1. School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou 344000, Jiangxi, People's Republic of China
2. School of Physics, Peking University, Beijing 100871, People's Republic of China
3. CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, People's Republic of China
4. School of Electric and Information Engineering, Zhongyuan University of Technology, Zhengzhou 450007, Henan, People's Republic of China
5. Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai 201800, People's Republic of China