裂变碎片靶室在直接测量重A超核寿命中的应用(英文)

The Application of Fission Fragments Chamber in Direct Measurement of Heavy A Hypernucear Lifetime

介绍了一种新的直接测量重超核寿命的方法.并对其中用到的一个重要探测设备——裂变碎片靶室——在托马斯·杰斐逊国家实验室用^(252)Cf放射源进行了测试.该靶室的单模块时间分辨率为～163ns.在此分辨率的基础上,计算机模拟表明用此方法测到的超核寿命误差将在9.6ps左右.

In this paper a new method to measure the lifetime of heavy hypernuclei is introduced,and the main device used in the measurement-fission fragment chamber（FFC）-is tested by a 252Cf spontaneous source at Thomas Jefferson National Accelerator Facility（JLab）.The chamber has a single-module timing resolution of～163ps.Based on the timing resolution tested,our computer simulation predicts that the error of the measured lifetime is about 9.6ps.