Photoluminescence and thermoluminescence of titanium ions in sapphire crystals / Molnar G,Benabdesselam M,Borossay J,Lapraz D,Iacconi P,Kortov VS,Surdo AI // RADIATION MEASUREMENTS. - 2001. - V. 33, l. 5. - P. 663-667.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article; Proceedings Paper

Abstract:

Several titanium species (Ti(3+), Ti(4+), Ti(4+)-V(Al) clusters) were identified in sapphire samples from their optical spectra. In highly reduced samples, we observed only Ti(3+) centres while oxidized samples contain Ti(3+) and Ti(4+) ions as well. The formation of Ti(4+) ions occurs simultaneously with the formation of aluminium-vacancies which are charge compensators for Ti(4+) ions and act as hole traps in charge exchange process. We could observe locally and non-locally compensated Ti(4+) as well. It is shown that Ti(3+) is a deep hole trap while Ti(4+) is a deep electron trap. In the TL process they act as recombination centers for electrons and holes, respectively. However, in TL we observed only the emission of locally compensated Ti(4+), probably because of spatial correlation. (C) 2001 Elsevier Science Ltd. All rights reserved.

Author keywords:

sapphire; titanium; thermoluminescence; photoluminescence LUMINESCENCE; AL2O3; ALPHA-AL2O3; EMISSION

DOI:

10.1016/S1350-4487(01)00080-4

Web of Science ID:

ISI:000170916000040

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Note	4th European Conference on Luminescent Detectors and Transformers of Ionizing Radiation (LUMDETR 2000), RIGA, LATVIA, AUG 14-17, 2000
Organization	European Commiss; Council Sci Latvia
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	LUMINESCENCE; AL2O3; ALPHA-AL2O3; EMISSION
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	gmolnar@unice.fr
ResearcherID-Numbers	Molnar, Gabor/Q-6874-2016
ORCID-Numbers	Molnar, Gabor/0000-0001-6032-6393
Number-of-Cited-References	11
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	471EU