1. School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, P. R. China
2. Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
4. Spallation Neutron Source Science Center, Dongguan 523803, China
5. Department of Physics, Zhejiang Province Key Laboratory of Quantum Technology and Devices, Interdisciplinary Center for Quantum Information, and State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China
6. Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, P. R. China
7. School of Science, Westlake University, Hangzhou 310064, China
8. School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, P. R. China