Publication Details:
Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
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Title:
RADIATION-INDUCED EFFECTS IN CORUNDUM SINGLE CRYSTALS
Creator:
V. V. Harutyunyan ; E. M. Aleksanyan ; N. E. Grigoryan ; V. S. Baghdasaryan ; V. Jh. Yeghiazaryan
Corporate Creators:
A. I. Alikhanyan National Scientific Laboratory, Yerevan, Armenia ; Armenian State Pedagogical University after Khachatur Abovyan
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Abstract:
It is shown that high-energy particles create stable structural defects in the corundum single crystal lattice due to knocking-out of atoms from their standard positions in anion and cation sub-lattices. These defects are mainly associated with F and F+ centers as well as with other vacancies, interstitials and complex defects such as [Ali + F] type aggregate centers. A mechanism of “radiation memory” in corundum single crystals consisting in restoration of some optical absorption bands within 190-315 nm range after irradiation and thermal treatment at high temperatures with subsequent X-ray irradiation, is discussed.