Optical and luminescent VUV spectroscopy of La2Be2O5 crystals / Pustovarov VA,Petrov VL,Zinin EI,Kirm M,Tsimmerer G,Shul'gin BV // PHYSICS OF THE SOLID STATE. - 2000. - V. 42, l. 2. - P. 253-256.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

Electronic excitations and the processes of their radiative relaxation are studied in pure and Ce3+ ion-doped crystals of lanthanum beryllate excited by synchrotron radiation in the x-ray and VUV ranges by methods of optical and luminescent vacuum ultraviolet time-resolved spectroscopy. Manifestations of excitons of the valence band are absent in the reflection spectra. However, a fast (tau = 1.7 ns) and a slow (microsecond range) channel corresponding to two possible types of self-trapped excitons (STE) are found in radiative relaxation of intrinsic electronic excitations at T = 10 K. The slow channel corresponds to emission of STE formed through recombination, the fast channel corresponds to emission of relaxed metastable excitons from the STE state. In the energy region higher than 14 eV (E > 2E(g)), the effect of multiplication of electronic excitations due to generation of secondary electron-hole pairs resulting from inelastic scattering of both hot photoelectrons and hot photoholes is exhibited. (C) 2000 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

ALKALI-HALIDE CRYSTALS; SYNCHROTRON RADIATION; EXCITATION; RELAXATION; EXCITONS

DOI:

10.1134/1.1131155

Web of Science ID:

ISI:000084774300010

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 USA
Language	English
Keywords-Plus	ALKALI-HALIDE CRYSTALS; SYNCHROTRON RADIATION; EXCITATION; RELAXATION; EXCITONS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Kirm, Marco/M-1533-2016
ORCID-Numbers	Kirm, Marco/0000-0002-1833-6894
Number-of-Cited-References	17
Usage-Count-Since-2013	2
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	274PM