~~

摘　　要：研制了屏栅电离室+ΔE-E望远镜探测器系统,系统的屏栅电离室用来测定252Cf自发裂变碎片的能量和相对于探测器系统轴线的发射角,与屏栅电离室耦合安装的ΔE-E望远镜探测器由一个薄的屏栅电离室(气体ΔE)和一个金硅面垒探测器(E)组成,用来确定互补碎片的电荷。用本系统对252Cf自发裂变碎片电荷分布进行了4个参数的关联测量,结果表明,这个探测器系统的电荷分辨能力Z/ΔZ好于40∶1。A detection set-up,composed of a typical grid-ionization chamber and a ΔE-E particle telescope,was constructed to study the charge distributions of fragments in spontaneous fission of 252Cf.The fission fragment energy and the emission angle corresponding to the symmetrical axis were measured by the grid-ionization chamber,the ΔE-E particle telescope in which a thin grid-ionization chamber was served as the ΔE-section and a surface barrier detector as the E-section was employed to determined the charge of the complementary fragment.Four parameter measurements of 252Cf spontaneous fission were performed by this set-up, the results show that the charge resolution of Z/ΔZ〉40∶1 can be obtained by this detector system.

关 键 词：屏栅电离室 ΔE-E望远镜 电荷分辨能力 

分 类 号：O571.43[理学—粒子物理与原子核物理]