1. College of Environment and Ecology
2. Chengdu University of Technology
3. Chengdu 610059
4. P. R. China
5. College of Chemistry
6. Sichuan University
7. Key Laboratory of Radiation Physics & Technology
8. Ministry of Education
9. Chengdu
10. Institute of Nuclear Physics and Chemistry
11. China Academy of Engineering Physics
12. Mianyang 621900