利用光学拉姆齐技术测量$^6Li^+$的超精细结构和Zemach半径
摘要：用光学拉姆齐技术研究$2,^3!S\_1$-$2,^3!P\_J$($J = 0, 1, 2$)态的$^6Li^+$的跃迁，并获得了$2,^3!S\_1$和$2,^3!P\_J$态的最精确的超精细分裂值，其不确定性最小约为10 kHz。与先前实验相比，本文结果将$2,^3!S\_1$态的不确定性减小了5倍，$2,^3!P\_J$态的不确定性减小了50倍，并且与理论值更吻合。将我们测量的$2,^3!S\_1$态的超精细间隔与最新量子电动力学(QED)计算相结合，得到了$^6Li$核的改进Zemach半径为2.44(2) fm，其不确定性完全由未计算的$malpha^7$阶QED效应引起。该结果与简单的核电荷和磁化分布模型确定的值3.71(16) fm存在明显的不一致。我们要求对$^6Li$的Zemach半径进行更明确的核物理确定。
作者：Wei Sun (1,2), Pei-Pei Zhang (1), Peng-peng Zhou (1,2,5), Shao-long Chen (1,2), Zhi-qiang Zhou (1,2,5), Yao Huang (1,2), Xiao-Qiu Qi (6), Zong-Chao Yan (3,1), Ting-Yun Shi (1), G. W. F. Drake (4), Zhen-Xiang Zhong (1), Hua Guan (1,2), and Ke-lin Gao (1,2) ((1) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China, (2) Key Laboratory of Atomic Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China, (3) Department of Physics, University of New Brunswick, Fredericton, New Brunswick, Canada, (4) Department of Physics, University of Windsor, Windsor, Ontario, Canada, (5) University of Chinese Academy of Sciences, Beijing, China, (6) Key Laboratory of Optical Field Manipulation of Zhejiang Province and Physics Department of Zhejiang Sci-Tech University, Hangzhou, China)
论文ID：2303.07939
分类：Atomic Physics
分类简称：physics.atom-ph
提交时间：2023-03-21