EPR and photoluminescence study of irradiated anion-defective alumina single crystals / Kortov V. S.,Ananchenko D. V.,Konev S. F.,Pustovarov V. A. // NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - 2017. - V. 407, l. . - P. 191-196.

ISSN/EISSN:

0168-583X / 1872-9584

Type:

Article

Abstract:

Electron paramagnetic resonance (EPR) and photoluminescence (PL) spectra of anion-defective alumina single crystals were measured. Exposure to a dose 10 Gy-1 kGy causes isotropic EPR signal of a complex form, this signal{''} contains narrow and broad components. At the same time, in the PL spectrum alongside with a band of F+-centers (3.8 eV) an additional emission band with the maximum of 2.25 eV is registered. This band corresponds to aggregate F-2(2+)-centers which were create under irradiation. By comparing measurements in EPR and PL spectra with further stepped annealing in the temperature range of 773-1473 K of the samples exposed to the same doses, we were able to conclude that a narrow component of isotropic EPR signal is associated with the formation of paramagnetic F-2(2+)-centers under irradiation. A wide component can be caused by deep hole traps which are created by a complex defect (V-Al(2+) - F+) with a localized hole. (C) 2017 Elsevier B.V. All rights reserved.

Author keywords:

Alumina; EPR; PL spectra; Vacancies; Aggregate centers ELECTRON-SPIN-RESONANCE; ALPHA-AL2O3 CRYSTALS; OPTICAL-PROPERTIES; F+ CENTER; LUMINESCENCE; AL2O3; THERMOLUMINESCENT; CENTERS; DOSIMETRY; VACANCIES

DOI:

10.1016/j.nimb.2017.06.024

Web of Science ID:

ISI:000409290500027

Соавторы в МНС:

Другие поля

Поле	Значение
Month	SEP 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1872-9584
Keywords-Plus	ELECTRON-SPIN-RESONANCE; ALPHA-AL2O3 CRYSTALS; OPTICAL-PROPERTIES; F+ CENTER; LUMINESCENCE; AL2O3; THERMOLUMINESCENT; CENTERS; DOSIMETRY; VACANCIES
Research-Areas	Instruments \& Instrumentation; Nuclear Science \& Technology; Physics
Web-of-Science-Categories	Instruments \& Instrumentation; Nuclear Science \& Technology; Physics, Atomic, Molecular \& Chemical; Physics, Nuclear
Author-Email	vskortov@mail.ru
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}3.1485.2017/4.6]
Funding-Text	The work has been funded by the Ministry of Education and Science of the Russian Federation (Government task No 3.1485.2017/4.6).
Number-of-Cited-References	39
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	1
Journal-ISO	Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
Doc-Delivery-Number	FF8TK