A capacitance servo control plunger for accurate lifetime measurement  

作　　者：汪金龙 吴晓光 贺创业 李广生 樊启文 杜英辉 吴义恒 胡世鹏 郑云 李聪博 李红伟 刘嘉健 罗朋威 姚顺和 

机构地区：[1]China Institute of Atomic Energy

出　　处：《Chinese Physics C》2014年第3期45-50,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10675171,10927507,11075214,11175259)

摘　　要：The recoil distance Doppler shift method has been widely used in the study of nuclear structure to determine the level lifetime and absolute transition probabilities.A capacitance servo control plunger based on this method has been successfully developed by the Nuclear Structure Group of the China Institute of Atomic Energy.Three microscopes were employed to check the parallelism and can therefore guarantee a delicate measurement of the distance between the target and the stopper.This new plunger made a successful performance in the test experiment and the measured lifetime of the 2~＋→0~＋ transition in ^（78）Kr is in agreement with the previous value.The recoil distance Doppler shift method has been widely used in the study of nuclear structure to determine the level lifetime and absolute transition probabilities.A capacitance servo control plunger based on this method has been successfully developed by the Nuclear Structure Group of the China Institute of Atomic Energy.Three microscopes were employed to check the parallelism and can therefore guarantee a delicate measurement of the distance between the target and the stopper.This new plunger made a successful performance in the test experiment and the measured lifetime of the 2~＋→0~＋ transition in ^（78）Kr is in agreement with the previous value.

关 键 词：lifetime RDDS plunger capacitance method servo control 

分 类 号：O571.2[理学—粒子物理与原子核物理]