Luminescence and radiation-induced color centers in anion-defective alumina crystals after high-dose irradiation / Kortov V. S.,Pustovarov V. A.,Zvonarev S. V.,Shtang T. V. // RADIATION MEASUREMENTS. - 2016. - V. 90, l. SI. - P. 90-93.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article; Proceedings Paper

Abstract:

A method of UV spectroscopy was used to measure photoluminescence (PL) spectra and photoluminescence excitation (PLE) spectra in anion-defective alumina crystals exposed to high doses of gamma-radiation. An additional emission band in the range of 1.6-2.75 eV appears in the exposed crystals. Aggregate F-2-type centers in different charge states are responsible for this band. It was found that growing intensity of PL aggregate centers occurs at doses corresponding to saturation of dose response and is accompanied by a sharp drop in the intensity of F+-band in the PL spectrum resulting from combination of F+-centers into aggregates. Uncharged F-2-centers are formed when electrons are trapped by F-2(+) and F-2(2+)-centers. The main role of F+-centers in radiation-induced transformations of color centers under high-dose irradiation of anion-defective alumina crystals was indicated. (C) 2016 Elseyier Ltd. All rights reserved.

Author keywords:

Alumina; Oxygen vacancies; Aggregated centers; Photoluminescence THERMOLUMINESCENCE

DOI:

10.1016/j.radmeas.2016.01.010

Web of Science ID:

ISI:000378470500021

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL
Note	9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation (LUMDETR), Tartu, ESTONIA, SEP 20-25, 2015
Organization	Univ Tartu, Inst Phys
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	THERMOLUMINESCENCE
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	vskortov@mail.ru
Number-of-Cited-References	10
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	7
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	DP4MR