1. School of Physics and Materials Science
2. Radiation Detection Materials & Devices Lab
3. Anhui University
4. Hefei 230039
5. P. R. China
6. Department of Physics and Electronic Engineering
7. Hefei Normal University
8. Hefei 230061
9. Department of Materials Science/CENIMAT-I3N
10. Faculty of Sciences and Technology
11. New University of Lisbon
12. CEMOP-UNINOVA
13. Portugal