Accès ouvert déclaré
2025
preprint
Precise Measurement of $^{216}$Po Half-life with Exact Parent-daughter Pairing in PandaX-4T
PandaX Collaboration, Chenxiang Li, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Cheng Chen, Xiangyi Cui, Yingjie Fan, Deqing Fang, Xin Hua Fu, Zhixing Gao, Yanqi Ge, Lisheng Geng, Karl Ludwig Giboni, Xunan Guo, Xuyuan Guo, Zichao Guo, Chencheng Han, Ke Han, Changda He, Jinrong He, Houqi Huang, J. Huang, Yule Huang, Ruquan Hou, Xiangdong Ji, Yonglin Ju, Jiafu Li, Mingchuan Li, Peiyuan Li, Shuaijie Li, Tao Li, Yangdong Li, Zhiyuan Li, Qing Lin, Jianglai Liu, Yuanchun Liu, Congcong Lu, Xiaoying Lü, Lingyin Luo, Yunyang Luo, Y. G., Yajun Mao, Meng Yue, Binyu Pang, Ningchun Qi, Zhicheng Qian, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Manbin Shen, Wenliang Sun, Xuyan Sun, Tao Yi, Yueqiang Tian, Yuxin Tian, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Lei Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Shibo Wang, Siguang Wang, Wei Wang, Wang Xu, Yue-Huan Wei, Weihao Wu, Yuan Wu, Mengjiao Xiao, Xiang Xiao, Kaizhi Xiong, Jianqin Xu, Yunhua Xu, Shunyu Yao, Binbin Yan, Xiyu Yan, Yong Yang, Peihua Ye, Chunxu Yu, Ying Yuan, Zhe Jun Yuan, Youhui Yun, Xinning Zeng, Minzhen Zhang, Peng Zhang, Shibo Zhang, Siyuan Zhang, Shu Xin Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Li Zhao, Kangkang Zhao, Jifang Zhou, Jiaxu Zhou, Jiayi Zhou, Zhizhen Zhou, Chenhui Zhu
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Le résumé fourni par la source
We report a precise measurement of $^{216}\rm Po$ half-life using the PandaX-4T liquid xenon time projection chamber (TPC). $^{220}\rm Rn $, emanating from a $^{228}\rm Th $ calibration source, is injected to the detector and undergoes successive $α$ decays, first to $^{216}\rm Po$ and then to $^{212}\rm Pb$. PandaX-4T detector measures the 5-dimensional (5D) information of each decay, including time, energy, and 3-dimensional positions. Therefore, we can identify the $^{220}\rm Rn $ and $^{216}\rm Po$ decay events and pair them exactly to extract the lifetime of each $^{216}\rm Po$. With a large data set and high-precision $^{220}\rm $Rn-$^{216}\rm $Po pairing technique, we measure the $^{216}\rm Po$ half-life to be $143.7\pm0.5$ ms, which is the most precise result to date and agrees with previously published values. The leading precision of this measurement demonstrates the power of 5D calorimeter and the potential of exact parent-daughter pairing in the xenon TPC.
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Les sujets associés
Nuclear physics research studiesParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions