Temperature dependence of the defect luminescence in La2Be2O5 single crystals / Ogorodnikov I. N.,Pustovarov V. A. // RADIATION MEASUREMENTS. - 2015. - V. 82, l. . - P. 31-39.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article

Abstract:

Temperature quenching (TQ) curves in the temperature range of 80-500 K have been studied for both the undoped, and doped with RE3+-ions (RE = Ce, Eu, Er, Pr, Nd) lanthanum beryllate (BLO) single crystals. Photoluminescence spectra and TQ-curves were recorded upon excitation in the absorption bands of the lattice defects. The reaction rate model has been developed to describe the experimental results. The model includes two competing processes with characteristic temperatures: thermal quenching of intracenter PL (T-1) and thermally stimulated migration of electronic excitations (T-2). The competition between these two processes leads to the observed non-monotonic TQ-curves. The rationalized formulas using three parameters (intensity, activation energy, characteristic temperature), were developed to describe each of these processes. Within the framework of the unified model, all the experimental results were described and the best fit parameters were obtained. Classification of the investigated lanthanum beryllate crystals was carried out in line with the best fit parameters obtained for the TQ-curves. (C) 2015 Elsevier Ltd. All rights reserved.

Author keywords:

Photoluminescence; Thermal quenching; Be2La2O5; Lanthanum beryllate crystals; Lattice defects LANTHANUM BERYLLATE; GROWTH

DOI:

10.1016/j.radmeas.2015.08.004

Web of Science ID:

ISI:000366079300006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	LANTHANUM BERYLLATE; GROWTH
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	i.n.ogorodnikov@urfu.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Funding-Acknowledgement	Ministry of Education and Science, Russia
Funding-Text	The authors are grateful to V. N. Matrosov for providing samples for research. This work was partially supported by the Ministry of Education and Science, Russia (the basic part of the government mandate).
Number-of-Cited-References	26
Usage-Count-Since-2013	3
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	CY0EN