1. The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, People's Republic of China
2. Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, People's Republic of China
3. Beijing Radiation Center, Beijing 100875, People's Republic of China
4. China Institute of Atomic Energy, Beijing 102413, People's Republic of China