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

Abstract The photoluminescence lifetime and spectrum of YBO 3 :Ce 3+ are observed before and after proton bombardment. 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 YBO 3 :Ce 3+ 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 YBO 3 :Ce 3+ is more sensitive to damage.