An effective method for identifying decay events in storage rings and its application in 94mRu44+ lifetime measurement

Subjects: Physics >> Nuclear Physics submitted time 2024-01-10

FU Chaoyi LI Hongfu SUN Mingze XING Yuanming YAN Xinliang ZHAO Jiankun ZHOU Xu PENG Tingwei ZENG Qi WANG Meng ZHANG Yuhu TU Xiaolin

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 observation time window of (20 μs, 180 μs). In order to identify more decay events, a method based on spectral amplitude was studied in this paper. Based on the simulation results, this 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 rest frame was calculated to be 194(121) μs. The new lifetime result is within the error range of the previous result 218(148) μs, with higher precision.

YES

 Hits 607  Downloads 85  Comment