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 National Laboratory for Optoelectronics, Wuhan 430071, China
2. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
3. Central Iron and Steel Research Institute, Beijing 100081, China
4. School of Science, Anhui Agricultural University, Hefei 230036, China
5. Beijing City Key Lab for Medical Physics and Engineering, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, China