Luminescence of ultrafine magnesium oxide ceramics with deep traps

5th International Congress on Energy Fluxes and Radiation Effects 2016

Nikiforov, S.V.^1 ; Kortov, V.S.^1 ; Kiryakov, A.N.^1 ; Petrovykh, K.A.^1

Ural Federal University, Ekaterinburg, Russia^1

关键词: Deep traps;    F-type centers;    Grain size;    High dose;    Pulse electron beams;    Reducing conditions;    Trapping centers;    Ultrafine;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012135/pdf
DOI  :  10.1088/1742-6596/830/1/012135

来源: IOP

【 摘 要 】

Thermoluminescence (TL) of ultrafine anion-defective magnesium oxide ceramics with a grain size of about 150 nm, which were thermally treated in highly reducing conditions at T=1100-1400 °C, has been studied after high-dose irradiation with a pulse electron beam (130 keV). Thermal treatment was found to cause TL intensity grow, which is associated with an increasing concentration of F-type centers. It was shown that varying occupancy of deep trapping centers changes a yield of the TL peak at 380 K. A hypothesis was made that the traps which are responsible for the TL peak at 380 K mainly have a hole nature in the samples under study.