Anomalous luminescence of impurity-bound excitons in lithium borate crystals doped with cerium ions / Ogorodnikov I. N.,Pustovarov V. A. // JETP LETTERS. - 2012. - V. 96, l. 5. - P. 308-312.

ISSN/EISSN:

0021-3640 / нет данных

Type:

Article

Abstract:

The spectra and relaxation kinetics of the anomalous (tau < 10 ns) luminescence of Li6GdB3O9:Ce3+ crystals have been experimentally detected. The time-resolved vacuum ultraviolet spectroscopy study has shown that optical transitions at 6.2 eV, caused by the transfer of an electron from the 4f (1) ground state of Ce3+ to autoionizing states near the conduction band bottom of a crystal, lead to the formation of an impurity-bound exciton with the hole component localized on the 4f state of Ce3+ and the electron localized on states of the conduction band bottom. It has been found that the decay of such an exciton in Li6GdB3O9:Ce3+ occurs through radiative recombination, leading to fast luminescence at 4.25 eV. The energy threshold for the formation of the impurity-bound exciton has been determined. The distribution functions of elementary relaxations over the reaction rate constants H(k), which determine the relaxation kinetics and luminescence quenching processes, have been calculated.

Author keywords:

LI6GD(BO3)(3)/CE3+ CRYSTALS; SINGLE-CRYSTALS; SPECTROSCOPY; EMISSION; SCINTILLATION

DOI:

10.1134/S0021364012170122

Web of Science ID:

ISI:000310836600007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	LI6GD(BO3)(3)/CE3+ CRYSTALS; SINGLE-CRYSTALS; SPECTROSCOPY; EMISSION; SCINTILLATION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	igor.ogorodnikov@bk.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Funding-Acknowledgement	HASYLAB DESY {[}II-20080019]
Funding-Text	We are grateful to A. V. Tolmachev and R. P. Yavetskii for the crystals for this study. This work was supported in part by HASYLAB DESY (project no. II-20080019 for beamline I of the SUPERLUMI station).
Number-of-Cited-References	12
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	13
Journal-ISO	Jetp Lett.
Doc-Delivery-Number	033YF