1. College of Chemistry Sichuan University Key Laboratory of Radiation Physics & Technology Ministry of Education Chengdu 610064 P. R. China
2. Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
3. Chengdu New Radiomedicine Technology CO. LTD. Chengdu 610064 P. R. China