Defect evolution and photoluminescence in anion-defective alumina single crystals exposed to high doses of gamma-rays / Kortov V. S.,Pustovarov V. A.,Shtang T. V. // RADIATION MEASUREMENTS. - 2016. - V. 85, l. . - P. 51-56.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article

Abstract:

A method of luminescent UV and VUV spectroscopy was used to study the evolution of color centers in anion-defective alumina single crystals exposed to high doses of gamma-radiation. A sharp drop in the intensity of the emission bands and, therefore, the concentration of F+ and F-centers associated with the formation of aggregate F-2-type centers was found. The aggregate centers create an additional emission band in the range of (1.8-2.8) eV. When the crystals are exposed to middle and high doses, the photoluminescence (PL) intensity is the highest in the emission band of Fi(2)(2+)-centers, which indicates a high concentration of the aggregates from singly charged oxygen vacancies (of F+-centers). When PL of the crystals exposed to high doses is excited with synchrotron radiation of the VUV range, a wide emission band in the red and near infrared (NIR) regions is registered. The centers related presumably to impurity defects, their aggregates and clusters consisting of several oxygen vacancies are responsible for this emission band. (C) 2015 Elsevier Ltd. All rights reserved.

Author keywords:

Alumina; VUV spectroscopy; Oxygen vacancies; Aggregate centers; High-dose irradiation THERMOLUMINESCENCE; LUMINESCENCE; ALPHA-AL2O3; RADIATION; DOSIMETRY; SAPPHIRE; IONS

DOI:

10.1016/j.radmeas.2015.12.009

Web of Science ID:

ISI:000370089600006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	THERMOLUMINESCENCE; LUMINESCENCE; ALPHA-AL2O3; RADIATION; DOSIMETRY; SAPPHIRE; IONS
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	vskortov@mail.ru
Funding-Acknowledgement	HASILAB DESY {[}N 20110050]
Funding-Text	This work has been done as a part of the governmental task (3.1016.2014/k) by the Ministry of Education and Science of the Russian Federation and supported by HASILAB DESY (Project N 20110050).
Number-of-Cited-References	29
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	10
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	DD7FR