Evaluating displacement damage in cerium-doped yttrium borate using photoluminescence lifetime

The photoluminescence lifetime and spectrum of YBO3:Ce3+ are observed before and after proton bom-bardment. The optical properties change under irradiation, and thus the material can record information about the radiation exposure. As the fluence of 1 MeV protons increases beyond 10(14) proton/cm(2), the lifetime of YBO3:Ce3+ decreases nearly exponentially. Furthermore, by changing the concentration of cerium, the sensitivity of the material to the radiation induced defects is controllable such that lower-doped YBO3:Ce3+ is more sensitive to damage. (C) 2015 Elsevier B.V. All rights reserved.