1. College of Chemistry, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Sichuan University, Chengdu 610064, P. R. China
2. Chengdu New Radiomedicine Technology CO. LTD., Chengdu 610207, P. R. China
3. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, P. R. China