储存环中有效鉴别衰变事件的方法及在94mRu44+寿命测量中的应用
An Effective Method for Identifying Decay Events in Storage Rings and Its Application in 94mRu44+Lifetime Measurement
彭婷微 1曾奇 2王猛 3张玉虎 3涂小林 3付超义 3李宏福 3孙铭泽 3邢元明 3颜鑫亮 3赵剑锟 2周旭3
作者信息
- 1. 东华理工大学核科学与工程学院,南昌 330013
- 2. 东华理工大学核科学与工程学院,南昌 330013;江西省核辐射探测及应用工程技术研究中心,南昌 330013
- 3. 中国科学院近代物理研究所,兰州 730000
- 折叠
摘要
兰州重离子加速器冷却储存环上的等时性质量谱仪是开展高电荷态、短寿命同核异能态衰变研究的理想装置.在短寿命高电荷态离子94mRu44+的寿命测量实验中,我们直接观测到了 94Ru的8+态isomer衰变到基态的过程.在观测时间窗口(20 μs,180 μs)范围内,鉴别出了49个衰变事件.为了能够鉴别出更多的衰变事件,研究了一种基于频谱幅度来指认衰变事件的方法.基于模拟结果,该方法可以有效鉴别(15 μs,185 μs)内的衰变事件.将新的鉴别方法应用到实验数据处理中,在(15 μs,185 μs)内,鉴别出了 54个衰变事件.基于这54个衰变事件,计算得到94mRu44+在实验室坐标系下的寿命为194(121)μs.新的寿命结果与之前的结果218(148)μs在误差范围内一致.
Abstract
The Lanzhou Heavy Ion Accelerator Cooling Storage Ring(HIRFL-CSR)is an ideal device for studying the decay of highly charged and short-lived isomers.In the lifetime measurement experiment of the short-lived highly charged ion 94mRu44+,we directly observed the decay of 94Ru from 8+isomer to the ground state,and identified 49 decay events in the ob-servation time window of(20 μs,180 μs).In order to identify more decay events,a new method based on amplitude of fre-quency spectrum was studied in this paper.Based on the simulation results,this new method can effectively identify decay events within(15 μs,185 μs).By applying the new identification method to the experimental data processing,54 decay events were identified within(15 μs,185 μs).Based on these 54 decay events,the lifetime of 94mRu44+in the laboratory frame was calculated to be 194(121)μs.The new lifetime result is within the error range of the previous result 218(148)μs.
关键词
兰州重离子加速器冷却储存环/等时性质量谱仪/全剥离离子/94mRu/寿命测量Key words
HIRFL-CSR/isochronous mass spectrometry/fully stripped ions/94mRu/lifetime measurements引用本文复制引用
基金项目
国家自然科学基金资助项目(11805032)
国家自然科学基金资助项目(12305151)
出版年
2024
NETL
NSTL
万方数据