Radiation-induced processes and defects in alkali and alkaline-earth borate crystals / Ogorodnikov IN,Yakovlev VY,Isaenko LI // RADIATION MEASUREMENTS. - 2004. - V. 38, l. 4-6, SI. - P. 659-662.

ISSN/EISSN:

1350-4487 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The paper presents the results of a study of the radiation-induced processes and defects in nonlinear optical crystals Li2B4O7 (LTB), LiB3O5 (LBO), CsLiB6O10, KB5O8.4H(2)O, beta-BaB2O4. It was revealed that a pulsed electron beam irradiation at 290 K forms the radiation-induced pairs of the `vacancy-interstitial atom' defects in the cation sublattice of these crystals. This gives rise to a creation of metastable electronic (interstitial atom) and hole (small-radius polaron near the cation vacancy) centers in high concentrations. Optical hole-transitions from the local level of the trapped hole centers to the valence band states are responsible for the transient optical absorptions (TOA) of borates in the visible and UV spectral ranges. A sublattice of the weakly bound mobile lithium cations in LTB and LBO favors a spatial separation of the radiation-induced pair defects `hole polaron near Li-vacancy-mobile interstitial Li-0 atom'. Their decay rated by the electron-hole nonradiative tunnel recombination determines a peculiar feature of the TOA decay kinetics in LT13 and LBO. (C) 2004 Elsevier Ltd. All rights reserved.

Author keywords:

Li2B4O7 (LTB); LiB3O5 (LBO); CsLiB6O10 (CLBO); KB5O8-4H(2)O (KB5); beta-BaB2O4 (BBO); radiation defects; mobile cations LIB3O5; LUMINESCENCE

DOI:

10.1016/j.radmeas.2004.01.022

Web of Science ID:

ISI:000223807600072

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG-DEC
Note	5th European Conference on Luminescent Detectors and Transformers of Ionising Radiation (LUMDETR 2003), Prague, CZECH REPUBLIC, SEP 01-05, 2003
Organization	Acad Sci Czech Republic, Inst Phys; Czech Tech Univ, Fac Nucl Sci \& Phys Engn
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	LIB3O5; LUMINESCENCE
Research-Areas	Nuclear Science \& Technology
Web-of-Science-Categories	Nuclear Science \& Technology
Author-Email	ogo@dpt.ustu.ru
ResearcherID-Numbers	Isaenko, Ludmila/A-5272-2014 Ogorodnikov, Igor/B-4162-2011 Isaenko, Ludmila/H-7620-2013 Yakovlev, Victor/P-4197-2015
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Number-of-Cited-References	8
Usage-Count-Since-2013	4
Journal-ISO	Radiat. Meas.
Doc-Delivery-Number	853DV