1. TMSR Research
Center and CAS Key Lab of Nuclear Radiation
and Nuclear Energy Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
2. Quantum Beam Science Directorate, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
3. University of the Chinese Academy of Sciences, Beijing 100049, P. R. China