On the nature of slow emission at 3.8 eV in crystalline alpha-Al2O3-delta / Surdo A. I.,Vlasov M. I.,Milman I. I. // RADIATION MEASUREMENTS. - 2016. - V. 90, l. SI. - P. 99-103.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article; Proceedings Paper

Abstract:

A comparative research of thermoluminescence, X-ray luminescence, and photoluminescence in initial and thermo-optically treated and X-ray irradiated anion-defective corundum (alpha-Al2O3-delta) samples has been carried out. A new type of center has been identified emitting near 3.6-3.8 eV up to 800 K, excited at 5.9 eV, and having a lifetime of about 300 ms at 300 K in the excited state. This type of centers was found to be created only at thermo-optical treatment, including ultraviolet irradiation with lambda approximate to 280-320 nm and simultaneous heating of alpha-Al2O3-delta samples to 550-670 K, and be destructed thermally at T >= 670 K or when exposed to X-ray radiation or light with quantum energies of 5.9 and 3.1 eV. The center type found is assumed to have a complex structure consisting of interstitial aluminum, anion and cation vacancy, and slightly displaced regular ions in the nearest surrounding. (C) 2015 Elsevier Ltd. All rights reserved.

Author keywords:

Anion-defective corundum; Thermo-optical treatment; Defect formation; Radioluminescence; Photoluminescence; Luminescent centers OPTICAL-PROPERTIES; LUMINESCENCE; CENTERS

DOI:

10.1016/j.radmeas.2015.12.033

Web of Science ID:

ISI:000378470500023

Соавторы в МНС:

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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	OPTICAL-PROPERTIES; LUMINESCENCE; CENTERS
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	surdo@ecko.uran.ru
ResearcherID-Numbers	Vlasov, Maxim/M-1739-2016
Number-of-Cited-References	11
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	6
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	DP4MR