Optical properties

On the role of hole trapping centers in the interactive mechanism of the trap interaction in anion-defect alumina single crystals

S. V. Nikiforov, V. S. Kortov, A. A. Nosal, E. V. Moiseykin

Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg

Abstract: The effect of deep hole traps on the intensity and shape of the dosimetric peak of thermoluminescence (TL) has been studied at 450 K in anion-defect alumina single crystals. It has been shown that filling of deep hole centers leads to a decrease in the sensitivity to radiation of crystals with a small half-width of the TL peak and has no effect on the sensitivity of crystals with a broadened peak. It has been assumed that traps responsible for the TL dosimetric peak broadening are of hole nature, which can be caused by the presence of Ti$^{3+}$ ions in the corundum lattice. The results obtained have been interpreted within the modified model of the interactive system of traps.

Received: 05.04.2011

 English version: Physics of the Solid State, 2011, 53:10, 2141–2146

Bibliographic databases:

•