Study on lattice defects in CeO2 by means of positron annihilation measurements

Positron annihilation coincidence Doppler broadening (CDB) measurements were performed for CeO2 after the high temperature annealing or the electron irradiation. Both the annealing and the electron irradiation, the vacancy-type defects were detected by positron annihilation measurement. In contrast, CDB results showed the different type of vacancies was introduced by annealing and electron irradiation.