【作者】 陈鸿飞； 言杰； 郑普； 孙君杰； 肖军； 朱通华；

【Author】 CHEN Hong-fei;YAN Jie;ZHENG Pu;SUN Jun-jie;XIAO Jun;ZHU Tong-hua;Institute of Nuclear Physics and Chemistry;

【机构】 中国工程物理研究院核物理与化学研究所；

【摘要】 本文研制了一款用于研究中子诱发裂变碎片动能的双屏栅电离室,利用Garfield++对电离室的权重电场进行了建模分析,并对其屏蔽失效因子进行了研究。结果表明,栅丝横向变形为非对称影响,±1mm的形变可使屏蔽失效因子减少6.4%和增加0.2%;纵向变形为对称影响,±1mm的变形使屏蔽失效因子增加16.8%。利用混合镅源(含有²⁴¹Am和²⁴³Am)来检验屏栅电离室的基本性能,其能量分辨率为～2%@5.486Me V。更多还原

【Abstract】 The present work designs a Twin Frisch-Grid Ionization（TFGI） used for the study of the total kinetic energy release of neutron induced fission fragments. The weighting electric field and grid inefficiency have been simulated by Garfield++. The results show that the deformation of grids along different directions have different effects on the grid inefficiency. A compound α source(²⁴¹Am and ²⁴³Am) is measured to test the basic performance of the chamber,and the energy resolution is about 2%@5.486 MeV.更多还原