1. Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
2. College of Materials Science and Engineering, Hunan University, Changsha 410082, China
3. Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), ShanDong University, QingDao 266237, China
4. Institute of Modern Physics, Chinese Academy of Sciences, LanZhou 730000, China
5. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA